Critter#2 is correct that you cannot contribute to an HSA if you are on Medicare. But because not all seniors are on Medicare, please read the following.
The HSA contribution limits for taxpayers 55 and over are somewhat complex, so while the following answer is lengthy, it needs to be to cover each case that may apply to you.
For 2019, if you have self-only HDHP coverage, you can contribute up to $3,500. If you have family HDHP coverage, you can contribute up to $7,000.
You increase the limit by $1,000 for each taxpayer who is 55 or older. Thus, the maximum contribution allowed for a taxpayer, age 69, who has self-only HDHP (High Deductible Health Plan) coverage would be $4,500.
The maximum contribution limit for a taxpayer under family HDHP coverage in 2019 is $7,000. If the taxpayer with the HSA is 55 or older, this amount is increased to $8,000.
If the spouse is also under an HDHP and has an HSA, the maximum aggregate contribution limit for the two HSAs is still
- $7,000 if neither taxpayer is 55 or over,
- $8,000 if one taxpayer is 55 or older,
- $9,000 if both taxpayers are 55 or over.*** see below
***Note that an HSA belongs to an individual. Even if both spouses are covered by a family HDHP plan, they do not have a joint HSA, but either (1) one taxpayer has the HSA or (2) each taxpayer can have his/her HSA. But the absolute contribution limit for a taxpayer 55 or over to his/her HSA is $8,000. This means that if the two taxpayers qualify for the $9,000 limit, then at least $1,000 must go into the spouse’s HSA (except for the $1,000 minimum in this case to each HSA, the contributions under the Family limit can be divided between the two HSAs as the taxpayers see fit).
[Edited 3/17/2020 4:09 pm CDT - updated for 2019]
