For 2026, HSA contribution limits are $4,400 if you have self-only high deductible health plan coverage and $8,750 if you have family coverage.1Internal Revenue Service. Rev. Proc. 2025-19 Account holders who are 55 or older by year-end can add another $1,000. Every deposit for the 2026 tax year, from you or your employer, must reach the account by April 15, 2027.
The 2026 Numbers at a Glance
The IRS sets HSA ceilings each year in a revenue procedure, and Rev. Proc. 2025-19 governs 2026.1Internal Revenue Service. Rev. Proc. 2025-19 Two figures matter:
- $4,400 for self-only HDHP coverage
- $8,750 for family HDHP coverage
Those are the combined totals from every source. If your employer puts $1,200 into your account during the year and you have self-only coverage, your own contributions can go up to $3,200, not $4,400.
Catch-Up for Age 55 and Older
If you turn 55 or older before December 31 of the tax year, you can add an extra $1,000 on top of the base limit.2Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts That raises your 2026 effective cap to $5,400 (self-only) or $9,750 (family). The $1,000 catch-up is fixed in the statute and does not adjust for inflation.
Married couples where both spouses are 55 or older each get the extra $1,000, but the two catch-up amounts cannot go into a single account. Each spouse needs their own HSA to deposit their own catch-up. If only one spouse is 55, only that spouse gets the extra room.
Payroll Deductions Save More Than Personal Deposits
How the money gets in changes the tax result. Contributions run through an employer cafeteria plan (Section 125) come out before federal income tax, Social Security tax, and Medicare tax are calculated.3Internal Revenue Service. FAQs for Government Entities Regarding Cafeteria Plans You save the 7.65% FICA tax on top of the income tax deduction. Contribute directly to the HSA on your own and you still get the income tax deduction on your return, but you do not recover the FICA piece.
If You Are Still Contributing for a Prior Year
Use the limit that applied to the year the contribution is for, not the current year. The 2025 caps were $4,300 (self-only) and $8,550 (family); the 2024 caps were $4,150 and $8,300.4Internal Revenue Service. Revenue Procedure 2024-25
Whether You Can Contribute at All
The contribution limit only matters if you qualify as an “eligible individual” for the month in question. Federal law requires all four of these to be true:2Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts
- You are enrolled in a qualifying HDHP.
- You have no other health coverage that duplicates HDHP benefits (dental, vision, disability, long-term care, and accident-only policies are fine; a general-purpose FSA is not).
- You are not enrolled in any part of Medicare.
- No one else claims you as a dependent on their tax return.
What Counts as an HDHP in 2026
Your plan qualifies for 2026 only if it meets both thresholds:1Internal Revenue Service. Rev. Proc. 2025-19
- Minimum annual deductible of $1,700 (self-only) or $3,400 (family).
- Maximum out-of-pocket costs of $8,500 (self-only) or $17,000 (family), counting deductibles, copays, and coinsurance but not premiums.
If either number falls outside the range, the plan is not an HDHP for HSA purposes, and any contributions you make while covered under it can be treated as excess contributions.
The Medicare Trap at 65
Enrolling in any part of Medicare, including Part A alone, ends your eligibility to make new HSA contributions. If you stay working past 65 and delay Medicare, you can keep contributing. When you eventually apply, know that Social Security can backdate Part A coverage by up to six months. Any HSA deposits made during that retroactive window become excess contributions. If you plan to enroll, stop contributing at least six months before you apply.
Enrolling in Medicare does not touch the balance you already have. The money remains yours and can still pay qualified medical expenses tax-free, including Medicare premiums other than Medigap.
The Deadline: April 15 of the Following Year
You have until April 15, 2027 to make 2026 contributions. Filing a tax extension does not push this date. Even if your return goes on extension to October, HSA money for the prior year still has to land by April 15, and anything that arrives later counts toward the current year instead.5Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
Between January 1 and April 15, tell your HSA custodian which tax year each deposit is for. Otherwise they will usually default to the current year, and a contribution you meant to apply to last year’s limit gets used up on this year’s.
Partial-Year Coverage and the Last-Month Rule
If you were only covered by an HDHP for part of 2026, your limit is normally prorated: annual limit divided by 12, multiplied by the number of eligible months. Seven months of self-only coverage in 2026 works out to roughly $2,567 ($4,400 ÷ 12 × 7).
There is a shortcut. If you have qualifying HDHP coverage on December 1, the IRS treats you as eligible for the whole year and lets you contribute the full annual amount.5Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans Enroll in September 2026, stay covered on December 1, and you can deposit the full $4,400 or $8,750.
The condition is a 13-month testing period. You have to keep qualifying HDHP coverage from December 1 of the contribution year through December 31 of the following year. Drop the HDHP inside that window and the amount you contributed above your prorated limit gets added back to taxable income, plus a 10% penalty on that amount.5Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans Death and disability are the only exceptions.
What Happens If You Contribute Too Much
Going over your limit triggers a 6% excise tax on the excess amount, and that tax repeats every year the excess stays in the account.6Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities Catching it early matters.
You can avoid the excise tax by pulling out the excess, along with any earnings it produced, before your tax filing deadline (including extensions) for the year of the over-contribution.6Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities The withdrawn earnings get reported as income for that year, but the recurring 6% goes away. Your custodian reports total annual contributions to the IRS on Form 5498-SA, so any mismatch is visible.
The usual cause of an accidental overage is a mid-year job change. If both your old and new employers made HSA deposits and you also contributed personally, the total can slip past the limit without you noticing. Track every source through the year rather than reconstructing it at tax time.