HSA Contribution Limits

The IRS sets HSA contribution limits annually and publishes them by June 1 of the preceding year. For 2026, the limits come from IRS Revenue Procedure 2025-19. The limits depend on whether you have self-only or family HDHP coverage — not on whether your dependents are actually enrolled in the plan, but on your coverage tier under the qualifying HDHP.

2026 HSA Contribution Limits

The catch-up contribution of $1,000 is set by statute and has not changed since 2009. The base limits are indexed for inflation under Revenue Procedure 2025-19.

What Counts Toward the Limit

The annual limit applies to total contributions from all sources combined — your contributions, your employer's contributions, and any contributions from family members. If your employer contributes $1,000 to your HSA and you have self-only coverage, your maximum additional contribution is $3,400 in 2026 ($4,400 minus $1,000).

Your contributions. You can contribute via payroll deduction (pre-tax, reducing FICA in addition to income tax) or directly to your HSA custodian (deductible on your federal return on Schedule 1, but does not reduce FICA). For employed tech workers, payroll deduction is almost always more tax-efficient.

Employer contributions. Many large tech employers contribute to employees' HSAs — commonly $500–$1,500 per year. These contributions are excluded from your income and do not count toward your W-2 wages. They do count toward your annual HSA limit.

Family member contributions. A parent, grandparent, or anyone else can contribute to your HSA on your behalf. Contributions from others count toward your annual limit, and you (the account owner) claim the deduction.

Self-Only vs. Family Coverage: What Determines Your Limit

Your HSA limit is determined by your HDHP coverage tier — not by whether you have dependents, not by your family's enrollment in other plans.

Self-only coverage means you are the only person covered under the HDHP. You use the $4,400 limit.

Family coverage means the HDHP covers at least one other person in addition to you — a spouse, child, or other dependent. You use the $8,750 limit.

Important: If you have family HDHP coverage but your spouse is separately enrolled in a non-HDHP plan (such as their own employer's PPO), you still use the family HSA limit — but your spouse's non-HDHP coverage may restrict their ability to contribute to their own HSA.

Two spouses with separate HDHPs: If both spouses are enrolled in their own separate self-only HDHP plans (not the same family plan), each can contribute up to the self-only limit of $4,400 for a combined maximum of $8,800 — slightly more than the $8,750 family limit. Both catch-up contributions also apply if both are 55+.

The Catch-Up Contribution: Age 55 and Older

Individuals who are 55 or older by December 31 of the contribution year can contribute an additional $1,000 to their HSA on top of the standard limit. This catch-up amount is set by statute and does not change with inflation. For 2026:

• Age 55+, self-only HDHP: $4,400 + $1,000 = $5,400
• Age 55+, family HDHP: $8,750 + $1,000 = $9,750

If both spouses are 55 or older and each has a separate HSA, each can make their own catch-up contribution — but both cannot make catch-up contributions to the same HSA. The catch-up is per person, not per account.

Stop contributing at 65 (or 6 months before Medicare enrollment). Once you enroll in Medicare, you can no longer contribute to an HSA. If you enroll in Medicare mid-year, you can contribute a prorated amount for the months before Medicare enrollment. Critical: if you delay Medicare enrollment past age 65, Social Security will retroactively enroll you in Medicare Part A for up to 6 months. If you contributed to your HSA during those 6 months, those contributions become excess contributions subject to income tax and penalty. The safe rule is to stop HSA contributions 6 months before you plan to enroll in Medicare.

Prorating the Limit: Mid-Year HDHP Enrollment

If you were not enrolled in an HSA-eligible HDHP for the full year, your contribution limit is prorated based on the number of months you were eligible. The rule: you are eligible for any month in which you were enrolled in a qualifying HDHP on the first day of that month.

Example: You switch from a PPO to an HDHP on July 1, 2026. You are eligible for 6 months (July through December). Your maximum contribution is 6/12 × $4,400 = $2,200 (assuming self-only coverage).

The Last-Month Rule — use with caution. An exception called the last-month rule allows you to contribute the full annual limit if you are eligible on December 1 — even if you were only on an HDHP for one month. However, you must remain HSA-eligible through the end of the following year (the "testing period"). If you lose HDHP eligibility during the testing period, the excess contributions (above what you would have been entitled to under proration) become taxable income plus a 10% penalty.

Over-Contributions: The 6% Excise Tax

Contributing more than your annual limit — from any source — results in an excise tax of 6% per year on the excess amount, assessed annually as long as the excess remains in your account. This is reported on Form 5329.

To avoid the penalty: Withdraw the excess contribution and any earnings attributable to it by the due date of your tax return (April 15, or October 15 if you file an extension). If you catch the over-contribution and withdraw it in time, the excess is included in your taxable income but the 6% penalty does not apply.

Common causes of over-contribution:

• Employer contributions push the total over your limit
• Both spouses contribute as if they have separate limits when one has family coverage
• Medicare enrollment retroactively reduces your eligible months
• A mid-year coverage change that reduces your prorated limit
• Contributing the catch-up amount before reaching age 55

How to Maximize Your HSA Contribution

For employed tech workers, the most efficient approach is to maximize payroll deductions to the HSA limit as early in the year as possible. This maximizes the time your contributions are invested.

If your employer contributes to your HSA mid-year or at year-end, adjust your payroll elections to ensure total contributions do not exceed your limit. Most HSA custodians and many employers' benefits portals show year-to-date contributions from all sources.

If you did not maximize your HSA through payroll during the year, you can make a direct lump-sum contribution to your HSA account at any time before the tax filing deadline (April 15 of the following year, not counting extensions) and claim the deduction for the prior year. Unlike IRAs, HSA contributions made between January 1 and April 15 can be designated for the prior year.

California Note

California does not recognize HSA contributions as tax-deductible at the state level. Your federal contribution limit and deduction apply in full — contributing $4,400 as a single filer in the 37% federal bracket saves $1,628 in federal income tax. The California state tax saving, however, is zero.

California also taxes HSA investment earnings as ordinary income annually. If your HSA is invested in stock index funds and earns 8% per year, you owe California state income tax on that growth each year — unlike federal tax, where HSA earnings are permanently tax-free.

Despite this, the HSA remains beneficial for California residents: the federal tax saving on contributions is substantial, and qualified withdrawals are federal-tax-free. See What Is an HSA? for the full California analysis.