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Operator
Good morning, and welcome to the MidWestOne Fourth Quarter 2017 Earnings Conference Call. (Operator Instructions) Please note, this event is being recorded. I would now like to turn the conference over to Charles Funk, President and CEO. Please go ahead, sir.
Charles N. Funk - President, CEO & Director
Thank you very much, Chad, and good morning or good afternoon to everyone, and thank you for joining us on the call. Let me begin with reminding you that this presentation contains forward-looking statements relating to the financial condition, results of operations and business of MidWestOne Financial Group Inc.
Forward-looking statements generally include words such as believes, expects, anticipates and other similar expressions. Actual results could differ materially from those indicated. Among the important factors that could cause actual results to differ materially are interest rates, changes in the mix of the company's business, competitive pressures, general economic conditions and the risk factors detailed in the company's periodic reports and registration statements filed with the SEC. MOFG undertakes no obligation to publicly revise or update these forward-looking statements to reflect events or circumstances after the date of this presentation.
So thank you again for joining us, and let's begin straight away with credit, which was the big story of this past quarter. And I just have to simply say that we have no excuses to account for the 2 loans that created our credit surprises in the third and fourth quarters. We know shareholders have high expectations, and our expectations internally are even higher.
I think the important thing here is how we react to what has happened, and we are certainly focused on the road ahead of us. As such, we have already instituted a number of changes to our credit administration process, and I really think these changes will make a repeat performance much, much less likely in the future. I think it's very important to learn from one's mistakes, and I assure everyone we have learned. But the proof will be in the execution the next few quarters, and I'm very optimistic that we will put this behind us.
In regard to the large Iowa credit that resulted in the pre-announcement that we issued just before Christmas, let me give you a brief update. We think that by the end of the second quarter, there will be resolution to this credit or there will be foreclosure. We think we're properly marked at this time. And one of the things -- we probably should have indicated this in the release but didn't. The $5 million increase in the nonaccrual loans came from putting their line of credit on nonaccrual. And again, in retrospect, I wish we would have announced that in the fourth quarter but we didn't.
We also have, in the -- if you look at the nonperforming section, we have a $3 million TDR that's in one of our Iowa communities. And quite frankly, this TDR does not cause us undue concern, and we think that it's more than likely that once they "get out of TDR jail", that they will be back on a performing status within the year -- within a year, certainly. Again, we don't see any undue concern on this credit but because of the accounting rules, it is classified as a TDR.
We are well into the renewal season for ag borrowers. I would say we are beyond the 50% mark for renewals. And I think the headline on that is not really much different than what I've been saying for the past 6 months. And that is I think we will be adding to our reserves, but we don't expect significant charge-offs in our ag portfolio. Collateral margins remain decent on most credits, and I will give you some numbers.
The first number I would give you is that if you look at the entire agricultural portfolio, which is roughly 10% of our loans, 15% are in the watch category, 5% are in substandard. So 20% of the entire ag portfolio is rated either watch or substandard. If you look at the entire portfolio for the whole bank, 30% of our watch credits are ag, 15% of the substandard credits are ag and -- so you can see that it only represents 10% of our portfolio but they do have elevated credit issues. Again, we don't expect a lot of charge-offs.
Most borrowers are being very cooperative, and I can tell you that when you have difficult economic situations, if the borrowers are cooperative, that is a huge positive. People ask about land prices, and the most recent data we have for land prices in Iowa for the whole state is that land prices were up about 3% over the past 12 months. My personal opinion on land prices is that ultimately, they follow interest rates. So I think land prices, if we did see a sharp increase, especially in intermediate and long-term interest rates, that would affect land prices in a negative way. But so far, very, very stable land prices.
The -- if you look at our footprint, the toughest ag conditions are in Southern Iowa. Southern Iowa only represents 5% of our ag portfolio, which is another way of saying that 95% of our ag portfolio saw pretty good conditions this year in terms of yields. So again, the headline is that we are going to be adding to our reserves because we're increasing watch and substandard loans in our ag portfolio, but we do not continue to not expect large charge-offs in that portfolio.
