Short version: Of the 1,792 US banks holding at least $500M in assets that reported a net interest margin for Q2 2026, the 50th-highest came in at 5.58%. The median across the same group was 3.75%. The top of the table is Square Financial Services, Inc. of Salt Lake City, UT at 40.63%.
What you are looking at
Net interest margin is net interest income divided by average earning assets. It is the cleanest single read on how much a bank makes from the spread business: borrow at one rate, lend at a higher rate, keep the difference. Anything above 5% is unusual. Anything above 8% means the bank is doing something most banks are not.
The ranking is built from the FFIEC call reports filed for the period ending June 30, 2026 - the same data the BankingLENS dashboard serves, not a sample. Two screens are applied before anything is sorted. Banks under $500M in total assets are left out, because at that size a single lumpy quarter moves a ratio further than any strategy would and a national list becomes a list of accidents. And a charter has to be in the banking business to be ranked: deposits worth at least a quarter of its assets, or loans worth at least a quarter of its assets. That second screen removes 11 trust and custody charters this quarter, whose ratios are arithmetic rather than performance.
1,792 banks clear both screens and reported a net interest margin this quarter. 37 of the 50 below link to their own page, where the same figures sit beside the rest of the call report.
The 50 banks, ranked
Click a column header to sort. NIM is the headline number; ROA is the check on it.
| # | Bank | HQ | Asset band | NIM | ROA | Assets |
|---|---|---|---|---|---|---|
| 1 | Square Financial Services, Inc. | Salt Lake City, UT | $1B - $3B | 40.63% | 37.37% | $2.1B |
| 2 | Credit One Bank | Las Vegas, NV | $1B - $3B | 21.71% | 25.19% | $2.4B |
| 3 | Comenity Bank | Wilmington, DE | $3B - $10B | 19.68% | 5.00% | $7.4B |
| 4 | Comenity Capital Bank | Draper, UT | $10B - $100B | 17.19% | 1.64% | $13.9B |
| 5 | Merrick Bank | South Jordan, UT | $3B - $10B | 16.71% | 2.53% | $9.1B |
| 6 | First Electronic Bank | Salt Lake City, UT | $500M - $1B | 16.39% | 7.60% | $503M |
| 7 | Quill Bank | Pleasant Grove, UT | $1B - $3B | 16.28% | 5.31% | $1.6B |
| 8 | Webbank | Salt Lake City, UT | $1B - $3B | 15.14% | 4.52% | $2.9B |
| 9 | Finwise Bank | Murray, UT | $500M - $1B | 12.68% | 1.39% | $915M |
| 10 | Synchrony Bank | Draper, UT | Over $100B | 11.73% | 2.85% | $115.2B |
| 11 | Barclays Bank Delaware | Wilmington, DE | $10B - $100B | 10.86% | 2.42% | $43.5B |
| 12 | WEX Bank | Sandy, UT | $10B - $100B | 10.50% | 4.29% | $10.7B |
| 13 | Beal Bank USA | Las Vegas, NV | $10B - $100B | 9.01% | 8.25% | $11.0B |
| 14 | 1st Financial Bank USA | Dakota Dunes, SD | $1B - $3B | 8.99% | 0.97% | $1.4B |
| 15 | Column | Chico, CA | $1B - $3B | 8.82% | 8.30% | $1.8B |
| 16 | American Express National Bank | Sandy, UT | Over $100B | 8.25% | 3.72% | $213.9B |
