Year-End Tax Planning for Couples: Filing Jointly vs. Separately Revisited
As the end of the tax year approaches, couples have an important decision to make: Should we file jointly or separately? While the default for most married couples is to file a joint return, there are circumstances where filing separately might be the smarter option.
Revisiting this decision before December 31 gives you time to gather documentation, run comparisons, and make a choice that could significantly impact your tax liability or refund. Here’s what couples need to know as part of their year-end tax planning.
The Standard: Filing Jointly
Most married couples choose to file jointly—and for good reason. Filing a joint return often results in:
Lower overall tax rates
A higher standard deduction (for 2025, it’s $27,700 for joint filers)
Eligibility for more tax credits, including the Earned Income Tax Credit (EITC), Child Tax Credit, and education-related credits
A simplified process, with just one return to file
If both spouses are earning and have relatively straightforward tax situations, filing jointly usually leads to a larger refund or smaller tax bill.
When Filing Separately Might Make Sense
While filing jointly is often beneficial, there are scenarios where married filing separately could be the better choice:
One spouse has significant medical expenses: Medical deductions are based on a percentage of your adjusted gross income (AGI). Filing separately can sometimes make those expenses deductible when they wouldn’t be on a joint return.
You want to protect your refund from a spouse’s debt: If your spouse owes back taxes, child support, or student loans in default, their debt could reduce your joint refund. Filing separately can prevent your portion from being seized.
You’re separating or going through a divorce: If your marital status or financial relationship is uncertain, filing separately may be a safer or more practical option.
You have income-based student loan payments: If one spouse is on an income-driven repayment plan for student loans, filing separately can reduce their reported income and lower monthly payments.
That said, filing separately usually comes at a cost: you may lose access to key tax credits and deductions, and your combined tax bill could end up being higher.
Year-End Action Steps for Couples
If you’re unsure which filing status is best for you, now is the time to run the numbers—before the year ends and your options are locked in. Here are a few steps to help:
Estimate both scenarios: Use a tool like the Tax Refund Calculator to simulate both joint and separate filings and see which provides the better outcome.
Check your eligibility for credits: Some credits—like the Earned Income Tax Credit and the American Opportunity Credit—are not available when filing separately. Factor this into your decision.
Review your deductions: Compare the standard deduction for joint filers against potential itemised deductions when filing separately, particularly for medical, state/local taxes, or mortgage interest.
Consult a tax professional: If your situation is complex—such as managing rental income, self-employment, or large capital gains—a tax advisor can help clarify which filing status benefits you most.
Update Your Withholding Before Year-End
If you discover that your chosen filing status might lead to a tax bill—or if you’ve recently changed income levels—it’s not too late to adjust your tax withholding. Submitting an updated W-4 to your employer can help offset any shortfalls before the year ends.
Plan Ahead for a Smoother Tax Season
Deciding how to file isn’t just about this year—it can affect how you plan your finances moving forward. Review your income sources, deductions, and shared expenses together as a couple so you’re both prepared for the filing process.
If you anticipate any major life changes in the coming year—like a new job, a baby, or buying a home—consider how they may impact your future tax situation and refund potential.
Revisit, Recalculate, and Refile if Necessary
If you file jointly and later discover it would’ve been better to file separately (or vice versa), you can file an amended return within three years. But ideally, you’ll make the right choice the first time by planning ahead now.
Final Thought:
Filing jointly or separately may seem like a simple checkbox, but the choice can have a major effect on your tax outcome. As you wrap up the year, take time to revisit your filing strategy and ensure you’re making the best decision for your finances—and your relationship. A few calculations today could mean a bigger refund tomorrow.