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Operator
Good morning and welcome, everyone, to Endava plc Earnings Release for Fourth Quarter/Full Year 2021 Conference Call. (Operator Instructions) Thank you.
And now I would like to turn the call over to our presenter of for today, Laurence Madsen. You may begin the conference.
Laurence Madsen - IR Manager
Thank you. Good afternoon, everyone, and welcome to Endava's fourth quarter and full year fiscal 2021 conference call. As a reminder, this conference call is being recorded. Joining me today are John Cotterell, Endava's Chief Executive Officer, and Mark Thurston, Endava's Chief Financial Officer.
Before we begin, a quick reminder to our listeners. Our remarks today include forward-looking statements, including our guidance for Q1 fiscal year 2022 and for the full fiscal year 2022, our perceived opportunities, the potential impacts of the COVID-19 pandemic and associated global economic uncertainty, including with respect to our expectations regarding future work arrangements for our people; our expectations regarding digital transformation of existing businesses and industry; the necessity of digital transformation for many companies and Endava's ability to benefit there from; anticipated client demand for Endava's services; our ability to attract and retain employees; and our ability to execute on sustainability objectives; as well as other forward-looking statements.
These statements are subject to risks and uncertainties that could cause actual results to differ materially from those contained in the forward-looking statements. Actual results and the timing of certain events may differ materially from the results and timing predicted or implied by such forward-looking statements and reported results should not be considered as an indication of future performance.
Please note that these forward-looking statements made during this conference call speak only as of today's date and the company undertakes no obligation to update them to reflect subsequent events or circumstances other than to the extent required by law. Please refer to the Risk Factors section of our annual report on Form 20-F filed with the Securities and Exchange Commission on September 28, 2021, which contains a discussion of important factors that could cause actual results to differ materially from those contained in any forward-looking statements.
Also, during the call, we'll present both IFRS and non-IFRS financial measures. A reconciliation of non-IFRS to IFRS measures is included in today's earnings press release, which you can find on our Investor Relations website. A link to the replay of this call will also be available there.
With that, I'll turn the call over to John.
John E. Cotterell - CEO & Director
Thank you, Laurence. I'd like to thank you all for joining us today, and I hope you're all staying safe and healthy. Mark and I are pleased to be here to provide you an update on our business and financial performance for the 3 months ended June 30, 2021, and for the full fiscal year 2021.
While the COVID vaccine campaign remains underway around the globe, the Delta variant is challenging a full return to normality. At Endava, we continue to prioritize the safety and well-being of our people with deferring measures across the world that this pandemic affects the countries and the communities in which they live and work. However, despite this difficult environment, we continued to experience very strong demand for our digital services in all of our regions and verticals, and the pace of increase in demand is only accelerating.
Endava finished the year strongly with revenue of GBP 133.6 million for Q4 of our fiscal year 2021, representing a 54.9% year-on-year increase in constant currency from GBP 90.5 million in the same period in the prior year. We ended the quarter with an adjusted profit after-tax for the period of GBP 23.6 million, representing an 83.7% year-on-year increase from GBP 12.8 million in the same period in the prior year.
Our strong revenue growth continues to be driven by both the expansion of work for our existing clients and the acquisition of new ones during the quarter. We ended the quarter with 615 active clients, up from 416 at the end of the same period in the prior year, a 47.8% year-on-year increase. We continued to expand our penetration with our largest clients, and the average revenue from our top 10 clients grew by 31% year-on-year and revenue from clients who paid us above GBP 5 million increased 29.5% year on there. And we continued to increase the number of clients who are paying us in excess of GBP 1 million per year with 85 clients in this category, up from 65 in the same period last year, representing a 30.8% year-on-year increase.
Moving on to our results for the full fiscal year 2021. We reported revenue of GBP 446.3 million, representing a 30.4% year-on-year increase in constant currency and adjusting for the sale of the Worldpay Captive. Our revenue CAGR for the last 5 years stands at 29.4%. In the last fiscal year, we grew in all of our regions and verticals. Our North American business posted a solid revenue increase of 40% year-on-year. For the year, Europe grew 25.7% and the U.K. 20.3%. All of our verticals also grew nicely with Payments and Financial Services up 22.3% year-on-year, TMT up 34.1% and Other up 30.9%. Our strong revenue growth continues to translate into solid profitability, and we ended the year with an adjusted PBT margin of 20.6% compared to 19.5% in fiscal year '20.
As shown by our acquisitions of Five and Levvel this past financial year, we continued to invest in our U.S. business. Both Five and Levvel are culturally very similar to Endava, and our integrations of these businesses is progressing smoothly. Further, we are encouraged by joint commercial opportunities already presented themselves. We've had an opportunity to pull Five's product design teams into programs within new areas of 2 existing Endava clients, a U.S. fintech and a U.K. insurer as well as inversely bring to bear Endava's scale to grow and expand one of Five's largest clients. Together with the team at Levvel, we're making meaningful commercial progress with a number of new clients, most interestingly, with a U.S. airline about an overhaul of their main digital experience platform.