| 17 | Medallion Bank | Salt Lake City, UT | $1B - $3B | 8.16% | 2.13% | $2.8B |
| 18 | The Pitney Bowes Bank Inc. | Salt Lake City, UT | $500M - $1B | 8.12% | 5.41% | $796M |
| 19 | Capital One | Mc Lean, VA | Over $100B | 8.08% | 1.68% | $662.2B |
| 20 | Lead Bank | Kansas City, MO | $1B - $3B | 7.88% | 1.59% | $2.8B |
| 21 | First Savings Bank | Beresford, SD | $1B - $3B | 7.86% | 2.62% | $1.6B |
| 22 | Scale Bank | Edina, MN | $500M - $1B | 7.48% | 2.29% | $627M |
| 23 | Ixonia Bank | Ixonia, WI | $1B - $3B | 7.39% | 1.18% | $1.1B |
| 24 | First National Bank | Fort Pierre, SD | $1B - $3B | 7.23% | 2.50% | $2.0B |
| 25 | Pathward | Sioux Falls, SD | $3B - $10B | 7.20% | 2.77% | $7.3B |
| 26 | Bank of Lake Mills | Lake Mills, WI | $500M - $1B | 7.03% | 2.33% | $534M |
| 27 | Coastal Community Bank | Everett, WA | $3B - $10B | 7.01% | -1.14% | $5.5B |
| 28 | Gulf Coast Bank and Trust Company | New Orleans, LA | $3B - $10B | 6.92% | 1.10% | $3.9B |
| 29 | Sunmark Community Bank | Perry, GA | $500M - $1B | 6.65% | 2.89% | $557M |
| 30 | Community First Bank of Indiana | Kokomo, IN | $500M - $1B | 6.63% | 1.14% | $980M |
| 31 | Eaglemark Savings Bank | Reno, NV | $500M - $1B | 6.61% | 4.48% | $756M |
| 32 | Transportation Alliance Bank, Inc. Dba Tab Bank | Ogden, UT | $1B - $3B | 6.50% | 1.04% | $1.6B |
| 33 | First Credit Bank | West Hollywood, CA | $500M - $1B | 6.49% | 4.36% | $516M |
| 34 | Green Dot Bank | Provo, UT | $3B - $10B | 6.44% | 1.67% | $5.4B |
| 35 | First National Bank of Omaha | Omaha, NE | $10B - $100B | 6.41% | 1.79% | $34.2B |
| 36 | Peoples Bank | Mendenhall, MS | $500M - $1B | 6.37% | 3.98% | $503M |
| 37 | TBK Bank, SSB | Dallas, TX | $3B - $10B | 6.21% | 0.63% | $7.4B |
| 38 | Happen Bank | Lehi, UT | $10B - $100B | 6.15% | 1.82% | $12.5B |
| 39 | TD Bank USA | Wilmington, DE | $10B - $100B | 6.14% | 0.41% | $32.1B |
| 40 | John Deere Financial, F.S.B. | Middleton, WI | $3B - $10B | 6.06% | 3.10% | $4.9B |
| 41 | Anderson Brothers Bank | Mullins, SC | $1B - $3B | 6.03% | 1.51% | $2.4B |
| 42 | Sofi Bank | Cottonwood Heights, UT | $10B - $100B | 6.00% | 1.95% | $56.8B |
| 43 | Esquire Bank | Jericho, NY | $1B - $3B | 5.98% | 2.33% | $2.5B |
| 44 | Maverick Bank | Fort Davis, TX | $500M - $1B | 5.97% | 2.61% | $809M |
| 45 | Celtic Bank Corporation | Salt Lake City, UT | $3B - $10B | 5.93% | 3.39% | $5.3B |
| 46 | Stearns Bank | Saint Cloud, MN | $3B - $10B | 5.83% | 2.09% | $3.3B |
| 47 | Bank of Eastern Oregon | Heppner, OR | $500M - $1B | 5.75% | 1.91% | $934M |
| 48 | Herring Bank | Amarillo, TX | $500M - $1B | 5.75% | 0.15% | $541M |
| 49 | Sutton Bank | Attica, OH | $1B - $3B | 5.73% | 5.09% | $1.7B |
| 50 | Capital Bank | Rockville, MD | $3B - $10B | 5.58% | 1.25% | $3.8B |
Source: FFIEC call report data for the quarter ending June 30, 2026. Universe: US banks with $500M or more in total assets that reported a net interest margin and fund or lend like a bank. Sorted descending.
