How to Switch Payroll Providers Without Missing a Paycheck

You can switch payroll providers at any time, but the cleanest switch happens at the start of a quarter (January 1, April 1, July 1 or October 1) because the new provider does not have to re-file the current quarter. Plan on two to four weeks from signing to first payroll. Most providers, including OnPay, Gusto and Paychex, migrate your employee and year-to-date data for free.

Verified November 2026

When to switch

Any payroll date works, but a quarter boundary avoids split-quarter tax filings. The single best date is January 1: no year-to-date history to migrate and your old provider still issues last year's W-2s. The second-best is the first payroll after any quarter end. If you are mid-quarter and unhappy, switch anyway; the new provider will load year-to-date totals so W-2s come out right.

What to collect before you sign

• Federal EIN and state withholding and unemployment account numbers
• State unemployment (SUTA) rate notice for the current year
• Year-to-date payroll register by employee (gross, taxes, deductions)
• Quarterly tax filings (941s) for the current year
• Employee details: W-4s, direct deposit, addresses, pay rates
• Benefits deduction amounts and any garnishment orders
• Your current contract and cancellation terms

The switch, step by step

1. Get quotes and pick. Use the comparison or request quotes.
2. Sign and give the new provider your documents. Most assign an implementation specialist.
3. Run a parallel payroll. Enter one pay period in both systems and compare net pay to the penny.
4. Tell your old provider the final payroll date in writing. Confirm who files the final quarter and year-end forms.
5. Update tax agency notices. Some states require you to name your new payroll agent.
6. Run the first live payroll two days early. Direct deposit timing differs between providers.

Common mistakes

• Letting the old provider auto-renew (read the cancellation window)
• Forgetting to move garnishments and child-support orders
• Not confirming who files the final quarter
• Switching the week of a holiday when bank cut-offs move

Frequently asked questions

Can I switch payroll providers mid-year?

Yes. The new provider loads your year-to-date totals so that W-2s and quarterly filings are correct. Switching at a quarter boundary is simpler, but mid-quarter switches are routine.

Do payroll companies charge to switch?

Gusto, OnPay and QuickBooks do not charge setup fees. Paychex and ADP may charge setup fees but commonly waive them when you are switching from a competitor. Ask.

How long does it take to set up new payroll?

Two to four weeks is typical for a business with under 50 employees. A solo owner with one employee can be live in a day on Gusto or OnPay.

More guides

• How Much Does Payroll Cost for a Small Business in 2026?
• ADP Payroll Pricing Explained (and How to Get a Lower Quote)
• Paychex Pricing Explained: Flex Essentials, Select, Pro and Enterprise
• PEO vs. Payroll Service: Which Does Your Business Need?