Marriage penalty tax: who still pays it in 2026

Is there still a marriage penalty?

In the rate schedule, only at the top. The 2026 joint thresholds from Rev. Proc. 2025-32 are precisely twice the single ones for the 10% through 32% brackets: $24,800 vs $12,400, $100,800 vs $50,400, and so on up to $512,450 vs $256,225. The standard deduction is doubled too, $32,200 vs $16,100.

The break comes at the 35% band. A single filer stays at 35% up to $640,600, but a couple moves to 37% above $768,700 instead of $1,281,200. Any couple whose combined taxable income crosses $768,700, with both spouses earning a large share, pays a bracket penalty.

Where the 2026 brackets stop doubling

Worked example: two high earners

Each spouse earns $700,000 in wages and takes the standard deduction. As two single filers, each has $683,900 of taxable income and owes $209,000.25, for a combined $418,000.50. Filing jointly, their $1,367,800 of taxable income produces $428,250.50. The marriage penalty from brackets alone is $10,250, which is the $512,500 shortfall in the joint 35% band taxed at the extra 2%.

Payroll tax adds more. The 0.9% Additional Medicare Tax starts at $200,000 for a single person but $250,000 for a couple, so this pair owes $10,350 of it jointly instead of $9,000 as singles, another $1,350. Married filing separately rarely helps, because the separate-return brackets are cut to half the joint ones.

Credits and deductions with non-doubled limits

Most income limits now scale for couples: the Child Tax Credit phaseout starts at $200,000 single and $400,000 joint, and the new tips, overtime and senior deductions double their phaseouts too. These do not:

The SALT deduction cap is the one that bites most itemizers: two unmarried homeowners could each deduct up to $40,400, while a married couple shares one cap. The AMT exemption, $90,100 single vs $140,200 joint, is also well short of double; see alternative minimum tax rules.

Earned income credit and head of household

Lower-income couples can feel a penalty through the Earned Income Tax Credit. For 2026, a joint return with one child loses the credit at $58,863 of income, compared with $51,593 for a single filer, so two earners near the limit can lose a credit that one of them would have kept alone.

A single parent who marries also gives up head of household filing status. Example: a parent earning $60,000 as head of household owes $3,948 in 2026, and a partner earning $60,000 as a single filer owes $5,020, for $8,968 in total. Married, their $87,800 of joint taxable income produces $10,040, a $1,072 penalty that equals the head of household benefit they lost.

Marriage bonus cases

A marriage bonus is the opposite: the couple pays less together than apart. It is common when incomes are uneven, because the higher earner borrows the lower earner's unused brackets and standard deduction.

Example: one partner earns $150,000 in wages and the other has no income. Single, the earner has $133,900 of taxable income and owes $24,734. Married filing jointly, taxable income drops to $117,800 and tax to $15,340. The marriage bonus is $9,394 a year in federal income tax.

How to check your own marriage penalty

A marriage penalty calculator is just two calculations side by side. You can do it with our income tax calculator:

1. Figure each partner's tax as a single filer, or head of household if one qualifies, including credits.
2. Add the two results.
3. Figure the tax on a joint return with combined income and joint limits.
4. Compare. A higher joint number is your penalty; a lower one is your bonus.
5. Repeat with married filing separately if either spouse has large medical costs or income-driven loan payments, but expect that status to cost more in most cases.

Marital status on December 31 decides the whole year, so a wedding date in late December or early January shifts the result by a full tax year. Compare the joint and single tables in full on 2026 IRS tax brackets and federal tax brackets by year.