I'd actually like to highlight some of the work we are doing in the U.S. where we're working with clients in many different industries. As an implementation partner of Finxact, a next-gen cloud-native core banking platform, we're helping multiple U.S. banks implement core banking solutions as part of a broader digital transformation programs. We are working with an alternative investments fintech to create the go-forward product strategy from business vision to high level targets take digital capabilities. The client is an alternative investment marketplace provider who has a rapidly growing business on both sides of the marketplace and needed to improve market responsiveness through increased delivery capacity and platform scalability.
Through rapid product envisioning, we were able to distill the process visions of their leadership down to actionable and transparent goals. Then, building upon a clear set of outcomes, we helped the client assess their existing digital capabilities to yield a clear path forward for their infrastructure, data and delivery agility road map.
Valley Bank's strategic vision is to take ownership of their technology states and rebuild with best-in-class capabilities to drive innovation and speed to market. Part of this is embracing modern technology trends and architecture platforms and DevOps with the goal to deliver truly innovative technology-enabled relationship banking through customer-friendly products that are much faster than they have been able to do in the past. Endava is helping Valley realize that technical vision, working on platforms, marketing systems, client onboarding systems and DevOps transformation across the bank.
Core digital media, a top 10 advertiser in the U.S. across display, page search, mobile and social marketing had engaged with Endava for the last 3 years as a strategic technology consultant. Core Digital's new offering, MyWalletJoy, which provides content and tools to help their users to get a handle on the financial impacts of their life goals, was developed in large part by Endava's staff working in tandem with Core Digital product owners and creators. In addition, Endava engineers have enabled Core Digital to modernize their core financial services environment from the legacy monolithic architecture to a domain-driven design, micro services oriented architecture, creating a more scalable and maintainable infrastructure.
Endava has also been working with a leading life sciences and diagnostics company on their front end and back end design in order to simplify their existing design. The project resulted in greater efficiency and allows the client to stay current with functional and security updates and upgrades.
Moving on to the technology side. There are 2 trends that we've observed that I would like to highlight today. They are both focused on how building digital products used across a range of industries with our strategic services and drive demand for other services that we offer.
The move from running IT projects to building software-based products has been underway for some years, but we are seeing a renewed level of interest across many industry sectors from both clients and potential clients who want to explore what this means for their business. This interest has led to a strong demand for digital product strategy and design expertise, helping clients to improve the digital experience for both their customers and their employees.
In some cases, this focus is a new strategic direction such as opening up a new direct-to-consumer channel. In other cases, it's about replacing all user interfaces with modern task-oriented ones. And finally, it can also lead to rethinking the entire digital experience for existing successful business lines. This rethinking drives strong demand for our digital strategy, product design, user experience design and user interface development expertise as well as the modern software engineering capability we have to provide the underlying cloud-first application platform to support these digital workflows.
Companies have also recognized the need to improve the efficiency of their internal software development activities and to improve their software developer experience. This recognition has led to increased demand for our software delivery automation skills, CI, CD, cloud, automation, and in some cases, the creation of an entire new developer platforms to make enterprise developers more effective.
Turning to the second trend. We've been performing software architecture reviews for many years and have developed a flexible and repeatable approach for delivering these engagements. As I mentioned last quarter, we have seen a lot of interest in application rationalization and modernization, particularly in the financial services. We are now also seeing wider demand for more general architectural reviews to help clients understand the strengths and weaknesses of their existing software applications and to work with them to identify options for their future evolution. We find that this review often leads to long-term software development engagements as the application road maps we help clients define require significant amounts of work to refactor, rebuild or even entirely replace parts of their application estate.
Growth in fintech continues to be very strong as we see widespread innovation and change occurring across many parts of the financial services industry, and we continue to expand in this area, including payments, insurance, banking and asset management.
If we move to cloud computing, the constant innovation in payments, the widespread use of APIs to access componentized services, the emergence of modern API-based software package vendors and the entrance of challenger startups in established business areas are all trends that are driving demand for our services. Our client growth continues to translate into strong employee growth. We ended the fiscal year with 8,883 employees, a 34.1% increase from 6,624 in the same period last year. In the last fiscal year, we added 2,259 net new employees, of which 756 were in the last quarter. We continue to be an employer of choice in our core locations, which allows us to continue to recruit the best talent.
Importantly, our attrition rate remains extremely low. We believe people join Endava for a career, not to work on a single assignment. And that is our ability to keep our employees engaged and challenged that has allowed us to keep our attrition level low. While competition for talent remains strong, we are not having difficulties recruiting and retaining the employees we need, although we are careful to avoid over-expanding as a result of the huge demand that we touched on earlier.
