Your first employee starts Monday. You've sorted the offer letter, the desk, the parking spot — then it hits: how do I actually pay this person without the IRS coming after me? Learning how to run payroll for small business feels complicated before you've done it once. It isn't. You need six pieces of information, a repeatable eight-step process, and a tax calendar you'll actually use. Here it is.
- An EIN from the IRS — free, takes five minutes online
- A signed W-4 from every employee before first payday
- State tax registration — required in almost every state
- A fixed pay schedule and the 2026 federal withholding tables
- A tax remittance calendar — missing IRS deposit deadlines costs 2–15%
What You Need Before Running Payroll
Four non-negotiables. Skip any one of them and you'll be untangling a compliance problem during a pay run — the worst possible moment.
- Employer Identification Number (EIN) — Apply at IRS.gov. Free. You'll have the number the same day. Every federal payroll tax form requires it.
- Signed W-4 Employee Withholding Certificate from each employee — This dictates how much federal income tax to withhold. File the original; it never goes to the IRS.
- State tax registration — Most states require employer registration before your first payroll run. If you're in Georgia, New Jersey, California, or Colorado, state payroll rules add a separate layer beyond federal.
- A pay schedule decision — Weekly, biweekly, semi-monthly, or monthly. Biweekly wins for most small businesses: 26 pay periods a year, easy math, widely expected by employees. Pick one and hold it — inconsistency creates legal exposure in many states.
Four items. Get them done before you write a single check.
Step-by-Step: Running Your First Payroll
Marcus runs a plumbing outfit in Ohio. Two full-time techs. Before he had a system, he was hand-calculating withholding at midnight the night before payday — and still getting it wrong. Eight steps fixed that.
-
1
Collect hours or confirm salary for the pay period. Total hourly timesheets. For salaried staff, divide annual salary by pay periods — 26 for biweekly.
-
2
Calculate gross pay. Hours × rate. Add overtime at 1.5× for any hours past 40 in the week — federal law, no exceptions.
-
3
Withhold federal income tax. Pull the 2026 IRS Publication 15-T tables. Cross-reference the employee's W-4 elections. The amount shifts by filing status and pay frequency.
-
4
Deduct FICA — employee share. Social Security: 6.2% up to the 2026 wage base. Medicare: 1.45% on all wages, no cap.
-
5
Withhold state income tax. Rates and methods vary. Texas and Florida have none. Most states require their own withholding forms alongside the W-4.
-
6
Calculate employer taxes. You match the employee's 7.65% FICA — that's your added cost on top of gross wages. Budget separately for FUTA: 6% on the first $7,000 per employee, though a state credit drops the effective rate to 0.6% in most states.
-
7
Issue a pay stub and pay the employee. Direct deposit is standard; paper checks are still legal. Every employee needs a stub showing gross pay, each deduction, and net pay — required by law in most states.
-
8
Remit taxes to the IRS and your state. Most small employers use EFTPS for federal deposits. File Form 941 quarterly to reconcile. Pull up your Q4 Payroll Deadlines 2026 now and lock them into your calendar today.
Do You Need Payroll Software?
Depends on headcount. One employee and you're comfortable with spreadsheets? DIY is survivable. Four employees or more? The time-versus-penalty math shifts fast — and not in your favor.
- Calculates withholding automatically using current tables
- Generates compliant pay stubs each pay period
- Sends tax deadline reminders before penalties hit
- Files Form 941 and state returns on your behalf
- Manual math errors on withholding are common
- Miss one deposit deadline — IRS charges up to 15%
- Tables change annually; stale formulas mean underpayment
- No audit trail if the IRS ever comes knocking
The real question isn't whether you can do it manually. It's what a penalty costs versus what software costs. IRS late-deposit penalties start at 2% and climb to 15% the longer you wait. Software for under 10 employees typically runs under $50/month. The math isn't close.
See our Payroll Mistakes To Avoid guide for the specific errors that cost small employers the most — several are things software eliminates entirely. New to all of this? Small Business Payroll 101 covers the full picture.
The IRS requires most small employers to deposit payroll taxes semi-weekly or monthly — not just quarterly. Which schedule applies to you depends on your total tax liability from the prior lookback period. Getting this wrong is the single most common first-year payroll mistake.
2026 Payroll Tax Deadlines to Know
Put these in your calendar before you run your first payroll. Retroactive urgency is expensive.
| Form / Filing | What It Covers | 2026/2027 Deadline |
|---|---|---|
| Form 941 | Quarterly payroll tax reconciliation | Q4 2026 → Jan 31, 2027 |
| W-2 (to employees + SSA) | Annual wage and tax statement | Jan 31, 2027 |
| Form 940 | Annual FUTA (federal unemployment) return | Jan 31, 2027 |
State deadlines are a different story. If you're in Illinois, Ohio, or Pennsylvania, your state's employer tax portal has its own quarterly deposit schedule — it won't align neatly with the federal calendar. Bookmark the full W-2 Preparation Checklist 2026 and W-2 Filing Deadline 2026 guides before year-end.
Payroll records must reflect real wages actually paid. Falsifying payroll records or income documents is a federal crime — and the IRS cross-references your filings against what employees report on their own returns.
Miss a federal deposit deadline and the IRS charges 2–15% in penalties — on top of what you still owe. Set calendar reminders the day you hire employee #1. The eight-step process isn't complicated. Ignoring the calendar is simply expensive.
Frequently Asked Questions
How much does it cost to run payroll for a small business?
DIY costs nothing upfront but carries real penalty risk if you miscalculate. Payroll software for 1–10 employees runs roughly $20–$80/month depending on the provider. That covers automated tax calculations, pay stub generation, and deadline reminders — worth every dollar once you hit three employees.
Can I run payroll myself without an accountant?
Yes — most micro-business owners do. You need an EIN, employee W-4s, the IRS withholding tables, and a reliable deposit calendar. An accountant earns their fee during setup and year-end filings. Routine payroll processing doesn't require one, provided you're using solid software.
How often should a small business run payroll?
Biweekly — every two weeks — is the most common choice. It balances admin load against employee expectations. Some states mandate a minimum pay frequency, so check your state's labor law before locking in a schedule. Weekly suits hourly workers well; monthly is rare and often legally restricted.
Stop calculating payroll by hand.
PayHRoll handles withholding, pay stubs, and deadlines automatically — built specifically for small businesses with 1–10 employees.
Try PayHRoll Free — Built for Small Business →Bottom Line
Small business payroll isn't complicated — it's a checklist problem. Get your EIN, classify workers correctly, withhold the right amounts, hit every deposit deadline, and file on time. Miss any one step and the IRS charges you for it automatically.
The businesses that struggle aren't the ones with complex payroll. They're the ones treating it as an afterthought. Build the habit early, use software that handles the math, and payroll stays a 30-minute task instead of a quarterly crisis.