Your refund can shrink when you marry, but not because of the marriage itself—it's because your tax bracket and withholding change

When you get married, the IRS treats you differently starting the year of your marriage. If you were filing as single and claiming one withholding allowance, your employer will now withhold taxes based on married status, which is usually lower. That lower withholding means less money comes out of your paychecks—which sounds good until tax time, when you owe more and your refund shrinks or disappears entirely. The refund you're used to getting as a single person often goes away in the first year of marriage, even if your combined household income stays the same.

The size of the change depends on your spouse's income, whether they work, and how you both set your withholding. A couple where one spouse earns significantly more than the other may see almost no change. A couple with similar incomes often sees the biggest drop in refunds, because married filing jointly puts you in a different tax bracket than two single filers combined.

Key Takeaways

  • Married filing jointly usually results in lower tax withholding per paycheck than single filing, which reduces your refund the following year.
  • You can control the size of your refund by adjusting your W-4 form with your employer after you marry, claiming fewer or more allowances.
  • The refund change is not automatic or permanent—it depends entirely on how much tax your employer withholds from your pay.
  • If you marry late in the year, you may still file as single for that tax year, which delays the withholding change until the next year.

Why married filing jointly changes your withholding

The IRS tax tables for married filing jointly are structured differently than the tables for single filers. A married couple does not pay exactly double what a single person with the same income would pay. In many cases, married filing jointly results in a lower total tax bill than two single people filing separately with the same combined income—this is sometimes called the "marriage bonus." But that bonus only shows up if your employer withholds the right amount.

When you change your marital status with your employer, they use new withholding tables. The married tables assume you have a spouse's income to account for, so they withhold less per paycheck. If your spouse does not work, or works part-time, your household may actually owe less tax overall—but your employer does not know that. They withhold based on the assumption that both spouses earn income. The result is that you take home more each month but owe more at tax time.

How to control your refund after marriage

You do not have to accept whatever refund results from the default withholding. Within a few days of your marriage, you should submit a new W-4 form to your employer's payroll department. The W-4 is where you tell your employer how much tax to withhold. You can claim allowances, request an extra amount withheld, or specify a flat dollar amount to come out of each check.

If you want to keep your refund roughly the same size as before, you can claim fewer allowances on the married W-4 than the default. If you want to break even at tax time instead of getting a refund, you can adjust your allowances upward. The IRS provides a W-4 calculator on irs.gov that walks you through the math based on your household income, number of jobs, and filing status. It takes about ten minutes and gives you a specific number to enter on the form.

Do not wait until next April to deal with this. The sooner you adjust your W-4 after marriage, the sooner the new withholding takes effect, and the more accurate your refund will be when you file.

When the refund change happens

The refund change takes effect in the tax year you marry, not the following year. If you marry on June 15, 2024, you file your 2024 tax return in 2025 as married filing jointly (or married filing separately, if you choose). Your employer will withhold using married tables starting the pay period after you submit your new W-4—usually within one or two weeks of your marriage.

If you marry very late in the year—say, December—you may still file as single for that tax year if you have not yet submitted a new W-4. You can file as single for 2024 even if you married on December 20, 2024. That delays the withholding change until 2025. Some couples choose this route to avoid the refund shock in the first year of marriage, though it requires coordinating with your employer and understanding the filing deadline.

The difference between refund and take-home pay

A smaller refund does not mean you are worse off financially. In fact, the opposite is usually true. If your refund shrinks from $3,000 to $500, that means an extra $2,500 stayed in your paychecks throughout the year instead of being loaned to the IRS interest-free. You had access to that money when you needed it, rather than waiting until April to get it back.

The goal of withholding is to break even—to owe nothing and receive nothing. A refund means you overwitheld; a balance due means you underwitheld. Neither is inherently good or bad, but many people prefer a small refund to owing money at tax time. If that is your preference, you can adjust your W-4 to aim for a refund of a few hundred dollars rather than thousands.

What happens if both spouses work

When both spouses earn income, the withholding math becomes more complex. Each employer withholds based on the assumption that the other spouse earns nothing. This often results in underwithholding—not enough tax comes out of your combined paychecks, and you owe money in April instead of getting a refund.

The IRS W-4 form has a section for this situation. If you and your spouse both work, you can claim a portion of your allowances on one W-4 and the rest on the other, or you can request extra withholding on one or both forms. The W-4 calculator accounts for this and will tell you the right numbers to use. Without adjustment, couples where both spouses work often face an unwelcome surprise at tax time—a bill instead of a refund.

Frequently Asked Questions

Can I file as single the year I get married?

Only if you marry on December 31 of that tax year. For any other date, the IRS requires you to file as married filing jointly or married filing separately for that tax year. If you marry in December and want to file as single, you would need to marry on the very last day of the year.

Will my refund come back to normal next year?

Not automatically. Your refund depends on how much your employer withholds, which is set by your W-4. If you do not adjust your W-4 after marriage, your withholding stays at the married rate and your refund will remain smaller. You control this by updating your W-4 whenever your situation changes.

What if my spouse does not work?

Your refund will likely shrink less than it would if both of you worked. Your employer withholds based on married filing jointly, but since only one spouse earns income, you may actually owe less tax overall. Use the W-4 calculator to find the right withholding for your situation.

Do I have to file jointly after I marry?

No. You can file married filing separately if you prefer, though this usually results in a higher total tax bill. Married filing jointly is almost always more favorable. You can also file as single for the year you marry if you marry late in the year and have not yet changed your W-4.

When should I update my W-4?

Within a few days of your marriage, before your next paycheck. The sooner you submit the new form, the sooner your withholding adjusts. If you wait until January, you will have already gone through the end of the year with incorrect withholding, which affects your refund for that tax year.