A 70-year-old in Ohio posts on a retirement forum: he scratched a lottery ticket at a gas station on the way home, won $25,000, paid federal withholding on the spot, and figured that was the end of it. Two years later, a letter from the Social Security Administration tells him his Medicare Part B premium is going up by roughly a thousand dollars for the year. He never earned a paycheck that year. Medicare treated the ticket like one anyway.
This is the mechanic every retiree with a one-time income spike needs to understand: a windfall you receive today can raise your Medicare premiums for a single year, two years from now, and then quietly fall off. If your income sits comfortably below the first IRMAA threshold and stays there, this article is not aimed at you. Only about 8% of people with Medicare Part B pay any income-related surcharge at all. But if your baseline income already puts you within striking distance of that first cliff, a scratch ticket, a Roth conversion, or a good year at the casino can push you over it.
How a Lottery Win Becomes “Salary” for Medicare
IRMAA (the Income-Related Monthly Adjustment Amount) is a surcharge added on top of your standard Part B and Part D premiums when your modified adjusted gross income clears certain thresholds. MAGI here means AGI (Form 1040, line 11) plus tax-exempt interest (line 2a). Gambling winnings, including lottery and scratch-ticket prizes, land in AGI as “other income.” Municipal bond interest that felt tax-free gets added back too. Social Security is largely a wash at this income level, since most of it is already taxable for higher earners.
Now the scenario. Our 70-year-old already had a pension of about $40,000, an RMD around $30,000, and taxable Social Security bringing his baseline MAGI near $95,000. Comfortably under the first tier. Then the ticket hits for $25,000. His MAGI for the year lands near $120,000, straight into the first IRMAA bracket for individual filers: above $109,000 and up to $137,000. Combined with the income already on his return, the winnings pushed him over.
The Two-Year Lookback and the Exact Damage
SSA uses a two-year lookback. Income reported on his 2026 tax return sets his 2028 Medicare premiums. In 2028, his Part B premium jumps from the standard $202.90 per month to $284.10, a Part B surcharge of $81.20 per month. His Part D plan tacks on another $14.50 per month, paid directly to Medicare. Across the year, that is roughly $1,150 in extra premiums he would not otherwise owe. For a deeper walkthrough of these surcharges and other overlooked retiree costs, see our Retirement Insider report on Medicare’s Hidden Bills.
Assuming his baseline income falls back below $109,000 in 2027, his 2029 premiums return to the standard rate. The surcharge lasts one year. But it lands as a lump on a fixed income. For context, the 2026 Social Security COLA of 2.8% on a typical benefit does not cover the hit.
Why SSA-44 Will Not Save Him
Readers routinely ask whether they can appeal. SSA-44 is the IRMAA reconsideration form, and it works only for a specific list of life-changing events: marriage, divorce, death of a spouse, work stoppage or reduction, loss of income-producing property, loss of pension income, or an employer settlement payment. A lottery win, a Roth conversion, capital gains on a home sale, an inherited IRA distribution: none of these qualify. The form is designed to reverse income drops caused by life changes such as job loss, retirement, or the death of a spouse.
One nuance worth flagging: if a spouse in a similar situation dies before the lookback year clears, the survivor files single the next year, and the single brackets are roughly half the joint ones. The same household income can newly trigger IRMAA or bump a tier without a dollar changing.
What to Do
- Before cashing a large ticket, selling appreciated property, or executing a Roth conversion in a year you are already close to $109,000 in MAGI, model the two-year IRMAA cost against the after-tax benefit. Sometimes splitting the event across two calendar years keeps you under the cliff both times.
- When the IRMAA determination letter arrives, check the tax year it references. If SSA used a year newer than what is on file, request an update using more recent tax returns.
- Budget for the surcharge as a one-year expense. It attaches to Part B and Part D premiums for twelve months, then drops off if your income returns to baseline.
Contact [email protected] for any questions or corrections.
Top Gaining Stocks
Top Losing Stocks