She Will Marry at 70 and They Will File Jointly. His Pension Will Put Her Over the Medicare Line. The Surcharge Is Per Person, So It Will Hit Him Too

She is 70 and has filed single for years. Her Part B bill has always been the standard premium, which is $202.90 a month in 2026. He is a retired engineer with a steady pension. They plan to marry, merge households and file one joint tax return. Neither of them brings up Medicare.

They should. Medicare’s Income-Related Monthly Adjustment Amount (IRMAA) adds surcharges to Part B and Part D based on the income on your tax return. Once this couple files jointly, Medicare reads his pension and her income as one number. Then it bills each of them separately.

Most retirees never pay this surcharge. The Centers for Medicare & Medicaid Services (CMS) says it affects about 8% of people with Part B. If your combined income is well below the joint threshold, a wedding leaves your premiums alone. The couples who drift toward the line usually both bring a pension, IRA withdrawals or a taxable brokerage account into the marriage.

Joint Filing Combines the Income Before Medicare Prices Each Person

For 2026, married couples filing jointly owe no surcharge if their joint modified adjusted gross income (MAGI) is $218,000 or less. At that level, each spouse pays the standard premium. Go one dollar over and both spouses move into the first surcharge tier. The threshold works as a cliff, with no phase-in.

Your MAGI for IRMAA purposes is adjusted gross income plus any tax-exempt interest reported on Form 1040, line 2a. So his pension counts. So does every traditional IRA withdrawal, including required minimum distributions (RMDs), plus the taxable share of Social Security and any capital gains from selling stock or a second home. The interest from municipal bonds counts too. It escapes federal income tax, but Medicare adds it back, and that catches many retirees off guard.

Social Security just added another push. The 3.6% cost-of-living adjustment (COLA) for 2027 raises benefits. A bigger benefit can raise the taxable portion, so MAGI goes up even if the couple changes nothing.

Each Spouse Pays a Separate Surcharge

This is the part that costs them most. IRMAA applies to each person enrolled in Medicare. When both spouses have Part B, each pays the Part B surcharge set by their joint income. If both have drug coverage through a standalone Part D plan or a Medicare Advantage plan that includes drug coverage, each can also owe a Part D surcharge.

That means his pension can raise her premium, and her IRA withdrawals can raise his. A couple that crosses the line pays the surcharge on two Part B bills and two drug-plan bills, every month, for the whole year. IRMAA belongs to a group of Medicare traps that quietly add thousands a year in retirement, and we covered the rest in a free guide to Medicare’s hidden bills.

Whether Marriage Helps Depends on Both Incomes

Before the wedding, Medicare measures her against the single-filer schedule. The joint threshold is higher, so on paper marriage should give her more room. The catch is that the joint threshold has to cover two full retirement incomes. If his pension already puts him near the joint line, her Social Security and distributions push the total over it. If her income is modest and his is moderate, the couple can stay under the line, and she may pay less than she would filing single.

Filing separately looks like an escape hatch, but it usually costs more. CMS uses a much harsher schedule for married people who lived with their spouse at any time during the year but file separate returns. Under that schedule, the surcharge starts at a lower income and jumps almost straight to the top tiers.

Model the First Joint Return Before Year-End

Medicare sets premiums from the tax return filed two years earlier. Right after the wedding, each spouse is still billed on an old single return. Their first joint return shows up in their premiums two years later, long after anyone connects the higher bill to the marriage. By then that tax year is closed, and the income decisions that created the surcharge are largely behind them.

• Add up both incomes before December 31. Total his pension, both Social Security benefits, any required withdrawals, dividends, interest and municipal bond income. Then compare the total with $218,000.
• Time the big, optional moves. If the total lands near the line, push a Roth conversion, a home sale or a large IRA withdrawal into a different year, or split it across several years. One large transaction in the first joint year can trigger two surcharges.
• Know the limits of Form SSA-44. Marriage is on the Social Security Administration’s list of qualifying events, but the form only reduces a surcharge when the event cut your income. A wedding that raises combined income gives no grounds for appeal, and neither does converting to a Roth or selling a home.

Run the Numbers Before the Wedding

Marriage changes the tax return once. Medicare then charges the combined income twice, with one surcharge for each spouse. The rule also works in reverse later on. If one spouse dies, the survivor goes back to the single schedule while household income may barely change, so the same pension can trigger a surcharge again. The best time to plan is before the first joint return, while the couple still controls when IRA withdrawals and asset sales happen. If you’re about to marry and both of you have retirement income, find out what one joint tax return could do to two Medicare bills.

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