Medicare at 65 While Working: Why Your HSA Contributions Must Stop
Watch on YouTube The moment you enroll in any part of Medicare, IRS rules under IRC Section 223 prohibit further HSA contributions - and Medicare Part A can be retroactively backdated up to 6 months when you file for Social Security. This video explains the Medicare and HSA prohibition, the retroactive Part A trap, the delay strategy to preserve HSA access, spouse HSA contribution rules, how to pro-rate your final year of contributions, and how to correct excess contributions before the 6% excise tax under IRC Section 4973 compounds. HSA 2026 limits: $4,300 self-only, $8,550 family, plus $1,000 catch-up. See the next video in our playlist for Medicare IRMAA surcharges.
▶ Watch next: Medicare IRMAA: The 2-Year Lookback That Raises Your Premium - Social Security https://www.youtube.com/watch?v=-HpiA3a52wU
📺 Full playlist: Social Security (US - 2026) https://www.youtube.com/playlist?list=PLlIAFxS296491LWfYsLp6anRyo6_DO_pI
Chapters
- 0:00 The IRS Rule: Why Medicare and HSA Cannot Coexist
- 2:14 The Part A Trap: Retroactive Enrollment and the SS Connection
- 3:53 The Delay Strategy: Postponing Medicare to Preserve HSA Access
- 5:49 Spouse HSA Rules: When Only One Spouse is on Medicare
- 7:31 Pro-Rating: Your Last Partial Year of HSA Contributions
- 9:38 Excise Tax, Corrective Withdrawals, and the Final-Year Strategy
- 12:03 Quiz Time
The moment you enroll in any part of Medicare, you can no longer contribute to an HSA — and Part A enrollment is automatic if you claim Social Security at or after 65. This trips up high earners who wanted to delay Medicare to keep contributing. The SSA/HSA interaction requires deliberate timing.
Key Topics
- The Medicare + HSA prohibition (IRS rule, not Medicare rule)
- Why Part A enrollment is retroactive (up to 6 months)
- The "delay SS past 65 to delay Part A" strategy
- Spouse HSA contributions if only one spouse is on Medicare
- Pro-rating HSA contributions in the enrollment year
- Excise tax on excess HSA contributions if Medicare enrollment was missed
- Planning the exit: final year HSA strategy before 65