HSA Catch-Up Contribution at 55: $1,000, Prorated
The HSA catch-up for anyone 55 or older at the end of the tax year is $1,000. It is statutory, not indexed, and it prorates by eligible months.
If you are 55 or older on the last day of the tax year, your HSA limit rises by $1,0001. The amount is set by statute and not indexed. It prorates by eligible months.
The HSA contribution limit calculator applies both tests — the annual age test and the monthly eligibility test — to one year at a time.
Who qualifies
Publication 969 states the condition on a single date. An eligible individual “who is age 55 or older at the end of your tax year” has a contribution limit increased by $1,0001.
The end of the tax year is December 31 for almost everyone. Your birthday inside the year does not matter to the age test. Someone who turns 55 on December 30 meets it, and someone who turns 55 on January 2 of the following year does not.
There is a second condition in the same sentence: you must be an eligible individual. The catch-up is an increase to a limit, so it needs a limit to increase.
The amount does not move
The catch-up is fixed by statute at $1,0001 and is not adjusted for inflation. That makes it the one HSA number you can carry between years without checking.
Everything around it does move. The IRS resets the annual limits each year in a revenue procedure.
| Coverage type | 2026 annual limit | 2027 annual limit | Age-55 catch-up |
|---|---|---|---|
| Self-only | $4,4002 | $4,5003 | $1,0001 |
| Family | $8,7504 | $9,0005 | $1,0001 |
The 2026 figures come from Rev. Proc. 2025-19 and the 2027 figures from Rev. Proc. 2026-24, issued May 29, 2026.
It prorates like everything else
The age test is annual. The amount is monthly.
The Additional Contribution Amount Worksheet in the Instructions for Form 8889 multiplies the catch-up by the number of months you were an eligible individual, then divides by twelve. A person who is 56 all year but HSA-eligible for only six months gets half of the catch-up, not all of it.
This is the point most often missed, because the age condition is written as a yes-or-no test and the money is not.
Example. A hypothetical taxpayer is 58 years old and eligible on the first of April through December. Nine eligible months out of twelve give nine twelfths of the catch-up, alongside nine twelfths of the base annual limit. The proration rules work the same way on both lines.
The one exception runs upward: the last-month rule treats you as an eligible individual for the entire year, which makes the worksheet’s month count twelve.
A month with Medicare is a zero month
Publication 969: “Beginning with the first month you are enrolled in Medicare, your contribution limit is zero.” That zero covers the catch-up, not only the base limit.
Age 65 is also the usual Medicare age, so the catch-up years and the Medicare years overlap for most people. What the overlap does to a partial year is set out in Medicare and your HSA.
The money has to go into your own account
Publication 969, on married couples: “Each spouse must make the additional contribution to their own HSA.” A couple cannot route both catch-ups through one account, even when they share a single family limit.
That is the practical reason a spouse who is 55 or older and has no HSA of their own leaves the catch-up unused. The rules for married couples cover the shared family limit alongside it.
How much is the HSA catch-up contribution?
It is $1,0001 for a full year of eligibility. Publication 969 grants it to an eligible individual who is “age 55 or older at the end of your tax year”.
Do I get the full catch-up if I turn 55 in December?
Yes, if you were an eligible individual for the whole year. The age test looks only at the last day of the tax year; the proration looks at eligible months, not at your birthday.
Does the age-55 catch-up get prorated?
Yes. The Additional Contribution Amount Worksheet in the Instructions for Form 8889 multiplies it by eligible months and divides by twelve.
Can my spouse’s catch-up go into my HSA?
No. Publication 969 requires each spouse to make the additional contribution to their own HSA, so a spouse aged 55 or older needs an account in their own name to use it.
Does the catch-up amount change with inflation?
No. It is set by statute rather than by the annual revenue procedure, and it is the same for 2026 and 2027 while the base limits rise.
Is there a catch-up above age 65?
No. There is one catch-up amount and one age threshold. Enrolling in Medicare, which most people do at 65, sets the contribution limit to zero from that month.
When is the deadline for a catch-up contribution?
The same deadline as any other HSA contribution for the year. For the 2026 tax year that is April 15, 20276.
Open the HSA calculator →Sources
Information, not advice. This is the reading version; the interactive calculator and the full page are at https://thresholds.pages.dev/hsa/age-55-catch-up/.