While more employees are choosing to return to the office, the majority of our workforce continues to work from home most of the time. We are committed to a hybrid model of in-person and remote working with the best way to allow flexibility for our people whilst enabling team creativity and productivity to thrive. We are slowly ramping the hybrid model back up as the pandemic conditions evolve.
We remain very focused on providing the best work environment for our employees. Our We Care program focused on diversity, inclusion and the well-being this last quarter, which we launched at our first Endava Inclusion Week. We hosted a number of inspiring speakers and impactful master classes, covering topics ranging from the role we all play in a truly diverse workforce through to disability, support and parenting. And we were delighted to see over 3,000 attendees from across the business engage.
In August, we also launched our Diversity and Inclusion Forum, which builds on the great work we've already done in this space. The forum is designed to bring together a representative group of Endavans, who will share their voice and play a part in shaping our inclusion agenda going forward. In addition, we're still rolling out our inclusive leadership training and also enhanced Endava's Speak Up Safely initiative by introducing a network of reps across the business, which gives our colleagues a new way to raise concerns confidentially and brings a human face to the process.
We were also delighted this quarter to have Endava recognized by the Romanian Business Services Forum with 3 awards, including Business Services Company of the Year and Employer of the Year. Our Endava Wellbeing program, which continues to experience high levels of engagement with over 7,000 attendees to our master classes and over 2,700 attendance in our well-being workshops was also recognized as Best Wellbeing Initiative. These awards reinforce the recognition that Endava strives to be an employer of choice in our key markets, attracting and retaining the best people.
Finally, I'm pleased to announce that today we have just published our first We Care sustainability report, which highlights our ongoing commitment to meet our environmental, social and governance responsibilities. You can view the report in the We Care section of our website, where you will also find a short video of the highlights. As demonstrated by our results, we believe that our services are at the core of our clients' digital journey. We are excited about the opportunities in front of us and remain confident in our ability to deliver value for all of our stakeholders.
Let me end by thanking our people for their resiliency and adaptability as they continue to deliver excellence, quality and value to our clients in diverse home and hybrid working context. They enable the performance I've just discussed. Endavans, we appreciate your dedication and loyalty.
I will now pass the call on to Mark, who will walk you through our financial results for the quarter and provide guidance for the coming quarter and the new fiscal year.
Mark S. Thurston - CFO & Director
Thanks, John. Before we get into the numbers, I'd like to apologize for the delay in moving our reporting date. The closed process took longer than we anticipated as we had to work with our auditors to settle on the treatment of cash received post year-end for a large receivable. This resulted in an overall bad debt provision release in the quarter of GBP 1.3 million, which is shown on the face of the profit and loss account. This item boosted the already strong quarter delivered by the underlying business.
Endava's revenue totaled GBP 133.6 million for the 3 months ended June 30, 2021, compared to GBP 90.5 million in the same period last year, a 47.7% increase over the same period in the prior year. In constant currency, our revenue growth rate was 54.9%. Profit before tax for Q4 fiscal year 2021 was GBP 18.5 million compared to GBP 6.7 million in the same period in the prior year. Our adjusted profit before tax for the 3 months ended June 30, 2021, was GBP 29.3 million compared to GBP 15.2 million for the same period last year. Our adjusted profit before tax margin was 21.9% for the 3 months ended June 30, 2021, compared to 16.8% for the same period last year.
Adjusted profit before tax, adjusted PBT is defined as the company's profit before tax adjusted to exclude the impact of share-based compensation expense, discretionary EBT bonus, amortization of acquired intangible assets, realized and unrealized foreign currency exchange gains and losses, net gain on disposal of subsidiary. Share-based compensation expense, amortization of acquired intangible assets and unrealized foreign currency gains are non-cash expenses. Adjusted PBT margin is adjusted PBT as a percentage of total revenue.
Our adjusted diluted EPS was 41p for the 3 months ended June 30, 2021, calculated on 57.5 million diluted shares as compared to 23p for the same period last year, calculated on 56.4 million diluted shares. Revenue from our 10 largest clients accounted for 36% of revenue for the 3 months ended June 30, 2021, compared to 40% for the same period last year. Additionally, the average spend per client from our 10 largest clients increased from GBP 3.6 million to GBP 4.9 million for the 3 months ended June 30, 2021, representing a 31.1% year-over-year increase.
In the 3 months ended June 30, 2021, North America accounted for 37% of revenue compared to 31% in the same period last year. Europe accounted for 21% of revenue compared to 24% in the same period last year. And the U.K. accounted for 40% of revenue compared to 42% in the same period last year, while the rest of the world accounted for 2% compared to 3% in the same period last year. Revenue from North America grew 77.4% for the 3 months ended June 30, 2021 over the same quarter of 2020. Comparing the same periods, revenue from Europe grew 26.9%, the U.K. grew 40.8%, and the rest of the world grew 10.7%.
