Effective vs Marginal Tax Rate
Tax Glossary Term
Definition
The effective tax rate and the marginal tax rate are two ways to express your tax burden that measure different things. The effective rate is the average percentage of your total income paid in tax (total tax divided by total income). The marginal rate is the percentage applied to the next dollar you earn, determined by which tax bracket that dollar falls into. In 2026, a single filer's first 12,400 of taxable income is taxed at 10.0%, the next slice up to 50,400 at 12.0%, and income from 50,400 to 105,700 at 22.0%. In this progressive system the marginal rate is always higher than the effective rate because only income above each bracket threshold is taxed at the higher rate. Understanding the difference prevents the common mistake of thinking all income is taxed at your "bracket" rate. Two taxpayers can share the same marginal bracket yet have very different effective rates depending on how much of their income falls in lower brackets. Financial decisions, such as whether to take on extra work, realize a capital gain, or convert a traditional IRA, should be evaluated against the marginal rate (the rate on the next dollar), while the effective rate gives you the big-picture view of your overall burden.
Example
Single filer, $80,000 taxable income in 2026:
10.0% on first $12,400 = $1,240
12.0% on $12,400 – $50,400 = $4,560
22.0% on $50,400 – $80,000 = $6,512
Total tax: $12,312
Marginal rate: 22.0% (the bracket the last dollar falls in)
Effective rate: $12,312 / $80,000 = 15.4%