3 ways your relationship status could impact your tax bill

Taxes aren’t exactly romantic, but your relationship status can have a big effect on your taxes.

Whether you just got married, recently combined finances, or are navigating a more complex partnership, the IRS uses your status as of Dec. 31 to determine how you file for the entire year. That means one life change can ripple through your withholding, credits, and overall tax bill — sometimes in ways couples don’t see coming, for better or for worse.

So, whether you’ve been married for years or just tied the knot, here’s what you need to know — from how to file together for the first time to the tax advantages of being married and when filing separately might be smart.

As we said earlier, the IRS generally looks at your marital status as of Dec. 31, so if you were married by the end of 2025, you’re considered married for that entire tax year and will need to choose a filing status: either married filing jointly or married filing separately.

If you recently got married and you’re filing together for the first time, there are a few things to put on your radar right away.

Report a name and address change (if applicable)

First, the IRS says newlyweds should make sure any name change is reported to the Social Security Administration and that any address change is updated with the U.S. Postal Service, employers, and the IRS.

If your tax documents don’t match your legal name or current address, you’re setting yourself up for potential headaches down the road. The IRS offers four ways to update your address:

Fill out Form 8822

Use your new address when you file your tax return

Send a signed written statement with your full name, old and new addresses, and Social Security number to the address where you would file your return

Tell them in person or by phone. They’ll want to verify your identity, and you’ll have to have the following on hand: full name, old and new addresses, and Social Security number.

You should also take a fresh look at your tax withholding.

“Reviewing your withholdings as a married couple is critical so you don’t get slammed with a surprise tax bill after you get married,” said Phillip Hulme, CFP and chief financial advisor at Stars and Stripes Financial Advisors in Atlanta.

Hulme said this is often a big issue when couples earn significantly different amounts of income. “Employers don’t know what your new spouse earns, so they don’t know how much to withhold from your paycheck,” explained Hulme.

You can use the IRS Tax Withholding Estimator to calculate your withholding.

But automatically switching your W-4 withholding to “married filing jointly” doesn’t always make sense, though that option sounds intuitive because it matches how many couples ultimately file their taxes.

That disconnect can create problems in dual-income households, said Ryan Johnson, CFP and founder at Hundred Financial Planning. “This can actually result in you withholding too little in taxes. If you select ‘married filing jointly’ on your W-4, the system can assume this is the only income that your household will make.”

So if both partners are working, selecting “married filing jointly” can end up withholding half of what you needed to, said Johnson.

“It often makes sense to keep the tax withholding the same unless there’s been meaningful income changes at the same time as the marriage, like someone deciding not to work,” he added.

Read more: Withholding tax: What is it, and how can I check or change it?

Marriage doesn’t automatically lower your taxes, but it can unlock better tax treatment, especially if you file a joint return.

The most obvious benefit is a bigger standard deduction. For the 2025 tax year (for filing taxes in 2026), the standard deduction is $31,500 for married filing jointly, compared with just $15,750 for single filers and married people filing separately.

If you file jointly, you effectively get double the 2025 standard deduction. That alone can reduce taxable income substantially, especially for couples who don’t itemize.

There are also itemized deduction differences. For example, the 2025 cap on the deduction for state and local taxes is $40,000 for joint filers, compared with $20,000 for married couples filing separately. That won’t help every household, but for higher earners in high-tax states, it can make a noticeable difference.

Read more: Best tax deductions to claim this year

Better access to credits and phaseouts

This is where filing jointly often pulls ahead. Some tax breaks are either completely unavailable or much harder to claim if you file separately.

Filing separately generally bars couples from claiming the following tax breaks:

American opportunity tax credit

Lifetime learning credit

Student loan interest deduction

Earned income tax credit, unless you qualify for the narrow exception for certain separated spouses

Child and dependent care credit in most cases, unless you meet the IRS exception for certain spouses living apart

Adoption credit in most cases

Enhanced senior deduction under the One Big Beautiful Bill Act

Deduction for qualified tips (“no tax on tips”)

Deduction for qualified overtime (“no tax on overtime”)

Exclusion of interest from qualified U.S. savings bonds used for higher education

Joint filers also usually get more favorable income limits before certain benefits phase out.

That can matter for traditional IRA deductions and other tax perks that shrink as income rises.