We grew in all 3 of our industry verticals during the quarter. Revenue from Payments and Financial Services grew 46.4% for the 3 months ended June 30, 2021. Revenue from Payments and Financial Services accounted for 51% of revenue compared to 52% in the same period last year. Revenue from TMT grew 33.2% for the 3 months ended June 30, 2021 over the same quarter of 2020 and accounted for 25% of revenue compared to 28% in the same period last year. Revenue from Other grew 70.8% for the 3 months ended June 30, 2021 over the same quarter of 2020 and now accounts for 24% of revenue compared to 20% in the same period last year.
We now turn to adjusted free cash flow, which is our net cash provided by operating activities, plus grants received, less net purchases of non-current tangible and intangible assets. Our adjusted free cash flow was GBP 32.6 million for the 3 months ended June 30, 2021, compared to GBP 0.4 million during the same period last year. Our cash and cash equivalents at the end of the period remained strong at GBP 69.9 million at June 30, 2021, compared to GBP 101.3 million at June 30, 2020. We spent GBP 35.9 million net of cash acquired on the acquisition of Levvel during the quarter. CapEx for the 3 months ended June 30, 2021 as a percentage of revenue was 1.7% compared to 1.9% in the same period last year.
I'd now like to move on to some highlights for our fiscal year 2021. Endava's revenue totaled GBP 446.3 million for the fiscal year 2021 compared to GBP 351.0 million in the previous fiscal year, a 27.2% increase over prior year. In constant currency, our revenue growth rate was 29.6%, and adjusted for the sale of the Worldpay Captive, 30.4%. The profit before tax for the fiscal year 2021 was GBP 54.4 million compared to profit before tax of GBP 25.3 million in the prior year.
Our strong revenue growth continues to translate into solid profitability and our adjusted profit before tax for the fiscal year 2021 totaled GBP 92.1 million compared to GBP 68.6 million in the prior year, a 34.2% year-over-year increase. Our adjusted profit before tax margin was 20.6% for the fiscal year 2021 compared to 19.5% for last year. The year-over-year improvement in our adjusted profit before tax margin is mainly due to a continued positive pricing environment, foreign exchange rate tailwinds and control of SG&A expenses.
Our adjusted diluted EPS was GBP 1.30 for the fiscal year ended June 30, 2021, calculated on 57.1 million diluted shares as compared to GBP 1 in previous fiscal year, calculated on 56.1 million diluted shares, up 30% year-over-year. Revenue from our 10 largest clients accounted for 35% of revenue for the fiscal year ended June 2021 compared to 38% for the previous fiscal year. Additionally, the average spend per client from our 10 largest clients increased from GBP 13.4 to GBP 15.6 million, up 16.5% year-over-year.
We grew in all geographies on a year-over-year basis with North America up 40% year-over-year, Europe up 25.7%, U.K. up 20.3% and the Rest of World up 18.1%. However, excluding the impact of the Worldpay Captive from the prior year period, comparative growth in U.K. would have been 1.7% higher or 22.0%.
On a year-over-year basis, revenue from Payments and Financial Services increased 22.3%. However, excluding the impact of the Worldpay Captive from the prior year, comparative growth in this segment would have been 1.4% higher or 23.7%. On a year-over-year basis, TMT increased 34.1% and Other increased 13.9%. The year-over-year growth in Other came mainly from mobility, retail and health sec.
Our adjusted free cash flow was GBP 82.7 million for the fiscal year ended June 30, 2021, compared to GBP 31.4 million during the same period last year. We spent GBP 97.6 million net of cash acquired on acquisitions completed during the fiscal year. CapEx for the fiscal year ended June 30, 2021 as a percentage of revenue was 1.3% compared to 2.8% during the same period last year.
Our guidance for Q1 fiscal year 2022. Endava expects revenues will be in the range of GBP 143.0 million to GBP 145.0 million, representing constant currency revenue growth of between 56% and 58%. Endava expects adjusted diluted EPS to be in the range of 42p to 44p per share.
Our guidance for the full year fiscal year 2022 is as follows. Endava expects revenues will be in the range of GBP 608 million to GBP 615 million, representing constant currency growth of between 38% and 40%. Endava expects adjusted diluted EPS to be in the range of GBP 1.61 to GBP 1.67 per share. This above guidance for Q1 fiscal year 2022 and the full fiscal year 2022 assumes the exchange rates at the end of August when the exchange rate was GBP 1, USD 1.38 and EUR 1.17.
This concludes our prepared comments. Operator, we are now ready to open the line for Q&A.
Operator
(Operator Instructions) Your first question comes from Ashwin Shirvaikar of Citi.
