How do I calculate the Tier 1 leverage ratio?

Divide a bank's Tier 1 capital by its average total consolidated assets. Unlike the risk-based capital ratios that use risk-weighted assets, this calculation uses total assets, giving a straightforward measure of how much capital backs every dollar on the balance sheet.

The formula is straightforward:

Tier 1 Leverage Ratio = Tier 1 Capital / Average Total Consolidated Assets

The result is expressed as a percentage. A bank with $4.7 billion in Tier 1 capital and $48 billion in average total assets has a leverage ratio of 9.8%.

Breaking Down Each Component

Tier 1 capital is the same figure used in the Tier 1 capital ratio. It includes Common Equity Tier 1 (CET1) capital plus Additional Tier 1 (AT1) capital, after regulatory deductions for items like goodwill and deferred tax assets. Banks report this number directly in their regulatory disclosures, so you won't need to calculate it yourself.

Average total consolidated assets is where this ratio parts ways with the risk-based ratios. Instead of applying risk weights to different asset categories, the leverage ratio uses the simple average of total on-balance-sheet assets over the reporting period, typically a quarterly average of daily or monthly balances. Some regulatory adjustments apply, such as deducting goodwill and certain intangible assets from average assets to avoid double-counting deductions already taken from the numerator.

The calculation itself is just division. The real value is understanding what the result means and why regulators require this ratio alongside the risk-based measures.

Why Total Assets Instead of Risk-Weighted Assets

The CET1, Tier 1, and Total Capital ratios all use risk-weighted assets in the denominator. Each asset on a bank's balance sheet gets assigned a risk weight: 0% for U.S. Treasuries, 20% for claims on other banks, 50% for certain residential mortgages, 100% for commercial loans. The theory is that riskier assets should require more capital backing.

The problem is that risk weights don't always capture true risk accurately. A bank could load up on assets that carry low regulatory risk weights but still present meaningful real-world risk. Before the 2008 financial crisis, some banks appeared well-capitalized on a risk-weighted basis while holding very thin capital relative to their total balance sheets. Post-crisis reforms strengthened the leverage ratio specifically to close this gap.

The leverage ratio acts as a floor. No matter how favorable a bank's risk-weight mix looks, it still needs a minimum amount of capital relative to its total assets.

Regulatory Thresholds

Banks face two key leverage ratio thresholds:

4.0% for "adequately capitalized" status

5.0% for "well-capitalized" status

Falling below 4.0% triggers prompt corrective action from regulators, which can include restrictions on dividends, asset growth, and executive compensation. Most banks operate well above these floors, with leverage ratios typically between 8% and 10%.

The gap between the regulatory minimum and where banks actually operate tells you something about industry practice. A bank running at 5.5% is technically well-capitalized but leaves little room for unexpected losses or regulatory changes. A bank at 9% has substantial cushion. Where a bank sits within that range reflects both its risk appetite and its strategic priorities around capital deployment.

The Community Bank Leverage Ratio

Community banks with less than $10 billion in total assets can opt into the Community Bank Leverage Ratio (CBLR) framework. Under CBLR, a bank that maintains a leverage ratio of at least 9.0% is considered well-capitalized and is exempt from calculating the risk-based capital ratios entirely. This simplifies regulatory compliance significantly for smaller banks that don't have complex asset portfolios requiring detailed risk-weight calculations.

For investors analyzing community banks, checking whether a bank uses the CBLR framework matters. A CBLR bank reporting a 9.5% leverage ratio has met all its capital requirements with that single number. A non-CBLR bank with the same leverage ratio still needs to separately meet CET1, Tier 1, and Total Capital ratio minimums.

How This Compares to Equity-to-Assets

The leverage ratio looks a lot like the equity-to-assets ratio, but there are meaningful differences. Equity-to-assets uses total shareholders' equity (an accounting number from the balance sheet) divided by period-end total assets. The leverage ratio uses Tier 1 capital (a regulatory number that adjusts equity for items like goodwill and deferred tax assets) divided by average total assets.

For most banks, the two ratios track closely. Differences show up when a bank has large amounts of goodwill from acquisitions (which reduces Tier 1 capital relative to book equity) or significant unrealized securities losses flowing through accumulated other comprehensive income (AOCI), which may or may not affect Tier 1 capital depending on the bank's regulatory election.

Common Mistakes When Analyzing This Ratio

Using period-end assets instead of average assets is the most frequent error. The leverage ratio specifically calls for average total consolidated assets, not the balance sheet figure at quarter-end. For banks with seasonal fluctuations or rapid growth, the difference between average and period-end can move the ratio noticeably.

Another common mistake is confusing the Tier 1 leverage ratio with the supplementary leverage ratio (SLR). The SLR applies only to the largest banks and adds off-balance-sheet exposures to the denominator, making it a stricter measure. When a large bank reports both ratios, the SLR will always be lower because the denominator is larger.

Finally, comparing leverage ratios across banks without considering asset composition can be misleading. A bank with a 10% leverage ratio built heavily around low-risk government securities is in a very different position than a bank with a 10% leverage ratio concentrated in commercial real estate lending, even though the number looks identical.

Where to Find the Numbers

Banks report the Tier 1 leverage ratio in quarterly earnings releases, usually in a capital ratios table alongside the CET1, Tier 1, and Total Capital ratios. The same data appears in regulatory filings: Call Reports for individual banks and FR Y-9C filings for bank holding companies.

Average total assets is disclosed in these same filings and typically also appears in earnings supplement documents. If you want to verify the reported ratio, you can divide the Tier 1 capital figure by average total assets from the same filing period. Small rounding differences are normal.