At a glance
Start with these three things.
What it is
An extra charge for some higher-income beneficiaries.
Who decides
Social Security makes the determination.
What comes next
A qualifying income change may warrant another look.
Your questions, unpacked
Understanding IRMAA: your questions, answered.
Why the amount can be different
Social Security uses tax information to determine whether higher-income beneficiaries pay an additional amount. The income thresholds and charges can change each year.
The adjustment is separate from choosing a particular insurance company or drug plan. Review the determination notice for the basis of your amount.
If your circumstances have changed
If your income has fallen because of a qualifying life-changing event, such as retirement or certain other changes, you may be able to ask Social Security for a new determination.
The notice explains your options. Social Security provides the relevant rules and forms; tax and financial questions may also call for qualified professional advice.
Keep the decision in context
Include any income-related adjustment when reviewing your coverage budget. A lower advertised plan premium does not necessarily remove it.
Bring the notice and your questions to the appropriate official agency. Avoid sharing tax documents or sensitive account details through a general website contact form.
The lookback and a new determination
Social Security generally uses income from your tax return two years earlier. For 2026, this usually means your 2024 return.
If a qualifying life-changing event reduced your income, Social Security’s SSA-44 process may allow you to request a new determination. Follow the instructions and deadlines in your notice.
Sources & further reading
Related guidance