Leaders by asset size
A single national list on a ratio like this is really a list of business models, and the largest banks and the smallest ones are not competing with each other for anything. These are the leaders inside each asset band, which is the comparison a bank of that size would actually make.
| # | Bank | HQ | NIM | Assets |
|---|---|---|---|---|
| $500M - $1B · 746 banks · median 3.86% | ||||
| 1 | First Electronic Bank | Salt Lake City, UT | 16.39% | $503M |
| 2 | Finwise Bank | Murray, UT | 12.68% | $915M |
| 3 | The Pitney Bowes Bank Inc. | Salt Lake City, UT | 8.12% | $796M |
| 4 | Scale Bank | Edina, MN | 7.48% | $627M |
| 5 | Bank of Lake Mills | Lake Mills, WI | 7.03% | $534M |
| $1B - $3B · 625 banks · median 3.68% | ||||
| 1 | Square Financial Services, Inc. | Salt Lake City, UT | 40.63% | $2.1B |
| 2 | Credit One Bank | Las Vegas, NV | 21.71% | $2.4B |
| 3 | Quill Bank | Pleasant Grove, UT | 16.28% | $1.6B |
| 4 | Webbank | Salt Lake City, UT | 15.14% | $2.9B |
| 5 | 1st Financial Bank USA | Dakota Dunes, SD | 8.99% | $1.4B |
| $3B - $10B · 263 banks · median 3.64% | ||||
| 1 | Comenity Bank | Wilmington, DE | 19.68% | $7.4B |
| 2 | Merrick Bank | South Jordan, UT | 16.71% | $9.1B |
| 3 | Pathward | Sioux Falls, SD | 7.20% | $7.3B |
| 4 | Coastal Community Bank | Everett, WA | 7.01% | $5.5B |
| 5 | Gulf Coast Bank and Trust Company | New Orleans, LA | 6.92% | $3.9B |
| $10B - $100B · 126 banks · median 3.57% | ||||
| 1 | Comenity Capital Bank | Draper, UT | 17.19% | $13.9B |
| 2 | Barclays Bank Delaware | Wilmington, DE | 10.86% | $43.5B |
| 3 | WEX Bank | Sandy, UT | 10.50% | $10.7B |
| 4 | Beal Bank USA | Las Vegas, NV | 9.01% | $11.0B |
| 5 | First National Bank of Omaha | Omaha, NE | 6.41% | $34.2B |
| Over $100B · 32 banks · median 3.07% | ||||
| 1 | Synchrony Bank | Draper, UT | 11.73% | $115.2B |
| 2 | American Express National Bank | Sandy, UT | 8.25% | $213.9B |
| 3 | Capital One | Mc Lean, VA | 8.08% | $662.2B |
| 4 | USAA Federal Savings Bank | Phoenix, AZ | 5.20% | $106.2B |
| 5 | Pinnacle Bank | Nashville, TN | 4.53% | $128.8B |
What normal looks like
A ranking only means something against the middle of the distribution. These are the quartiles for net interest margin across every bank that filed for Q2 2026, including the thousands too small to appear above. The median bank reported 3.83%, with the middle half between 3.35% and 4.33%.
| Asset band | 25th pct | Median | 75th pct |
|---|---|---|---|
| Under $100M | 3.37% | 3.88% | 4.50% |
| $100M - $300M | 3.42% | 3.93% | 4.42% |
| $300M - $1B | 3.41% | 3.88% | 4.30% |
| $1B - $3B | 3.26% | 3.69% | 4.11% |
| $3B - $10B | 3.21% | 3.64% | 4.06% |
| $10B - $100B | 3.18% | 3.57% | 3.92% |
| Over $100B | 2.07% | 3.07% | 3.70% |
Source: BankingLENS, computed from FFIEC call reports for the quarter ending June 30, 2026. Quartiles are calculated across the full population of filing banks in each size band, not sampled. Non-insured non-deposit trust companies are left out of every statistic: they take no deposits and make no loans, so a margin or a funding cost computed for them has no meaning.
