Tax moves for married couples

By Tom, CPA · Updated October 27, 2026

Part of: Easy Tax Strategies

TL;DR: Couples can fund a spousal IRA for a non-working spouse ($7,500 for 2026), coordinate HSAs and dependent care benefits so they do not double up or miss out, run the joint versus separate math, keep beneficiaries current, and use the unlimited marital deduction and gift-splitting.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Marriage merges two sets of tax paperwork, two benefits portals and at least one argument about whether the shoebox counts as a filing system. It also unlocks a handful of tax moves single people can't make. Most of them take an evening and a shared spreadsheet, not a strategy retreat.

Here is the checklist, with 2026 federal figures from the IRS as of October 2026 (2027 retirement limits had not been released yet). For the solo version, see 15-minute tax moves, and for the full menu, easy tax strategies.

CPA Warning Label: A beneficiary form beats a will for retirement accounts; an outdated one can send an IRA to an ex-spouse no matter what your will says.

Spousal IRA

• The rule: if you file jointly, a spouse with little or no earned income can contribute to an IRA based on the working spouse's compensation (Publication 590-A). For 2026 that is up to $7,500 each, plus $1,100 each if 50 or older.
• The limit: combined contributions can't exceed the couple's taxable compensation.
• Traditional or Roth: for a traditional IRA, the deduction for a non-covered spouse phases out between $242,000 and $252,000 of joint MAGI if the other spouse is covered by a workplace plan. Roth contributions phase out over the same $242,000 to $252,000 range.
• Deadline: the tax filing deadline, usually April 15 of the following year.

Illustration: Sam earns $90,000; Alex is home with a toddler. Filing jointly in 2026, they can put $7,500 into each of two IRAs, $15,000 total. If both are traditional and deductible in the 12% bracket, federal tax drops by $1,800. As Roth IRAs, there is no deduction now, but $15,000 a year growing tax-free for decades.

Benefit elections

Open enrollment is where couples quietly lose money by both picking "same as last year."

• Health plans and HSAs: family HSA limit for 2026 is $8,750 (2027: $9,000), shared between spouses with family coverage. Two family HSAs don't double it. A spouse on a non-HDHP family plan or a general-purpose FSA can knock the other out of HSA eligibility.
• Dependent care FSA: $7,500 per household for 2026, not per spouse ($3,750 if married filing separately). Coordinate so you don't over-contribute.
• 401(k) matches: make sure both spouses capture their full match before either goes beyond it.
• Which plan is cheaper? Compare premiums, deductibles and HSA eligibility side by side. Sometimes each spouse on their own employer plan beats one family plan.

Filing status check

Married couples choose between married filing jointly (MFJ) and married filing separately (MFS) (Publication 501). Joint is usually cheaper. Separate costs you a lot:

• Roth IRA eligibility phases out between $0 and $10,000 of MAGI if you lived together.
• The earned income credit and education credits are generally unavailable, and the dependent care credit is mostly blocked.
• The new senior deduction ($6,000 per person 65+) and the tips and overtime deductions require a joint return.
• If one spouse itemizes, the other must itemize too.

MFS can still make sense when one spouse has large medical bills (the 7.5% of AGI floor is easier to clear on a smaller AGI), when income-driven student loan payments are based on AGI, or when you don't trust the other return. Run both versions in software before deciding.

Withholding for two earners

Two paychecks are where joint returns go to surprise people. Each employer withholds as if that job were the household's only income, so each one applies the full standard deduction and the lowest brackets. Combined, too little gets withheld, and April arrives with a bill.

• The fix: on each spouse's Form W-4, use Step 2 (the multiple jobs checkbox, or the worksheet), or run the IRS Tax Withholding Estimator once for the household and put any extra withholding on the higher-paid spouse's W-4.
• When to redo it: marriage, a new job, a raise, a baby, or one spouse leaving work.
• Safe harbor: paying in at least 100% of last year's tax (110% if last year's AGI was over $150,000) avoids the underpayment penalty even if you still owe in April.

The annual money date

Once a year, ideally in November before open enrollment closes, sit down together with this page: confirm benefit elections, check IRA and HSA contributions, compare filing status, pull up beneficiary forms, and plan any gifts. Snacks are deductible from the evening's misery, if not from your taxes.

Beneficiaries

• Check every account: 401(k), IRA, HSA, life insurance, transfer-on-death brokerage. Beneficiary forms override wills.
• Spousal rollover: a surviving spouse can treat an inherited IRA as their own, which delays required distributions. Non-spouse beneficiaries usually face a 10-year payout (Publication 590-B).
• 401(k) spousal rights: many plans require the spouse to be the beneficiary unless the spouse signs a notarized waiver.
• HSA: a spouse beneficiary inherits it as their own HSA; anyone else gets it as taxable income.
• Step-up: jointly owned property generally gets a basis step-up on the half owned by the spouse who dies. In community property states, both halves can step up (Publication 551).

The widow's tax trap: in the year after a spouse's death the survivor often files single, with narrower brackets. Plan Roth conversions with that in mind.

Gifting

• Unlimited marital deduction: gifts between spouses who are US citizens are not subject to gift tax. For a non-citizen spouse, the 2026 annual exclusion is $194,000.
• Gift-splitting: a couple can give $19,000 each, $38,000 total, to any person in 2026 without using lifetime exemption. Splitting a gift from one spouse's account requires filing Form 709.
• 529 superfunding: a couple can front-load five years of annual exclusions into a 529, $190,000 per beneficiary at 2026 amounts, by electing on Form 709.
• Lifetime exemption: $15,000,000 per person for 2026 under the 2025 law, and portability lets a surviving spouse use the unused amount if the estate files a timely Form 706.