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Operator
Good day ladies and gentlemen, and welcome to the first-quarter 2015 Perficient earnings conference call. My name is Denise, and I will be the operator for today. At this time all participants are in a listen-only mode. Later we will conduct a question-and-answer session. (Operator Instructions). As a reminder, this conference is being recorded for replay purposes. I will now turn the conference over to Mr. Jeff Davis, President and CEO. Please proceed, sir.
Jeff Davis - CEO and President
Thank you, and good morning, everyone. This is Jeff Davis. With me today, of course, is Paul Martin, our CFO. I want to thank you for your time. As is typical, we've got 10 to 15 minutes of prepared comments, and then of course we will open the call up to questions. So again, thank you for joining, appreciate your participation on the call.
A number of factors led to a little lower start to the year than we had hoped for, primarily delayed delivery ramp, so some projects coupled with some items, we expect, are going to be nonrecurring. While revenues came in within the range we provided, they were slightly below the midpoint of the guidance. That coupled with the one-time issues I mentioned resulted in earnings-per-share number on the low end of the range we had modeled.
However, there are many good things happening right now and based on that data we are reaffirming our earnings guidance for the year. First, Q1 bookings were solid and our pipeline is quite large. We're talking to more customers about more opportunities than ever. Additionally, revenue per billable day is ramping meaningfully, and there is a sizable project at a key account that will begin ramping significantly heading into the second half of 2015 that will drive further improvement there. We are talking about RBD in May that 7% or 8% higher than it was in April, and should really scale once the work I just mentioned is fully underway. So March was down on an RBD basis, but April was back up, and May looks to be a significant improvement. And then I think we are sort of on our way for the year.
So on previous calls I mentioned that you are significant ABR improvements in recent years we have been turning our attention more specifically to driving volume growth, and we actually saw some traction there in the first quarter, we are pretty excited about. We had total billable hours flat on an annual basis. As you might recall, most of our growth over the last couple of years has been driven through ABR increases with slightly contracting hours volume. So hours volume has stabilized, were flat, and actually up significantly in the offshore realm. We'll talk about that a little bit later.
As I mentioned before, we are focusing on coupling 4% to 5% annual ABR increases with similar growth in volumes to contribute to margin improvement going forward. And speaking of ABR it remains strong at $149 in the quarter, which is an increase of 4% from the year-ago period.
We are also getting more leverage from our global delivery teams, as I mentioned. 8.5% of revenues in the quarter came from our offshore team versus 2.9% in the year-ago period. Our acquisition of Zeon was, of course, responsible for some of that growth but not all of it. As our customers further understand our value propositions and our differentiated delivery model relative to the pure offshore firms, we are beginning to see benefit and seeing sustainable increased utilization there. In fact, organic offshore revenue was nearly 5% of revenue, reflecting a 64% increase year over year. So from 2.9% of revenue to 5% in the past year, 64% increase. And while the utilization overall was a bit lighter than we had hoped during the quarter, we are confident we will manage it back to our target range of 80% plus for the core business.
We talked about this on our last call but I think it's worth reiterating now more than ever before our customers are reacting to market forces and competitive landscapes, moving faster than ever. All companies are dealing with digital disruption and rising consumer and constituent expectations. So whether it's their end customers' expectation of an efficient and excellent digital experience with their brand or their employees' expectation that their work lives be made easier through technology and business optimization solutions, the mandate is clear. Business and technology are now inextricably linked, and there is a real do or die mentality emerging. Companies know that they must deliver new services and experiences; they must transform and they must optimize if they wish to remain competitive.
Obviously, we see ourselves as very well positioned as this unfolds. Our broad portfolio, deep technology expertise, and cross-platform and industry experience align perfectly with the opportunity. I'll touch on more notable topics and specifically more about digital transformation, and also speak of course to our outlook for the second quarter after Paul speaks in detail about the first-quarter results. Then, as usual, we will open the call up for questions. Paul?
Paul Martin - CFO
Thanks, Jeff. I'm going to cover the Safe Harbor as well as the first-quarter results.
