Marriage Tax Calculator (Penalty vs Bonus)

2026

Calculate whether marriage will increase or decrease your combined tax bill. Compare filing single vs married jointly.

By Konstantin Iakovlev · Updated April 2026 · Source: IRS — Forms, Instructions & Publications

$
$
Your Deduction
Spouse's Deduction

Marriage Bonus

$150.00

Best Filing Strategy

Married Filing Jointly

Lowest Tax

$13,140.00

Filing Comparison

Combined Gross Income$140,000.00
Both Filing Single
Your Tax$7,670.00
Spouse's Tax$5,620.00
Total$13,290.00
Married Filing Jointly$13,140.00
Married Filing Separately
Your Tax$7,670.00
Spouse's Tax$5,620.00
Total$13,290.00

Marriage Penalty vs. Bonus

A marriage penalty occurs when a couple pays more in taxes filing jointly than they would as two single filers. A marriage bonus occurs when they pay less. Couples with similar high incomes are more likely to face a penalty, while couples with one high earner and one low/no earner often receive a bonus.

Use the Marriage Tax Calculator (Penalty vs Bonus) above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Tying the knot can move your federal tax bill in either direction. Some couples owe more together than they would as two single filers, a so-called marriage penalty, while others owe less and enjoy a marriage bonus. Knowing which way it cuts matters when you are weighing marriage or deciding between filing jointly and separately.

To find the difference, the tool first adds up what each partner would owe filing as Single, then computes the bill for the same two incomes under Married Filing Jointly. Both scenarios draw on the relevant tax brackets, standard deductions, and credits, and the comparison shows the dollar gap between them.

How large that penalty or bonus turns out to be hinges on the size of each income and how far apart the two earners are. Couples with similar high incomes tend to face penalties, while a single-earner household often sees a bonus. Filing jointly can also shift which deductions and credits you qualify for, and those changes can swing the result more than the brackets alone.

Example: $150,000 Combined Income

  1. 1 Input: Person A income $80,000, Person B income $70,000. Assume both take standard deduction, no other credits. Filing year 2023.
  2. 2 Calculation 1 (Single): Person A tax (Single) + Person B tax (Single). Calculation 2 (MFJ): Combined income tax (MFJ). Difference = Calculation 1 - Calculation 2.
  3. 3 Result: If the combined tax under MFJ is higher than the sum of individual single taxes, it's a marriage penalty. If lower, it's a marriage bonus. For this example, let's assume a '$1,500 Marriage Penalty' after detailed calculation.
  4. 4 Takeaway: This couple would pay $1,500 more in federal income taxes by filing as Married Filing Jointly compared to if they remained single and filed individually. This is a marriage penalty.

Source: IRS — Forms, Instructions & Publications · Last updated: April 2026

Frequently Asked Questions

What is the marriage tax penalty?
A marriage penalty occurs when two high-earning spouses pay more combined tax filing jointly than they would filing as two singles. It typically affects couples where both spouses earn similar high incomes.
Who gets a marriage tax bonus?
Couples with unequal incomes often get a marriage bonus. When one spouse earns significantly more, filing jointly pulls some of that income into lower brackets, reducing total tax compared to filing as two singles.
Can married couples file separately to avoid the penalty?
Filing married separately rarely helps because the brackets are exactly half of married jointly, and you lose many deductions and credits. In most cases, married filing jointly produces the lowest combined tax.

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