For those who might be wondering, we have about $5 million in our budget for the provision for 2018, and we think that will cover our charge-offs and loan growth in our loan portfolio.
As I have said many times inside the walls of MidWestOne, that this is my 38th year in banking. And when you have credit issues in your company, it dwarfs everything else. But I think it is important to say and to recognize that we had a lot of positive things happen in our company in 2017. And so let me review both the fourth quarter and 2017 from that perspective.
Our top line revenue growth was just over 4.5%, and that came despite a drop from mortgage. Our mortgage, we're very pleased with our mortgage area, but as most people realize, it was a down year for mortgage due to lesser refinance activity. Loan growth for the year, up 5% -- just over 5.5%. That's the best loan growth we've had in a long time. In the fourth quarter, it was much like the second quarter, much of the loan growth came in the last 15 days of the calendar year, so the quarter averages won't reflect the strong performance we had. And we -- I checked this morning, and we are right at $2.3 billion in loans right now. So we've continued to see an increase into the new year.
In terms of specific geographies, and this is in no particular order, I just kind of wrote it down. Denver ended the year with $48.5 million, almost all of that is in C&I loans. Florida had very, very good growth. They're up to $148 million as of year-end in their loan portfolio. They had strong commercial real estate growth, especially. More than $60 million of growth from the Twin Cities markets, and that includes Western Wisconsin. The Iowa footprint was down modestly in terms of its loan totals during the year and it all added up to 5.6%, which we're very pleased about.
Deposits, we got some seasonal inflows but also some strong successes during the fourth quarter, up 5% for the year. Most offices in the footprint showed increases in deposits. Iowa City, very, very strong. One of the things that might be a little surprising is that rural Iowa and Western Wisconsin, which tends to be a little more rural, had very, very strong deposit performance. The Twin Cities footprint, and I'm aggregating here, look to be right around 5% and I think there's even more potential, but very good performance from the Twin Cities footprint. And our Florida operations are now over $100 million in deposits, and they were right around $80 million when we announced our merger so they've continued to see nice deposit growth in Florida. I will say that we've had some seasonal outflow since year-end. We're down about $30 million in deposits and most of that is entirely due to seasonality.
Wealth management, strong year, up 11% in top line revenues. Our insurance agency is the smallest component of the wealth management. They had a onetime item or 2 in 2017 so they probably will not repeat their very strong performance. Trust and investment services are the bulk of our wealth management, and we think that they will continue to see nice growth into 2018. I do think that to get above-average growth in this area is going to depend on hiring new producers, and I'll talk a little bit more about that toward the end of this call.
A few comments about the Home Mortgage center. I've talked about our inability in the past to execute in this area of our bank. Very, very good progress. To give you one example of the progress, 6 months ago, we were taking more than 2 months to close our 1-to-4 family loans. We're down to under 50 days now and on our way to a goal of between 40 and 45 days to close 1-to-4 family.
We've had -- we've shown an ability to attract producers to our company, good producers who are team players. We're, I think, targeting Florida to add a producer or 2, and I think in the next 90 days, we'll probably be successful in that endeavor.
And we continue to build our servicing portfolio. Our servicing portfolio ended the year at $288 million, which is up from about $250 million around a year ago. In terms of expenses, expenses have jumped around a little bit. We did accelerate some expenses into the fourth quarter due to the tax bill. And just in round terms, I would say that accounted for about $0.01 a share in terms of accelerating expenses.
We also -- our expense rate -- run rate looks a little higher from the third quarter to the fourth quarter. What I just talked about would be one reason, but also, we had a onetime reversal on expenses in the other expense category in quarter 3 that the next quarter 4 look a little higher in other expenses. But quarter 4 run rate is probably closer to the true run rate.
