I wanted to touch on the non-interest-bearing growth on the organic side. I think a real outlier and most simply looking to hold that balance, not show double-digit annualized growth. I guess what occurred in the quarter with the noninterest-bearing growth?
Byron Pollan
Yeah, Jeff, this is Byron. Yes, we were really pleased to see that organic growth in the third quarter. Third quarter is typically a time when we see seasonal strength in our deposit base and particularly in non-interest-bearing. And that's what we saw this quarter. And our divisions really did deliver on that. So that was great to see.
We are continuing to see a little bit of migration to interest-bearing accounts that is still there, but it's not nearly at the level that we were seeing, say, a year ago. In terms of our outlook for the fourth quarter for non-interest-bearing, I do think that we could be flat to down a little. We could see a little bit of unwind of that seasonal inflow that just came in.
Jeff Rulis
Okay. And Byron, the timing of maybe -- the timing of that non-interest-bearing build in the quarter and, additionally, the timing of bringing borrowings down. My guess is, and I'm ultimately giving you a question here. The impact on deposit cost. Maybe if you have an exit or spot deposit cost at the end of the quarter would also be helpful.
Byron Pollan
Sure. In terms of the timing of the non-interest-bearing build throughout the quarter, we saw every month, July, August, September -- saw growth on an organic basis in our non-interest-bearing. So it was really spread very nicely throughout the quarter. In terms of the timing of our FHLB paydown, the overnight portion of our FHLB funding that did happen in July earlier in the quarter.
And in terms of a spot rate, our spot rate for total deposits, this is the rate on September 30 was 1.35%. Did I cover all your questions?
Jeff Rulis
Yes, that helped a lot -- maybe if I could hop to expenses. I think really at the low end of the guide, and I think it include merger costs. So I guess I'm hesitant to kind of ask about the run rate ahead? It seems like Ron, we beat that number a little bit each quarter.
So what should we expect in terms of -- I guess you'd have the branches for a full quarter. I think you missed a couple of weeks in the third, but any thoughts on expenses ahead?
Ronald Copher
Yeah. Just to recognize, yes, the divisions really did a stellar job being very focused on controlling expenses and so hats off to them, and that's where is happened. Yeah, it's a pleasant development. So if you do exclude the gain on the sale and the M&A, the core non-interest expense came in at $143.4 million. And we think that, that can be maintained into the next quarter.
And we need to go back and understand what's really driving that. You'll see that our compensation is very well controlled, even picking up folks from the Rocky Mountain Bank branch is very controlled. And again, that's in part, in large measure to our technology. I've spoken about in the past, we've cut the time in half to open an account. We've got closing on each day now instead of a batch submission. It's real time.
The point of all this is that we're doing things very well, but with less people. The divisions have strongly embraced the technology. So they're able to do more with less, and that's been a theme that we started talking about really last year.
And so that continues to happen and that will then help understand the guide I will give for core non-interest expense. When I say core, it means reported less gain on sale or losses, it means excluding the M&A. So I'm going to lower the guide -- we're going to lower the guide by $2 million on each end. So it will be $143 million to $145 million for Q4.
Maybe piggy backing off that expense question, again, it's compared really favorably to where you've been guiding now for a couple of quarters, I think. Just as we look ahead, I know you may not be ready to look at 2025, yet with where you are in the budget process.
But as we think about the natural kind of expense growth rate of your company, what's that good -- what -- what's a good run rate for growing expenses just on a normalized basis. And it seems like most of the room and fat has been cut given what you've done, but any additional thoughts there?
Byron Pollan
Yeah. Kelly, appreciate the question. I would go with 3%. That's slightly better than what we've had on average this year than last year. And in part, that's the efficiency gains we're getting there. We're still having -- using third-party consultants to help build out our control functions.
And in large measure, when I say control functions, that reflects the heightened continuing regulatory expectations. And so we want to make sure as we grow that we're staying on top of that, staying ahead of it. But coming back to the answer is 3%.
Kelly Motta
Got it. That's helpful. And then maybe turning to loan growth. You've been ex the deals you've done this year, you're running in the low single-digit range. Just wondering if you've seen any pent-up demand ahead of rate cuts and how to think through that? As well as where you're seeing opportunities in the state of the pipeline as it stands today?
Tom Dolan
Yeah. Kelly, this is Tom. We're seeing continued optimism from our customers especially after the recent rate reduction. But we have yet to see it translate to significant deal flow. To answer your question on the pipeline, it was fairly stable throughout the third quarter. But I think there's still a little bit of uncertainty that's keeping that pent-up demand on the sidelines until there's a little bit more clarity over the next quarter.
So for the rest of the year, I think you're probably going to see more of the same. Fourth quarter is typically a little slower growth quarter for anyway, particularly due to the agriculture paydowns. So like I said in the fourth quarter, I think we'll probably see a little bit more of the same.
Maybe touching on the growth side. I mean, organic growth was a bit lighter. I'm curious maybe some of the drivers behind that. I mean how much of that's a function of weaker demand or higher payoffs and paydowns?
Just curious kind of how the pipeline is shaping up, what you're hearing from clients and where you're seeing opportunity to drive growth and just kind of how you think about the pace of organic loan growth, going forward?
Tom Dolan
Yes, David, this is Tom. Yes, there's still some pent-up demand. There's continued optimism. But pipelines were relatively stable throughout the quarter. So the answer to your question on the drivers behind the growth, it was a little bit of both.
There's not quite the strength of demand that we would normally see. And then in addition to that, we've seen elevated payoffs, as some of these construction and development projects either sell out or hit stabilization and either the asset is sold or is refinanced into the secondary market.
So we're continuing to see that as well. And -- that's another reason why you've seen the construction balances come down for another quarter. Those things move into either the term portfolio or are sold and the volume is just not replacing the outflow.
