Method
The calculator estimates separate tax for each person using entered effective rates, then compares it with a joint effective-rate estimate after entered joint credits or deductions.
Example
If two people earn $70,000 and $50,000, their separate tax at 22% and 18% is $24,400 total. A joint 20% effective rate on $120,000 is $24,000, giving a $400 estimated bonus before other rules.
Common mistakes
Use effective rates for the whole tax bill, not marginal bracket rates. Credits, deductions, benefits and local rules can change the answer.
Limitations
Marriage taxation depends on jurisdiction, brackets, credits, household structure, benefits, deductions and filing status rules. This is not tax advice or filing guidance.
References
- OECD: Taxing Wages methodology overview, accessed 2026-05-17.
Last reviewed: 2026-05-17