Ashwin Vassant Shirvaikar - MD and lead Analyst
Congratulations on the good quarter and results. I think my question is, I mean, at this point, we obviously know that the end market environment is incredibly strong, evidence of sustainability of this environment as well. The supply side seems to be where some of these challenges are, but you don't -- at least in your prepared remarks, didn't see any evidence that you're seeing the same. Are you doing something differently with regards to hiring, retaining or is it basically less competitive geographies? Could you maybe comment a little bit more on the supply side with regards to the ability to keep hiring?
John E. Cotterell - CEO & Director
Sure. Ashwin, I mean, the recruitment of quality staff is always a challenge. And it requires successful businesses to build a market presence and a career proposition that's going to attract and retain the best. You touched on the strength of demand. The reality is that it is running ahead of our ability to deliver on the supply side.
Having said that, we've always guided the market that sort of 25% to 30% headcount growth organically is our sensible ceiling without growing beyond that place where our ability to onboard, train, equip our teams to perform in the Endava way is going to work. But there's a few factors that are playing into it at the moment, meaning, we're being able to grab a little bit beyond that usual ceiling. Firstly, our attrition remains low. It's around the 10% mark. It's moved up slightly from last quarter, but still well below the 15% that we target. And also, you'll be aware that during the summer of 2020, as the pandemic hit, we didn't make any lay-offs and we continued to promote staff in accordance with their experience and capability, which meant that last year we ended up growing slightly more senior staff profile than we would normally have.
And those 2 factors together, the lower attrition and that more senior profile has given us additional headroom for growth. And that's enabling us to push our headcount organically at greater than the 30% max that we'd normally go at without destabilizing our expansion. That's on the headcount side. It's probably where it converts to a higher revenue growth given the price rises that we're also achieving. But yes, it is -- we're seeing market demand that is the careful balance of making sure that we don't overwrap the business and start to lose the culture and the way in which we operate by over expanding.
Ashwin Vassant Shirvaikar - MD and lead Analyst
Those details are quite useful. One of your comments at the very beginning of your prepared remarks was not only is the environment strong, but it is also accelerating. And I just want to get your view with regards to as you formed your outlook, what assumptions did you make with regards to the accelerating or still accelerating part of demand?
Mark S. Thurston - CFO & Director
Ashwin, the demand is, as you've put out, strong. We're recruiting very quickly into that demand curve. We have taken a sort of accounts of pricing within that because as we're recruiting people, we are looking at packages to make sure that overall attrition stays in the right place. We've been, as you'd expect, organically growth is very strong in terms of the outlook for Q1. And in terms of the full year, we guide out to June. We also are forecasting strong growth there as well. But I think it's -- we haven't baked in all the pricing improvements that we think could be achieved in this market in the guide. But the underlying question about the strength of the demand is reflected in our guidance.
John E. Cotterell - CEO & Director
I think just to add to that. Our business model, as you're aware, is to start with smaller ideation phases with new clients or proof of concepts that we do. That's a small assignment that brings to life the way in which technology can impact our clients' business model. And as we bring that to life, there's an opportunity to scale what we're doing with that client as we take those systems into production, and that can significantly expand activity in the client footprint. And you all have observed in our numbers those new clients coming in is also expanding quite rapidly over the last year, going from 416 to 650. So we can see those bobbling up into larger engagements, and that's part of the acceleration that we're seeing.
Operator
(Operator Instructions) Your next question comes from Bryan Bergin of Cowen.
Bryan C. Bergin - MD & Analyst
A little bit of a follow-up question on the nature of client conversations and demand. Curious, is the extended urgency and prioritization of transformation initiatives translate into any changes in the contractual terms? So are you seeing any changes in terms of just average duration of engagements or opportunities around game sharing or other nonlinear revenue? And anything just to call out or quantify around that potential incremental pricing strength?
John E. Cotterell - CEO & Director
Let me pick up the first bit. The structure of client engagements is following our traditional pattern. It's getting bigger as we scale. So our larger clients are getting larger, as you all have observed. There is a little bit of a shift to slightly more fixed outcome contracts where we put some quality measures in alongside the T&M that we're delivering to clients. And that gives clients a little bit more assurance about our delivery as well as giving us some potential upside as we do well.
Mark, anything on that?
Mark S. Thurston - CFO & Director
Just in terms of the pricing, I think I'm going to reiterate the comments to Ashwin. Q4, very strong revenue per head. Sequentially, we were up from around 63%, 64% to 68%. We foresee that continuing as we outlook into the remainder of the year. And the guidance is basically being -- not prejudging that we will be able to secure all the price rises that we think we will do over the overall period.
John E. Cotterell - CEO & Director
I mean just on price, we're very, very focused on delivered value to clients. And our whole ideation approach enables us to articulate value early in the decision-making cycle with clients, and that helps to protect prices for us.
Bryan C. Bergin - MD & Analyst
Makes sense. And then a follow-up just around travel resumption. So as you built the forecast for '22, can you dig in a bit more around your assumptions for costs or on the operating model in travel? Are you assuming the current next year in work from home? Are you building back some increase of on-site and then associated costs with that?
