Marriage Tax Calculator
$0.00 marriage tax penalty
What Is the "Marriage Tax" Penalty or Bonus?
The U.S. federal income tax uses different bracket widths for single filers versus married couples filing jointly. When two spouses have similarly sized incomes, the married-filing-jointly brackets don't always give them twice the room of the single brackets at higher income levels, which can push combined income into higher brackets than either spouse would hit alone — a "marriage penalty." Conversely, when one spouse earns much more than the other (or one has little to no income), filing jointly usually pulls the higher earner's income into lower brackets, creating a "marriage bonus." This calculator compares your combined tax bill filing jointly against the sum of what each spouse would owe filing separately as single individuals, using 2026 federal ordinary income tax brackets and the standard deduction. It assumes each spouse takes the standard deduction and applies no credits, adjustments, or additional income like capital gains — enter income already net of any above-the-line deductions for the closest estimate.
Why This Happens at Some Incomes and Not Others
The penalty or bonus isn't constant — it depends heavily on how income is split between spouses. Two people earning close to the same amount are more likely to see a penalty once combined income crosses into the higher brackets, since the joint brackets for the top rates are narrower than double the single brackets. A single-earner household or a couple with a large income gap almost always sees a bonus, because the joint standard deduction is double the single deduction and more income gets taxed at the lower joint bracket rates. Running your numbers both ways, as this tool does, is the only reliable way to know which side of that line you fall on.
Planning Around It
If you're comparing this to your actual take-home pay, the income tax calculator can walk through a single filing scenario in more detail, including other income types and deductions. For a fuller picture of joint household cash flow after taxes, the salary calculator can help translate gross pay into what actually lands in your accounts each pay period.
Frequently Asked Questions
Why would getting married increase my taxes?
It happens mainly when both spouses earn similar, moderate-to-high incomes. The married-filing-jointly tax brackets aren't always exactly double the single brackets at every income level, so combining two similar incomes can push more of your money into a higher bracket than either of you would hit filing separately as single people.
Does this calculator include deductions other than the standard deduction?
No. It applies only the federal standard deduction for each scenario and taxes the remainder at ordinary income brackets, with no credits, itemized deductions, capital gains, or state taxes factored in. If you itemize or have significant investment income, your actual results will differ from this estimate.