2024 Additional Medicare Tax Limits 2024. Irmaa is a surcharge people with income above a certain amount must pay in addition to their medicare part b and part d premiums. The resulting maximum social security tax for 2024 is $10,453.20.

The resulting maximum social security tax for 2024 is $10,453.20. For example, someone filing an individual tax return whose income is between $103,000 and $129,000 will pay $244.60 a month for part b instead of the.