How to Do Payroll for Small Business

How to Do Payroll for Small Business: A 10 Step Guide

What Running Payroll Actually Requires
Why Setup Decides Everything That Follows
How the Annual Cycle Repeats
10 Steps to Run Payroll for a Small Business
Case Study: A Raleigh Studio’s First Year of In-House Payroll
Frequently Asked Questions

Introduction

How to do payroll for small business divides cleanly into setup and routine. Setup takes a few hours once and determines whether the routine works. Most problems trace back to a step skipped at the beginning.

The routine itself is manageable. Software calculates withholdings accurately and files on schedule if configured correctly. The judgement calls are in classification, registration and knowing when something has changed.

This guide covers the ten steps in order, which ones are one-off and which repeat, and where small employers most often get caught.

1. What Running Payroll Actually Requires

Running payroll requires an employer identification number, registration in every state where work is performed, a current W-4 for each employee, and a deposit schedule you know and follow.

It also requires knowing which workers are employees and which are contractors, because that single determination changes every obligation downstream.

Requirement	One-off or ongoing	Where it applies
Federal EIN	One-off	Federal
State withholding registration	One-off per state	Each state with workers
State unemployment registration	One-off per state	Each state with workers
W-4 from each employee	On hire, updated as needed	Federal
New hire reporting	Within days of each hire	State
Workers compensation	Ongoing policy	Most states

2. Why Setup Decides Everything That Follows

A business registered in one state that hires someone living in another has created an obligation the moment that person starts work, not at the end of the quarter when someone notices.

Payroll for remote teams has made this routine rather than exceptional. A single remote hire typically triggers withholding registration, unemployment registration and new hire reporting in a state the business has never operated in.

The Department of Labor wage and hour division also sets requirements that vary by state, particularly around overtime calculation and pay statement contents.

Registration precedes the first pay run, not the first filing deadline
One remote hire creates a full set of obligations in their state
Worker classification determines every obligation downstream
New hire reporting has short deadlines that are easy to miss entirely

3. How the Annual Cycle Repeats

Once set up, payroll follows a predictable calendar, and what is payroll processing becomes a repeating sequence rather than a decision. Pay runs on your frequency, deposits on your assigned schedule, returns quarterly, forms annually.

What is payroll processing in practice is this calendar, executed without gaps. The skill is in noticing when something changes rather than in the routine itself.

Each pay period: run payroll, issue statements, deposit taxes
Monthly: reconcile payroll to the ledger
Quarterly: file Form 941 and state unemployment returns
Annually: file Form 940, issue W-2 and 1099-NEC forms
On change: new state, new deposit schedule, rate update

4. 10 Steps to Run Payroll for a Small Business

Steps one to five are setup and happen once per state. Steps six to ten repeat every cycle.

Step 1: Obtain a Federal EIN

Free, immediate online, and required before anything else. The EIN identifies the business on every federal payroll filing and cannot be substituted with a personal identifier.

Step 2: Register in Every State Where Work Happens

Withholding and unemployment registration are separate processes in most states. Register before the first pay run rather than before the first filing deadline, because the obligation starts at the first dollar.

Step 3: Classify Every Worker Correctly

Employee or contractor, decided on control and relationship rather than on preference or on what the worker asks for. Misclassification carries back wages, penalties and unpaid employment tax together.

Step 4: Collect W-4 and I-9 Forms

A current W-4 determines withholding and an I-9 verifies work authorisation. Both are required at hire, and the I-9 has strict timing requirements measured in days.

Step 5: Choose and Configure Payroll Software

Gusto, Rippling, ADP and others all handle US payroll well. Configure the deposit schedule, state registrations and pay frequency carefully, because errors here repeat silently every cycle.

Step 6: Run the Cycle and Review Before Release

Compare each run against the last. Anything that moved unexpectedly gets investigated before payment rather than after. Two minutes of review prevents most errors that reach employees.

Step 7: Deposit Taxes on Schedule

Semi-weekly or monthly federally, varying by state. Treat the deposit as part of the run, not as a follow-up task. Payroll compliance services exist largely because this step carries the heaviest penalties.

Step 8: Report New Hires

Each state requires new hire reporting within a short window, typically twenty days. It is quick, it is easy to forget, and penalties apply per unreported hire.

Step 9: File Quarterly Returns

Form 941 federally plus state unemployment returns. These must reconcile to your ledger, so a monthly payroll reconciliation makes quarterly filing a review rather than an investigation.

Step 10: Issue Year End Forms

W-2 for employees and 1099-NEC for contractors, due to recipients in late January. Collect W-9 forms from contractors during the year rather than chasing them in January.

Knowing how to do payroll for small business properly means treating January as a deadline you prepared for in November.

5. Case Study: A Raleigh Studio’s First Year of In-House Payroll

What a Single Remote Hire Changed

A design studio in Raleigh had six employees, all in North Carolina, and ran payroll in-house without difficulty for two years. The setup was correct and the routine held.

Then they hired a developer living in Colorado. Nobody registered in Colorado, nobody reported the hire, and state tax was withheld at North Carolina rates for five months.

Issue	Consequence	Resolution cost
No Colorado withholding registration	Back taxes plus penalty	$3,900
No Colorado unemployment registration	Back contributions	$1,850
New hire not reported	Per-hire penalty	$250
Wrong state tax withheld	Employee amended return	$600 in fees
Corrected W-2 required	Reissue and refile	$400
Total	–	$7,000

The developer was a good hire and the studio was a competent employer. The entire cost came from not knowing that a remote hire creates obligations in the employee’s state from day one rather than at the quarter end.

6. Frequently Asked Questions

1. How do I run payroll for a small business?

Obtain a federal EIN, register for withholding and unemployment in every state where staff work, classify workers correctly, collect W-4 and I-9 forms, configure payroll software, then run each cycle, deposit taxes on schedule and file quarterly returns.

2. Do I need to register in another state for one remote employee?

Generally yes. Payroll for remote teams means an employee working in another state typically creates withholding registration, unemployment registration and new hire reporting obligations there, from the first pay run rather than the first filing deadline.

3. What payroll software should a small business use?

Gusto, Rippling and ADP all handle US small business payroll including multi-state. Choose on whether your states are supported, how registration is handled, and whether your accountant already works in that platform.

4. How much does payroll cost for a small business?

Software typically runs $40 to $80 a month plus $6 to $12 per employee. Payroll compliance services covering filings, registrations and reconciliation generally add $200 to $600 a month depending on headcount and state count.

5. What happens if I classify a contractor incorrectly?

Reclassification brings back wages, unpaid employment taxes, penalties and interest together. Several states apply stricter tests than the federal standard, so a classification valid federally may still fail at state level.

6. When are payroll tax returns due?

Form 941 is due by the last day of the month following each quarter end. Form 940 is annual. W-2 and 1099-NEC forms must reach recipients in late January. State unemployment returns follow their own quarterly schedule.

Conclusion

Payroll for a small business is manageable in-house provided the setup is right and someone watches for changes. The failures are almost never in the arithmetic.

Explore our payroll services, read what payroll processing involves, or our payroll compliance checklist. Multi-state employers should also see how remote hires change the position.

Ask us to review your registrations.

About the Author

Saloni Modi | Senior Accountant, Finkeepers
Qualified accountant with over a decade advising US small businesses on payroll setup and multi-state compliance. Wage and hour guidance referenced here is published by the US Department of Labor.

Disclaimer

This article provides general payroll guidance for educational purposes only. Registration requirements, rates and deadlines vary by state and change. Always consult a qualified CPA or payroll professional before acting on this content. Last updated October 2026.

How to Do Payroll for Small Business