Marginal vs Effective Tax Rate: What You Actually Pay
Your marginal tax bracket is not your real tax rate. Learn how to calculate your effective tax rate and plan smarter.
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Key Takeaways
- 1Marginal rate = tax on your last dollar. Effective rate = total tax ÷ total income.
- 2Effective rate is always lower than your top marginal bracket.
- 3A raise never reduces take-home pay — the bracket myth is false.
- 4401(k) contributions reduce taxable income at your marginal rate.
Most people overestimate their tax rate because they confuse marginal bracket with effective rate. This leads to bad decisions about Roth vs traditional, side income, and overtime.
Estimate your real rate with our tax planning calculator.
Marginal Tax Rate
The rate on your highest dollar of income. If you earn $90,000 taxable, your marginal rate might be 22% — but only income above $47,150 (single) is taxed at 22%.
Financial decisions at the margin (401k contribution, overtime) should use marginal rate.
Effective Tax Rate
Total tax paid ÷ total gross income. A single filer earning $90,000 might pay $13,000 in federal tax — 14.4% effective rate despite a 22% marginal bracket.
Use effective rate for budgeting take-home pay.
Planning Implications
401(k) saves at marginal rate; withdrawals taxed at marginal rate in retirement. Choose Roth vs traditional based on current vs future marginal rates.
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