Medicare Part B costs in 2025: the standard monthly premium is $185.00, with an annual deductible of $257. Some beneficiaries pay higher amounts based on modified adjusted gross income (IRMAA), and the exact premium can vary depending on income thresholds. If you rely on Social Security or your specific income, your bill may differ from the standard amount. For those with income-related adjustments, the monthly premium can range from about $259 to $628.90, depending on income and household filing status. The standard premium and deductible amounts are set by CMS each year and are published publicly. If you’d like, I can help you estimate your specific Part B cost for 2025 based on your income and household filing status, or point you to the official sources that list the income-related monthly adjustment amounts.