For tax year 2025, if you’re covered by a workplace retirement plan, the deduction for traditional IRA contributions phases out at a modified adjusted gross income of $126,000 to $146,000 for those married filing jointly.

But for single filers, the phaseout is between $79,000 and $89,000, and for married filing separately, the tax perks of contributing to a traditional IRA disappear completely if your AGI is above just $10,000.

Read more: Free tax filing: How to file your 2025 return for free

Marriage can also create more planning opportunities over time.

“Getting married is a great opportunity to think about taxes more strategically over the long term,” said Jake Taylor, CFP and founder of Astra Wealth Management in San Diego.

Filing jointly may make it easier to coordinate retirement contributions and future estimated tax payments as a household, added Taylor. “As couples age, or if they’re getting married later in life, strategies such as Roth conversions, RMD planning, and timing the sale of investments — along with gifting and estate planning — can become very important,” he said.

That doesn’t mean filing jointly is always the best choice. But in many cases, it gives couples a wider range of tax-saving opportunities.

One marriage-related tax benefit people often overlook is the spousal IRA.

Despite the name, it’s not a joint retirement account. Each spouse still owns their own IRA. If you file a joint return, a spouse without taxable compensation can still contribute to an IRA, as long as the couple has enough earned income and meets the normal eligibility rules.

That can be especially helpful if one spouse stepped back from work or stayed home with children.

However, marriage can also create new restrictions. If your combined income gets too high, you may lose the ability to contribute directly to a Roth IRA.

“Sometimes people don’t realize that once they get married, their income disqualifies them from contributing the way they were before,” said Gabbi Cerezo, CFP at Sustain Financial in Los Angeles.

For tax year 2025, married filing jointly Roth eligibility phases out from $236,000 to $246,000. But for married filing separately, the rules are much harsher if you lived with your spouse during the year. In that case, the phaseout range is $0 to $10,000.

In other words, married filing separately can eliminate direct Roth IRA eligibility almost instantly.

Most financial experts recommend filing jointly if you’re married since doing so often leads to a lower tax bill. But there are times when married filing separately is the smarter move.

Filing separately may be worth considering if:

One spouse owes back taxes.

One spouse owes unpaid child support.

One spouse has certain debts that could trigger a refund offset.

One spouse qualifies for reduced student loan payments under an Income Driven Repayment (IDR) plan.

One spouse doesn’t trust the other’s reporting or tax behavior.

If you file a joint return, your refund could be used to pay certain debts that belong only to your spouse, such as back taxes, unpaid child support, or some other government-related debts. Filing separately may help protect the other spouse’s refund.

Another common scenario involves federal student loans, said Cerezo.

“Filing separately can make sense if one partner has large student loan debt and is in an IDR plan,” she explained. “By filing separately, they exclude their spouse’s income and can qualify for a lower IDR payment.”

There’s one more important tax rule to note: When filing separately, if one spouse itemizes deductions, the other spouse generally has to itemize, rather than taking the standard deduction.

Read more: There are 5 federal tax filing statuses. Which one is right for you?

There isn’t a universal right or wrong answer. You have to run the numbers and figure out what works best for your specific situation. The cleanest way to do that is to prepare the return both ways in tax software or have a tax professional compare the outcomes.

Don’t just look at the refund figure in isolation. Look at total tax liability, eligibility for credits, retirement account implications, and any downstream effect on student loan payments or debt offsets.

A smaller refund doesn’t always mean a worse overall result. A bigger refund isn’t always a good thing, and it could mean your withholding was off all year.

In general, most financial experts recommend filing together. The perks simply outweigh the downsides in most cases.

Learn more: Tax refunds are bigger this year. Why that’s not good news for taxpayers.

Often, couples going through a divorce still benefit financially from filing a joint return for the final year of marriage. However, cooperation can break down during divorce negotiations, and one spouse may prefer filing separately for legal or personal reasons. A tax professional can help determine which option makes the most financial sense.

No. If you were legally married as of Dec. 31, the IRS generally doesn’t let you file as single for that tax year. Instead, you’ll need to file as either married filing jointly or married filing separately. The main exception is if you qualify for head of household under special rules, which usually requires living apart for a significant part of the year and meeting other IRS requirements.