You pay a premium each month for Part B. If you get Social Security, Railroad Retirement Board, or Office of Personnel Management benefits, your Part B premium will be automatically deducted from your benefit payment. If you don’t get these benefit payments, you’ll get a bill.
Most people will pay the standard premium amount. If your modified adjusted gross income is above a certain amount, you may pay an Income Related Monthly Adjustment Amount (IRMAA). Medicare uses the modified adjusted gross income reported on your IRS tax return from 2 years ago (the most recent tax return information provided to Social Security by the IRS).
The standard Part B premium amount in 2017 is $134 (or higher depending on your income).