Marriage tax calculator.
Compare estimated unmarried tax with married filing jointly to see a possible marriage bonus or penalty.
Marriage Tax Calculator inputs
Enter income, deductions, dependents, and filing assumptions for each spouse.
Spouse 1
Enter major income, deduction, and filing assumptions for spouse 1 before marriage.
Spouse 2
Enter major income, deduction, and filing assumptions for spouse 2 before marriage.
Shared assumptions
State/city tax is shown as a separate estimate and is not included in federal bracket math.
Visual breakdown
Live labels, comparison cards, charts, and schedule outputs update as you change the inputs.
Schedule graph
Shows the value path over time.
Schedule
Detailed rows for the first periods and final result.
About the Marriage Tax Calculator
This calculator estimates the federal tax impact of filing as a married couple compared with filing as two separate unmarried taxpayers. It models major income categories, retirement savings, filing status before marriage, dependents, deductions, state/local tax assumptions, and self-employment assumptions.
Separate vs. joint
The calculator compares estimated tax before marriage with estimated tax after filing a married joint return.
Income mix
Wages, business income, interest, dividends, rental income, short-term gains, and long-term gains can affect the comparison.
Deductions
Use standard deduction or itemized deduction assumptions for each spouse and the joint return estimate.
How to use this calculator
Enter income, deductions, filing status, dependents, retirement savings, and self-employment assumptions for each spouse. The calculator estimates the combined tax if unmarried and compares it with a married filing jointly estimate.
Marriage bonus and marriage penalty
A marriage bonus can happen when joint brackets and deductions reduce the combined tax. A marriage penalty can happen when two incomes combine into higher brackets or reduce eligibility for credits and deductions.
Related calculators
Income Tax Calculator · Take-Home Paycheck Calculator · Salary Calculator
⚠ Disclaimer: This is a simplified federal tax planning estimate. It does not replace tax software, a tax professional, or IRS guidance. Actual taxes may differ because of credits, AMT, phaseouts, state rules, filing status details, and other tax items.
Marriage Tax Calculator FAQ
Common questions about inputs, assumptions, outputs, schedules, and limitations.
What does the Marriage Tax Calculator estimate?
It estimates whether filing jointly after marriage may create a tax bonus or penalty compared with the spouses filing separately as unmarried taxpayers.
What is a marriage bonus?
A marriage bonus occurs when a married couple pays less tax filing jointly than the two people would pay as unmarried filers.
What is a marriage penalty?
A marriage penalty occurs when the joint tax is higher than the combined tax that two comparable unmarried filers would pay.
Does the calculator include married filing separately?
No. It focuses on the common comparison between unmarried filing statuses and married filing jointly.
Is this a precise tax filing result?
No. It is an educational estimate using simplified assumptions and should not be used as a tax return.