Financial research concept

Bank Interest Rate Spread: Asset Yield Minus Funding Rate

Bank interest rate spread compares average earning-asset yield with the average cost of interest-bearing funding. Learn why it differs from net interest margin.

By Lee BaileyPublished Sep 21, 2026

Research context

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Research date: Sep 21, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context: 14 connected conceptsPart of the reviewed Bank Balance Sheet and Returns; issuer definitions remain distinct where disclosed.
Company examples: 1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.

Spread versus NIM
Part of the Bank Balance Sheet and Returns
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Bank interest rate spread measures the difference between the average yield on interest-earning assets and the average rate paid on interest-bearing liabilities.

Interest Rate Spread =
Yield on Interest-Earning Assets
- Rate on Interest-Bearing Liabilities

Spread versus NIM

Interest rate spread is not the same as Net Interest Margin.

NIM also reflects the benefit of noninterest-bearing funding and the balance-sheet relationship between earning assets and funding sources. A bank's NIM can therefore exceed its reported interest rate spread.

PNC reports interest rate spread separately from the impact of noninterest-bearing sources and from net interest margin.

Source:

PNC 2025 Annual Report

Interest rate spread isolates asset and interest-bearing-liability pricing. NIM is the broader spread-profitability measure.

Part of the Bank Balance Sheet and Returns

Connect average loans and deposits, earning-asset yields, deposit pricing and mix, tangible common equity, shareholder returns, and early problem-asset signals to understand bank balance-sheet economics.

Browse the full operating model in Company Analysis →

Where this concept fits

Average balance and spread engineCurrent relationship
Average loans, deposits, and interest-earning assets align balance-sheet scale with the period that generated earnings. Asset and loan yields show gross pricing, while interest-bearing deposit rates, noninterest-bearing deposit mix, and interest rate spread show how funding composition and pricing affect the spread engine.
Bank Average Deposits Average Interest-Earning Assets Bank Average Loans Interest-Bearing Deposit Rate Interest-Earning Asset YieldBank Interest Rate SpreadCurrent conceptBank Loan Yield Noninterest-Bearing Deposit Mix
Tangible capital and shareholder returns
Tangible common equity removes specified intangible assets from common equity, tangible book value expresses that capital per share, and ROTCE shows profitability relative to average tangible common equity under the issuer's reconciliation. Generic ROA and ROE remain owned by their existing canonical encyclopedia pages rather than duplicated here.
Return on Tangible Common Equity Tangible Book Value per Share Bank Tangible Common Equity
Credit deterioration ladder
Criticized assets can identify elevated weakness before default, classified assets generally represent more severe adverse grades, and nonperforming assets capture loans and other assets that have reached nonperforming status. Issuer definitions and denominators differ, so the three measures form a diagnostic sequence rather than a standardized formula.
Classified Assets Ratio Criticized Asset Ratio Nonperforming Assets Ratio

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

PNCOpen operating-model research →7 of 14 reviewed concepts in Bank Balance Sheet and ReturnsAverage balance and spread engine7 of 8 bridge concepts supportedContinue through this bridge:Average Interest-Earning Assets Bank Average Deposits Bank Average Loans Bank Loan Yield Interest-Bearing Deposit Rate Interest-Earning Asset Yield

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