Some of the things we will say, discuss in today's call concerning future Company performance will be forward-looking statements within the meaning of the securities law. Actual results may materially differ from those discussed in those forward-looking statements, and we encourage you to refer to the additional information contained in our SEC filings concerning factors that could cause those results to be different than contemplated in today's discussions.
At times during this call we will refer to adjusted EPS. Our earnings press release includes a reconciliation of certain non-GAAP financial measures to the most directly comparable financial measures prepared in accordance with generally accepted accounting principles, or GAAP. This is posted on our website, www.Perficient.com. We also posted a slide deck which includes a reconciliation of certain non-GAAP goals to the most directly comparable financial measures prepared in accordance with GAAP on our website under investor relations.
Now, let me turn to the first quarter results. Total revenues for the first quarter of 2015 were $110.6 million, a 14% increase over the year-ago quarter. Services revenues were $98.6 million for the first quarter 2015, excluding reimbursable expenses, which represents an 11% increase over the comparable prior-year period. Services gross margin for the first quarter 2015 excluding stock compensation and reimbursable expenses was 36% compared to 36.2% in the first quarter 2014. SG&A expense increased to $24 million in the first quarter 2015, from $20.7 million in the comparable prior year quarter. SG&A as a percentage of revenues increased to 21.7% from 21.3% in the first quarter 2014. EBITDAS for the first quarter 2015 was $15.5 million or 14% of revenues compared to $14 million or 14.4% of revenues in the first quarter 2014 with the decrease primarily due to an increase in benefit cost associated with several large medical related claims.
The first quarter of 2015 included amortization expense of $3.8 million compared to $2.7 million in the comparable prior-year quarter. This increase is primarily associated with the 2014 and 2015 acquisitions. Acquisition costs in the first quarter of 2014 were $1.5 million and related to the acquisition of ForwardThink and BioPharm.
Our effective tax rate for the first quarter 2015 was $34.6 million compared to $42.3 million for the first quarter of 2014. The decrease in the effective rate is primarily due to nonrecurring discrete adjustments recorded during the first quarter 2015 and the first quarter of 2014 which also included the impact of nondeductible transaction costs.
Net income increased 34% to $4.1 million for the first quarter 2015 from $3 million in the first quarter of 2014. Diluted GAAP earnings per share was $0.12 a share for the first quarter of 2015 compared to $0.09 in the first quarter of 2014. Adjusted GAAP earnings-per-share increased to $0.26 assets a share for the first quarter of 2015 from $0.25 in the first quarter of 2014. Adjusted GAAP EPS is defined as GAAP or earnings-per-share plus amortization expense, non-cash stock compensation, transaction costs, and fair value adjustments of consideration -- of contingent consideration net of related taxes as divided by average fully diluted outstanding shares for the period.
Our annual billable headcount at March 31, 2015 was 2,202 including 2,066 billable consultants, which was broken out 1,539 onshore and 527 offshore and 137 subcontractors. [Ending] SG&A headcount was 396.
We ended the first quarter of 2015 with $67.5 million in outstanding debt, up $13.5 million from year-end and $6.4 million in cash and cash equivalents. We funded the cash portion of the purchase price of Zeon Solutions of $22.3 million during the first quarter. As previously disclosed in early January we expanded our line of credit from $90 million to $125 million in conjunction with the Zeon acquisition. Our balance sheet continues to leave us well positioned to execute against our strategic plan. The days sales outstanding on accounts receivable were 76 days at the end of the first quarter compared to 81 days in the fourth quarter of 2014 and 79 days in the first quarter of 2014. I will now turn the call over to Jeff Davis for a little more commentary behind the metrics. Jeff?
Jeff Davis - CEO and President
Thanks, Paul. So in the quarter we closed 38 deals north of $500,000. They averaged $1 million each. That compares to 40 in the fourth quarter averaging $1 million each. And 35 in the first quarter 2014 averaging $1.4 million.
