Best Payroll Service for an S-Corp Owner in 2026
Scoped to the one-person S-Corp. Which service handles the >2% shareholder health insurance W-2 add-back correctly? Which is actually affordable for one employee?
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Why Payroll Provider Choice Matters for S-Corp Owners
For a solo S-Corp owner, the payroll service must: (1) handle state employer registration, (2) file Form 941 quarterly and W-2/W-3 annually, (3) correctly add health insurance premiums to W-2 Box 1 wages at year-end for >2% shareholder health insurance (IRC Section 1372), and (4) be affordable for literally one employee.
Most major payroll providers handle items 1-2 correctly. Item 3 (the >2% shareholder health insurance W-2 add-back) is where errors occur with some providers that do not specifically support S-Corp owner payroll. This is a compliance error that creates a Form 1099/W-2 mismatch and can trigger IRS notices.
Comparison Table (One-Employee S-Corp, April 2026)
| Service | Monthly Cost (1 EE) | W-2/W-3 | State Filings | >2% Health W-2 | Notes |
|---|---|---|---|---|---|
| Gusto Simple | $40/mo + $6/ee | Yes | Yes (most states) | Yes (automatic) | Best for solo S-Corp. Handles S-Corp shareholder health insurance automatically. Strong integrations. |
| OnPay | $40/mo + $6/ee | Yes | Yes (all 50) | Yes | Flat pricing, all states included. Good S-Corp support. Similar to Gusto in functionality. |
| Patriot Payroll | $37/mo + $4/ee | Yes (add-on) | Add-on | Manual setup | Cheapest option but state filings cost extra. Good for budget-conscious owners comfortable with minor manual steps. |
| ADP Run | ~$60-$80/mo | Yes | Yes | Yes | More expensive for 1 person. Better for businesses expecting to grow. Enterprise features overkill for solo. |
| Paychex Flex | ~$60-$100/mo | Yes | Yes | Yes | Full-service, expensive for solo. Better for 5+ employees. See paychexpricing.com for exact quotes. |
| Square Payroll | $35/mo + $6/ee | Yes | Yes | Manual | Good if you already use Square for payments. Health insurance W-2 add-back requires manual configuration. |
| QuickBooks Payroll | $45-$100/mo | Yes | Yes | Yes | Best if you use QuickBooks Online for bookkeeping. Seamless integration. Health insurance handled automatically. |
Our Top Pick: Gusto for Most Solo S-Corp Owners
Gusto handles S-Corp owner payroll correctly: it automatically adds health insurance premiums to W-2 Box 1 wages for more-than-2% shareholders, covers all state tax filings, and is genuinely affordable for a single-owner business. Their onboarding is self-serve and most solo S-Corp owners can set up payroll without assistance.
If you are in multiple states or have employees beyond the owner, evaluate whether Gusto's pricing remains competitive. OnPay is a strong alternative at identical pricing with all-states coverage in the base plan.