How to Do Payroll for Your Small Business

Set Up Your Payroll Foundation

Doing payroll for a small business starts with three decisions: your pay schedule, your calculation method, and whether you handle taxes yourself or outsource. Most small businesses pay biweekly or semimonthly, choose between manual spreadsheets, accounting software, or a dedicated payroll service, and then register with the relevant tax authorities. Get your EIN, collect W-4s from every employee, and confirm each worker's classification — employee versus independent contractor — because that determines which forms you file and which taxes you withhold.

Calculate Wages, Deductions, and Taxes

For each pay period, gross pay is hours worked multiplied by the agreed rate, plus any overtime or bonuses. From there you subtract pre-tax deductions like health insurance and retirement contributions, then withhold federal income tax, Social Security, and Medicare based on IRS tables and the employee's W-4. You also remit state and local taxes where applicable. A payroll calculator or software automates this, but you should verify the math at least once per quarter.

Choose a Payroll Method

Small business owners typically pick one of three paths:

• Manual payroll — spreadsheets plus paper checks; lowest cost, highest error risk.
• Payroll software — tools like Gusto, QuickBooks Payroll, or ADP run calculations, file taxes, and generate payslips.
• Full-service payroll provider — a third party handles everything from direct deposit to year-end forms.

The right choice depends on your time, confidence with compliance, and how many employees you have.

Stay Compliant and On Schedule

Federal employment taxes (Form 941) are due quarterly, and year-end W-2s go to employees and the SSA by January 31. State filing deadlines vary, so mark each one in your calendar. Keep records of wages, taxes withheld, and deductions for at least four years. If you use a payroll service, confirm they file on your behalf and provide a compliance dashboard you can audit.

When to Outsource

If payroll errors are costing you more than a service fee — in penalties, employee frustration, or hours spent — hand the work to a professional. A provider removes the guesswork from tax tables, direct deposit, and year-end reporting, letting you focus on running the business rather than reconciling spreadsheets.