Mark S. Thurston - CFO & Director
We are building in increased travel basically in the second half of the guide. We foresee things opening up as our sales teams get in front of clients. In terms of the impact on revenue side, in terms of our pass-through for us visiting clients, et cetera, that is not going to be significant, although we are baking in much more travel as our teams see clients and sales engagements with clients in the second half. But it's not a seismic change in terms of the profitability profile.
Operator
Your next question comes from Mayank Tandon of Needham.
Mayank Tandon - Senior Analyst
Congratulations on the strong quarter. Maybe, John or Mark, I wanted to just ask about the client penetration opportunity. You shared some metrics around the top 10 accounts. And I think the fiscal year '21, I heard you had GBP 15.5 million average revenue in your top 10. How much can that grow? Just trying to get a feel for the runway within the top 10 client portfolio as we move forward.
John E. Cotterell - CEO & Director
So most of our top 10 are very large enterprises where there's a lot of opportunity to grow what we're doing with them. In fact, it's one of our key parts of our business model is to start with a client in one product area, do the ideation. As they see the impact that they can have on their business, they take that product into production. And as it's successful, expand what we're doing with them to accelerate our success in the market. But then with these large customers, there's often many other parts of their business where once they see that success that comes out of working with us, they're keen to pull us into other business areas and to push product forward across their other lines of business. So that's where the client penetration opportunity comes from. That's what a big part of what drives the growth in our -- it is part of our planning model to see our larger clients continue to grow, although obviously as the business scales, they slowly come down as a proportion of our overall business.
Mark S. Thurston - CFO & Director
And I think you can see that momentum as we went through Q4 because the average spend of the top 10 increased by over 15% partly in our full year slides, you can see the year-on-year. But that growth in the top 10 certainly accelerated in Q4.
Mayank Tandon - Senior Analyst
And then just a quick follow-up. I wanted to ask about the margin trajectory as we move through the year. Obviously, you have the wage pressures. How are you able to offset that? If you could just talk about the levers that you have in the model and negate the impact of wage pressures? And how should we expect margins to run over the course of fiscal 2022?
Mark S. Thurston - CFO & Director
So I expect near-term Q1, our gross margin, which I guess is a key focus; we will be equivalent basically for the exit rate to Q4. But I think we will follow the traditional picture that we have as we go through the year because our major pay around goes through 1st of January. So we always get some dilution of margin as those pay rises go through and recover over the balance of the year. So I don't think there's going to be much change from that traditional picture where our gross margins will be relatively strong in the first 2 quarters of the year. The main pay rise goes through. So we take a little bit of a knock back and then we recover it through the balance of Q3, Q4.
I think the only difference or a thing to add about that, there will be some downward pressure as we offer competitive packages. We want to keep attrition in the right place. Note, as we said, it's at 10% this quarter and that's what we -- where we would like to keep it. But within those parameters and managing our overall grade, distribution and onboarding the people that we need, we think we can manage that pressure.
Operator
Your next question comes from Bryan Keane of Deutsche Bank.
Bryan Connell Keane - Research Analyst
Congrats on the phenomenal growth. Just looking at the verticals, it looks like Other has become a bigger percentage from last quarter. I think it was 20% of the mix, now it's 24%. That was a decent size move. Was that due to the acquisition that moved that or is there some extra demand inside of consumer healthcare and retail that's pushing up that percentage?
Mark S. Thurston - CFO & Director
It's a mixture of the 2, to be honest. So level of acquisition that came in at the beginning of quarter strengthened Payments and Financial Services, but equally, has good strength in Other, particularly around mobility. But we are seeing good momentum in that segment. It's one we're particularly excited about.
John E. Cotterell - CEO & Director
The mobility space is really accelerating for us, perhaps not a surprise. A lot of it around last mile deliveries and retailers improving their service to clients. Retail is another area that's been expanding. We've done well out of our understanding of the payments landscape and the impact that can have on retailers. How to help them with frictionless payments or buy now pay later and so on. And then the other strength area in Other has been health, which has moved forward strongly over the last year.
Bryan Connell Keane - Research Analyst
And then just one question on the guidance, Mark. Just thinking about the cadence of the revenue growth. It starts at 56% to 58% growth, and then for the full year, it's 38% to 40%. How much of that is some of the acquisitions run off? Do you have any extra M&A in there from acquisitions not amount or not announced? And then just trying to get a feel, it's still incredibly strong for the year versus the growth of the industry, any thoughts on sustainability of that 38% to 40% growth rate?
Mark S. Thurston - CFO & Director
I mean we're obviously getting a full contribution basically up until we lap the Levvel acquisition, which will be Q3. So expect to see very strong organic constant currency growth to Q3, probably topping off from where we've guided. And then Q4 will be clean, so we don't bake in any anticipated M&A. But certainly, exiting sort of Q4 will be north of that 20% constant currency organic target that we've set ourselves. So the short answer, I guess, to the top end of that 40% is that you'll be seeing organic growth over 30% of that component and the balance will be the M&A contribution.
