How to Read Bank Financials
Bank financial statements look different from other companies. This guide explains the six most important metrics used to evaluate whether a bank is healthy, profitable, and safe. Data from FDIC and NCUA quarterly call reports, covering banks and credit unions across all 50 states; see our methodology.
1. Tier 1 Capital Ratio
Formula: Core Capital ÷ Risk-Weighted Assets
This is the most critical safety metric. "Tier 1 capital" includes common equity and retained earnings — the bank's own money that can absorb losses. "Risk-weighted assets" adjusts the bank's loan portfolio by risk level (cash = 0% risk, corporate loans = 100% risk).
- Under 6%: Undercapitalized — regulatory intervention likely
- 6-8%: Adequately capitalized
- 8-10%: Well capitalized
- 10%+: Strong buffer against unexpected losses
2. Return on Assets (ROA)
Formula: Annual Net Income ÷ Average Total Assets
ROA measures how efficiently a bank converts its assets into profit. A bank with $1 billion in assets and $10 million in net income has an ROA of 1%. Most profitable banks target 1-1.5%.
- Below 0%: Operating at a loss — serious concern
- 0-0.5%: Low profitability
- 0.5-1.0%: Average performance
- 1.0-1.5%: Good performance
- 1.5%+: Excellent performance
3. Texas Ratio
Formula: Non-Performing Assets ÷ (Tangible Equity + Loan Loss Reserves)
Created in the 1980s to predict bank failures during the Texas oil bust. It measures whether a bank has enough capital to cover its bad loans. When Texas Ratio exceeds 100%, a bank has more problem loans than capital to absorb them.
- Under 15%: Low risk
- 15-30%: Elevated risk — worth monitoring
- 30-100%: High risk
- Over 100%: Historically, high probability of failure
4. Efficiency Ratio
Formula: Non-Interest Expense ÷ (Net Interest Income + Non-Interest Income)
This measures how much a bank spends to generate each dollar of revenue. A 60% efficiency ratio means the bank spends $0.60 to earn $1.00. Lower is better. Large regional banks typically operate at 55-65%; community banks can run at 70%+.
- Under 50%: Excellent efficiency
- 50-60%: Good efficiency
- 60-70%: Average
- 70-80%: Below average
- Over 80%: Inefficient — potential management or revenue issues
5. Return on Equity (ROE)
Formula: Annual Net Income ÷ Average Shareholders' Equity
ROE shows how much profit a bank generates for its shareholders. The banking industry average is typically 8-12%. High ROE is desirable, but very high ROE combined with low capital ratios can signal excessive risk-taking.
6. Net Interest Margin (NIM)
Formula: (Interest Income − Interest Expense) ÷ Average Earning Assets
NIM is the "spread" between what a bank earns on loans and pays on deposits. Rising interest rates generally increase NIM (banks reprice loans faster than deposits). NIM of 3-4% is typical for community banks; large banks often run 2-3%.
Quick Reference Table
| Metric | Good | Caution | Warning |
|---|---|---|---|
| Tier 1 Capital | ≥ 10% | 6-10% | < 6% |
| ROA | ≥ 1% | 0.5-1% | < 0.5% |
| Texas Ratio | < 15% | 15-50% | > 50% |
| Efficiency Ratio | < 60% | 60-80% | > 80% |