In terms of efficiency ratio, I think it's fair to say that our efficiency ratio went up a little bit. And we could see that rise a little bit in 2018. Some of that depends on the net interest margin. But I think our expense control is good. What we found going through the budget process is that we do have a commitment to fintech, but fintech is expensive. And I'll talk a little bit more about that in a minute. But we know we have to invest in our future, and fintech is, we think, a big part of our future.
Also, a few random notes. The hiring of David Lindstrom, which was, I think, publicized. But David came on and was working as the Minneapolis President, West Minneapolis President for a large banking company in the Twin Cities. David is Senior Vice President and head of our Retail Banking operation. He's been here a couple of weeks. He's been very warmly and well received throughout the company. And we think David will be a key part of above-average revenue generation going forward.
We do have an active CFO search underway. There's been a lot of interest in that, and I have every confidence that within the next 90 days, we should be able to announce a very, very good and qualified candidate to come onboard. But again, we've been very pleased with the caliber of candidates we've seen.
In terms of capital, I think we sit in a good place on capital. The dividend increase, I think, reflects the board's confidence and management's confidence in our future, and specifically 2018 prospects. As far as 2018, we expect loan growth to be 5% to 6%. It's going to be driven by the same players that have driven loan growth in the past: Denver, Southwest Florida, the Twin Cities, and we think that Iowa City will have a much better performance in terms of 2018 loan growth than was the case in 2017.
I would use the same targets for deposit growth. And I think one of the things that's very critical is that we have buy-in throughout our footprint in terms of the importance of deposits, and especially in 2018. Because in 2018, we think that deposits are going to be ever tougher to acquire as bank loan-to-deposit ratios continue to go up.
People are going to ask about the beta. And I just put question marks after the beta. I can say that we are paying market rates for larger amounts of money now, and we've negotiated those rates with a fair amount of customers. And I think that would not be inconsistent with others in our industry.
I think we are close, in our company, to showing some increases in some of our core rates. We're not quite there yet but I think we're closer. So we -- I think all of that comes down to a conclusion that we are somewhat cautious on the margin, and that is entirely due to the fact we think the time is almost at hand to start moving some of our core rates.
One thing that -- we are actively looking for proven revenue generators, not just in the bank but in our mortgage area, as I said before, and also in our wealth management area. Acquisitions, we had discussions -- a number of discussions in the latter part of 2017. We did walk away -- jointly walk away from one opportunity late in the year. Things seemed to slow down over Christmas and into January, but we do think that there will be some more discussions as we go forward into 2018. Certainly, nothing is imminent.
And we also have a few wealth management opportunities, small, not large, but small, that we will be exploring as we speak, really. And I do think that in our wealth management area, we're going to have to bring on more producers to continue to show above-average revenue growth.
I'd like to end my portion of the comments by talking a little bit about the tax cut. We think that about 1/2 of the benefit of the tax cut will flow to our bottom line. We did make an increased contribution in our company to the MidWestOne Foundation as our gesture of a way to give back to our communities.
We did put another $500,000 into our fintech initiatives. As I said, we went through the budget process and had to cut a few things out. So we restored that as a way to invest in our future with increased fintech spending.
And then we just have a previous position that capitalism is going to work its wonders, and that we're going to see increased pressure for loans and deposits as folks have lower marginal tax rates. And we also think that will extend into the personnel area as well, especially with top-performing employees. So we're very, very cautious, and we've made some assumptions relative to margin and personnel expense. But overall, we think that about half of the tax cut, roughly $2 million, will come to the bottom line. Could be better than that, could be slightly worse, but we'll have to see how the year goes.
So I will return to where I started. We recognize that our credit performance has to improve, and I truly believe that it will. 2017 had a lot of things go right, but credit dwarfed many of those good things. But I do think it's important to recognize many of the positive things that went on that set us up for good performance in the future.
So Chad, with that, I will send it back to you. I did not say who is in the room, but we have Jim Cantrell, our Chief Investment Officer and Interim CFO; Kevin Kramer, our Chief Operating Officer; and Kent Jehle, our Chief Credit Officer. And we would be happy to take any questions you might have.
