HSA Contribution Limits and the 55+ Catch-Up
Last verified: 2026-05-01, against Rev. Proc. 2025-19 (2026 HSA limits).
The Health Savings Account is the only account in the U.S. tax code that is deductible going in, tax-free growing, and tax-free coming out when used for qualified medical expenses. The contribution limits are the gate to all three benefits. Here is exactly how much, and exactly when.
2026 contribution limits
- Self-only HDHP coverage: $4,400
- Family HDHP coverage: $8,750
- Age-55 catch-up (per spouse): +$1,000
The limits are set under IRC §223(b) and adjusted annually for inflation; the 2026 amounts were published in Revenue Procedure 2025-19. The $1,000 catch-up has been stuck at $1,000 since 2009 because §223(b)(3) was written as a flat dollar figure with no indexing language.
Who is eligible to contribute
You must be enrolled in a high-deductible health plan (HDHP) on the first day of the month, have no other disqualifying coverage, not be enrolled in Medicare, and not be claimed as a dependent. An HDHP for 2026 is defined as a plan with at least a $1,700 deductible (self) or $3,400 (family), and an out-of-pocket maximum no greater than $8,500 (self) or $17,000 (family).
The two-spouse situation
If both spouses are 55 or older and both want the catch-up, each must contribute their $1,000 to a separate HSA in their own name. There is no joint HSA. A family of two with both spouses age 55+ can therefore contribute $8,750 (family) + $1,000 + $1,000 = $10,750 total, but only if it is split across two accounts.
The last-month rule and the testing period
If you are HSA-eligible on December 1 of the year, the last-month rule under IRC §223(b)(8) lets you contribute the full annual limit as if you had been eligible all year. The catch: you must remain eligible through the entire following calendar year (the "testing period"). Breaking the testing period turns the excess contribution into taxable income and triggers a 10% additional tax under §223(f)(5).
Common mistakes
- Contributing while on Medicare. Enrollment in any part of Medicare, including Part A only, ends HSA eligibility. Social Security enrollment after age 65 retroactively enrolls you in Part A for up to six months. Stop HSA contributions six months before claiming Social Security after 65.
- Treating the family limit as combined. Family-coverage spouses share the $8,750 family limit but can allocate it between two HSAs in any proportion. The $1,000 catch-up is per spouse and cannot be doubled into one account.
- Missing the prior-year contribution window. You can contribute for 2026 until April 15, 2027, but tell the custodian to code the deposit "prior year."
- Investing the cash drag. Most HSAs default to a cash sweep paying near zero. Move balances above the working cushion into the HSA's investment menu. That is where the tax-free growth lives.
Sources
- Internal Revenue Code §223, Health Savings Accounts (Cornell LII): law.cornell.edu/uscode/text/26/223
- IRS Revenue Procedure 2025-19, 2026 HSA inflation-adjusted amounts: irs.gov/pub/irs-drop/rp-25-19.pdf
- IRS Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans: irs.gov/forms-pubs/about-publication-969
- IRS Form 8889 instructions, HSA reporting: irs.gov/forms-pubs/about-form-8889
- Centers for Medicare & Medicaid Services, Medicare enrollment and HSA interaction: medicare.gov/basics/get-started-with-medicare/sign-up
RetirementCheck101 confirms your HDHP eligibility and sizes your HSA gap automatically. Explore the free educational tool to lock in the deduction.
Frequently Asked Questions
How much can I contribute to an HSA in 2026?
The 2026 limits are $4,400 for self-only high-deductible coverage and $8,750 for family coverage. Both figures are set under IRC 223(b), are adjusted annually for inflation, and were published for 2026 in Revenue Procedure 2025-19.
What is the HSA catch-up contribution at age 55?
An additional $1,000 per person, available beginning in the year you turn 55. The amount has remained $1,000 since 2009 because the statute was drafted as a flat dollar figure with no indexing language, so it has quietly lost purchasing power for more than fifteen years.
Can my spouse and I both make the 55-plus catch-up contribution?
Yes, but each spouse's $1,000 must be contributed to an HSA held in that spouse's own name, because the code recognizes no joint HSA. A couple in which both spouses are 55 or older may therefore contribute $8,750 under family coverage plus $1,000 apiece, for $10,750 in total, provided the contributions are split across two separate accounts.
What counts as a high-deductible health plan in 2026?
For 2026 the plan must carry a deductible of at least $1,700 for self-only coverage or $3,400 for family coverage, with an out-of-pocket maximum no greater than $8,500 or $17,000 respectively. Eligibility further requires that you hold no other disqualifying coverage, that you not be enrolled in any part of Medicare, and that you not be claimed as a dependent on another taxpayer's return.
What is the HSA last-month rule?
A taxpayer who is HSA-eligible on December 1 may contribute the full annual limit as though eligibility had existed for the entire year. The provision carries a testing period: eligibility must continue through the whole of the following calendar year, and a taxpayer who breaks that period converts the accelerated portion into an excess contribution with the associated tax.