$23K+
estimated annual cost of processing payroll in-house for a 10-person small business when you count staff time, tax filing errors, compliance penalties, and software subscriptions across disconnected tools
$45–$180/mo
all-in monthly cost range for a full-service payroll company serving a 10-employee small business: full-service means automated tax filing, direct deposit, and year-end W-2s included at no extra charge
Full-service only
the correct standard for any small business payroll company evaluation: “full-service” means the vendor files and pays federal, state, and local payroll taxes automatically. Anything less shifts compliance risk back to you
What Makes a Payroll Company Right for a Small Business
Payroll companies for small businesses handle what in-house payroll management cannot do cost-effectively: automated tax filing across every federal, state, and local jurisdiction. Direct deposit on a consistent schedule. Year-end W-2 and 1099 generation. And new-hire reporting to state agencies. The operational value is straightforward: these are compliance-heavy, error-sensitive tasks that take significant owner time to manage manually and carry real financial penalties when done incorrectly.
The selection decision comes down to three variables: whether the platform is full-service (taxes filed automatically, not just calculated), whether it integrates with your accounting software (QuickBooks, Xero, or FreshBooks), and what the true all-in monthly cost is at your employee count: including base fees, per-employee charges, and the add-ons you actually need. The advertised per-employee fee is rarely the complete number.
The full-service requirement: do not evaluate any payroll company that is not full-serviceSelf-service payroll platforms calculate payroll and produce pay stubs but require you to manually file and remit payroll taxes to each jurisdiction. For a small business with employees in one state, this is manageable but still error-prone. For any business with remote employees in multiple states, self-service payroll is a compliance management problem masquerading as a cost savings. Full-service payroll companies file and pay taxes on your behalf: that is the standard to require before any other evaluation begins.
Monthly All-In Payroll Service Cost by Company: 5 to 50 Employees (Estimated)
Payroll Outsourcing ROI Calculator
Best Payroll Companies for Small Business: Head-to-Head Comparison
| Company | Best for | Full-service tax filing | Base cost (est.) | Per-employee fee | Standout |
|---|---|---|---|---|---|
| Gusto | 1–50 employees needing the cleanest full-service payroll + HR in one platform | Yes: all states, automatic | $46/mo (Simple) | $6/mo | Best onboarding flow. Contractor payments included. Direct integration with most accounting platforms |
| OnPay | Businesses wanting straightforward full-service payroll at a flat per-employee rate | Yes: all states, automatic | $40/mo base | $6/mo | Flat-fee pricing with no add-on tiers. Strong multi-state support. Good for agriculture and nonprofits |
| QuickBooks Payroll (Core) | Businesses already on QuickBooks accounting: integrated native integration | Yes: auto-pay and file | $50/mo (Core) | $6/mo | Real-time sync with QuickBooks. Same-day direct deposit on Payroll Premium. No double data entry |
| ADP RUN (Essential) | Small businesses that need dedicated payroll support staff and phone access | Yes: error guarantee included | Quote-based (~$60–$80/mo for 5 employees) | ~$4–$5/mo | 24/7 payroll specialist support. Guaranteed accuracy. Strong for multi-state. Scales to enterprise |
| Paychex Flex | Businesses wanting integrated benefits administration alongside payroll | Yes: dedicated account rep | Quote-based (~$60/mo for 5 employees) | ~$4–$5/mo | Dedicated payroll specialist per account. Strong HR + benefits bundle. Best retirement plan integration |
| Square Payroll | Hourly businesses already on Square POS: payroll integrates with time tracking | Yes: contractor-only plan available | $35/mo + $6/employee (employees). $6/contractor only plan | $6/mo | Lowest cost for contractor-heavy businesses. Automatic tip reporting. Best POS-payroll integration |
“The best payroll company for a small business is the one that eliminates payroll as a source of owner anxiety: not just a source of owner time. A platform that runs payroll correctly, files taxes automatically, and calls you only if something needs attention is worth more than a cheaper platform that requires monthly manual verification.”
Choosing and Switching Payroll Companies: 5 Steps
- Confirm full-service tax filing is included before requesting a price. Every payroll company positions itself differently, and the phrase “full-service” is not consistently defined. Before any pricing conversation, confirm three things explicitly: (1) the platform files and pays federal payroll taxes automatically every pay period, (2) it handles state income tax withholding and unemployment taxes in every state where you have employees, and (3) year-end W-2 and 1099-NEC filing is included in the quoted price. Any platform that answers “no” to any of these is not a full-service payroll company and should not be considered further.
- Calculate the true all-in monthly cost before comparing platforms. Payroll companies typically quote a base fee plus a per-employee fee, but the actual monthly cost includes add-ons you will need: multi-state payroll processing (usually an additional charge), contractor payments, HR features, and year-end filing. Before accepting any comparison, ask for the cost of: your exact employee count, all states you have employees in, W-2/1099 year-end filing, and any HR features you use. The advertised price is almost always lower than the actual bill.
- Verify accounting software integration before committing. If your business runs on QuickBooks, Xero, or FreshBooks, confirm that the payroll platform has a direct, automatic integration: not a manual CSV export. The integration should sync payroll journal entries, employee records, and contractor payments automatically after each payroll run. A payroll platform that requires manual data entry into your accounting software after each run creates exactly the reconciliation burden that an integrated platform is supposed to eliminate.
- Run a parallel payroll before cutting over fully. When switching payroll companies, run the first payroll on the new platform in parallel with your existing system: comparing the gross-to-net calculations, tax withholding amounts, and direct deposit timing line by line before canceling the old service. This parallel run catches setup errors (incorrect state tax rates, missing employee deductions, wrong pay rates) before they affect employees. The cost is one extra payroll run. The alternative is a correction cycle that damages employee trust and takes three pay periods to fully resolve.
- Set up new hire reporting and state unemployment accounts before the first payroll run. Full-service payroll companies handle ongoing tax filings, but they typically require you to provide existing state employer account numbers at setup. Before going live, confirm that you have active payroll tax accounts in every state where you have employees and that these account numbers are entered in the platform. A payroll company cannot file state unemployment taxes on your behalf without a valid state employer account. And the penalty for missed filings accrues regardless of which party was responsible for the setup gap.
Tip: Gusto is the strongest default choice for 1–25 employee small businesses selecting a payroll company for the first timeGusto’s Simple plan ($46/month + $6/employee) provides full-service payroll with automatic federal and state tax filing, direct deposit, contractor payments, and a clean onboarding flow that most small business owners can configure without professional help. It integrates directly with QuickBooks, Xero, and FreshBooks. For businesses that want payroll and HR in one platform without complexity, Gusto covers both. ADP and Paychex offer more at scale with dedicated support representatives, but for a first payroll system at 1–25 employees, Gusto’s combination of pricing, features, and setup simplicity is hard to match.
Comparing payroll software features and pricing in detail for your business size?