John E. Cotterell - CEO & Director
So one of the things that you'll be aware of that we're looking for as a business is where technology is driving what we call long wave change, driven by all the digital technologies that are out there. So the industries that we're focused on have all been around where technology is driving significant game-changing structural change in those industries. And those long ways, the example of payments that's been running for 15 years or so, we see that continuing pace for decades looking forward from now.
And then as you get into the other spaces that we're in, banking, insurance, asset and wealth management on the Payments and Financial Services side, the tech arena, particularly the clients in the West Coast, the telco space, the media space and then some of the ones we just touched on in Other around mobility and logistics, health, retail and so on. All of these are going through long wave change. And actually, there's a lot of cross sector convergence happening as well where the ability of technology to integrate through APIs and so on across sectors is transforming business models in the ways in which sectors interact with each other, and we placed ourselves in the center of those.
So sustainability-wise, as touched on a moment ago, it's still, from our point of view, feels like it's accelerating. And not as a long -- not as a short-term blip, but as part of that long-term transformation that's happening across these industries.
Operator
Your next question comes from Jamie Friedman of Susquehanna.
James Eric Friedman - Senior Analyst
Great results here. A couple of questions. John, do you have any perspective yet on next year's IT budgets to start at a very high level? And then I'll ask my follow-up at the same time. In your prepared remarks, John, you mentioned -- I couldn't quite -- it wasn't your fault, it was my fault, but there was something that happened with the top 5 client in payments and fintech vertical. I thought it may have related to an acquisition, if you could elaborate on that one too?
John E. Cotterell - CEO & Director
I'll let Mark look for the second one. I mean the interesting thing about the IT budgets question for us is that a lot of the budget for the work that we do with our clients isn't really coming out of a traditional IT budget framework. It's clients who are looking from a business point of view to create technology product in the market. And that's what's driving their investment cases and the work that they're doing with us. So I'm sure somewhere it links back to the capital spend framework that they have within their organization, but I'm not sure that it links back to IT budgets specifically. Certainly, we don't find ourselves sitting talking about IT budgets with our clients very often.
Mark, have you picked up on the other?
Mark S. Thurston - CFO & Director
I think, Jamie, you are referring to clients who paid us over GBP 5 million rather than top 5. Is that right? And we were talking about increase, we didn't talk about movement in the top 5 clients per se.
James Eric Friedman - Senior Analyst
I thought you had alluded to a fintech that came in or got expanded because of maybe the Five acquisition, one of the acquisitions, but is that too specific? Just maybe more general, John, in your prepared remarks, you talked about the API progression in the payments and fintech space. We usually don't rely on you to -- for some great insights into that end market. So just in general, what are you excited about in the payments world these days?
John E. Cotterell - CEO & Director
So I mean in the payments world, one of the things that's very exciting for us is how it is a door opener into other sectors for us. So for example, as I touched on a moment ago, in retail, helping clients to move towards frictionless payments, being able to walk into a store, pick something up and walk out again or a smoother e-commerce experience or buy now pay later.
What we're finding is that whilst retailers are dependent on the payment providers for the back end processing, they're starting to look to pick up some of that payments ecosystem themselves to create differentiation in the marketplace, to get better information and data on their clients and so on. So we're working directly with retailers on some of those things.
Similarly, in the banking world, the banks are keener to get involved in the payments arena. A lot of that's driven by open banking where their back end capabilities and the open banking regulations allow them to create new products and services that look a little bit different to the traditional payments world, and we're helping a lot of banks with those sorts of things. And there's a lot of industries where micro payments makes a big difference where they want -- you want to collect small amounts of cash from clients and how you do that in a cost-effective way. Subscription models are growing, and that has a big impact on the payments world in the way in which we can help clients to do that. So one of the very exciting areas for us is how payments is pushing into other sectors and helping us open those sectors up. And of course, once we, as touched on, get a good product flying for a client in Other sector, it helps us push into other parts of that business.
Operator
Your next question comes from Maggie Nolan of William Blair.
Margaret Marie Niesen Nolan - Analyst
Congrats on the good results. John, I think you talked about application rationalization and modernization and general architecture reviews. That feels like maybe it is a bit more tied to traditional IT budgets. And I'm curious how Endava is really kind of differentiating from competitors in those areas?
John E. Cotterell - CEO & Director
So that whole arena that I was touching on there is around how the back end is implementing the digital product that we're helping clients to put in place. So essentially, as you take product through that ideation phase into prototypes and into production, you start to really stretch the product into the back end in terms of the added value that you can deliver to clients.
