When must HSA contributions stop?

Once an individual enrolls in Medicare, contributions, including catch-up contributions, cannot be made beginning with the month the individual enrolls.

EXAMPLE: EXAMPLE: Pearl, who is covered under an HDHP with self-only coverage, attains age 65 and enrolls for Medicare benefits on March 1, 2020. Her 2020 contribution limit is 2/12 of the statutory contribution limit. She may make contributions for January and February but may not make any contributions for March through December 2020 or thereafter.