So speaking of large deals, I mentioned earlier that we recently closed first phase of a very large opportunity involving a five-year engagement. And this is relevant, one, because of its size and opportunity, but also because it is delivering a complete digital transformation for a client in the healthcare space. Again, it's a five-year program, and notional budgets for Perficient in that program are $150 million over the five-year period. So, again, we are excited about it because of the size, but more importantly believe it's right in our sweet spot and we are delivering against that digital transformation opportunity.
From an industry perspective, not surprisingly, healthcare and financial services verticals continue to perform very well and steadily. Retail and consumer goods is picking up quite nicely as well -- I've talked about that in the past, where we believed and could see the pipeline improving as we move past some of the hacking incidents and people get back to strategic opportunities, seeing a nice pick up there.
We have talked for several quarters about our continued focus on developing and marketing Perficient-owned IP to our clients. So during the first quarter we realized more than $800,000 in asset sales -- that's in-house developed asset sales -- continue to have a nice pipeline of opportunity there for the remainder of the year.
We are continuing to look to supplement our organic growth with accretive M&A, of course with firms that help deepen our expertise and expand our reach. We'll be looking to add an additional $50 million to $60 million of revenue through two to three more deals in 2015. I anticipate that we will be closing our next opportunity there within the next 90 days.
So moving on to the outlook for the second quarter, Perficient expects its second quarter 2015 services and software revenue including reimbursed expenses to be in the range of $110.5 million to $121 million comprised of $104.5 million to $110 million of revenue from services including reimbursed expenses, and $6 million to $11 million of revenue from sales of software. At the midpoint of the second-quarter 2015 services revenue guidance represents growth of 21% over second-quarter 2014 services revenue.
The Company is narrowing its full-year 2015 revenue guidance range basically to reflect this lighter Q1 and Q2 as well as the mix shift to offshore that I referred to earlier. So, we are adjusting the top end of the range to $495 million for a total range of $470 million to $495 million, but we are reaffirming the adjusted guidance earnings-per-share -- I'm sorry, the guidance for adjusted earnings-per-share that we provided earlier of $1.38 to $1.49. We believe we will be able to still be in that range and, in fact, right around the midpoint of that range due to the fact that we are continuing to expand margins throughout the rest of the year.
So with that, operator, will turn -- open the call for questions please.
Operator
(Operator Instructions). Mayank Tandon, Needham & Company.
Mayank Tandon - Analyst
Good morning. Jeff, thank you for all the details. But I just wanted to get a better grasp of what happened in 1Q. I know you gave guidance in early March. What changed from that period on? And then this delay in business. Do you end up making up for that, or do you think this is lost revenue but some of the other deals that you mentioned could potentially offset the weakness in 1Q?
Jeff Davis - CEO and President
So to the first part of your question, it was March in fact. It really kind of hit after our call. And honestly throughout March. So as I said on the call, January and February were actually off to a good start and up year over year pretty nicely, in terms of the rebound from that seasonal Q4. But March ended up being a lot lighter than we had anticipated and forecasted, in fact even the pipeline represented, and it really was due to just delayed ramps and delayed starts, which began in April but really are hitting in earnest now in May. So we are going to see this dip in March and April, so impacting a little bit of Q2 which is reflected in our guidance. But then a nice rebound in May, and I feel like we've got a solid year ahead.
I don't think we will make of all of that revenue, which is why we dropped the high-end of our guidance range down by $10 million and actually moved -- effectively moving the midpoint down by $5 million. But assuming we are able to hold to that obviously it's about 1% differential from our prior guidance really at the midpoint.
So we feel good about it; like I said, we were a little surprised by the slower starts, the delayed ramp ups. But it's happening now, and in fact bookings are extremely solid. The pipeline is very solid, so even as we've had very, very large bookings over the last couple of months, and already beginning in May and expect May to be another large one, at the same time the pipeline is continuing to rebuild. So, we do believe this was kind of a dip, and I can't explain why -- and it was fairly across the board, so I can't explain why customers were slower to commit and get things ramped up, even where deals were closed. That was what happened and, like I said, we've moved past it now. And I do think our overall guidance range, again, we've only dropped it about $5 million at the midpoint so we still feel good about that.