And so that's where we get into these application reviews, architectures and so on is around as the product is being extended into multiple countries, as you're adding functionality and so on and it has success in the market. What do you need to do to your back end to ensure you have continued differentiation in the market that your speed to market isn't being slowed down, and the other points of differentiation functional and so on can actually be added. So that's where we get into the back end.
So we're not just going along to clients and saying, let's do a big architectural study for you in the way many of our competitors would. It's much more driven by our understanding of the product that we're building and what needs to therefore be driven at the back end to enable that to take forward.
Margaret Marie Niesen Nolan - Analyst
And then as you continue to grow in the U.S. and North America, are these clients being won through competitive processes? Are you taking market share from other providers? And are the pricing dynamics any different in that region?
John E. Cotterell - CEO & Director
So the U.S. feels very similar to the other geographies of the business in terms of the way in which we win business. The ideation approach that we take means that we are much more rarely than our competitors getting involved not through an RFP process, but getting involved through an ideation of what a new product or a product enhancement could do for a client. And so we focus on that space, often very small initial engagements then scale as the vision of what can be done, gets the client excited about investing further and then spending money to get that into production environments. That is just as true in the U.S. and the way in which we're expanding in the U.S. as it is in Europe and the U.K. and the rest of the world as we're building out there.
So there isn't any difference. It is across our 3 sectors, so the Payments and Financial Services, TMT and Other. We're seeing activity in all those areas. Health in the U.S. is one which is leading for us really. I think the whole health sector and how technology can be applied is more advanced in our experience in the U.S. in Europe and the U.K. So health is one that's pulling on. Tech is another one where we're working with West Coast businesses where we're seeing a lead out of the U.S. and then that's pulling on the rest of the business in our other geographies.
Operator
Your next question comes from James Faucette of Morgan Stanley.
Jonathan Lee - VP
This is Jonathan on for James. I want to build on some of the pricing questions that have already been asked. How are clients responding to the pricing dynamics you mentioned? Has there been any pushback around pricing increases? And do you envision more clients moving toward fixed outcome contracts?
Mark S. Thurston - CFO & Director
I think our clients understand the wider backdrop that what we do alongside others is special and requires being able to onboard talent, and there is a battle for it. And so whilst nobody likes rate increases as a client, they understand that we are competing in a global market for that talent. And as long as those conversations are sensible and we continue to deliver good outcomes and excellent work for our clients then it isn't usually a difficult conversation. In terms of...
John E. Cotterell - CEO & Director
Just to add to that. I think the key thing with our clients is to be able to demonstrate the value-add to that business that's going to come through the engagement. And because of our approach, which helps to bring to life what the technology is going to do for the business, it really helps clients frame up their business cases. And once we've got a good business case and a good product that's flying, it's a very different discussion around what we all need to do. Sensibly, we need to demonstrate to clients that we are sensibly pricing. But they are much more amenable to that because the route to delivering their outcome is much more strongly visible by staying engaged with Endava. So that's the nature of the conversations we're having. We're not trying to push advisers down our clients' throat without demonstrating value.
Jonathan Lee - VP
And one more if I may. You've highlighted the success at both Five and Levvel, how are you thinking about incremental acquisition? Is there still a focus on expanding U.S.-based capabilities? What else are you looking at? And how is the current landscape and pipeline?
John E. Cotterell - CEO & Director
So I mean, obviously, we've had a very successful mergers with other businesses and Five and Levvel and before that CDS have all gone very well, and we're very pleased with them, actually very excited about those businesses and the value that they add to Endava. We continue to look for the right opportunities. We are very choosy. There's a lot of opportunities out there, but we're very choosy on where we engage. There's nothing to report at the moment. But as soon as there is, we will obviously bring that to the market.
In terms of our strategy, it remains, as I've articulated before, we want to look for businesses that are going to strengthen our geographic diversification. So pushing forward in the U.S., increasingly looking to Asia Pacific to see whether there are good businesses there that will add to the sales teams that we've put on the ground out there. We also look for businesses that are going to accelerate us in the right sectors where we see these long wave opportunities, so businesses that are going to bring know-how and capability in those sectors and help us accelerate. And occasionally, we look for a business that's going to give us some technology capability that we don't have and need quickly. That third is actually quite rare. We're good at building the technology capabilities that we need ourselves, but we do keep an eye out, just in case. And of course, often the deals that we do bring some element of all 3 components of that. So we keep looking. There's a lot out in the market, but we're very choosy.
Operator
No more questions. Presenters, you may continue.
John E. Cotterell - CEO & Director
Thanks for that. Thank you all for joining us today. As you all have noted, demand for our services actually remains very strong. We're seeing good demand in all our verticals and geographies and remain very positive. We're excited about the opportunities that this year offers. Keep well, and we look forward to seeing you at our next earnings call. Thank you.
Operator
This concludes today's conference. Thank you all for joining. Have a great day.