Effective Tax Rate Calculator

May 8, 2026

A single filer earning $100,000 might sit in the 22% federal bracket – yet hand over only $13,880 to the IRS. That 13.88% is the effective tax rate, the single number that tells you what share of your income actually goes to taxes. An effective tax rate calculator turns two figures into that percentage in seconds.

What Is the Effective Tax Rate?

The effective tax rate (ETR) is the average percentage of your taxable income paid in taxes. It accounts for every bracket your income passes through, not just the highest one. Because the U.S. uses a progressive system – where the first dollars are taxed at lower rates – the effective rate is always lower than the marginal rate.

Another term for the same concept is average tax rate. Both refer to the ratio of total tax liability to taxable income.

How to Calculate Effective Tax Rate

The effective tax rate formula is straightforward:

Effective Tax Rate = (Total Tax Paid ÷ Taxable Income) × 100

Total Tax Paid – your federal income tax liability after credits, found on Form 1040, line 24.
Taxable Income – your income after all deductions and adjustments, found on Form 1040, line 15.

Step-by-Step Example

Taxable income: $85,000 (after the standard deduction)
Federal tax liability (2025 brackets, single filer):
- 10% on first $11,925 = $1,192.50
- 12% on $11,926–$48,475 = $4,386.00
- 22% on $48,476–$85,000 = $8,045.50
- Total tax = $13,624.00
Effective tax rate = ($13,624 ÷ $85,000) × 100 = 16.03%

Despite being in the 22% bracket, this filer’s effective rate is only 16.03%.

Effective Tax Rate vs. Marginal Tax Rate

Aspect	Effective Tax Rate	Marginal Tax Rate
Definition	Average rate across all income	Rate on your last dollar earned
Formula	Total Tax ÷ Taxable Income	Based on the bracket your top income falls into
Value	Always lower (or equal)	Always higher (or equal)
Use case	Understanding actual tax burden	Evaluating the tax cost of earning more

The marginal rate answers: “If I earn one more dollar, how much tax does it attract?” The effective rate answers: “Overall, what fraction of my income goes to taxes?”

What Affects Your Effective Tax Rate

Several factors push your effective rate up or down from the baseline bracket structure:

Filing status – Married Filing Jointly brackets are roughly double the Single brackets at lower levels, which can lower the effective rate for dual-income households.
Deductions – The standard deduction ($15,000 for single filers in 2025) or itemized deductions reduces taxable income before brackets apply, lowering the effective rate.
Tax credits – Child Tax Credit, Earned Income Credit, and education credits reduce total tax directly, pulling the effective rate down further.
Capital gains and dividends – Taxed at preferential rates (0%, 15%, or 20%), which can lower the overall effective rate for taxpayers with significant investment income.
State and local taxes – Adding state income tax liability raises your combined effective rate. A filer with a 14% federal ETR and 5% state rate has a 19% combined ETR.

2025–2026 Federal Income Tax Brackets (Single Filers)

Rate	Taxable Income Range
10%	$0 – $11,925
12%	$11,926 – $48,475
22%	$48,476 – $103,350
24%	$103,351 – $197,300
32%	$197,301 – $250,525
35%	$250,526 – $626,350
37%	Over $626,350

Bracket thresholds shift annually with inflation. Many provisions of the Tax Cuts and Jobs Act (TCJA) are scheduled to sunset after 2025, which could revert brackets to pre-2018 levels for 2026. Verify the current brackets on IRS.gov before filing.

How to Use the Calculator Above

The calculator requires two inputs:

Taxable income – your income after deductions (Form 1040, line 15).
Total tax paid – your federal income tax after credits (Form 1040, line 24).

Enter both values and the calculator divides total tax by taxable income, then multiplies by 100 to display your effective tax rate as a percentage.

For a more complete picture, you can add your state income tax to the “total tax paid” field. This produces a combined effective rate covering both federal and state obligations.

Why Your Effective Tax Rate Matters

Knowing your ETR helps with real financial decisions:

Estimating next year’s bill – Multiply your projected taxable income by the current effective rate for a quick ballpark of federal tax.
Comparing job offers – A higher salary in a higher-tax state might yield less after-tax income than a lower salary in a no-tax state. The combined ETR reveals the difference.
Retirement planning – Projecting withdrawals against expected effective rates helps estimate how much retirement income you’ll keep.
Investment strategy – If your effective rate is low, tax-deferred accounts offer less benefit than if your rate is high.

Tax rules change frequently. The figures and brackets shown are based on 2025 IRS data; consult a tax professional or the IRS website for 2026 values.

Frequently Asked Questions

Is effective tax rate the same as average tax rate?

Yes. Effective tax rate and average tax rate mean the same thing – the percentage of your total taxable income that goes to taxes. Both are calculated by dividing total tax paid by taxable income.

Can my effective tax rate be higher than my marginal rate?

No. Because progressive tax systems apply lower rates to earlier portions of income, your effective rate will always be lower than – or equal to – your top marginal rate. It can never exceed it.

Does the effective tax rate include Social Security and Medicare?

The standard effective tax rate covers federal income tax only. FICA taxes (Social Security and Medicare) are calculated separately. Some expanded calculations add FICA and state taxes for a total effective rate.

Why is my effective tax rate so much lower than my tax bracket?

Your tax bracket shows the marginal rate on your last dollars earned. Because lower brackets fill up first at reduced rates (10%, 12%), your overall percentage – the effective rate – comes out significantly lower.

Should I use taxable income or gross income in the formula?

Use taxable income (after deductions and adjustments). This is the income figure the tax brackets actually apply to, and it gives the most accurate picture of your real tax burden relative to the income being taxed.

How do state taxes affect my effective tax rate?

State and local income taxes increase your total tax burden, raising your combined effective rate. To account for them, add your state and local tax liabilities to the numerator of the effective tax rate formula.