Mayank Tandon - Analyst
Just to be clear, this was broad-based. Nothing related to a specific vertical or a specific client or clients?
Jeff Davis - CEO and President
No. It was pretty broad-based, which, again, was kind of a surprise to us. It was more kind of macro event from our perspective. We are fairly small. But yes, It was fairly across the board.
Mayank Tandon - Analyst
And then sorry if you already gave this, but I wanted to be clear in terms of what the organic growth was in 1Q in the services business. And can you break that down between the pricing impact and any volume impact?
Jeff Davis - CEO and President
Yes. It was flat. Revenue was flat and actually hours volume were flat. And the difference -- and ABR was up 4%. And the reason we don't see that ABR reflected in the top line is that mix shift that I mentioned to offshore. The offshore business is up 64% year over year from 2.9% to [5.7%].
Mayank Tandon - Analyst
Okay. But then you still expect, if I heard you right, organic growth to improve as the year progresses, and it should be fairly evenly split between some pricing improvements and then of course as you said before, you are emphasizing volume growth this year as well. Is that still on target for improving organic trends?
Jeff Davis - CEO and President
Yes. That's what we expect. I think the midpoint of guidance now for the year is about 4% year over year. I hope that's conservative. I don't want to get you out in front, but, as I said before, we've got beyond the large deal that I specifically raised, and, again, I mostly talk about that because of what it represents in terms of digital transformation, but there is a lot of other things going on around that as well. So I do think there's an opportunity for us to add some upside to that, but we got some work to do. So we're trying to be conservative.
Mayank Tandon - Analyst
Sure. If I could squeeze one more in, I want to better understand the impact to margins from the increased benefit cost. Is that something that was just a one-quarter event that surprised you, and do you expect any of that to linger into the next several quarters?
Jeff Davis - CEO and President
We are self-insured with a stop loss. And unfortunately for the folks involved, we had a number of large claims in the first quarter. It's unusual. Every year we evaluate our plan, we use of third-party, obviously, consultants that -- the industry has fantastic models that are -- this is kind of Six Sigma event basically. So there's no guarantee that it won't repeat, but we certainly don't expect it to. It was an unusual event, and again unfortunately for those involved, but unusual circumstances and it seems highly unlikely it would repeat. So that's on the benefit side. We did also have a little bit of cost around foreign currency as well.
Mayank Tandon - Analyst
Okay.
Jeff Davis - CEO and President
And that is hedged now so that will not repeat.
Mayank Tandon - Analyst
I'm sorry. I'll ask you one more question just to make sure I get the seasonal trends right. Do you expect the result to be more back-end weighted, or will we see -- you've given 2Q guidance, the guidance would imply a pretty strong rebound in 3Q and 4Q. Is that sort of what you expect on a normalized basis, or is there something else impacting the second half as well?
Jeff Davis - CEO and President
No. It is. That's exactly what we expect. When we started the year we talked about the fact that sort of pattern we've seen over the last couple of years, both 2014 and 2013. And again, it's going to be a little more dramatic this year than we had expected, but I still think at -- likewise, I think the ramp up in the second half is even more dramatic than in the past as well. So we certainly see a solid Q2, and I think a very strong outlook for the second half, exactly to your point, which is why we still feel good about lowering that overall top-line guidance by only about $5 million.
Mayank Tandon - Analyst
Thank you, I imagine today is a good buying opportunity for your buyback.
Jeff Davis - CEO and President
We'll be in there doing that, exactly.
Mayank Tandon - Analyst
Great, thank you.
Operator
Frank Atkins, SunTrust.
Frank Atkins - Analyst
Thanks so much for taking my question. First question is kind of on the human capital side. What are you seeing in terms of the attrition environment, and hiring out there? And what is your plans for headcount growth, both onshore as well as offshore, and how that impacts the mix going forward?
