Married couples can file jointly, which often lowers their tax bill through a larger standard deduction and more favorable brackets, though some couples face a marriage penalty.
Main tax benefits
- Larger standard deduction for joint filers (double the single amount).
- Wider tax brackets than single filers at lower rates.
- Spousal IRA contributions.
- Eligibility for credits such as the Earned Income Tax Credit and child credits.
- Estate and gift tax: unlimited marital deduction.
Marriage penalty
At very high incomes or in cases where both earn similar amounts, couples may pay more. Some credits phase out for joint filers.
Marriage bonus
Most common when one spouse earns much more.
Filing options
Married filing jointly or separately.
Check
Use IRS tools or a tax professional.
Main tax benefits of marriage
- Larger standard deduction: $29,200 for married couples filing jointly in 2024, double the $14,600 for single filers.
- Wider tax brackets: the 12% and 22% brackets for joint filers are about twice the width of single brackets, so a lower earner can use the lower brackets of a higher earning spouse.
- Spousal IRA: a non-working spouse can contribute to an IRA based on the working spouse’s income, up to $7,000 in 2024.
- Gift and estate tax: unlimited transfers between spouses, and a larger estate tax exemption through portability.
- Higher income limits for credits and deductions, such as the child tax credit phase-out starting at $400,000 for joint filers.
- Employer health insurance for a spouse can be pre-tax.
- Social Security spousal and survivor benefits.
Marriage penalty
A marriage penalty happens when a couple owes more tax filing jointly than they would as two single people. It is most common when both partners earn high and similar incomes. Brackets for joint filers double up to 32% bracket thresholds, but at the top 37% bracket, the threshold for joint filers ($731,200 in 2024) is only 1.2 times single ($609,350). The state and local tax deduction cap of $10,000 applies equally to singles and couples, which creates a penalty too. Low-income couples can lose benefits like the Earned Income Tax Credit.
Marriage bonus
A bonus arises when one spouse earns much more than the other. Combining incomes lets the larger income be taxed partly at lower brackets. Many couples receive a bonus.
Filing options
- Married filing jointly: most common, with the largest benefits.
- Married filing separately: used when one spouse has large medical bills, liability concerns or student loan income-based repayment benefits. It limits some credits.
- Head of household can apply to a married person who lived apart from a spouse for the last 6 months of the year and has a qualifying child.
You are treated as married for the whole year if married on December 31.
Check
Run the numbers using the IRS Tax Withholding Estimator or tax software for both joint and separate options. Update your W-4 forms after marriage, and report name changes to the Social Security Administration.
Tax numbers for married couples
For tax year 2025, the standard deduction is 30,000 USD for married filing jointly, compared with 15,000 USD for single filers. The 12 percent bracket for joint filers extends to 96,950 USD of taxable income, double the single bracket in lower brackets. Married couples can also contribute to spousal IRAs, transfer assets without gift tax, and use the unlimited marital deduction for estate taxes. The marriage penalty can apply at very high incomes and in some credits, and the SALT deduction cap applies per return. The IRS lets couples compare filing jointly with filing separately, which is rarely better but can help with income-driven student loan payments.
Based on data from the IRS
