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The Tax Math Notebook

Effective Tax Rate Calculator . com

An independent, educational reference for the United States effective tax rate. Worked arithmetic, current brackets, and footnoted sources. Not affiliated with the IRS or any tax authority.

Chapters

How to Calculate
Marginal vs Effective
Tax Brackets
By Income
Lower Your Rate
Self-Employed
Deductions and Credits
Marginal Calculator
Worked Examples

More Tax and Finance Calculators

Salary Calculator After Taxes
California Paycheck Calculator
Cost of Living by State

Sources

IRS Revenue Procedure 2024-61 (2025 brackets)
Inflation-projected 2026 brackets, ~1.7%
SSA wage base 2026: $168,600

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