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Guide

How to Run Payroll for a Small Business: A Practical Guide

A clear, step by step walk through of running payroll for a small business, from setting up employees and pay schedules to filing taxes on time.

8 min readUpdated 2026-09-22
Small business owner reviewing payroll on a laptop at a desk

The first payroll run is one of the moments a small business genuinely feels like a business. It also comes with the highest concentration of new decisions: pay schedules, tax withholding, direct deposit, benefit deductions, and the reports that follow.

This guide walks through the whole process so an owner or bookkeeper can set payroll up correctly the first time and repeat it every period with confidence.

What You Need Before You Run Payroll

Payroll depends on a short list of records that have to be in place before you can pay anyone. Missing any one of them turns a routine run into an incident: a bounced deposit, a wrong tax filing, or a paystub that has to be reissued.

  • A federal Employer Identification Number (EIN) from the IRS
  • State tax accounts for every state where you have an employee
  • A completed W-4 and I-9 from every employee
  • Direct deposit authorizations (or a plan for printed checks)
  • A pay schedule (weekly, biweekly, semi-monthly, or monthly) chosen deliberately, not by accident

Choosing a Pay Schedule and Sticking to It

Pay schedule is more than a preference. Most states set a minimum frequency (biweekly or semi-monthly is common), and once employees have a rhythm, changing it is a real disruption. Weekly is the most cash-flow-intensive; monthly is the least, but is not allowed for hourly workers in several states.

Pick a schedule you can honor without exception. Late paychecks are one of the fastest ways to lose trust with a team, and in many states they carry statutory penalties.

The Actual Payroll Run, Step by Step

A full payroll cycle has the same shape every time. Collect hours for hourly employees, apply salaries for salaried employees, calculate gross pay, calculate federal, state, and FICA withholdings, apply pre-tax and post-tax deductions, arrive at net pay, and issue direct deposits or checks.

Underneath that shape sits the tax math, which is where most manual payroll runs go wrong. Every deposit has to match the tax tables in force for the current year, in the states involved, at the filing status the employee claimed on their W-4.

Filing Payroll Taxes on Time

Every payroll run generates tax liabilities that have to be deposited on a schedule the IRS sets based on your business size, plus state deposits on their own schedule. Miss a deadline and penalties accrue quickly, even when the underlying amounts are small.

Quarterly federal Form 941 and annual Form 940 are the two returns most small businesses file directly. States have their own equivalents. Year end brings W-2s to employees and 1099-NECs to contractors, both due by January 31.

Common Mistakes First Time Payroll Runners Make

The most common early mistakes are avoidable once you know to look for them:

  • Classifying a worker as a contractor when the working relationship is really an employee relationship
  • Forgetting to withhold state unemployment insurance in every state where an employee works
  • Paying yourself as an owner in the same run as employees without a plan for how it flows through to the books
  • Skipping the year to date fields on the paystub, which employees rely on for their own tax planning

When to Automate the Process

Manual payroll is possible for a very small team but scales badly. Once you are running payroll for more than a handful of people, the risk of a math mistake or a missed deposit outweighs the perceived savings of doing it by hand. Payroll software calculates taxes for you, files the returns on time, and generates the paystubs and year-end forms as a byproduct of the run.

Key Takeaways

  • Register federal and state tax accounts before the first payroll run, not after.
  • Pick a pay schedule you can honor without exception, and check state minimums first.
  • The tax math is the risky part of a manual run; every dollar has to match the tables in force for the current year.
  • Automating payroll pays for itself as soon as the team grows past a handful of people.

Frequently Asked Questions

Do I need an EIN even if I only have one employee?

Yes. Any business with at least one employee has to have an EIN, and every payroll tax filing references it. Applying is free and takes a few minutes on the IRS website.

How often do I have to deposit federal payroll taxes?

Most small businesses deposit monthly based on the IRS lookback period, but some deposit semi-weekly. The IRS assigns your schedule in writing; if in doubt, follow the notice you were sent.

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How to Run Payroll for a Small Business: Step by Step | Swift Paybooks