Don't Mess Up Your HSA! Key Timing Tips for Social Security & Medicare

Key Takeaways

• Stop HSA contributions once you enroll in any form of Medicare (Parts A, B, or both), as Medicare is considered non-qualifying coverage that prohibits HSA contributions
• Medicare begins retroactively 6 months before your Social Security application date, not when you actually start receiving benefits—so if you apply for Social Security at age 70, you cannot have contributed to your HSA starting 6 months before that application
• If you contribute during a period when you were already covered by Medicare retroactively, you owe a 6% penalty only on the excess amount contributed, which is relatively minor if caught and corrected timely
• Employees at larger employers may continue HSA contributions after 65 by declining Medicare enrollment and staying on employer coverage, while those at smaller employers often must enroll in Medicare after 65 when it becomes primary
• Consult a professional advisor before applying for Social Security and Medicare to confirm the optimal timing for your specific situation, as the rules vary significantly based on employment status and enrollment choices