HSA and Medicare Checklist
Coordinate Medicare effective dates with HSA contribution rules before enrollment.
Check the Medicare start date
Medicare eligibility and actual enrollment are different. After Medicare coverage starts, further HSA contributions can create tax problems. Part A can be retroactive when a person enrolls after age 65, often up to six months but no earlier than eligibility.
Official source: Medicare: Working past 65 ↗ · Medicare: When coverage starts ↗
Stop contributions before filing
Medicare advises people with an HSA to stop contributions about six months before they retire or apply for Social Security or Railroad Retirement Board benefits. Coordinate employee and employer deposits and the actual application date with a tax adviser or plan administrator.
Official source: Medicare: Working past 65 ↗
Check job coverage before deferring Medicare
Verify employer size, current-employment status, who pays first and Part B timing. An HSA incentive alone cannot establish that deferring Part B is safe. The Medicare working-past-65 guide provides the relevant decision path.
Official source: Medicare: Working past 65 ↗ · Medicare: Who pays first ↗
Keep dates and statements
Record HSA contribution months, your Social Security application date and the effective dates shown on your Medicare card. A plan or tax adviser can use those dates to assess any excess contribution correction.
Official source: Medicare: When coverage starts ↗ · SSA: Sign up for Medicare ↗