Payroll is the one area of small business finance where small mistakes compound quickly. Withholding is money held in trust for your employees and the government, deposit deadlines are strict, and penalties stack per return and per period. The goal of a good payroll setup is simple: everyone is paid correctly and on time, every tax is deposited and filed, and year-end forms are right the first time.
What happens behind every paycheck
- Gross pay is calculated from hours, salary, overtime, commissions, bonuses, and tips.
- Federal income tax is withheld based on each employee's Form W-4, along with state and sometimes local income tax.
- Social Security and Medicare (FICA) are withheld from the employee and matched by the employer. Social Security stops at an annual wage base; an additional Medicare tax applies to high earners.
- The employer pays federal unemployment tax (FUTA) on the first $7,000 of each employee's wages, reduced by credit for state unemployment taxes paid, plus state unemployment insurance at a rate the state assigns.
- Benefits, retirement contributions, and garnishments are deducted in the right order, pre- or post-tax.
Deposits and filings
Withheld and employer taxes are deposited electronically on a monthly or semiweekly schedule, assigned based on the size of your past payroll tax liability. Then come the returns: Form 941 every quarter reconciling federal withholding and FICA, Form 940 annually for federal unemployment, state withholding and unemployment returns on their own calendars, and W-2s and the W-3 transmittal to employees and the Social Security Administration by January 31. Contractors paid $600 or more receive Form 1099-NEC by the same date.
Taxes withheld from employees are trust fund taxes. If they are not deposited, the IRS can assess the Trust Fund Recovery Penalty against owners and anyone responsible for paying bills, personally, regardless of the business entity. This is the single biggest reason to outsource payroll.
Hiring your first employee
- 1Register for state withholding and unemployment insurance accounts before the first payday.
- 2Collect Form W-4 and Form I-9 from the new hire, plus the state withholding certificate where required.
- 3Report the hire to your state's new-hire registry, typically within 20 days.
- 4Confirm workers' compensation coverage, which most states require from the first employee.
- 5Choose a pay schedule and set up direct deposit.
Employee or contractor?
Paying someone on a 1099 does not make them a contractor. The IRS looks at behavioral control, financial control, and the nature of the relationship, and several states apply a stricter ABC test that presumes workers are employees. Misclassification leads to back payroll taxes, penalties, and interest for every open year. The contractor accounting guide covers the tests in practical terms.
Paying yourself through an S-Corp
S-Corporation owners who work in the business must pay themselves a reasonable salary through payroll before taking distributions. The salary carries payroll tax; distributions do not, which is the source of the S-Corp savings, but a salary set too low invites reclassification by the IRS. We run owner-only payroll, document how the salary was set, and coordinate it with your tax planning. The LLC versus S-Corp guide explains the trade-offs.
Tips, commissions, and multi-state teams
Tipped and commissioned staff need extra care: reported tips are wages for withholding, overtime is calculated on the regular rate including commissions, and restaurants can claim a credit for employer FICA paid on tips. Details are in the restaurant guide and the salon and retail guide. Remote employees in other states usually mean registering and withholding in those states too; we handle the registrations as soon as you hire.
The mistakes we fix most often
- Missing a deposit deadline because payroll taxes were treated as due with the quarterly return.
- Running payroll for months without registering for state withholding or unemployment accounts.
- Paying an S-Corp owner through distributions only, with no salary at all.
- Reimbursing expenses through payroll as taxable wages instead of through an accountable plan.
- W-2 totals that do not match the four quarterly Form 941s, which triggers IRS and SSA correspondence.
Year-end payroll checklist
December is when payroll errors become expensive to fix. Before the final payroll of the year we confirm employee addresses and Social Security numbers, record taxable fringe benefits such as personal use of a company vehicle or S-Corp owner health insurance, process year-end bonuses with the correct withholding, and reconcile the year's quarterly returns against payroll records. That is what allows W-2s, 1099s, and the annual unemployment return to go out on time in January without corrections afterward.
Benefits and retirement through payroll
Health insurance premiums, retirement plan deferrals, health savings account contributions, and other benefits all run through payroll, and each has its own tax treatment. Pre-tax deferrals reduce income tax withholding but not always FICA; some benefits are taxable fringe benefits that must be added to wages. When a 401(k) or SIMPLE IRA is added, deferrals need to be deposited with the plan promptly after each payroll. We configure each deduction correctly at setup so W-2 boxes and plan records match at year-end.
How payroll fits with everything else
Payroll entries flow straight into your monthly bookkeeping, so wages, employer taxes, and liabilities are recorded correctly without manual journal entries. If you have received a payroll tax notice or fallen behind on deposits, IRS resolution can address the back periods while we put a compliant process in place going forward.