Operator
(Operator Instructions) The first question will come from Jeff Rulis with D.A. Davidson.
Jeffrey Allen Rulis - Senior VP & Senior Research Analyst
I guess, Charlie, I want to follow up with your comment on the provision expectations for '18. Was that, I guess, $1.2 million or $1.3 million quarterly or $5 million annually? Is that kind of what you had mentioned?
Charles N. Funk - President, CEO & Director
$5 million annually, $1,250,000 per quarter.
Jeffrey Allen Rulis - Senior VP & Senior Research Analyst
Got it, great. And then on the -- I guess, your margin outlook, Charlie, you kind of mentioned some cautiousness, and particularly we could be looking at the funding side. Maybe the outlook on margin, just a little more detail about the balance of the year, what you think you'll see?
Charles N. Funk - President, CEO & Director
Yes. And I also -- the accretion, we're going to have less accretion come into the margin, which is a part of that. But I'll let Jim Cantrell take the bulk of this one, Jeff.
James M. Cantrell - CIO, VP & Treasurer
Yes, there are a couple things right off the bat that I would mention on margin next year, some of which are not really operating [in] because of the lower tax rate, and we do have some tax-exempt income. We think that alone, because margin is calculated on an FTE basis, that alone could cause us to lose about 6 basis points on the margin. Charlie mentioned the purchase accounting. We do have -- we have loans on the books at a discount. We think we will see a reduction in the purchase accounting accretion of about $1.8 million. I mean, so that's not an insignificant -- so those are kind of 2 significant headwinds that we have on the margin. If otherwise I look at loan yields, we had a slight downtick in the fourth quarter for loan yields, a little unusual. We did get a Fed increase here in December, not all of that, obviously, a very small percentage of that got into the income statement in the fourth quarter. I'd expect maybe a little bump because of that in the first quarter of '18. But as Charlie alluded to, boy, we're on a -- it just feels like -- we saw a little bit of an acceleration in our cost of funds. We are doing some exception pricing. We're probably pricing some of the larger deposits at a higher rate. We did increase the rate on one of our -- our suite retail product, which is a product that's available to large depositors. There's 40 basis points that came in right at the end of the quarter that will flow through now into the first quarter. So there's a couple of items right there that give me some pause. So I think those are the reasons we feel like we're a little cautious on the margin.
Jeffrey Allen Rulis - Senior VP & Senior Research Analyst
Jim, if I could follow up. What was the accretion benefit by basis point this quarter versus last?
James M. Cantrell - CIO, VP & Treasurer
Yes, let's see. I get -- accretion in the fourth quarter was worth, on the loan balance, not on the margin, on the loan balance, the accretion was about 19 basis points this quarter, 23 basis points -- so we saw a reduction of about $115,000 translates into, on an annualized basis, roughly what I'd say, 4 basis points in loan yield. Less than that on the margin.
Jeffrey Allen Rulis - Senior VP & Senior Research Analyst
Okay, fair enough. And maybe one last one, just the effective tax rate expectation for '18.
James M. Cantrell - CIO, VP & Treasurer
Yes, I thought I might get this question. I think prior to the tax reform, our marginal tax rate -- effective tax rate was in the low-30s, 31%. We think with now the 21% marginal tax rate, we think our all-in -- state and local all-in marginal tax rate is going to be in that right around 21% when all is said and done as we move forward. I think the one thing that might affect that going forward, we are finding tax-exempt assets, municipals less attractive. We may, over the course of the year and several years, decrease the amount of tax-exempt income we have, which might raise that rate a little bit over time, but that's a real slow process, I think.
Operator
The next question comes from Andrew Liesch with Sandler O'Neill.
Andrew Brian Liesch - MD
Charlie, your comments related to loan growth, beyond just seeing what the balance is here just today at $2.3 billion, what else are you seeing in your markets to give you that optimism for loan growth going forward?
