Payroll Outsourcing Services: How to Outsource Payroll in 2026

Payroll outsourcing services are when a business hires an outside company to run its payroll. The provider calculates pay and withholdings, pays employees by direct deposit, deposits and files payroll taxes, and prepares year-end W-2s and 1099s, while the business submits hours and approves each payroll.

Most payroll outsourcing services include payroll processing, direct deposit, federal, state and local tax deposits and filings, quarterly Form 941 and annual Form 940 returns, W-2s and 1099s, new hire reporting, wage garnishments and an employee self-service portal. Time tracking, benefits administration and HR support are often add-ons.

Most small businesses pay $29 to $50 per month plus $5 to $7 per employee for full-service payroll, or about $87 to $120 per month for 10 employees. Mid-sized companies typically pay $12 to $30 per employee per month, and a PEO costs roughly $100 to $250 per employee per month.

For most businesses with fewer than 500 employees, yes. Outsourcing usually costs less than a payroll employee or the owner’s time, keeps up with tax law changes automatically, and lowers the risk of late-deposit penalties, which run from 2% to 15% of the unpaid tax.

Yes, in most cases. The IRS holds the employer ultimately responsible for depositing and paying federal payroll taxes even when a payroll service provider handles them. The main exception is an IRS-certified PEO, which takes on liability for federal employment taxes on the wages it pays.

A payroll outsourcing company runs payroll and files taxes while your business remains the only employer. A PEO becomes a co-employer, adding HR support, workers’ compensation and access to large-group benefits, which is why PEOs cost more per employee.

Payroll software calculates pay and may file taxes, but you run each payroll yourself. Full payroll outsourcing hands more of the work to the provider, often including a dedicated specialist who processes payroll and resolves tax notices for you.

Small businesses can usually switch to an online payroll provider in one to three weeks. Mid-sized companies moving to a managed or HCM provider typically need four to twelve weeks, including data migration and a parallel payroll run.

Consider outsourcing payroll when you hire your first employees, add workers in another state, receive a tax notice or penalty, spend more than a few hours a month on payroll, or lose the person who has been running it.

Providers need your EIN, state tax account numbers and unemployment rates, your federal deposit schedule, employee W-4s and state withholding forms, pay rates and schedules, direct deposit details, benefit deductions and year-to-date wages and taxes if you switch mid-year.

Form 8655, Reporting Agent Authorization, lets a payroll provider sign and file certain federal payroll tax returns and make tax deposits on your behalf. Signing it does not transfer your liability for the taxes.

Yes. Most payroll outsourcing services handle multi-state payroll, though some charge per additional state. For employees in other countries, you can use a global payroll provider if you have a local entity or an employer of record if you don’t.