Payroll is one of the most compliance-dense functions a business operates — and one where mistakes are expensive, recurring, and often discovered long after the fact. The questions below cover everything a business owner needs to get payroll right from day one: how to set it up, what taxes to withhold, how to classify workers correctly, and what the common mistakes look like before they become IRS notices.
For related topics see Human Resources FAQs, Finance FAQs, and the full Startup FAQs hub. The answers here are educational overviews — consult a CPA or employment attorney for guidance specific to your state and situation.
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Getting Started with Payroll
When does a startup need to set up payroll?
The moment you pay yourself or anyone else a W-2 salary — which means before the first paycheck. Payroll requires an EIN (obtained when you form your entity), registration with your state’s employment agency, and a payroll system that calculates and remits taxes automatically.
Running payroll without proper setup creates back-tax liabilities, penalties, and employee relations problems. Set it up before you need it, not the week you are ready to make your first hire. The IRS does not offer grace periods for missed deposit deadlines caused by late setup.
What do I need to set up payroll for the first time?
You need: an EIN from the IRS, a dedicated business bank account to fund payroll runs, state employer registration in every state where employees will work, completed W-4s and state withholding forms from each employee, direct deposit authorization forms, and an active payroll software account.
If you are offering benefits, connect your benefits provider to the payroll system so deductions are calculated automatically. Most payroll software walks you through setup in under an hour if you have all of these documents ready in advance. Register in your state before processing the first paycheck — state registration can take 1–4 weeks depending on the state.
What payroll software is best for startups?
Gusto is the most popular choice for early-stage startups — it handles federal and state tax filings automatically, integrates with accounting software like QuickBooks and Xero, and supports benefits administration. Rippling is a stronger option for scaling companies (10+ employees) that want HR, IT, and payroll in one unified system.
ADP and Paychex are legacy providers that handle compliance well but have more friction for small teams. Avoid manual payroll at any stage — the compliance complexity is too high and the error risk is too consequential. The cost of payroll software ($40–$150/month for early-stage) is a small fraction of the cost of a single payroll tax penalty.
How often should a startup run payroll?
Most startups run payroll bi-weekly (every two weeks, 26 pay periods per year) or semi-monthly (twice a month, 24 pay periods). Bi-weekly is common for hourly workers because it aligns with workweek schedules and simplifies overtime calculations. Semi-monthly aligns with month-end close, which simplifies accounting and accruals.
Some states have minimum pay frequency requirements — California requires semimonthly pay for most employees; other states require weekly. Check your state’s requirements before setting a payroll schedule. Your payroll software manages the schedule automatically; the key is picking a frequency that satisfies your state’s rules and maintaining it consistently.
Payroll Taxes & Compliance
What payroll taxes does a startup need to withhold and remit?
For each W-2 employee: federal income tax (withheld from employee pay based on their W-4 elections), Social Security (6.2% employee + 6.2% employer, on wages up to the annual wage base), Medicare (1.45% employee + 1.45% employer, no wage cap), and state income tax (varies by state — nine states have no income tax).
The employer-side Social Security and Medicare taxes — collectively 7.65% of wages — come out of the company’s budget on top of salary. Most first-time founders underestimate this when modeling headcount costs. Federal unemployment (FUTA) and state unemployment (SUTA) are additional employer-only obligations that apply on top of the FICA match.
When must payroll tax deposits be made to the IRS?
Employers deposit federal payroll taxes (withheld income tax plus FICA) on either a monthly or semi-weekly schedule based on total tax liability from the prior lookback period. New employers are monthly depositors by default. Missing deposit deadlines triggers penalties of 2–15% of the unpaid amount, scaling with how many days the deposit is late.
Your payroll software should handle automatic deposits — but confirm it is actually remitting funds rather than just processing payroll. The IRS issues Form 941 quarterly to reconcile deposits against actual tax liability. Do not ignore 941 deadlines; they are separate from the deposit schedule and carry their own penalties for late filing.
What is FUTA and how does federal unemployment tax work?
FUTA (Federal Unemployment Tax Act) is an employer-only payroll tax of 6% on the first $7,000 of each employee’s wages per year. Employers who pay state unemployment taxes (SUTA) on time receive a credit of up to 5.4%, reducing the effective FUTA rate to just 0.6% — a maximum of $42 per employee per year.
FUTA is reported annually on Form 940 and deposited quarterly if accumulated liability exceeds $500. SUTA rates vary by state and are experience-rated — your rate increases if you have high unemployment claims from former employees. Managing terminations carefully and contesting unwarranted claims can keep SUTA rates lower over time.