Charles N. Funk - President, CEO & Director
Those -- I'll let Kevin Kramer amplify if I leave anything out, but there continues to be very, very good activity out of our Denver office. We've got a couple of nice opportunities that may not have been approved yet in Florida that are coming onboard. And quite frankly, the Twin Cities market looks pretty good. And I think there will be some activity in Iowa, specifically Iowa City, over the first 6 months that might help. I don't know, Kevin, if you want to add to that.
Kevin E. Kramer - COO
No. I think Charlie, for the most part, you did hit it on the head. We do expect Iowa City to have a stronger year in 2018 than they did in 2017 in terms of new production. We'll have a full year run rate in Denver. And we did notice in Florida that we did see, especially in the second half of the year, a much better pipeline, stronger pipelines going into 2018, so that's been stronger. Minneapolis, the Twin Cities, we've done a little bit of restructuring to put the leadership and the bankers in the right structure going forward. So we believe just a few structure changes in that market will help us. They had a strong year in 2017. We expect that streak to continue in 2018.
Charles N. Funk - President, CEO & Director
And I would add, Andrew, that we did finally, after almost a year, we were able to find what we think is a very good SBA lender in our Denver market. And when we went to Denver, we thought that SBA would be one of our good opportunities. And it took us a while to find the right person, but we think that has a lot of potential as well. So you add all that up and we think, as long as the economy stays good, we think we probably can do this.
Andrew Brian Liesch - MD
Okay. And this all sounds positive. So last year, loan growth was 5% to 6%, right in the middle there. So as you say, like with Denver on for the full year, Florida is doing well and Minnesota's got opportunities to do better or to be more streamlined. Iowa's doing well. Why isn't -- why wouldn't you expect growth to be even better than last year?
Charles N. Funk - President, CEO & Director
Well, I think you still have to look at the fact that roughly 35% of our footprint has challenged economic conditions. And you may see a little bit of runoff in those communities. You may not either, but that's not our hope. But I think it would reflect some cautiousness on our part. But we feel pretty good about being able to deliver 5% to 6%. Your question is well taken, it's a good one, however.
Andrew Brian Liesch - MD
Okay. And then just with the $500,000 for the fintech initiatives, is that going to just be blended over the course of this year? Is it going to be upfront? Just kind of curious how that's going to hit the expense base.
Charles N. Funk - President, CEO & Director
I think -- and let me just say, we're contributing more than $500,000. We threw an extra $500,000 in. But I would say that you can probably just level that out over the year. I was very clear with our head of IT who's leading the fintech initiative, don't spend all this money in the first quarter, and he won't. So I would say, equally dispersed over the year.
Operator
The next question will come from Damon DelMonte with KBW.
Damon Paul DelMonte - SVP and Director
Just to kind of follow up on that last question by Andrew with regard to the fintech spending and kind of how that plays into the overall expense base. Could you give some parameters around what you would expect for our quarterly run rate during '18?
James M. Cantrell - CIO, VP & Treasurer
Okay, this is Jim. And I was kind of looking at the -- I've been looking at where we wound up in the fourth quarter in terms of both noninterest income and on the expense side. Just total line numbers, I'm looking at probably a small improvement over fourth quarter run rate. And again, I'm looking at total noninterest expense here. Some of the line items will shift around a little bit. As Charlie mentioned, we had, I think -- the fourth quarter is probably a better representative -- it's a better representation of our run rate than the third quarter where we had some onetime, friendly events that kind of dominated the income statement. So that's not real specific as to the -- where the fintech spending is going to be but it's a little guidance on the overall expense level of the company.
Charles N. Funk - President, CEO & Director
Yes. And don't forget, we do have salary increases in the first quarter so you get a little bit of a bump for that. And we should be in the 3% range, give or take, for salaries and benefits in terms of an increase.
Damon Paul DelMonte - SVP and Director
Okay. And then again, the additional fintech spending would be about $0.5 million spread out throughout the year?
