A clear overview of the 2026 Medicare Part A, B, and D premium increases and IRMAA thresholds, with charts that show the key income levels that affect premiums and year end tax planning decisions for taxpayers.

IRS Notice 2025-67 raises 2026 contribution limits for 401k plans, 403b plans, governmental 457 plans, SIMPLE and SEP IRAs, traditional IRAs, and Roth IRAs. Includes updated catch-ups for ages fifty and sixty through sixty three, new income phase outs, and expanded saver credit limits. Learn how these changes affect tax planning for 2026.