How to add a spouse to health insurance after marriage

• 60 daysto use the marriage Special Enrollment Period on the ACA marketplace
• $86,560400 percent of poverty for a household of two, where 2027 marketplace subsidies stop
• 10.22%of household income, the 2027 line for when employer coverage counts as affordable, up from 9.96 percent

Your options after the wedding

On an employer plan, the Department of Labor says coverage for a new spouse starts no later than the first day of the month after the plan receives your request. Employers can offer longer windows than 30 days, but do not count on it. Ask HR the week you get back from the honeymoon.

The marketplace rule most couples miss

Marriage is a qualifying life event, but there is a catch. To use the marriage Special Enrollment Period, at least one of you must have had qualifying health coverage for at least one day in the 60 days before the wedding. There are exceptions if one of you lived outside the country during that time or is an American Indian or Alaska Native. If neither of you had coverage, you generally wait for open enrollment, which runs November 1, 2026 to January 15, 2027 on HealthCare.gov.

If one of you already has a marketplace plan, the rules usually let you add the new spouse to that plan or enroll the spouse separately, rather than using the marriage to shop for a completely different plan for the existing enrollee.

How marriage changes your subsidy

Marketplace tax credits are based on household income, and once you are married your household is both of you. You also need to file your taxes jointly. The IRS says married people who file separately cannot get the premium tax credit, with a narrow exception for victims of domestic abuse or spousal abandonment.

Because enhanced tax credits expired at the end of 2025, the 400 percent of poverty cutoff is back. For 2027 coverage that line is $63,840 for one person and $86,560 for a household of two. Here is how that plays out, as an illustration:

Illustration only, using the 2026 federal poverty guidelines that set 2027 marketplace eligibility. Your actual credit depends on your county's benchmark plan and ages.

Two things make getting this right more important than it used to be. Starting with 2026 coverage, there is no longer a cap on how much excess advance credit you repay at tax time, so an estimate that ignores your spouse's income can turn into a large tax bill. And if you marry mid year, IRS Form 8962 has an alternative calculation for the year of marriage that may let you repay less. Update your marketplace application as soon as you marry, and use my subsidy calculator to see where your combined income lands.

Employer plan or marketplace? The family glitch fix

If one of you has a job that offers coverage, that offer affects whether the other can get marketplace help. Before 2023, affordability for the whole family was judged only on the cost of employee only coverage. That left spouses stuck with expensive family premiums and no subsidy. IRS rules that took effect for 2023 fixed it: affordability for family members is now judged on what the employee would pay for family coverage.

For 2027, employer coverage counts as affordable if it costs no more than 10.22 percent of household income. Here is an illustration. A couple earns $80,000. Employee only coverage costs $150 a month, which is 2.25 percent of income, so the employee stays on the job plan. Adding the spouse would cost $900 a month, which is 13.5 percent of income. Because that is above 10.22 percent, the spouse may qualify for a subsidized marketplace plan while the employee keeps the employer plan.

Step by step

• Week one: get the cost of spouse or family coverage from each employer, since that 30 day clock is the shortest.
• Keep your marriage certificate handy. The marketplace can ask for documents to confirm a Special Enrollment Period.
• Report the marriage on your marketplace application with your new household size and combined income.
• Compare total cost, meaning premiums plus deductibles and out of pocket maximums. My guide to deductibles vs out of pocket maximums explains the math.
• Check both of your doctors against whatever plan you pick.

My honest take

For a lot of newlyweds, the best answer is simply joining the spouse's employer plan, and I will tell you that even though I earn nothing from it. The marketplace wins when you are self employed, when the job plan is expensive for a spouse, or when your combined income still qualifies for real help. If one of you runs a business, read my self employed guide too, because estimating a combined income with business earnings has its own traps.

Common questions