Why the top of the list looks like this
Scan the top of the table and a pattern shows up in the HQ column: Salt Lake City, Sandy, Draper, Sioux Falls, Wilmington. Those are the home addresses of US industrial banks and credit-card-bank subsidiaries, chartered in states built to host them. Utah and South Dakota lead, with Delaware close behind on credit card charters.
An industrial bank’s earning-asset mix looks more like a consumer finance company than a community bank. Banking-as-a-service and fintech-sponsor banks run loan books of small-business and consumer credit originated through partner platforms, at yields a commercial lender never sees. The funding is ordinary enough, so the whole difference lands in the margin. Credit card banks sitting inside a larger holding company are the same story one step further along.
Past the specialty charters, the community banks that make this list share a different profile: a large noninterest-bearing deposit base in a market with little rate-shopping pressure, and a loan book tilted to higher-yield categories such as agricultural operating lines, indirect used-car paper, construction and manufactured housing. That combination produces a 6% to 8% margin with nothing exotic behind it.
What NIM does not tell you
A high margin is not the same as a healthy bank. High NIM with weak ROA means most of the spread is being eaten by overhead, credit-loss provisions, or both - which is exactly what a banking-as-a-service partner watches for in a sponsor bank. The spread between the two columns is the signal: two banks can run the same margin and only one of them keeps it.
The other half of the caveat is category error. The largest diversified national banks are nowhere near this list, and should not be: their margins sit in the low single digits because they fund an enormous deposit franchise and lend against it conservatively. Comparing one of them to a credit card charter is not analysis.
Which is why a ranking is a starting point rather than an answer. Every bank above has a page here carrying its full call report picture, and Bank Peer Intel on the dashboard puts each figure against the peer group the bank is actually measured in - percentile rank on every metric, fourteen quarters of trend, and the flags an examiner reaches for first. That is how you tell a structural result from a good quarter.
Methodology
- Universe. Every US bank that filed a call report with the FFIEC for the quarter ending June 30, 2026.
- Size screen. Banks under $500M in total assets are excluded. A ranking of every filer on a raw ratio is topped by institutions small enough for one unusual quarter to move the number more than any decision they made.
- Banking screen. A charter is ranked only if deposits are at least 25% of assets or loans and leases are at least 25% of assets. 11 trust and custody charters over the size floor do neither: they file a call report but hold almost no deposits and make almost no loans, so their ratios are a function of near-empty denominators. Unusual but genuine banks - wholesale lenders, sweep-deposit banks, merchant lenders - clear it.
- Eligible. 1,792 banks cleared both screens and reported a net interest margin for the quarter.
- NIM definition. Net interest income over average earning assets, annualized. Earning assets come from Schedule RC as total assets less noninterest-bearing cash, premises, other real estate owned, intangibles and other assets, with the allowance for credit losses added back so loans enter net of unearned income only. The average is the two-point average of the current period end and the prior calendar year end.
- Ranking. Sorted by net interest margin descending. Top 50 shown, plus the top 5 inside each asset band.
- Source. FFIEC Central Data Repository, joined to bank identity - name, city, state, RSSD id and FDIC certificate - from the same filing. Figures are as reported by each institution and are not adjusted or restated.
- Reproducibility. This page is generated by
_tools/seo/build_ranking_pages.mjsfrom the published dataset. It is not hand-maintained, and it carries no figure that was typed in.
Related reading
- What is a good net interest margin for a bank? - the formula, what counts as good at your size, and how it moves through a Fed cycle.
- What is a good cost of funds for a bank? - the funding half of the margin, and the one a bank can actually manage.
- How to build a bank peer group - why the absolute number matters less than the company it keeps.
Photo by Jakub Zerdzicki on Unsplash.