Marriage Tax CalculatorFree online financial calculator — instant results, no sign-up
Marriage penalty or bonus for two incomes.
Estimates only, based on the inputs and assumptions shown. This is not financial, investment, tax, or legal advice. Prices, rates and local rules may change; crypto scenarios do not predict returns. Confirm important decisions with a qualified professional.
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About the Marriage Tax Calculator
This calculator compares the total US federal income tax two individuals would pay filing as separate single taxpayers versus filing jointly as a married couple. It determines whether marriage produces a net tax penalty or a marriage tax bonus based on their two incomes. Couples evaluate this to anticipate how their legal marital status affects their federal tax liability.
- Income 1
- Gross annual income for the first person, entered in US dollars. Must be zero or greater.
- Income 2
- Gross annual income for the second person, entered in US dollars. Must be zero or greater.
Formula and method
Single Taxable Income (each) = max(0, Income - Standard Deduction for Single) Combined Single Tax = fedTax(Single Taxable Income 1, Single) + fedTax(Single Taxable Income 2, Single) Joint Taxable Income = max(0, (Income 1 + Income 2) - Standard Deduction for Married Filing Jointly) Joint Tax = fedTax(Joint Taxable Income, Married Filing Jointly) Difference = |Joint Tax - Combined Single Tax|
- fedTax(taxable, status)Progressive federal income tax brackets applied to taxable income under the specified filing status
- Standard Deduction for SingleStandard deduction amount subtracted from individual income before applying single tax brackets
- Standard Deduction for Married Filing JointlyStandard deduction amount subtracted from combined income before applying joint tax brackets
- DifferenceAbsolute dollar amount labeled as a 'Marriage penalty' if Joint Tax exceeds Combined Single Tax, or a 'Marriage bonus' if Joint Tax is lower
The tool subtracts the single standard deduction from each individual income and applies the federal single tax brackets to find each person's tax, summing the two. It then combines the two incomes, subtracts the married filing jointly standard deduction, and applies the joint tax brackets. Finally, it subtracts the smaller total from the larger to display either a marriage penalty or a marriage bonus.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Income 190000 $
- Income 260000 $
Results
- Tax filing single (combined)$15,990.00
- Tax filing jointly$15,340.00
- Marriage bonus$650.00
How to use the Marriage Tax Calculator
- 1Subtract the single standard deduction from Income 1 and Income 2 separately (minimum zero) to find individual taxable incomes.
- 2Calculate individual federal taxes using single bracket rates and sum them to obtain the combined single tax liability.
- 3Add Income 1 and Income 2 together, subtract the married filing jointly standard deduction, and compute joint federal tax using joint brackets.
- 4Compare the two tax figures: if joint tax is higher, report the difference as a marriage penalty; if lower, report it as a marriage bonus.
Reading your result
A marriage bonus indicates that filing jointly lowers your total federal income tax compared to remaining single, which typically happens when one partner earns significantly more than the other. A marriage penalty indicates that combining incomes pushes portions of joint income into higher tax brackets, resulting in higher tax. An identical tax liability means marriage neither increases nor decreases your standard federal income tax.
Limitations
This calculation only covers standard federal income tax brackets and standard deductions. It does not account for state or local income taxes, itemized deductions, pre-tax deductions like 401(k) contributions, or income-tested credits such as the Earned Income Tax Credit (EITC) and Child Tax Credit.
Common questions
Why does a marriage bonus occur?+
A bonus commonly happens when there is an income disparity between partners. The higher earner's income effectively shifts into the wider married filing jointly lower tax brackets, lowering the household's effective tax rate.
When does a marriage penalty occur under current federal tax law?+
Because most tax brackets for married couples filing jointly are exactly double the single brackets, penalties at standard rates are rare until incomes reach the highest federal tax bracket (where the threshold is not double the single threshold) or when income-based phaseouts apply.
Can a married couple choose to file as Single to avoid a penalty?+
No. Under IRS rules, if you are legally married as of December 31 of the tax year, your filing status options are Married Filing Jointly or Married Filing Separately; you cannot choose Single.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
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Results are estimates for informational purposes and are not financial, medical or legal advice.