Marriage Tax Calculator (Penalty or Bonus?)

"Does it cost money to get married?" is a genuinely American tax question, because the US taxes couples on a joint return while also taxing individuals. The federal code mostly doubles everything for joint filers — the 2026 standard deduction goes from $16,100 to exactly $32,200, and most brackets come close to doubling. The comparison below runs both scenarios with the exact 2026 brackets: each of you as a single filer, then the two of you combined on one joint return.

Marriage BONUSES happen when one spouse earns much more than the other. The joint brackets are wider than one earner's single brackets, so the higher earner's top dollars drop into lower-rate space the lower earner wasn't using. A $95K + $30K couple saves roughly $2,850 a year by filing jointly. Marriage PENALTIES hit equal high earners: the joint 37% bracket starts at $768,700 — well under twice the single $640,600 — so two equal high earners reach the top bracket sooner married than apart.

The 0.9% additional Medicare tax has its own marriage wrinkle, and the calculator includes it. As singles, each spouse pays it on wages over $200,000. Married, the threshold is $250,000 on COMBINED wages — so two $130,000 earners pay $90 as a couple and $0 as two singles, while a $320K + $0 couple pays $630 jointly instead of $1,080 as individuals. High-earning couples also cross the 3.8% Net Investment Income Tax thresholds the same way ($200K single vs $250K joint) on investment income.

Two things this comparison deliberately leaves out. Social Security (6.2%) and base Medicare (1.45%) are withheld per person on the same wages either way, so they cancel out. And state income tax adds its own layer — a handful of states don't double their brackets for joint filers, while community-property and 0%-tax states change the picture entirely. If the federal verdict is close, your state can decide which filing status actually wins.