Marriage changes your tax bracket and standard deduction, which usually means a larger refund

When you marry, the IRS treats your household differently. You can file as Married Filing Jointly (MFJ), which gives you a higher standard deduction than you'd get filing single. For the 2024 tax year, a married couple filing jointly gets a standard deduction of $29,200, compared to $14,600 for a single filer. That larger deduction means less of your income is taxable, which often results in a bigger refund if you've had taxes withheld from your paychecks.

However, marriage doesn't automatically mean a larger refund. The actual amount depends on how much each spouse earned, how much tax was withheld from both paychecks, and whether you have dependents or other deductions. Some couples find they owe money instead of getting a refund, especially if one spouse has a second job or side income and didn't adjust their withholding.

The key is that marriage gives you access to a filing status with a higher deduction threshold. Whether that translates to a bigger refund depends entirely on your specific income and withholding situation.

Key Takeaways

  • Married Filing Jointly gives you a standard deduction of $29,200 for 2024, compared to $14,600 for single filers, which can increase your refund.
  • A larger refund is not may provide—it depends on how much tax was withheld from both spouses' paychecks and your combined income.
  • Some married couples end up owing money instead of getting a refund if their withholding doesn't match their actual tax liability.
  • You can file as Married Filing Separately if that produces a better result, though this is rarely the case and requires calculating both ways.

How the standard deduction works for married couples

The standard deduction is the amount of income the IRS does not tax. When you file Married Filing Jointly, you get one combined standard deduction that applies to your household income. For 2024, that's $29,200. For 2025, it increases to $30,000.

If you were both single and filed separately, you'd each get $14,600 (2024) or $15,000 (2025). Combined, that's $29,200 or $30,000—the same total. The advantage of filing jointly is that you use one deduction against one combined income, which can lower your tax rate if one spouse earns significantly more than the other.

The standard deduction changes every year based on inflation. You can find the current year's amount on the IRS website or your tax software will explore it automatically.

When marriage increases your refund

Your refund grows when the combination of your standard deduction and any other deductions or credits you claim results in a lower tax bill than what was already withheld from your paychecks. Marriage can trigger this in a few ways.

If one spouse earned significantly more than the other, filing jointly may push some of that income into a lower tax bracket than it would occupy if you filed separately. If you have dependents, you may now have access to credits like the Child Tax Credit or the Earned Income Tax Credit, both of which reduce your tax bill and can generate a refund. If one spouse was not working or earned very little, the household's combined income may fall into a lower bracket overall.

The most common scenario: one spouse had taxes withheld at the single rate, and after marriage, filing jointly with a higher standard deduction means less tax was actually owed. The difference comes back as a refund.

When marriage does not increase your refund

Marriage can also result in a smaller refund or even a tax bill, depending on your circumstances. This happens most often when both spouses have similar incomes and both had taxes withheld as single filers. When you combine those incomes and file jointly, you may move into a higher tax bracket, meaning more tax is owed overall—even though your standard deduction is higher.

This is called the marriage penalty, and it affects some couples more than others. It's most noticeable when both spouses earn high incomes. The IRS does not adjust withholding automatically when you marry, so if you don't update your W-4 forms at work, you may find you owe money on April 15 instead of getting a refund.

Another scenario: if one spouse has a second job or freelance income, and no additional tax was withheld from that income, the household's total tax liability may exceed what was withheld from the primary job. Again, you owe instead of getting a refund.

Filing Married Filing Separately and when it might help

You have the option to file as Married Filing Separately (MFS) instead of jointly. This means each spouse files their own return with their own income and deductions. The standard deduction for MFS is lower—$14,600 for 2024—and you lose access to many credits, including the Child Tax Credit and the Earned Income Tax Credit.

Filing separately almost never results in a larger refund or lower tax bill. The IRS designed the tax code to reward joint filing. However, in rare situations—such as when one spouse has significant unreimbursed medical expenses or casualty losses—filing separately might produce a better result. You would need to calculate both ways (jointly and separately) to know for certain.

If you file separately, both spouses must use the same tax year and file at the same time. You cannot file jointly one year and separately the next without IRS permission.

How to adjust your withholding after marriage

If you want to avoid owing money or getting a small refund after marriage, update your W-4 form with your employer. This form tells payroll how much tax to withhold from each paycheck. When you marry, your withholding should change to reflect your new filing status and combined household income.

You can file a new W-4 at any time. The IRS provides a withholding calculator on its website that walks you through the questions and tells you what to enter on the form. If both spouses work, you may need to coordinate—for example, one spouse might claim all the dependents on their W-4, and the other might claim zero, to avoid over-withholding.

Adjusting your withholding does not change your refund for the year you marry (that's determined by what was actually withheld). It affects future years. The goal is to have the right amount withheld so you break even or get a small refund, rather than a large one or a bill.

What happens to your refund if you marry late in the year

If you marry in December, you can file as Married Filing Jointly for that entire tax year, even though you were single for most of it. Your refund will be calculated using the MFJ standard deduction and tax brackets for the full year. This sometimes results in a larger refund than you'd expect, because the MFJ deduction applies to your combined income for the whole year, not just the months you were married.

Conversely, if you marry early in the year and both spouses have high incomes, you may owe more tax than you would have as single filers. Again, the key is to update your W-4 forms as soon as you marry so that withholding for the rest of the year reflects your new status.

Frequently Asked Questions

Will I automatically get a bigger refund if I get married?

Not necessarily. A bigger refund depends on your combined income, how much tax was withheld, and whether you have dependents or other deductions. Some married couples owe money instead. The higher standard deduction helps, but it does not may provide a larger refund.

What if my spouse and I have very different incomes?

Filing jointly often helps when incomes are unequal, because the lower-earning spouse's income may be taxed at a lower rate when combined with the higher-earning spouse's income. However, you should still calculate both ways (jointly and separately) to be sure, especially if one spouse has significant deductions or credits.

Do I have to file jointly after I marry?

No. You can file as Married Filing Separately if you choose. However, this usually results in a higher total tax bill and disqualifies you from many credits. Joint filing is almost always better, but you can calculate both ways to confirm.

When should I update my W-4 after getting married?

As soon as possible. Updating your W-4 ensures the right amount of tax is withheld from future paychecks. This does not change your refund for the year you marry, but it affects withholding for the rest of that year and beyond.

What if we got married in December—does that affect our refund?

Yes. You can file as Married Filing Jointly for the entire tax year, even if you married in December. Your refund is calculated using the MFJ standard deduction and brackets for all 12 months, which sometimes results in a larger refund than you'd get filing single.