What it is
TL;DRSelf-employed taxpayers and 2% S-corp shareholders can deduct 100% of their health insurance premiums above the line, AND contribute to a Health Savings Account if they have a qualifying high-deductible health plan. Stacked, these are 100% deductible permanent deductions, no phase-out, no itemizing required.
The premium deduction is sometimes missed entirely. The HSA contribution is often capped below the maximum. Together, they can move $15k-$25k off taxable income every year, indefinitely.
For S-corp owners, the mechanics matter: the premium must be paid by the corporation, reported on the W-2 as wages (but not subject to FICA), and then deducted on the 1040 above the line.
Who it's for
Anyone self-employed or operating through an S-corp who pays for their own health insurance.
- ✓Sole proprietors and single-member LLCs
- ✓S-corp owners (with proper W-2 reporting)
- ✓Partners in partnerships
- ✓Anyone eligible for a Health Savings Account under a qualifying HDHP
- ×W-2 employees on employer-provided health coverage
- ×Anyone enrolled in Medicare (no new HSA contributions allowed)
- ×Owners whose spouse has subsidized non-HDHP coverage they're also enrolled in
How it works
1. Confirm eligibility
Self-employed individuals, partners receiving guaranteed payments, and 2%+ S-corp shareholders all qualify for the §162(l) premium deduction.
HSA eligibility requires a high-deductible health plan (minimum deductible $1,650 / $3,300 for 2026), no other non-HDHP coverage, no Medicare, and not being claimed as a dependent.
2. Pay premiums through the right entity
Sole proprietor: pay directly, deduct on Schedule 1 line 17.
S-corp: corporation pays the premium, reports the amount as W-2 wages (Box 1) but excludes from Box 3 and 5 FICA wages. Owner deducts on Schedule 1.
3. Contribute to the HSA
2026 limits: $4,400 self-only, $8,750 family, plus $1,000 catch-up at age 55+. HSA contributions made directly (not through payroll) are above-the-line deductions.
S-corp owners cannot make pre-tax HSA contributions through payroll. Always contribute personally and deduct on Schedule 1.
HSA dollars used for qualified medical expenses come out tax-free. Held to age 65, they can also be used for non-medical expenses subject only to income tax, effectively functioning as an extra IRA.
4. Optionally fund as a long-term investment
Many providers (Fidelity, Lively) offer HSAs with full brokerage access. Funding the HSA each year and investing it, rather than spending it, turns the HSA into one of the most tax-favored accounts in the entire code.
A worked example
Eli is a 47-year-old solo S-corp consultant taking $185,000 in W-2 from his corporation. He pays $14,400/yr for a family HDHP. He contributes the full family HSA limit each year and invests it.
| Not deducting, no HSA | Premium deduction + max HSA | |
|---|---|---|
| Health insurance premiums | $14,400 | $14,400 |
| Premium deduction on Schedule 1 | $0 | $14,400 |
| HSA contribution (family) | $0 | $8,750 |
| Total above-the-line deduction | $0 | $23,150 |
| Federal + state tax saved (32% blended) | $0 | $7,400 |
| Annual tax saved | $7,400 |
Eli saves about $7,400 in tax every year, and the $8,750 going into the HSA compounds tax-free for the rest of his life. Over 20 years invested at 7%, that's a $370k tax-free medical/retirement account built from premium-eligibility cash he was spending anyway.
Limits and risks
S-corp owners frequently miss the W-2 reporting step. Without the premium showing on the W-2, the §162(l) deduction is disallowed.
Family coverage on a non-HDHP through a spouse's employer disqualifies HSA contributions, including coverage you forget you're on.
Once enrolled in Medicare (typically age 65), no further HSA contributions are allowed. Existing balances remain usable.
This is a low-audit, high-leverage strategy. The main exam issue is incorrect S-corp W-2 reporting, which is procedural and easily fixed via amended W-2.
IRS reference
- IRC §162(l)Self-employed health insurance deduction, above the line.
- IRC §223Health Savings Account rules.
- IRS Notice 2008-1S-corp 2% shareholder health insurance treatment.