A health savings account is the only account in the tax code with three tax breaks: deductible contributions, tax-free growth, and tax-free withdrawals for medical costs. Contributions made through payroll also avoid Social Security and Medicare tax, which a 401(k) doesn't do.
2026 limits and eligibility
| 2026 | 2027 | |
|---|---|---|
| Self-only contribution | $4,400 | $4,500 |
| Family contribution | $8,750 | $9,000 |
| Catch-up, age 55+ | $1,000 | $1,000 |
| Minimum plan deductible, self / family | $1,700 / $3,400 | $1,750 / $3,500 |
Employer contributions count toward the limit. You can't contribute once you're enrolled in Medicare.
If you have an RSU vest, a large bonus, or a job change this year, Summer Associates can project your tax and recommend W-4 changes before year-end.The first consultation is free, with no obligation.
Book a free consultationWhat changed in 2026
- Bronze and catastrophic plans are now treated as HSA-compatible, whether bought on or off the marketplace, which opens HSAs to many self-purchased plans.
- Direct primary care arrangements costing up to $150 a month ($300 for families) no longer disqualify you, and HSA funds can pay for them.
- Telehealth coverage before the deductible is permanently allowed, retroactive to plan years starting in 2025.
Key numbers: $4,400 self-only · $8,750 family · +$1,000 at 55 · payroll contributions avoid FICA (7.65% below the $184,500 Social Security wage base).
The shoebox strategy
- Contribute the maximum through payroll.
- Pay current medical bills from regular cash if you can afford to.
- Save every receipt digitally.
- Invest the HSA in low-cost index funds.
- Years later, reimburse yourself tax-free for those old receipts. There is no deadline as long as the expense came after the HSA was established.
After 65, non-medical withdrawals are taxed like a traditional IRA with no penalty, so the account is never worse than an IRA.
A worked example
A family contributes $8,750 a year through the payroll of a spouse earning under the $184,500 Social Security wage base, at a 24% federal and 5% state bracket. Annual tax savings come to about $2,540 of income tax plus $670 of FICA, or roughly $3,200 a year. Invested at 6% for 20 years with no withdrawals, the contributions grow to about $320,000, which is available tax-free for medical costs in retirement.
For a Connecticut resident, the state portion of these savings holds. Connecticut starts from federal AGI and has no HSA add-back, so HSA contributions reduce Connecticut income as well. Not every state allows this.
Common mistakes
- Contributing during months you weren't HSA-eligible. The last-month rule carries a 13-month testing period.
- Keeping the balance in cash at 0.1%.
- Contributing after enrolling in Medicare Part A, including retroactive Part A enrollment when you claim Social Security after 65.
- Losing the receipts.
How Summer Associates helps
Summer Associates compares HSA plans against your alternatives at open enrollment, handles Form 8889 correctly, and plans the Medicare transition so you don't over-contribute.
Sources
This guide is general education based on federal and Connecticut law as of 2026-11-15. State rules differ and facts matter. Before acting, get advice for your situation from Summer Associates or another qualified advisor.