First Interstate BancSystem (FIBK) Q1 2026 earnings review
Margin Expands as Balance Sheet Shrinks in Transition Year
First Interstate's Q1 2026 results highlight the intentional 'shrink to grow' strategy. Net interest margin expanded for the eighth consecutive quarter to 3.41%, and deposit costs fell to 1.20%. However, this rate success was overshadowed by volume contraction. Net Interest Income (NII) actually fell by $5.7M sequentially because total loans dropped another 3.1% to $14.7B. While credit metrics were a mixed bag—net charge-offs plummeted, but a single client pushed non-performing assets up 17.5%—management aggressively returned capital, repurchasing 2.39 million shares. The 2026 guidance confirms the bottoming phase, projecting flat-to-declining loans before a second-half recovery.
🐂 Bull Case
Net interest margin hit 3.41%, an increase of 22 bps YoY. Fixed asset repricing and disciplined deposit cost management (down 10 bps QoQ) are driving yield improvements.
Armed with a 14.30% CET1 ratio, FIBK repurchased $84M of stock in Q1 and operates under an upsized $300M total authorization, providing a robust floor for EPS.
🐻 Bear Case
Despite margin percentage expansion, shrinking loan volumes and fewer accrual days caused actual Net Interest Income to drop 2.8% sequentially.
Non-performing assets spiked 17.5% QoQ to $162.5M, driven by a single $20.2M commercial relationship, showing sensitivity to individual client defaults in a shrinking portfolio.
⚖️ Verdict: ⚪
Neutral. Management is executing its operational cleanup exactly as promised—cutting bad loans and repurchasing cheap stock. However, until organic loan growth turns positive, top-line revenue will remain under pressure.
Key Themes
Asset Repricing Driving Margin Expansion
Net Interest Margin is Accelerating. It rose 5 bps sequentially to 3.41%, marking eight consecutive quarters of expansion. This is supported by $2.6B of fixed/adjustable rate loans and $2.0B of securities expected to reprice at higher rates through 2027. The yield on average earning assets held steady while the cost of interest-bearing liabilities dropped 13 bps to 1.64%.
NII Dollars Contradict Margin Narrative
Decelerating. Management frequently highlights the expanding Net Interest Margin percentage, but the actual Net Interest Income dollars are shrinking. NII fell from $206.4M in 25Q4 to $200.7M in 26Q1. The positive margin percentage cannot currently outrun the negative volume effects of a balance sheet that shrank by $1.85B YoY.
Aggressive Share Repurchases
Accelerating. With a strong CET1 ratio (14.30%), FIBK is aggressively buying back its own stock. The company repurchased 2.39 million shares for $84.0M in Q1 alone, supplementing the 3.65 million shares bought in 2025. This was bolstered by a new $150M authorization in January 2026, serving as a primary driver of EPS defense while the loan book shrinks.
Single-Client Credit Vulnerability
Reversing. After quarters of proactive credit clean-up, Non-Performing Assets jumped 17.5% QoQ to $162.5M. Management attributed this entirely to a single client relationship comprising $20.2M in commercial and CRE non-accrual loans. While total criticized loans fell slightly, this specific spike exposes the portfolio's sensitivity to concentration risk.
Footprint and Organizational Restructuring
Stable. FIBK is moving from a layered regional structure to a flatter 'State President' model to accelerate local decision-making. Coupled with the sale of branches in AZ, KS, and NE, management believes concentrating capital in a contiguous 10-state footprint will eventually unlock organic growth in the second half of 2026.
Macro Rate Headwinds on Loan Demand
Stable. The 2026 guidance explicitly assumes zero rate cuts. While this 'higher for longer' macro environment aids asset repricing and prevents sudden NIM compression, it actively suppresses the commercial pipeline and real estate loan demand, making organic loan growth highly challenging.
Other KPIs
Reversing. Dropped massively from $22.1M (0.56% of average loans) in 25Q4 to just $2.4M (0.06%) in 26Q1. This highlights that while NPAs rose due to a specific downgrade, realized losses have plummeted to well below the long-term target of 20-30 bps.
Decelerating. Decreased $205.3M from Q4, though non-interest bearing deposits only fell 1.1% to $5.23B. The total cost of deposits improved nicely, dropping to 1.20% from 1.30% in Q4, showing strong pricing discipline.
Stable. Down $9.1M QoQ, largely due to lower short-term incentive and severance accruals compared to Q4. This keeps the efficiency ratio contained at 63.8%.
Guidance
Stable. Implies roughly $206M to $211M per quarter for the rest of the year. This represents an acceleration from the $200.7M posted in Q1, relying on the assumption that NIM expansion will finally outpace loan shrinkage. Importantly, this assumes zero rate cuts.
Decelerating. Compared to Q1's ending balance of $14.73B, this guidance suggests loans will be essentially flat to slightly down for the remainder of the year. Management assumes improving production will only offset intentional portfolio run-offs by the second half of the year.
Accelerating. Implies modest growth from the current $21.88B level, assuming normal seasonality. This supports the bank's strong liquidity profile and low reliance on wholesale funding.
Stable. Implies a quarterly run rate of $157M to $160M for the remainder of the year, perfectly in line with Q1's $157.6M. This includes reinvestments in relationship managers and advertising.
Key Questions
Organic Loan Growth Inflection
With loans down 3.1% in Q1 and guidance implying flat balances for the rest of the year, what specific leading indicators from the newly implemented 'State President' model give you confidence that a second-half loan rebound will materialize?
Single-Client NPA Spikes
Non-performing assets spiked 17.5% due to a single $20.2M commercial relationship. What is the specific nature and sector of this credit, and does it represent a broader systemic risk in the portfolio?
Deposit Beta in a 'No Cut' Environment
Your FY26 NII guidance assumes no rate cuts. Given that you successfully lowered your cost of deposits by 10 bps this quarter, how much further downward flexibility do you have on deposit pricing if rates remain static?
NII Dollar Compression
While NIM percentages are expanding, absolute NII dollars fell sequentially. At what point does the mathematical benefit of NIM expansion overcome the mathematical drag of a shrinking earning asset base?