The maximum contribution allowed each year depends on the type of HDHP coverage you have, your age, and how many months during the calendar year you are eligible to contribute to an HSA.
If you are eligible for all 12 months of the year and have self-only coverage:
Contribution limit for 2020 – $3,550
If you are eligible for all 12 months of the year and have family coverage:
Contribution limit for 2020 – $7,100
If you are age 55 or older, you may also make a catch-up contribution of $1,000 per year.
If you are HSA-eligible for only a portion of the year, you must prorate your contribution limit for the number of months you are eligible. For example, if you were covered by an HDHP for 4 months of the year, you may contribute 4/12 of the maximum contribution limit for the type of coverage you had.
HSA contributions made by your employer count towards your annual limit.