James M. Cantrell - CIO, VP & Treasurer
Yes. And I would say the run rate -- I would look at the fourth quarter and say the run rate may be around there, maybe even a little better, including the fintech. So I wouldn't add that to your model. I wouldn't add necessarily the $500,000 for the year to the model. I'd look at the fourth quarter and I'd say we maybe could incorporate the $500,000 and be flat to maybe possibly even do a little bit better than fourth quarter of 2017.
Damon Paul DelMonte - SVP and Director
Okay. So if you add that, call it, $20.1 million in the fourth quarter and then you have a roughly 3% increase in salaries and then you have the fintech coming in at some point, do you have other expense initiatives or something in the background that could be offsetting that growth?
James M. Cantrell - CIO, VP & Treasurer
We do. I mean, there are some offsets elsewhere. We have a benefits offset to some of that. And so yes, what I'm giving you is the total all-out number. And there are some moving parts, without getting into too much detail. But yes, we do have some offsets to the increases, the salary increase. We may be down in number of people even though everybody who's here is going to get a, on average, 3% increase. So bottom line number, we feel pretty good about not moving up from the fourth quarter level.
Damon Paul DelMonte - SVP and Director
Okay, that's fair enough. That's really good color. And then with regards to the provisioning, Charlie, you had mentioned that you're probably going to have to allocate some more dollars to the ag component of the -- of your reserves, which, obviously, would come in through the way of provisioning. Is that included in the $5 million guidance for the year or is that in addition to that?
Charles N. Funk - President, CEO & Director
No, that's included. We anticipated that.
Damon Paul DelMonte - SVP and Director
Okay, great. And then, I guess, just my last question. I think you kind of touched on this in your commentary on M&A. You talked about maybe adding some depth to your wealth management platform and you talked about hiring some folks. Are you open to doing a business acquisition or is it more about just acquiring individual talent?
Charles N. Funk - President, CEO & Director
Both.
Damon Paul DelMonte - SVP and Director
Both. Okay.
Operator
The next question will be from Nathan Race of Piper Jaffray.
Nathan James Race - VP & Senior Research Analyst
I wanted to continue on the discussion on loan growth for 2018. And Charlie, I appreciate all your comments around the softness in the ag space, which is really driving some other kind of tepidness within those regions. But just curious, is the softness that you've seen in ag, is that mainly driving your concern in terms of loan growth for 2018? And just any expectations for overall ag growth this year as you kind of continue to work with some borrowers that could be somewhat stressed in the current environment?
Charles N. Funk - President, CEO & Director
I think the -- probably the most realistic scenario is flat. There are a few business development efforts going on inside the ag space. But to be honest with you, you're going to be -- some borrowers aren't going to get any new credit, some we're going to be working out of. And our better customers continue to be called on by other banks because they're very strong. So I think the best, when you net all that out, if you were flat in those communities, that'd probably be a pretty good performance in 2018.
Nathan James Race - VP & Senior Research Analyst
Yes, that's makes sense. All my other questions have already been answered.
Charles N. Funk - President, CEO & Director
Thank you. Let me just add one thing to Jim's prior comment on expenses. Let me go back to what I said and say that in the fourth quarter, we had accelerated some expenses due to the tax change. So our run rate went up in the fourth quarter for that reason, and that's why Jim says that you could probably carry that on into the new year. That might be another way to look at Damon's question. So I would add to that.
Operator
(Operator Instructions) Our next question comes from Brian Martin with FIG Partners.
Brian Joseph Martin - VP & Research Analyst
So just a couple follow-ups. Maybe, Jim, I guess, if you can give a little context around -- I guess I appreciate the comment on the margin. But just the -- can you talk about maybe where the starting point is with the adjustments, A, the rate hike in December; and B, kind of the tax change to the -- where you think the core margin at least sets up for first quarter, and then we can kind of make some assumptions from there? But just kind of where -- what do you have the core margin at in the fourth quarter? And just kind of an estimation or kind of a guide -- some type of guidepost as to how we should think about where it starts the first quarter?
