Medicare Part B Jumps to $454/Month at $111K Income for Singles

2026 income-related monthly adjustment amounts (IRMAA) can triple your Medicare premium based on 2024 tax returns

The Details

A single dollar over an IRMAA threshold costs you $888 more per year. Converting $1,000 from an IRA to Roth could trigger a $133K income, jumping your premium from $259 to $370 monthly for the entire following year.

What this means for you

Retirement decisions compound — getting one of these details wrong can cost tens of thousands of dollars over a retirement. The good news: most of these mistakes are completely avoidable if you understand how the rule actually works.

Next step

If you want to see how this applies to your specific situation, take the free Retire Ready Score — a 2-minute assessment that scores your current plan across income, taxes, healthcare, and protection.