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Marriage Tax Calculator

Whether marrying costs you tax or saves you tax.

Calculators Reviews Free · no sign-up
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Filing as two single people

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— + —

Filing jointly

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on combined income of —

Where the difference comes from

BracketTax as singlesTax filing jointly
This is an estimate using federal brackets and deductions only. Credits, state tax, self-employment tax and phase-outs all affect a real return, so treat the result as a comparison rather than a filing figure.

Marriage effect

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Combined income—
Income gap—
Tax as singles—
Tax filing jointly—
Effective rate as singles—
Effective rate jointly—
Top bracket jointly—

Quick Tool Overview

The Marriage Tax Calculator estimates federal tax as two single filers against filing jointly and reports the difference — a bonus or a penalty. Which one you get depends almost entirely on how similar the two incomes are.

What it does
Compares filing jointly against filing as two single people
You give it
Both incomes and your deduction choice
You get back
Tax owed each way and the bonus or penalty between them
Best for
Understanding the tax effect of marrying
Calculators Free, unlimited use No sign-up Runs in your browser

About the Marriage Tax Calculator

Enter both incomes and the calculator estimates the federal tax owed as two single filers against the tax owed filing jointly, and reports the difference: a marriage bonus if joint filing costs less, a marriage penalty if it costs more.

Which one you get depends almost entirely on how similar the two incomes are. When one partner earns much more than the other, joint filing pulls the higher income into lower brackets and usually produces a bonus. When both earn similar amounts, particularly at higher levels where the joint brackets stop being exactly double the single ones, the combined income can be pushed upward and produce a penalty. The calculator shows the bracket-by-bracket detail so the reason is visible, not just the result.

Key features of the Marriage Tax Calculator

Bonus and penalty both modelled

Unequal incomes usually produce a bonus; similar high incomes can produce a penalty.

Bracket-by-bracket detail

The reason for the result, not just the result, so you can see where the difference arises.

Standard or itemised

The deduction choice changes the comparison, so it is an input rather than an assumption.

Both filers shown separately

Each single-filer calculation is visible alongside the joint one.

Estimate framing

Presented as a comparison rather than a filing figure, since credits and state tax are not included.

How to use the Marriage Tax Calculator

  1. 1

    Enter both incomes

    Each partner taxable income for the year, before combining them.

  2. 2

    Choose the deduction

    The standard deduction, or itemised amounts if you would itemise.

  3. 3

    Compare the two outcomes

    Total tax as two single filers against total tax filing jointly.

  4. 4

    Read the bonus or penalty

    The difference between them, with the bracket detail that explains it.

Frequently asked questions

When a couple pays more tax filing jointly than they would as two single people. It arises mainly when both partners earn similar higher incomes, because the joint brackets are not always double the single ones.

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