Jeff Davis - CEO and President
Sure. Onshore I think the market is tightening some. We've always had decent success, though, at recruiting, and the fact of the matter is right now we are not going to be doing a lot of incremental hiring, because we want our utilization to come up three or four points anyway -- which actually has is in a good position relative to any challenge in the recruiting front. But despite that, we've had great success hiring some tremendous talent actually away from a lot of our competitors in the last year or two. Offshore, similarly. We've had great success there, both in hiring and actually pretty -- very low attrition, I would say, relative to others in India and even in China. Overall attrition is a little over 20%, probably right around the industry average. We like it below 20%, our target is probably 17%, 18%. But again, right now we are sort of okay with that because we need to get utilization up. I don't expect that we will be doing much incremental hiring probably until the third quarter. Nothing meaningful anyway.
Frank Atkins - Analyst
Okay. And some of the larger competitors are talking more about investments and moving into what they view as opportunities in the healthcare space. Have you seen any changes on your end in terms of the competitive landscape in healthcare?
Jeff Davis - CEO and President
It's the same players; they're certainly getting more aggressive. And specifically I'm thinking of IBM, GBS, and Accenture. But we have fared very nicely, and we gone up against both of those guys three or four times here in the last six months and won every one. So in fact, they both have approached us about partnering. So we fare well there. And so, no new entrants by the way in terms of new players so much as just those guys getting more aggressive.
I think we have a strong advantage there in one, our delivery model, the way we partner with our clients, the value proposition we offer literally just the rate differential between us and the competitors. But beyond that we've got some incredible domain expertise that we have developed over the last three or four or five years. And the asset we've talked about many times has emerged as a key differentiator for us as well. We've got so much knowledge around that. We sell it in the $300,000 to $500,000 range and it represents about $2 million to $3 million of consulting effort. So it's a real accelerator for our clients, and, again, is a real differentiator for us.
Frank Atkins - Analyst
And can you talk a little bit about your view as to the internally generated software sales throughout the year? What are you thinking in terms of your guidance?
Jeff Davis - CEO and President
You know, I will tell you that we have really none baked into the guidance. I have never really baked that in there, because it can be lumpy. But as I mentioned in the prepared comments, about $800,000 closed in the first quarter. We've got pipeline for the rest of the year I would estimate about $2 million, maybe a little more. We'll win some of those, we may lose some, although our win rate has been phenomenally high over the last six months or so, as I've mentioned. So, a couple million dollars at the higher end, probably for this year. But keep in mind that that represents probably about $20 million in services wrapped in with those.
Frank Atkins - Analyst
Great, thank you very much.
Operator
Brian Kinstlinger, Maxim.
Brian Kinstlinger - Analyst
Hi, good morning, guys. The first question, I'm curious about the large win you have highlighted a few times in healthcare. Was that with a new or existing customer, and is it a payor or provider, please?
Jeff Davis - CEO and President
It's really both. They are more on the provider side, but they have a payor plan. It's a large, very large player in the space, and they have been a client for several years, many years actually. We've worked with this company since really before the time we formed our healthcare vertical. It was one of the catalysts that helped us do that. Though the relationship has grown -- has had its ups and downs, as their budgets have increased and contracted, but right now it's been on an upswing for the past year or so. And again, they are embarking on and have approved via their board a substantial capital expenditure investment, again, around the total digital transformation. So, we are one of I believe three players in that, but are slated for a significant jump as I mentioned.
Brian Kinstlinger - Analyst
Everyone talked about digital transformation, and obviously it's an important trend. Can you talk about maybe specifically your role in this so we can understand the services you are providing for this digital transformation at a high level?
Jeff Davis - CEO and President
Interestingly Brian, and this is true, almost everything we do you could put under that umbrella. And I'm not going to do that. But digital transformation obviously involves social collaboration, a lot of customer facing applications, mobility, and underlying all that though is analytics and integration. And as you well know as you've been following us for a long time, Brian, those are all in our wheelhouse. All of those things I just mentioned are right in our sweet spot. So it's really about the customers -- our customer's customer. And delivering that end-to-end experience, whether it's via call-center, whether it's an online interaction, or whether it's an experience within the brick-and-mortar walls. And driving consistency and a positive experience there. And everything that touches the customer honestly through any device.
