Congratulations on your marriage! Now that the honeymoon is over, it’s time to tackle one of the first big financial to-dos of married life: filing taxes as newlyweds. Tax season can feel overwhelming when you’re still figuring out how to merge two lives together. But don’t worry — with a little preparation, you can avoid common mistakes, potentially save money, and start your marriage on solid financial footing. Let’s walk through everything you need to know.
Step One: Update Your Name and Address Before Tax Season
This is the step most couples forget — and it can cause real headaches. If you changed your name after getting married, the IRS requires that the name on your tax return exactly match the name on file with the Social Security Administration (SSA). A mismatch can delay your refund or even trigger a rejection.
Here’s what to do before you file:
- Update your name with the SSA first. File Form SS-5 with your local Social Security office. This is the foundation — every other agency follows from here.
- Notify the IRS of your new address. Use Form 8822 to make sure your refund and correspondence reach you.
- Update your employer’s HR records so your W-2 reflects your correct name and address.
Over 500,000 newlyweds have trusted MissNowMrs since 2007 to handle the name change process quickly and accurately. Our step-by-step service makes sure nothing falls through the cracks — because a missed form today can mean a tax headache in April.
Choose the Right Filing Status
Your marital status on December 31st determines your filing status for the entire tax year. Even if you got married on New Year’s Eve, you’re considered married for that full year in the eyes of the IRS.
As a married couple, you have two options:
Married Filing Jointly (MFJ)
Most newlyweds benefit from filing jointly. You combine your incomes and deductions on one return, and you typically qualify for:
- A higher standard deduction
- Better eligibility for tax credits like the Child Tax Credit and Earned Income Credit
- Lower overall tax brackets in many income combinations
Married Filing Separately (MFS)
Filing separately can make sense in specific situations — for example, if one spouse has significant medical expenses, student loan income-driven repayment plans, or complicated tax situations. However, filing separately usually means giving up several valuable credits and deductions. It’s worth running the numbers both ways or consulting a tax professional.
Understand the Marriage Tax Bonus (and Penalty)
Here’s something that surprises many newlyweds: marriage can either lower your tax bill or raise it depending on your income situation.
The Marriage Tax Bonus
If one spouse earns significantly more than the other — or if one spouse doesn’t work — you’ll likely enjoy a marriage tax bonus. Combining incomes can move you into a lower effective tax bracket than you’d each face filing separately. This is one of the biggest financial perks of getting married.
The Marriage Tax Penalty
If both spouses earn similar, higher incomes, you may face a marriage tax penalty. This happens because some tax brackets and deduction phase-outs for married couples aren’t exactly double the single thresholds. It doesn’t mean you’ll pay dramatically more, but it’s worth knowing so you’re not caught off guard.
The best move? Use the IRS Tax Withholding Estimator tool or talk to a CPA before filing your first joint return.
Double-Check Your Withholding Right Away
Getting married changes your tax situation immediately — but your employer doesn’t know that unless you tell them. One of the smartest things you can do as a newlywed is update your W-4 form with your employer as soon as possible after the wedding.
Here’s why it matters: if both spouses are working and each employer withholds as if that salary is the household’s only income, you could end up significantly under-withheld — meaning a surprise tax bill in April. Updated W-4s help you dial in accurate withholding for the year.
Steps to take now:
- Complete a new W-4 with your employer (use the IRS withholding calculator to determine the right amounts).
- Have your spouse do the same with their employer.
- Revisit your withholding mid-year if your income changes.
Tax Credits and Deductions Worth Knowing About
Filing jointly opens the door to credits and deductions you may not have had access to as a single filer. Keep an eye on these:
- Child and Dependent Care Credit — if you have children or plan to
- American Opportunity and Lifetime Learning Credits — if either spouse is in school
- Energy Efficiency Credits — if you bought a home together
- IRA Contribution Deductions — especially if one spouse isn’t working
These can add up to meaningful savings, so it pays to review them each year as your situation evolves.
Don’t Forget the Name Change Connection
Here’s a practical reminder from our team at MissNowMrs: the name change process and tax filing are more connected than most people realize. If you haven’t yet updated your name with the SSA, your employer, or your financial institutions, do it before tax season arrives. Our name change service walks you through every agency in the right order so your legal name is consistent everywhere — including on your tax return.
Frequently Asked Questions: Filing Taxes as Newlyweds
Do I have to file taxes jointly after getting married?
No, you are not required to file jointly. Married couples can choose between Married Filing Jointly and Married Filing Separately each year. However, most newlyweds benefit more from filing jointly due to higher standard deductions and access to more tax credits.
What if I changed my name but haven’t updated the Social Security Administration yet?
You should update your name with the SSA before filing your tax return. If the name on your return doesn’t match SSA records, the IRS may reject your return or delay your refund. MissNowMrs can help you complete this process quickly and correctly.
When should we update our W-4 forms after getting married?
You should update your W-4 as soon as possible after getting married, ideally within a few weeks of the wedding. Updating your withholding early in the year prevents under-withholding and surprises at tax time. Use the IRS Tax Withholding Estimator to find the right amounts.
What is the marriage tax penalty and will it affect us?
The marriage tax penalty occurs when two spouses with similar incomes pay more in taxes combined than they would as two single filers. It most often affects couples where both spouses earn moderate to high incomes. Running your numbers with a tax professional can help you understand your specific situation.
Can we file taxes jointly if we got married late in the year?
Yes! If you were legally married on December 31st of the tax year, you are considered married for the entire year by the IRS. That means you can file jointly even if you got married in December, and you’ll receive all the benefits of joint filing for that year.