The projected base cost people usually mean is the standard Medicare Part B premium , and for 2026 it is about $206.50 per month.

What that covers

That is the monthly amount most beneficiaries pay for Part B in 2026 before any income-related surcharge is added. Some people pay more if they have higher income, because Medicare adds IRMAA surcharges on top of the standard premium.

Other Medicare costs

Medicare also has other costs besides Part B, including Part A deductibles and coinsurance, and Part D drug plan premiums and cost-sharing. So if you meant the total monthly Medicare bill, the answer depends on which parts of Medicare you have and whether IRMAA applies.

In one line

For a quick estimate, use $206.50/month for Medicare Part B in 2026 as the base premium.