What payroll tax forms does a startup need to file?
Key federal payroll tax forms: Form 941 (quarterly federal tax return — filed 4 times per year to report withheld income tax and FICA deposits), Form 940 (annual FUTA return), Form W-2 (wage and tax statement sent to each employee and the SSA by January 31), and Form 1099-NEC (filed for each contractor paid $600 or more in a calendar year, also due by January 31).
State requirements add additional filing obligations that vary by state. Most payroll software files 941s and W-2s automatically — but you remain legally responsible for their accuracy regardless of whether software handles the submission. Review every quarterly and annual filing before it is submitted.
What is a Form W-2 and when do I need to send it?
Form W-2 is the annual Wage and Tax Statement showing each employee’s total wages paid and taxes withheld during the calendar year. You must deliver W-2s to employees and submit copies to the Social Security Administration (SSA) by January 31 of the following year.
Employees use their W-2 to file their personal income tax return. If an employee does not receive their W-2 by early February, you are responsible for reissuing it. Penalties for late or incorrect W-2s start at $60 per form and increase with the length of delay — intentional disregard can trigger penalties of $630+ per form. Keep employee addresses current to avoid delivery failures.
Worker Classification
What is the difference between a W-2 employee and a 1099 contractor?
A W-2 employee has federal and state income taxes withheld, is eligible for employer-provided benefits, and works under the employer’s direction and control — including what work is done, when, and how. A 1099 contractor is self-employed, sets their own schedule and methods, provides their own tools, and is responsible for paying their own taxes (including self-employment tax of 15.3% on net earnings).
The IRS uses a behavioral, financial, and type-of-relationship test to determine classification. If you control what work is done and how it is done, that person is very likely an employee — regardless of what the contract says. The label you give someone does not override the reality of how you work with them.
What are the penalties for misclassifying an employee as a contractor?
Significant. The IRS can assess back payroll taxes for both the employee and employer share, plus penalties of 1.5–3% of wages, 20–40% of the employee’s FICA taxes that were not withheld, and interest on all unpaid amounts. State penalties stack on top of federal and vary widely.
The risk compounds with every year the misclassification continues, and every misclassified worker multiplies the total exposure. If you are uncertain, use IRS Form SS-8 to request a formal determination before making the first payment — or reclassify proactively. The cost of voluntary reclassification is almost always far less than the cost of discovery through an audit.
What is the IRS right-to-control test for worker classification?
The IRS evaluates three categories: Behavioral control — does the company control what the worker does and how they do it (training, instructions, evaluation)? Financial control — does the company control the business aspects of the work (tools, investment, profit/loss risk, working for multiple clients)? Type of relationship — is there a written contract, are there employee-type benefits, is the relationship indefinite?
No single factor is determinative — it is a totality-of-circumstances assessment. The greater the behavioral and financial control, the more likely the worker is an employee. A contractor who works exclusively for one company, on-site, using company equipment, under close supervision, is almost certainly an employee by any reasonable analysis.
Can I pay a 1099 contractor more than a W-2 employee doing similar work?
Yes, and it is common. Contractors typically receive higher hourly or project rates than employees doing similar work for two reasons: they pay self-employment tax (15.3% on net earnings) themselves and receive no employer-paid benefits. A contractor billing $80/hour is not comparable in cost to an employee at $80/hour.
When comparing contractor versus employee costs, model the fully burdened cost of employment: base salary plus employer FICA (7.65%), FUTA/SUTA, workers’ comp, health insurance, 401(k) match, and recruiting/onboarding costs. That fully loaded cost is typically 1.25–1.4x base salary. Run the math before assuming a contractor is more expensive than an employee.
Payroll Costs & Pay Basics
What is the true cost of an employee beyond their base salary?
The fully burdened cost of an employee is typically 1.25–1.4x their base salary. On top of wages, employers pay: employer-side FICA (7.65%), FUTA (up to 0.6%), SUTA (varies by state and claims history), workers’ compensation insurance, health insurance premiums (if offered), 401(k) match (if offered), and indirect costs like recruiting fees, onboarding time, equipment, and software licenses.
A $100,000 salary employee may cost $125,000–$140,000 all-in. Model the fully loaded cost before every hire — salary is the floor, not the ceiling. This math is especially important when forecasting runway and headcount in financial models for investors or lenders.
What is the difference between gross pay and net pay?
Gross pay is total compensation before any deductions — the stated salary or hours worked times hourly rate. Net pay is what the employee actually receives after all deductions: federal and state income tax withholding, employee-side Social Security and Medicare (7.65% FICA), pre-tax benefit deductions (health insurance, 401(k) contributions, FSA), and any post-tax deductions (garnishments, Roth 401(k), supplemental insurance).
