Most people confuse marginal and effective tax rates. Understanding the difference helps you make better financial decisions and stop dreading the next tax bracket.

Marginal vs. Effective Tax Rate

Marginal Tax Rate

The rate you pay on the last dollar of income — your highest tax bracket.

Many people fear 'moving into a higher bracket,' but only the income ABOVE the threshold is taxed at the higher rate. Your lower income is still taxed at lower rates.

Effective Tax Rate

Your total tax divided by total income — the average rate you actually pay.

Example: Single filer with $100,000 taxable income (2025):

$23,850 × 10% = $2,385
$49,075 × 12% = $5,889 (income from $23,851 to $96,950)
$3,050 × 22% = $671 (income from $96,951 to $100,000)
Total tax: $8,945
Effective rate: 8.9% (not 22%)

Why the Difference Matters

Decision Making

When evaluating a deduction, use your marginal rate to calculate the tax savings.

A $5,000 deduction for someone in the 22% bracket saves $1,100

Understanding Your 'True' Tax Burden

Use your effective rate for budgeting and comparison purposes.

Investment Decisions

The marginal rate is what matters for the next dollar of investment income.

Marginal Rates Include State Taxes

For complete analysis, add your state income tax rate to your federal marginal rate.

Chicago-area taxpayers: Federal 22% + Illinois 4.95% = 26.95% marginal rate

Want to understand your personal tax situation? Schedule a consultation and we'll walk through the numbers.

Understanding Marginal vs. Effective Tax Rate