Irmaa Brackets 2025 Married Filing Separately. The social security administration determines your irmaa tier and premium part b and d surcharges based on your taxable income. In 2025, with the inflation.

I’ve created a simple irmaa calculator/estimator for the married filing jointly first threshold (google sheets). For beneficiaries of particular income brackets, filing your taxes jointly can save you bundles on your medicare premiums when compared to filing married but separate.