Short answer: A higher-income Medicare surcharge can last for the calendar year it covers, but it may change in a later year when a different tax return is used. A successful correction or new initial determination can also create a retroactive adjustment for affected months.
Does IRMAA reset every year?
Social Security makes an IRMAA determination for an effective year using the tax information available for that year. Because a newer tax year is normally reviewed for a later premium year, your surcharge may increase, decrease, or disappear when your income changes.
This is why a one-time income spike does not necessarily mean you will pay the same surcharge forever. It can still affect the premium year tied to that tax return, even when the income does not repeat.
Education sponsor placement for Medicare premium, tax planning, and retirement income resources.
Sponsor this placementA simple IRMAA timeline
- Income year: you report income on a federal tax return.
- Lookback: Medicare generally uses tax information from two years earlier.
- Effective year: the resulting IRMAA amount generally applies for the months you are enrolled during that premium year.
- Next determination: a later premium year is determined again using newer available information.
For example, 2026 premiums generally use 2024 MAGI. A different tax year will normally be used when determining a later premium year.
Can you receive an IRMAA refund?
People often use the word "refund," while SSA rules describe a retroactive adjustment. If Social Security revises the determination for an affected year, it can adjust differences between what was paid and what should have been paid.
Situations that may support a correction or new initial determination include:
- SSA initially used tax information from three years earlier and the return from two years earlier later becomes available.
- You filed an amended tax return for the tax year used in the determination.
- You can prove the IRS income or filing-status information used by SSA was incorrect.
- A qualifying life-changing event significantly reduced household income and SSA accepts more recent income information.
Appeal, correction, or wait for the next year?
- Check for a correction: review the tax year, MAGI, and filing status shown on your notice.
- Check SSA-44 eligibility: use the life-changing-event route only when the requirements actually fit.
- Plan for the next determination: if the notice is accurate and no qualifying event applies, the surcharge may remain for the effective year and change when newer income is used.
Keep the next premium year from surprising you
Get the IRMAA planning checklist and practical annual threshold updates.
What to save
Keep your IRMAA notice, the tax return SSA used, any amended tax return, proof of corrected IRS information, and documents supporting a qualifying life-changing event. The IRMAA planning checklist can help organize the decision before you contact Social Security.