David Feaster
Okay. And then maybe touching on some of the repricing and remixing dynamics within the earning asset base. I'm curious, how do you think about cash flows from the securities book and the roll-off rates there?
And similarly, with the upcoming maturities in the loan portfolio, where new loan yields are relative to roll-off rates? And just -- how do you think about the repricing dynamics there in the near term and just the opportunity to continue to remix the earning asset base?
Randall Chesler
Well, let's -- so let's take the first part of that. The new loan piece and what your thoughts are on that. And then maybe, Byron, we can move on to the investment portfolio and cash flows.
Tom Dolan
Yeah. So the loan yields, we're still seeing mid to upper [7s] in our top line production. So as a relation to the coming off yield, I'll pass it on to Byron.
Byron Pollan
Sure. We continue to see strong cash flow off of our securities portfolio. $250 million a quarter for the next couple of quarters, I think, remains a good guide. That cash flow includes principal and interest. The yield of that cash flow is coming off that, it's about 1.5%. And so as we move that and remix that into the loan portfolio at yields that Tom just mentioned, that repricing lift creates a lot of momentum for us.
I will say we do start to see some additional securities maturity in 2025. And so in the second quarter, we have -- we start to see some treasury bonds come back to us. We have $50 million in the second quarter of 2025.
And then in the fourth quarter of 2025, we have $270 million mature. So we have been running at a pretty consistent $250 million pace. Look for that to begin to increase next year.
David Feaster
Okay. And then maybe just kind of thinking high level, how do you think about your footprint, right? I mean you've got a really broad network, in footprint and some massive density in some key markets, but maybe smaller footprints in some of the other markets. I'm curious how you think about expansion priorities, where you're focused on driving growth and how do you think about organic growth relative to supplementing that with M&A and just kind of how some of those conversations are going?
Ronald Copher
Yeah. So I think the outlook is very, very good. The eight states we're in are some of the fastest-growing states in the United States in terms of GDP growth. So very encouraged by that. In terms -- it's really both strategies, Dave. So we have an organic strategy with each division where they're looking at their markets and expanding as they see opportunities. And across the 17 divisions that takes place at quite a few of them.
At the same time, we're looking at M&A opportunities to fill in and grow scale in a lot of these fast growth markets. And so as we talk to people and look at opportunities, those are the things that we see. And more and more, we see opportunities to add on to existing divisions and build scale with some of the things that we're looking at.
So really both David, it's both organic. We don't wait for an acquisition to appear, but there's markets we think are good markets to go into, we'll go into them organically. And then an acquisition that might be available to us, we look at as just building scale in the markets that we're in today.
David Feaster
Are there any of your markets where you see the most opportunity at this point or where you'd like to drive more density in? Or is there opportunity for market expansion that maybe looks attractive to you at this point?
Ronald Copher
Yeah. They're -- across the 8 states, they all have areas that we'd be interested in growing through acquisition. So I can't say there's one that we would put at the top. And I think that's one of the strengths that we have is we have multiple options across those 8 states. And so we're not really pinned down waiting for something in one particular area, keep our options open, look across those 8 states and where the good opportunities occur, that's where you'll see us go.
Just had one other. And I know we're splitting hairs on the credit side, but just wanted to kind of check in on the small increase, and it's a fraction appears, but just on the -- it looked like some ag and one to four family and Randy, I think in your opening comments, I didn't sound anything systemic and at these low levels. We're going to see it bumping around. But anything to speak on and what you saw in terms of the quarter?
Tom Dolan
Yeah. Jeff, I appreciate the context around the change. But very appreciated. But just as Randy said, there's no specific industry asset class or geography that's shown from any level of outsized risk. I think what we're seeing that is just continued signs of normalization in overall asset quality. We're obviously coming off of a very strong position of asset quality. So it doesn't take much to move the needle.
And getting into the particulars, you mentioned agriculture. That was basically kind of one relationship that we have been working with for some time now. The challenge there is more on the management side, not market. So we'll be working through that over the next couple of quarters. Outside of that, there's nothing of particular concern. It's pretty well spread out.
Operator
Thank you. I'm not showing any further questions in the queue. I would now like to turn it back over to Randy for any closing remarks.
Randall Chesler
Great. Well, thank you very much for dialing in today...
-- about that. I thought it was in the queue and it wasn't. First question is just on the core loan yields. I think they were up, excluding accretion by 12 bps to [5.61%]. Can you just remind us how much of your loan book is truly floating? And then assuming we get some additional rate cuts here in the fourth quarter and into next year, what are your thoughts on just the trend in loan yields with the benefit of the back book and -- but also the pressure on floating?
Byron Pollan
Yeah, this is Byron. I appreciate the question. In terms of floating, I truly floating, about 7% of our loan portfolio is indexed to prime. We really don't have much index to SOFR. So that is the floating component of our loan portfolio. Trend into next year, as you mentioned, the back book and the repricing of that is that it's going to be a very powerful dynamic for us.
And so I think I would continue to expect our loan yield to increase as that repricing happens. About 20% of our loan portfolio will reprice in any given year. And we do expect some lift in that repricing at rates where they are and at rates where we see the market expectations are going. So we do see continued lift.
Matthew Clark
Great. And then just the average margin in the month of September, if you have it, either core or reported?
Now we don't have any further questions. Randy, over to you.
Randall Chesler
All right, Victor. I appreciate it. And thank you, everybody, for dialing in. Appreciate the interest. And I want to wish everybody a great rest of the day, Friday and weekend as well. Thanks for joining us this morning.
Operator
Thank you for your participation in today's conference. This does conclude the program. You may now disconnect. Everyone, have a great day.