ReckonBoxDoes getting married raise or lower your tax?
A marriage tax calculator compares your federal income tax as a married couple against what two single people would pay, and the difference is a penalty or a bonus. For most couples today it is a bonus, which is the opposite of the old reputation.
On $120,000 and $30,000 of income, a couple pays $15,340 filing jointly for 2026 against $18,990 as two single filers, a $3,650 bonus. The bonus comes from the gap between the two incomes, and it is the common case, not the exception.
Why most couples now get a bonus
Since the 2017 tax law, the married-filing-jointly standard deduction and the brackets through the 32% rate are exactly double the single figures, which erased the marriage penalty for most incomes. The old penalty came from brackets that were less than double; that is mostly gone.
Two people earning $80,000 each pay the same tax married or single for 2026, a clean wash, because every bracket they touch is doubled. A couple with one higher earner does better still: the higher income effectively fills the lower joint brackets the smaller earner leaves empty. The simple calculators report the dollar figure and stop. The reason is worth seeing.
Where the penalty still lives
The rate-schedule marriage penalty now falls almost entirely on very high earners, because the 37% bracket is the one threshold that is not doubled for joint filers. It starts at $768,700 for a couple, far below twice the $640,600 single figure.
So two people earning $500,000 each pay about $3,982 more filing jointly for 2026, pushed into the top rate sooner than they would be alone. Below that level the doubled brackets keep the couple whole. The contrast is sharp:
| Two incomes (2026) | As two singles | Filing jointly | Result |
|---|---|---|---|
| $120,000 and $30,000 | $18,990 | $15,340 | $3,650 bonus |
| $80,000 and $80,000 | wash | wash | no difference |
| $500,000 and $500,000 | $276,269 | $280,251 | $3,982 penalty |
Where the numbers come from
The calculator figures your federal income tax twice for 2026. As two singles, each income gets the $16,100 standard deduction and runs through the single brackets. As a married couple, the combined income gets the $32,200 deduction and the joint brackets. The married tax minus the two single taxes is the penalty if positive, the bonus if negative.
The 2026 single brackets run 10% to $12,400, then 12%, 22%, 24%, 32%, 35%, and 37% above $640,600, per the Tax Foundation and the IRS. The joint brackets double each single threshold up to the 37% rate, which is why the math comes out the way it does.
What this does not cover
This isolates the federal rate-schedule effect on wages, which is the heart of the marriage question, and deliberately leaves the rest out. It does not model state income tax, which has its own marriage penalties in many states, the child tax credit, itemized deductions, the earned income credit, or investment income, each of which can add a penalty or bonus of its own. It also assumes the standard deduction rather than itemizing.
None of this is advice on whether or when to marry, which no tax table should drive. It shows one piece of the financial picture clearly. For a full return and your own situation, a CPA or tax adviser is the right call.
Frequently asked questions
What is the marriage tax penalty and bonus? A marriage penalty is when a couple pays more federal income tax filing jointly than they would as two singles, and a bonus is when they pay less. On $120,000 and $30,000 of income, a couple gets a $3,650 bonus for 2026, paying $15,340 jointly against $18,990 as two single filers. Couples with disparate incomes tend to get a bonus.
Do married couples pay more or less in taxes? Most pay less, because since the 2017 tax law the married-filing-jointly standard deduction and the brackets through 32% are exactly double the single ones. On two equal $80,000 incomes for 2026, the tax is identical either way, a wash. Couples with one higher earner usually get a bonus, and only very high earners face a penalty in the rate schedule.
When do married couples face a marriage penalty? The rate-schedule penalty now falls almost entirely on very high earners, because the 37% bracket starts at $768,700 for joint filers, well below twice the $640,600 single threshold. Two people earning $500,000 each pay about $3,982 more filing jointly for 2026. At lower incomes the doubled brackets remove the penalty.
Why do couples with similar incomes get penalized? Because combining two similar incomes can push the total into higher brackets sooner than each would reach alone, wherever the joint bracket is not exactly double the single one. For 2026 that only happens above the 35% bracket, so similar high incomes can face a penalty while similar middle incomes come out even.
How is the marriage penalty calculated? The calculator figures your federal income tax two ways for 2026: as two single filers, each with the $16,100 standard deduction and the single brackets, and as a married couple with the $32,200 deduction and the joint brackets. The difference is the penalty if positive or the bonus if negative. It covers wages and the standard deduction, not credits or state tax.
Does this include state taxes or tax credits? No, it compares federal income tax on wages using the standard deduction only, so it isolates the marriage effect in the rate schedule. It does not model state income tax, the child tax credit, itemized deductions, or investment income, each of which can add its own marriage penalty or bonus on top of the federal rate-schedule effect shown here.