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Turtle Mountain State Bank: Net Interest Margin

4.41% Ranks #822 of 3,651 U.S. banks · 78th percentile

Data as of · sourced from FFIEC call reports. How we update

Turtle Mountain State Bank reported a net interest margin of 4.41% as of Q2 2026, ranking #822 of 3,651 U.S. banks (78th percentile). Net Interest Margin (NIM) measures the spread between interest earned on assets and interest paid on liabilities, the core unit economics of a commercial bank.

12-Quarter Trend

Q3 2023 Latest
Q2 2026 4.41%
Q1 2026 4.16%
Q4 2025 4.60%
Q3 2025 4.64%
Q2 2025 4.99%
Q1 2025 4.53%
Q4 2024 5.16%
Q3 2024 5.09%
Q2 2024 5.50%
Q1 2024 5.02%
Q4 2023 5.55%
Q3 2023 4.71%

National Context

Latest value 4.41%
National rank#822 of 3,651
Percentile 78th
12-quarter low4.16%
12-quarter high5.55%
Full rankingView leaderboard

What is the Net Interest Margin?

Net Interest Margin measures net interest income (interest earned minus interest paid) against average earning assets. It is the core spread the bank earns from its primary business, lending deposits at higher rates than they cost.

Most US community banks report NIM between 2.8% and 4.0%. Higher is generally better but reflects either premium lending (higher-yielding loans) or low-cost funding (large core deposit franchise). Falling NIM in a rising-rate environment signals the bank's deposit costs are catching up to its asset yields.

Full definition & formula →

Frequently asked questions

What is Turtle Mountain State Bank's Net Interest Margin?

Turtle Mountain State Bank's Net Interest Margin was 4.41% as of Q2 2026, ranking #822 of 3,651 U.S. banks.

What is the Net Interest Margin?

Net Interest Margin measures net interest income (interest earned minus interest paid) against average earning assets. It is the core spread the bank earns from its primary business, lending deposits at higher rates than they cost.

Source: FFIEC call reports, standardized by BankRegReports. Values are point-in-time as filed. See the full Turtle Mountain State Bank profile or how this data updates. The figures come from the bank's call report.

Regulator records: FDIC BankFind (cert 58586) · FFIEC NIC profile (RSSD 3626184)