James M. Cantrell - CIO, VP & Treasurer
Yes. Thank you. I'm flipping through my -- I just want to make sure I'm starting at the right point. I think what I remember, yes, we've got 3.77% posted for fourth quarter here. And that is a good starting place. With all the moving parts that we've talked about, I think you can back off, as we talked about, maybe 6 basis points going forward for the tax-effective piece of that if you are tracking or if you care. I assume your models are taking that into account. There are an awful lot of moving parts. I do think that we have seen some increases on some of our deposits, again an acceleration. I think that, that margin is going to contract a little bit. I think I mentioned the $1.8 million purchase accounting adjustment. That's not core necessarily, but we are going to see a decrease of somewhere in that neighborhood in income flowing through the margin for 2018. We are going to -- and we have seen an acceleration in the cost of funds on our CD portfolio. It's a pretty short book and it's repricing. I think it hit the low watermark, gosh, 2014 probably at 1% and we're up in the 1.20s now and heading higher. So I just think as I look -- I just don't think -- and I look back a year ago, we were about 10 basis points lower on cost of funds. I think the next year, we're going to be more than 10 basis points higher in cost of funds when we're talking about the fourth quarter of 2018 a year from now. And so that would be my guidance to you, Brian, unless you have something more specific.
Brian Joseph Martin - VP & Research Analyst
Yes. I mean, the only thing I'd ask -- I appreciate, Jim. Just the one comment. If you posted 3.77% but you take out the accretion and just, I guess, omit that for a minute, you're kind of maybe at the low 3.60s type of level, 3.62-ish is kind of what I was estimating. That 3.62% level, you would expect it to be lower by some degree in the first quarter as -- when you complete the first quarter. That's kind of what you're suggesting here based on the tax reform and then we make adjustments from there. But maybe 5, 6 basis points below that 3.62% level on the core and then make our other assumptions. Is that kind of fair with what you're saying?
James M. Cantrell - CIO, VP & Treasurer
Yes. If you're dropping for the tax, I think that's exactly right. I would take it down right off the bat for the tax effect and then I think the trend is going to be lower than the low 3.60s. I think the impact -- the influences on the margin are going to be, in the whole or in the main, negative.
Charles N. Funk - President, CEO & Director
But we -- and we do get some benefit from the increase in the prime rate.
James M. Cantrell - CIO, VP & Treasurer
We will. We have several hundred million dollars of prime-based loans. So there's a timing issue, and we should -- that will flow through as a positive.
Brian Joseph Martin - VP & Research Analyst
Okay. I think you answered it. But -- so I mean, whatever we reset it to, your sense is that the general trend in the core margin throughout 2018 would be a little tick down from -- wherever we're at first quarter, it still may go a little bit lower throughout the year is kind of how you're thinking about it today.
James M. Cantrell - CIO, VP & Treasurer
And it's going to be a small movement, I would say, Brian. And we have offsets, as Charlie mentioned, we do have some increase in loans that will offset some of this. I just -- I think there's a mix phenomenon going -- we're having a hard time keeping hold of 0-interest deposits. That's an area where we struggle. So that part of the mix is going to shift against us and has already, and I don't see that getting any better. So part of my thought process is we're going to see a little degradation in the mix of our funding costs, too.
Brian Joseph Martin - VP & Research Analyst
Got you. Okay. That's all helpful. I appreciate it, Jim. And then I guess maybe another one for you or I guess just since you brought it up earlier, you talked about the fee income and Charlie talked about a few of the initiatives and maybe hiring you're thinking about or looking at for this year. But in general, if you look at fourth quarter's type of run rate, is that a pretty good barometer? You've talked about some positive events in third quarter being in there. So I guess, when you look at fourth quarter being pretty representative of how you guys feel as kind of a minimum baseline and then you got some growth off of that into -- on that the run rate into '18. Is that kind of how you're thinking about it? Or am I without giving away anything?