And again, I can't imagine something that we are better suited for than that, including, by the way, particularly with the recent acquisition of Zeon, but even before that, the creative capability that we have, because, again, a lot of this involves things that are facing -- our customer's customer facing. And so that's what we see. You think about in healthcare, a quick example is managed care. It emails, contact, interaction with the patient, reminding them to take their medication. That could be something that comes in the mail; it could be something that comes on the phone. And that's where the world is headed and in the case of healthcare that's what these guys are developing.
Brian Kinstlinger - Analyst
Great. And then can you talk about the ramp up? Has begun to ramp? Is that the customer that didn't ramp is expected and when you might see steady-state for this large customer?
Jeff Davis - CEO and President
There was not one of the ones I was referring to in terms the slower ramp. It is starting now. We expect that by the end of this quarter we will have a pretty substantial contingent engaged in those projects under that digital transformation program. But you know, the pace is uncertain right now as the client has to get ready. They are on boarding a number of consultants, including a number of our guys, and obviously everything has to be managed, coordinated; there's logistics involved. The real ramp in earnest begins in the third quarter.
Brian Kinstlinger - Analyst
And then I'm curious, broad question and then with this contract alone, I'm curious your targets over the next two to three years of offshore delivery mix. And then for this large customer, have the added an offshore player, or will you have any offshore presence, or is it all on site for you?
Jeff Davis - CEO and President
That's a great question. These guys have an offshore player, and that's not unusual in our environment. Big offshore guys out there, we all know who they are, that have kind of locked up the offshore relationships at these large accounts. And so, we often are working side-by-side with them, we are doing onshore component or, more frankly, of the heavy lifting and less of the commoditized work, where they are doing more of that. However, I do think there is a longer -- what we've experienced also is that our relationship has grown, particularly with some of these larger relationships that we have, they have turned more and more to us for our offshore capability. We typically have sold that as project-based, and it still is. It's a higher-end service than some of the commoditized services our competitors offer. But we have unseated and begun to see more and more. And that's where you see some of that offshore revenue growth coming from actually unseating some of these large players like Cognizant specifically -- a situation I can think of where we completely unseated them at one of our large healthcare accounts.
As our relationship has improved and as the strategic nature of our partnership is more -- has built more loyalty and trust, we are actually having the opportunity to unseat some of those guys. So I think we will see more of that, and I'm pleased to see it. It's been a long time coming I think in our ability to drive more offshore, and I am pleased to see it because I think that while the margins are great, we're going to run 50%-plus, probably 60% gross margin on offshore. Of course, the dollars are lower but I also believe those dollars are incremental. And that's business we wouldn't have gotten otherwise. So it's great to see.
Brian Kinstlinger - Analyst
And then you mentioned solid bookings in the quarter. If you listen to other players, it generally hasn't been a great contract award environment for you as customers anyway. So I'm wondering if you can provide some detail around what drove that. Was it this large customer that predominantly led to this strong contract awards or was it really broad-based that your contract awards were solid?
Jeff Davis - CEO and President
It was broad-based. And it came a little later than we wanted but it was broad-based, and in fact actually this customer wasn't in Q1. This deal closed just in May. So -- or late April. So it was across the board. It seems -- I can't necessarily put my finger on it. It seems like things were a little pent up in the beginning, and then, I'd describe, at least for us, almost kind of a watershed event here. More -- beginning in March but even more in April. April was a monster bookings month for April. It's usually not a big month and it was very big on the heels of a big March. So it seems -- and I can't pinpoint why that timing was the way it was because was fairly broad-based. But it sure seems like things have loosened up now. And again, some really solid results.
Brian Kinstlinger - Analyst
Last question I've got is industry based. Clearly healthcare is going to be a driver, you got this large contract, you've got, I'm sure, others in your Hopper. Where else should we expect over the next four to eight quarters to see strength based on your pipeline and maybe where are there other areas of weakness? Maybe energy, I don't know, [with probably] some other IT services players, if you could give some comments on that. Thanks so much.
