Retiring Can Reset a Medicare Surcharge Tied to Old Income, Potentially Cutting Thousands Off Your Bill

Medicare can add an income-based surcharge tied to earnings you no longer receive, and many new retirees do not realize a federal rule may help erase thousands of dollars in extra yearly premiums.

If you are enrolled in Medicare Part B and were still earning a salary two years ago, your premium may be based on income from that earlier period. Social Security determines the Medicare income surcharge, known as IRMAA, using tax information from two years prior.

So if you retire in June, you may still be billed based on the salary you earned two years earlier. For a single filer whose modified adjusted gross income was above $205,000 and below $500,000, the extra Part B charge is $446.30 a month, or $5,355.60 over a year. You can file Form SSA-44 and ask Social Security to use your lower income after retirement instead.

Retirement Can Change Your Medicare Premium

By default, Social Security looks at modified adjusted gross income from the tax year two years earlier. But the agency can use a more recent year if you report a major life-changing event that reduced your income, and retirement qualifies.

If your updated estimate places you in a lower bracket, the surcharge decreases. If your income falls to $109,000 or less for a single filer, or $218,000 or less for a joint return, the surcharge disappears and you pay the standard monthly Part B premium of $202.90.

The Federal Rules Behind the Charge

The surcharge comes from Section 1839(i) of the Social Security Act, codified at 42 U.S.C. 1395r(i). Social Security’s regulation at 20 CFR 418.1135(a) establishes the two-year lookback period. Section 418.1135(e) allows the agency to use a more recent tax year. The qualifying events appear in 20 CFR 418.1205 and include: “You or your spouse stop working or reduce the hours you work.” Under 20 CFR 418.1215, the drop in income must be large enough to move you into a lower bracket or eliminate the income-related monthly adjustment amount.

Who Qualifies and Who Does Not

Section 418.1205 lists seven qualifying events: a spouse’s death, marriage, divorce or annulment, stopping work or cutting back hours, loss of income-producing property through disaster, fraud or theft, a scheduled end or reorganization of an employer pension, and an employer settlement tied to a closure or bankruptcy. A spouse’s retirement also counts.

Section 418.1210 excludes other events, including those that affect expenses but not income, as well as lost dividends from ordinary investment risk. A one-time income spike from selling a home, converting to a Roth IRA, or taking a large IRA withdrawal is not on the list, so a surcharge triggered by one of those events usually remains in place.

How to Seek the Standard Premium

1. Locate your IRMAA notice from Social Security. Check which tax year was used and which bracket you were assigned.
2. Estimate your Medicare-adjusted gross income for the year after retirement. Include wages through your last day of work, severance or unused vacation pay, pension income, IRA withdrawals, and taxable investment income. Compare that amount with the current thresholds of $109,000 for single filers and $218,000 for joint filers.
3. Complete Form SSA-44. You can submit it online through your Social Security account, fax or mail it to a local office, or call 1-800-772-1213. Select work stoppage as the event and provide your retirement date.
4. Attach proof of the change, such as employer paperwork showing your final day, along with support for your income estimate.
5. Review the next notice when it arrives. The default for the following year is usually the tax return from two years earlier, which may still reflect a full year of salary. If the surcharge remains, file again using the newer estimate.

Social Security Verifies the Numbers

Social Security ultimately receives your actual income information from the IRS. Under 20 CFR 418.1140(d), if the final number differs from your estimate, the agency can make retroactive adjustments for all months of the year. Leaving out severance pay or a year-end bonus could lead to a later bill.

A half-year of wages may not always be enough to bring the premium all the way back down. If your earnings from the first half of the year still place you above the threshold, filing the form may lower the bracket without restoring the standard premium. For example, a single filer with income above $109,000 and up to $137,000 still pays an extra $81.20 a month for Part B. Part D prescription coverage has its own surcharge as well, and in the over-$205,000 single bracket it is $83.30 a month.

The same request can reduce the extra charge for both Part B and Part D. Other income-linked premium traps from two years earlier exist beyond IRMAA, and the rest are covered in a free Medicare guide.