Marriage Tax Calculator
Compare estimated 2026 U.S. federal income tax for married filing jointly versus married filing separately using ordinary income and the standard deduction.
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Change any assumption and calculate again to compare results.
What the Marriage Tax Calculator Shows
This calculator is designed for a quick comparison of two common federal filing choices available to married taxpayers: married filing jointly and married filing separately. It uses the 2026 ordinary-income tax brackets and lets you start with each spouse’s income before the selected deduction.
The main result is the estimated difference between the combined separate-return tax and the joint-return tax. A positive difference means the simplified estimate favors filing jointly; a negative difference means the separate-return estimate is lower. This is often called a marriage bonus or marriage penalty, but the real return can differ once credits, deductions, investment income and special rules are included.
2026 Federal Tax Rules Used
For 2026, the standard deduction used here is $32,200 for married filing jointly and $16,100 for married filing separately. The calculator applies the published 2026 marginal brackets for those filing statuses. It is an educational estimator, not tax-preparation software.
Joint filing often produces a lower tax when one spouse earns much more than the other because the joint brackets can make better use of lower-rate ranges. When incomes are similar, the difference may be small. Separate filing can also change eligibility for credits and deductions, which this simplified model does not attempt to reproduce.
Example
Enter $85,000 for Spouse A and $45,000 for Spouse B. With the 2026 standard deduction, the calculator computes joint taxable income, two separate taxable incomes, the estimated tax under each method, and the dollar difference.
Use custom deductions only if you already know the deduction amount you want the comparison to use. Do not enter the standard deduction again when the standard option is selected.
Important Limitations
Federal filing status is more than a bracket comparison. Married filing separately can affect IRA deductions, student-loan deductions, credits, Social Security taxation and other provisions. Community-property rules may also matter in some states. Use the result as a planning estimate and verify an actual filing decision with current IRS instructions or a qualified tax professional.
Frequently Asked Questions
What does this marriage tax calculator compare?
It compares a simplified 2026 federal ordinary-income estimate for married filing jointly with the combined estimate for two married-filing-separately returns.
Does it include tax credits and state tax?
No. Credits, capital gains, self-employment tax, AMT, NIIT, state tax and many filing-status-specific rules are outside this quick comparison.
What 2026 standard deductions are used?
The calculator uses $32,200 for married filing jointly and $16,100 for each married-filing-separately return when standard deduction is selected.