The standard Part B premium amount in 2021 is $148.50. Most people pay the standard Part B premium amount. If your modified adjusted gross income as reported on your IRS tax return from 2 years ago is above a certain amount, you'll pay the standard premium amount and an Income Related Monthly Adjustment Amount (IRMAA). IRMAA is an extra charge added to your premium.
The chart below shows your estimated prescription drug plan monthly premium based on your income as reported on your IRS tax return. If your income is above a certain limit, you'll pay an income-related monthly adjustment amount in addition to your plan premium.