2026 HSA Contribution Limits, Proration & the New OBBBA Eligibility Rules

Employer contributions reduce your own room — the most common mistake

If your employer contributes $1,200 toward a family HSA in 2026, your own remaining room isn't $8,750 — it's $7,550. Payroll systems don't always account for this automatically when calculating your per-paycheck deduction, especially if the employer deposit lands as a lump sum early in the year. Check your custodian's year-to-date total, not just your own payroll stub, partway through the year.

Proration: the limit is set monthly, not annually

Technically, §223(b)(2) sets your contribution limit month by month, based on your HDHP eligibility on the first day of that month. If you're only eligible for part of the year, your limit is prorated:

The last-month rule is an exception worth knowing, and worth being careful with. If you're HSA-eligible on December 1, you can contribute the full annual limit even if you were only covered for one month. The catch: you must remain HSA-eligible through the end of the following calendar year — the "testing period." Lose eligibility during that window and the amount you contributed above your prorated figure becomes taxable income, plus a 10% additional tax. Most people who plan to stay on an HDHP into the next year are fine; the risk is real for anyone expecting a job change, a Medicare enrollment, or a switch to a spouse's non-HDHP plan.

The One Big Beautiful Bill Act (Pub. L. 119-21, signed July 4, 2025) changed HSA eligibility rules. The IRS issued implementing guidance in Notice 2026-5, and these provisions apply for months beginning after December 31, 2025 — meaning they cover your entire 2026 plan year, right now.

1. Bronze and catastrophic Exchange plans now qualify as HDHPs

Before 2026, most ACA marketplace bronze plans failed the HDHP test — their out-of-pocket maximums exceeded the statutory HDHP limit, or they covered services before the deductible in ways that disqualified them. Under the amended rules, any bronze or catastrophic plan available as individual coverage through an ACA Exchange is now treated as an HDHP, even if it doesn't independently meet the minimum deductible or out-of-pocket requirements. This applies whether you actually bought on-Exchange or off-Exchange, as long as the same plan is available on an Exchange.

If you buy your own coverage on the marketplace and were told in past years that your bronze plan didn't qualify for an HSA, it's worth checking again for 2026.

2. Direct primary care no longer disqualifies you

A direct primary care service arrangement (DPCSA) — paying a flat monthly fee to a primary-care practice for unlimited visits — used to be treated as a disqualifying health plan that blocked HSA eligibility entirely. Under OBBBA, it no longer is, as long as the fee doesn't exceed $150/month for one person or $300/month for an arrangement covering more than one person. As a bonus, DPC fees within those caps are now themselves HSA-reimbursable expenses.

3. The telehealth safe harbor is now permanent

A temporary CARES Act provision let HDHPs cover telehealth visits before the deductible was met, without disqualifying the plan. That provision had lapsed and been extended repeatedly. OBBBA makes it permanent, retroactive to plan years beginning after December 31, 2024.