Finance
Income tax estimate
Estimate income tax using an effective tax rate supplied by the user.
Calculators / Finance / Marriage tax comparison
Marriage tax comparison calculator
Compare two individual tax estimates with a combined-filing estimate using rates you provide.
On this page
Estimated tax filed separately18,800
Estimated combined tax18,700
Combined minus separate-100
Calculator controls
How to calculate
Compare two individual tax estimates with a combined-filing estimate using rates you provide.
Estimated tax filed separately = income1*rate1/100+income2*rate2/100; Estimated combined tax = (income1+income2)*combined/100; Combined minus separate = (income1+income2)*combined/100-(income1*rate1/100+income2*rate2/100)
Worked example
Income 1: 60000; Income 2: 50000; Individual rate 1 (%): 18; Individual rate 2 (%): 16; Combined effective rate (%): 17.
Estimated tax filed separately: 18,800 ; Estimated combined tax: 18,700 ; Combined minus separate: -100 .
Assumptions and limits
This does not calculate any country’s tax law. Use current official effective-tax estimates and include credits, deductions and filing rules separately.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Compare two individual tax estimates with a combined-filing estimate using rates you provide. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the marriage tax comparison to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Income 1 | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Income 2 | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Individual rate 1 (%) | Enter a number of at least 0 and no more than 100. |
| Individual rate 2 (%) | Enter a number of at least 0 and no more than 100. |
| Combined effective rate (%) | Enter a number of at least 0 and no more than 100. |
Frequently asked questions
What should I check before using the marriage tax comparison result?
This does not calculate any country’s tax law. Use current official effective-tax estimates and include credits, deductions and filing rules separately.
Is this marriage tax comparison result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.