How to Set Up Payroll for a Small Business from Scratch (2026 Guide)

That Mix of Excitement and Mild Panic

There is a specific moment many small business owners remember clearly: the day you make your first hire, and the realization sets in that you are now legally responsible for someone else's paycheck, tax withholdings, and compliance—not just your own. Setting up payroll for the first time can feel overwhelming, but it follows a genuinely structured sequence. Most businesses complete the entire setup process in 4 to 6 hours of active work, spread across 1 to 2 weeks—and importantly, most of that elapsed time is spent waiting on state registrations and bank account verifications, not doing hands-on setup work.

Step 1: Get Your EIN – The Foundation of Everything Else

Your Employer Identification Number (EIN) is your business's federal tax ID—functionally, the business equivalent of a Social Security Number. You cannot pay employees, open certain business bank accounts, or file payroll taxes without one. Getting an EIN is completely free and takes about 10-15 minutes online directly through IRS.gov—never pay a third-party service for this. If you apply online during business hours (Monday-Friday, 7am-10pm Eastern), you typically receive your EIN immediately upon completing the form. Have your business's legal name, address, and entity structure ready before starting, and store your EIN confirmation letter somewhere secure—you will need to reference it constantly going forward. Important for sole proprietors: even if you have been using your personal Social Security Number for business taxes, get an EIN before hiring your first employee. Using your SSN for payroll tax filings exposes it unnecessarily and creates real complications later if your business structure changes.

Step 2: Register for State and Local Tax IDs

Beyond your federal EIN, most states require two additional registrations: A state income tax withholding ID, if your state collects state income tax. A State Unemployment Insurance (SUTA) account. Your new employer SUTA rate varies by state, with most states placing first-time employers in a baseline rate range that adjusts after a year or two of actual payroll history. Processing times for these state registrations vary—some states issue IDs immediately online, while others take one to two weeks. This waiting period is exactly why the overall setup timeline runs 1-2 weeks even though the active work involved is much shorter. While you are registering with your state agency, check whether your business size and industry also require workers' compensation insurance.

Step 3: Classify Every Worker Correctly Before Anything Else

Before collecting paperwork or running your first payroll, confirm whether each person you are paying is genuinely an employee or an independent contractor—and if an employee, whether they are exempt or non-exempt under Department of Labor overtime rules. This classification decision shapes every subsequent step: employees need W-4s and ongoing withholding; contractors need a W-9 and no withholding at all. Getting this wrong is not a minor paperwork issue—misclassifying a worker can mean owing back payroll taxes, penalties, and interest once discovered, sometimes well after the relationship has ended.

Step 4: Collect Required New-Hire Paperwork

Before anyone's first paycheck, gather: Form W-4—determines federal income tax withholding based on filing status and other adjustments; if an employee does not submit one, you must withhold as if they were single with no other entries. Form I-9—verifies work eligibility in the US. State withholding certificate, where applicable. Direct deposit authorization and banking details. Basic personal information: legal name, address, Social Security Number, and pay rate. For independent contractors, the paperwork burden is considerably lighter: collect a completed Form W-9, which provides their taxpayer ID for the eventual 1099 filing. You do not withhold any taxes from contractor payments at all—that is the core practical distinction driving the classification decision in Step 3.

Step 5: Choose Your Pay Schedule – And Choose It Deliberately

Common pay frequencies include: Weekly—52 pay periods/year. Biweekly—26 pay periods/year, paid every two weeks. Semimonthly—24 pay periods/year, typically on fixed dates like the 15th and last day of the month; this aligns cleanly with calendar months for benefits deductions, making it a common choice for salaried-only payrolls. Monthly—12 pay periods/year. Some states mandate specific pay frequencies for certain worker categories (hourly workers, for example), so check your state's labor agency before finalizing this choice. This decision matters more than it might first appear: changing pay schedules later resets your tax deposit timing, requires reconfiguring payroll software, and disrupts employee expectations all at once. Make this decision once, deliberately, rather than adjusting it casually down the road.

Conclusion: Set Up Payroll Right from Day One

Payroll setup is genuinely manageable independently for a single employee or a small team with straightforward circumstances. Consider professional support if you are hiring across multiple states or countries, if your team includes a mix of employees and contractors and you want classification reviewed before you start, or if you would simply rather hand off the ongoing tax filing and compliance burden so you can focus on running the business itself.

If you would like help setting up payroll correctly from the start, or want an experienced team handling your ongoing payroll compliance, our team at CA-Sir works with small businesses across the US, Canada, and Australia on payroll setup and processing year-round. Contact us today to book a consultation.