How payroll works, start to finish

The short answer: what payroll “does”

Payroll turns your business hours and pay rates into employee paychecks (direct deposit or checks), while also handling taxes and required filings.

In most US small businesses, payroll includes: (1) tracking time/hours (if needed), (2) calculating gross pay and deductions, (3) withholding employee taxes, (4) paying employees, and (5) preparing and filing payroll tax forms and year-end forms.

RunWise Pay is a FREE matching service, not a payroll provider. We help you connect with payroll service providers that can run the pay process for you—so you can choose what fits your team and budget.

1) Set up your pay basics (the inputs)

Before any pay date, payroll needs your basic information: who you pay, how you pay them, and how often.

Common setup items include:
- Employees vs. contractors (W-2 vs. 1099).
- Pay schedules (weekly, biweekly, semimonthly, or monthly).
- Pay rates and any recurring pay rules (overtime, bonuses, commissions, tips).
- Benefit deductions (if applicable) and reimbursement rules.
- The state where employees work (state tax rules can differ).

If you’re new to the US payroll system, don’t worry—this is usually the easiest part to “get organized.” The important part is accuracy: your payroll provider will need correct pay rates, pay frequency, and employee classification details. Confirm what they ask for and what they do with it before you start.

2) The pay period: time in, payroll calculations

A pay period is the date range you pay for (for example, the 1st–15th of the month). Your payroll calculations usually happen at the end of each pay period.

Here’s the typical flow:
1. Hours are collected (if you track time) or hours are entered.
2. Gross pay is calculated based on your pay rules.
3. Deductions are applied (for example, benefit deductions).
4. Taxes are withheld from the employee’s pay based on payroll tax rules and employee withholding elections (those details come from your onboarding paperwork).

Your payroll service provider then performs the payroll calculations and checks for common issues like missing time, incorrect pay rates, or inconsistent classification. Ask providers how they handle corrections if something changes mid-cycle.

3) Gross-to-net pay: what employees actually receive

Employees see the result as “net pay”—what lands in their bank account after withholdings.

In plain terms, net pay is usually:
- Gross pay (salary or hourly wages)
- Minus employee withholdings (federal income tax, and often Social Security/Medicare and state income tax, depending on the situation)
- Minus other deductions (like certain benefits)
= Net pay

Important: payroll can look simple on the surface, but the math depends on current payroll rules. For example, overtime and tax withholding can differ by worker type and state. A good payroll provider will help you apply the correct rules and will explain what changed when you compare pay stubs across periods.

4) Employer taxes, deposits, and filings: the part many owners don’t see

Running payroll isn’t just paying employees. Businesses also typically owe employer-side payroll taxes and must file payroll reports on schedules set by federal and state agencies.

A payroll provider often handles tasks like:
- Calculating employer taxes that go with each pay run
- Submitting required deposits (timing can vary by amounts and your setup)
- Preparing payroll tax filings during the year
- Producing year-end forms like W-2s for employees and 1099s for contractors (rules differ by situation)

Because deadlines and requirements vary by state and can change, treat this as general guidance. You should confirm specifics with the payroll provider and, when needed, an accountant or tax professional. Also, check that the provider clearly states the filing responsibilities they cover and how they report results to you.

5) Year-end W-2/1099 and recordkeeping

At year-end, payroll shifts from pay runs to reporting and forms. This is when you’ll see the results of every pay period compiled into tax documents.

A typical provider workflow includes:
- Generating employee W-2 forms (generally for wages paid to employees)
- Generating contractor 1099 forms (generally for payments to certain non-employees, depending on the rules)
- Delivering forms to employees/contractors and providing copies for the business records
- Supporting updates if information needs correction

If something goes wrong—wrong hours, wrong rates, late changes—how the provider handles corrections matters. Before you sign, ask how they will fix and reissue forms if there’s an error, and what the timing looks like.

Where a payroll provider takes over—and what to watch for

When you outsource payroll, the provider typically does the calculations, runs the pay run, and handles tax filing steps. You still stay in control of the decisions: you provide accurate inputs, review pay results, and approve what goes out.

Common pricing structures you might see (not quotes):
- A monthly base fee (often roughly $30–$80+/month for small teams)
- Plus a per-employee/per-pay-period component (often roughly $2–$10+ per employee per pay run, depending on frequency and what’s included)

Your real cost depends on team size, pay frequency, state complexity, and features (for example, time tracking, benefits, or contractor management). These are ranges, not guarantees.

Payroll red flags to avoid:
- Vague pricing (“contact us” without showing what’s included)
- Hidden fees (for filings, corrections, onboarding, or support)
- No clear tax-filing responsibility or no explanation of what they do vs. what you do
- Poor support or slow response times
- Pressure to sign quickly

Before you hire, confirm what’s included in writing: which forms they file, what happens if information changes, how you approve pay runs, turnaround times, and which deadlines they monitor.

Get matched (free) and compare providers safely

RunWise Pay is a FREE matching service that helps connect small and mid-size US businesses with payroll service providers that fit your situation. To get started, you’ll share contact + business intent—like your business name, state, how many people you pay, and your preferred language.

We do NOT request or collect employee SSNs, EINs, bank account numbers, or other sensitive employee records. You stay in control of your data.

If you want to compare options, use a simple checklist during calls:
1. Ask about pay run frequency and how the provider handles it.
2. Ask what filings they do and what form types they cover (W-2/1099, plus payroll tax reports).
3. Ask for the full pricing structure and what triggers extra charges.
4. Ask how errors and corrections are handled, including timing.
5. Confirm support hours and the approval process for each pay run.

Then review everything in writing, and choose the provider you feel comfortable with. If you’re switching providers, ask for the migration plan and how they handle historical year-end reporting.