The gap between gross and net can be substantial. A $6,000 monthly gross salary employee might net $4,200–$4,600 after taxes and benefit deductions depending on filing status and elections. New employees sometimes confuse offer-letter salary with take-home pay — setting expectations clearly at the offer stage prevents onboarding friction.
What is a pay stub and what information must it include?
A pay stub is a record provided to employees with each paycheck detailing their earnings and deductions for that pay period. Most states legally require employers to provide pay stubs. A compliant pay stub includes: pay period dates, gross earnings, all deductions itemized (federal tax, state tax, Social Security, Medicare, benefit deductions), year-to-date totals for earnings and deductions, and net pay.
Even in states without a mandate, providing pay stubs is best practice — it reduces payroll disputes, gives employees documentation for loan applications and benefit verification, and creates a paper trail that protects the employer if an employee later disputes their compensation. Your payroll software generates pay stubs automatically for every payroll run.
How do I handle payroll for employees in multiple states?
When an employee works in a state different from your company’s home state, you must typically: register as an employer in that state, withhold that state’s income tax, pay SUTA at that state’s rate, and comply with that state’s wage and hour laws — including minimum wage, overtime rules, and required pay frequency. Remote employees create nexus in their state, which may also trigger corporate income or franchise tax registration.
Multi-state payroll is one of the fastest-growing compliance challenges for remote-first companies. Gusto and Rippling both support multi-state payroll, but you must register in each state before running payroll there — retroactive registration after undiscovered non-compliance is more complex and sometimes triggers penalties. Identify every state where employees work before your first payroll run.
Special Situations
How do I pay myself as a startup founder?
How you pay yourself depends on your entity type. C-Corp founders pay themselves a W-2 salary and must run payroll like any other employee. S-Corp owners who work in the business must pay themselves a “reasonable salary” via W-2 before taking distributions — skipping the salary to avoid payroll taxes is a top IRS audit trigger. LLC members can take owner’s draws without payroll but still owe self-employment tax on net business income.
For VC-backed C-Corps, founders typically take a modest salary in early stages — often $75,000–$150,000 — to preserve cash and demonstrate commitment. Consult a CPA to structure founder compensation correctly for your entity type and funding stage before the first payment, not after.
How does overtime pay work?
Under the Fair Labor Standards Act (FLSA), non-exempt employees must be paid at least 1.5x their regular rate for all hours worked over 40 in a single workweek. Overtime is calculated weekly — hours cannot be averaged across multiple weeks to avoid the obligation. Some states impose daily overtime requirements on top of the federal weekly threshold: California, for example, requires overtime pay after 8 hours in a single day.
Overtime rules apply only to non-exempt employees — salaried exempt employees are not entitled to overtime regardless of hours worked, provided they meet the FLSA salary threshold ($684/week as of 2024) and duties tests. Misclassifying a non-exempt employee as exempt to avoid overtime liability creates retroactive wage obligations that compound over time.
What is a wage garnishment and how do I handle one?
A wage garnishment is a court or agency order requiring you to withhold a portion of an employee’s wages and remit it directly to a creditor — most commonly for child support, student loans, tax debts, or consumer debt judgments. When you receive a valid garnishment order, you are legally required to comply and cannot terminate the employee solely because of it (federal law prohibits termination for a single garnishment).
The Consumer Credit Protection Act limits how much can be garnished: generally 25% of disposable earnings or the amount by which weekly disposable earnings exceed 30 times the federal minimum wage, whichever is less. Child support garnishments have higher limits (up to 60–65%). Enter the garnishment order details in your payroll software — most platforms calculate the correct withholding automatically.
What are the most common payroll mistakes startups make?
The most consequential mistakes: misclassifying employees as contractors (back taxes, penalties, and interest that compound annually); missing payroll tax deposit deadlines (IRS penalties of 2–15%); not registering in states where remote employees work (multi-state tax and labor law violations); failing to file Form 941 quarterly even when deposits are current; and ignoring state-specific wage and hour rules (minimum wage floors, overtime thresholds, required pay stub formats).
The common thread: payroll compliance is a system problem, not a math problem. Use reputable payroll software, configure it correctly at setup, confirm it is auto-filing and auto-depositing, and review every 941 and W-2 before the deadline. Cash Flow Optimizer integrates with your payroll system to give you real-time visibility into payroll costs against your overall cash flow — so headcount decisions are always made with current financial data.