Effective Tax Rate Calculator: Tax as a Share of Income
Work out your effective tax rate — the real share of your income that goes to tax, once the whole return is settled.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Effective tax rate | Income kept |
|---|---|---|
| $13,500 tax · $75,000 income | 18.00% | 82.00% |
| $6,000 tax · $48,000 income | 12.50% | 87.50% |
| $52,000 tax · $200,000 income | 26.00% | 74.00% |
| $2,400 tax · $32,000 income | 7.50% | 92.50% |
How This Calculator Works
Enter the total income tax you paid and your total income for the year. The calculator divides one by the other to give the effective tax rate, and shows the complement — the share of income you kept.
The Formula
Part as a Percentage of a Whole
Part is the portion, Whole is the total it belongs to
Worked Example
Tax of $13,500 on $75,000 of income is an 18% effective tax rate, leaving 82% of income kept. That 18% is well below the top marginal rate, because lower brackets and deductions pull the average down.
Key Insight
The effective tax rate is almost always lower than the marginal rate — the rate on your last dollar. A progressive system taxes early income at low rates, so the average across all of it is gentler than the top bracket suggests.
Frequently Asked Questions
What is an effective tax rate?
It is total tax paid as a percentage of total income — the average rate across all your income, after brackets, deductions, and credits.
How does it differ from the marginal rate?
The marginal rate is the rate on your next dollar of income. The effective rate averages tax across all income, so it is lower than the marginal rate.
Which income figure should I use?
Be consistent. Using gross income gives a lower effective rate; using taxable income gives a higher one. Pick one basis and note which it is.
Why is my effective rate lower than my bracket?
A progressive system taxes early income at low rates and only the top slice at your highest bracket. Averaging over all of it produces a lower effective rate.
Does this include payroll taxes?
Only if you include them in the tax paid. To capture the full tax burden, add income tax and payroll taxes together in the figure entered.
Related Calculators
Methodology & Review
The effective tax rate is total tax paid divided by total income, expressed as a percentage. The complement is the share of income kept. It is an average rate, not the top marginal rate.
Written by Ugo Candido · Last updated May 17, 2026.