Jeff Davis - CEO and President
That's great. I think we're going to see healthcare continue to be the leader in terms of growth here. Financial services I think will continue to be strong, but I would describe it more as steady than rapid growth. But I think will see some growth there. But absolutely I think retail and CPG, our consumer markets as we call it collectively, we are very excited about it. And we are seeing a lot of opportunity there, a lot of activity.
In fact, I'll tell you we've got another client that we are engaged with where we've got another great opportunity, in this case it's retail, to be the partner of choice for digital transformation for this organization. I'm talking about next generation commerce, customer 360, this is an organization that happens to have brick-and-mortar as well, so it's a lot of integration. And we are excited about that. But we are seeing more and more of those kinds of opportunities in that space.
Energy, I hear you and I know the state of the industry. However, we believe that we have got some significant opportunity there as well, just simply because we are positioned there, not only geographically but we've already got clients in the space. And we've added some key talent in that space as well that we are investing in. And for us to move the meter doesn't take a lot. So I could see where some of the big guys -- I'm sure are seeing a little bit of a pinch in energy. We are optimistic that we will be able to carve out and actually take some share.
Brian Kinstlinger - Analyst
Great, thank you.
Operator
Peter Heckmann, Avondale.
Peter Heckmann - Analyst
Good morning, gentlemen. Most of my questions have been answered. I wanted to see if you could comment -- I missed the first few minutes of the call, on offshore headcount almost doubling in the quarter. How much of that came from acquisitions?
Jeff Davis - CEO and President
What I referred to on -- I'm sorry, yes. A chunk of -- we went from 2.9% of revenue to 8.5% of revenue, but 4.7% of that is actually organic.
Paul Martin - CFO
So the actual headcount numbers, we had 265 offshore at the end of Q4, and that's up to 527 at the end of Q1, including 239 that came via the Zeon acquisition.
Peter Heckmann - Analyst
Okay. Great, okay. Thank you. And then any impact yet in the marketplace from Cognizant's acquisition of TriZetto? Do you see opportunities there? Do you see either opportunities for hiring or opportunities where a customer is looking to second source and this opens up a slot for you?
Jeff Davis - CEO and President
Yes. Certainly. Actually one of the customers that I alluded to and one of the offshore guys who we've unseated that I alluded to earlier, it was related exactly to the acquisition of TriZetto by Cognizant. I do think it creates a conflict for them and some of their clients within healthcare. And so, I do see an opportunity and ongoing opportunity there for us to take share from them as clients are uncomfortable with them being sort of no longer agnostic. So we see that opportunity. In terms of a hiring opportunity, I'm not certain of that. I have a ton of respect for Cognizant, and I don't know what kind of folks might be there that we could nab but we certainly look to do that as well.
Peter Heckmann - Analyst
That's helpful. And then I don't know if you commented on it, but we had talked about the change in the compensation plan for the salesforce that started rolling out in August. If you haven't spoken on yet, can you comment about how it's working here six to nine months in?
Jeff Davis - CEO and President
I think it's still a little early to sort of declare. However, I don't think the stabilization, what I anticipate will begin to be growth in hours of volume is completely coincidental. I do think it was related to some of the changes we made in that plan. So I'm optimistic that we will get to that level of volume growth that we've talked about. I think conservatively, 4% to 5% volume growth coupled with 4% to 5% rate growth is what we are trying to drive. And I think we can get there. Like I said I think this first step, this first sign in the first quarter of hours not contracting is a good sign and a good start. And again I can't -- I wouldn't say it's not at all related to the plan, I'm sure the plan had some effect. But I think more frankly the second half of the year, Pete, we will be in a better position to assess how effectively or not that's working.
Peter Heckmann - Analyst
Fair enough, thanks.
Operator
We have no further questions. I will now turn the call back over to Mr. Jeff Davis, President and CEO, for any closing remarks. Please proceed, sir.
Jeff Davis - CEO and President
Thank you all again for your time today, we appreciate it. We look forward to seeing you in another quarter area with more good news. Thank you.
Operator
This concludes today's conference. You may now disconnect. Have a great day, everyone.