Charles N. Funk - President, CEO & Director
I would continue to forecast increases for our wealth management area, even though they may not be 11% that they were last year. But we think nice increases. Fees are an interesting thing. We have some opportunity in our company to do a better job on fees, so I'd be disappointed if fees didn't improve modestly, and that would be because of better collection throughout the company in 2018. And then Kevin can comment on mortgage, but I think we think that the run rate is a little better on mortgage.
Kevin E. Kramer - COO
Yes, Brian, especially from a fee perspective. Part of the strategy in mortgage is to retain as much servicing rights on the portfolio as possible. When you look at 2016, we retained about, of the ones possible, about 34% of the servicing rights. 2017, that number is over 80%. And what that means is, while you retain the servicing rights, you don't get as much up front when you sell these loans into Fannie or the conduits. You eventually earn that back, and that payback is about 16 months. And with our average life of our mortgage loans being about 7 years on the books, we'll end up making, on our average loan, about $3,000 more by retaining the servicing rights than if we would have sold it off at the beginning. So you pay a little bit of a penalty, which we started to in -- late 2016 and through 2017, by retaining the servicing rights and thus not receiving as much upfront income. But at about that 16-month time frame is where it starts to be accretive to the overall revenue. So we'll start to see that flow in, in 2018, and we'll hit full force by the time we get to the end of 2018. So that -- again, not a huge move but a nice move upwards in terms of fees for us.
Brian Joseph Martin - VP & Research Analyst
Okay. No, that's helpful. And I guess, just the last 2 was just on the expense number, just not to beat a dead horse but it sounds like the -- you talked, Charlie, about where we're at and a little benefit you had in the fourth quarter on the expenses. But somewhere, the low 80 type -- $80 million number for '18, if you just annualize the $20 million and then maybe a little bit on top of that, kind of seems how you guys are thinking about '18 at this point from an expense standpoint. Is that fair based on the comments you've made?
James M. Cantrell - CIO, VP & Treasurer
Yes, this is Jim. I think that's pretty -- round numbers, I think that's pretty accurate. It works out pretty neatly at $80 million and $20 million if you just straight-line it.
Brian Joseph Martin - VP & Research Analyst
Yes, okay, all right. And then last one and -- for whomever but, I guess, maybe probably Charlie. Just on M&A, Charlie. I think you talked a couple of calls ago, I don't recall when it was, but it seemed like there were more -- there was more activity in the Iowa market from an M&A perspective. And you talked about not putting something up last year, you walked away from one or something that happened last year. But just kind of the activity today, can you just talk a little bit about where that's at? Certainly, I guess I understand the interest on your part, but just kind of where is activity today? And is it up or down? And if you could just characterize that a bit and just remind us just where size-wise, your markets, you're more focused on?
Charles N. Funk - President, CEO & Director
Yes, thank you. That was a good question, Brian. In terms of size, I think it's smaller just because I think that's what's available, and I think smaller banks are coming to the realization that now might be the time. And I think we're still sluggish from the holidays. I do think activity will pick up based on anecdotal things that I might know. And I think I've said this before in some forums. I do think that in terms -- we are looking primarily for opportunities within our footprint, specifically in Minnesota and in Iowa. But I think the lower loan deposit but good core stable deposit banks, even though they may not be good earners, if we have expense opportunities, we just think deposits are going to be very, very valuable to have. So whereas we might not have been so interested 3 years ago, we might be a little more interested now just because of the benefit that comes from having stable funding that can be loaned out elsewhere in our footprint. Those opportunities don't exist in the home footprint. So smaller, probably will pick up in terms of activity, but that's yet to be seen. I hope I answered your question.
Brian Joseph Martin - VP & Research Analyst
Yes. No, that's very helpful. So I think that was all I had.
Operator
(Operator Instructions) Showing no further questions, I would like to turn the conference back over to Charles Funk for any closing remarks.
Charles N. Funk - President, CEO & Director
Only that we thank everyone for being on the call this morning, and we wish everyone a good rest of the first quarter and a good January. Thank you, Chad.
Operator
You're welcome. The conference is now concluded. Thank you for attending today's presentation. You may now disconnect. Take care.