Marriage Tax Calculator (Penalty vs Bonus)
2026Calculate whether marriage will increase or decrease your combined tax bill. Compare filing single vs married jointly.
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
This calculator determines if a married couple pays more (a 'marriage penalty') or less (a 'marriage bonus') in federal income taxes compared to if they remained single. This is crucial for financial planning, especially when considering marriage or understanding the tax implications of filing jointly versus separately.
The calculator sums the individual tax liabilities if each person filed as 'Single' and compares it to the tax liability if they filed 'Married Filing Jointly' (MFJ). It uses the applicable tax brackets, standard deductions, and credits for both scenarios to find the difference.
Remember that a marriage penalty or bonus can vary significantly based on income levels and how disparate individual incomes are. Don't forget to account for potential changes in deductions and credits when filing jointly, which can significantly impact the outcome.
Example: $150,000 Combined Income
- 1 Input: Person A income $80,000, Person B income $70,000. Assume both take standard deduction, no other credits. Filing year 2023.
- 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 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 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?
Who gets a marriage tax bonus?
Can married couples file separately to avoid the penalty?
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