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When you hire your first employee, payroll goes from a simple concept to a surprisingly complex set of federal obligations. You’re suddenly responsible for calculating withholding, matching certain taxes, depositing funds to the IRS on a schedule, and filing returns quarterly and annually. Miss a step and the penalties start immediately.
None of this is actually that complicated once you understand the structure. Here’s the plain-language breakdown of what small business owners are required to do — and what happens when you get it wrong.
The Two Categories: Employer Taxes vs. Employee Taxes
Payroll taxes fall into two buckets. Some come out of the employee’s paycheck — you withhold them and remit them on the employee’s behalf. Others are paid by the employer directly, on top of wages. Understanding which is which is the foundation of getting payroll taxes right.
Federal income tax: Withheld from employee pay based on their W-4 elections and the IRS withholding tables. You don’t pay this — you collect it and send it to the IRS on a deposit schedule. The amount varies by employee based on filing status, allowances, and additional withholding they’ve requested.
Social Security tax (OASDI): 6.2% withheld from the employee’s wages, up to the annual wage base ($176,100 for 2025; adjusted annually by the SSA). You also pay a matching 6.2% as the employer. Total: 12.4% on wages up to the wage base.
Medicare tax (HI): 1.45% withheld from the employee, plus a matching 1.45% employer contribution. No wage base cap — applies to all wages. Employees earning over $200,000 ($250,000 for married filing jointly) are subject to an additional 0.9% Additional Medicare Tax, which you withhold but do not match.
Federal Unemployment Tax (FUTA): 6% on the first $7,000 of each employee’s wages per year — paid by the employer only, never withheld from employees. Most employers qualify for a 5.4% credit if they pay state unemployment taxes on time, reducing the effective FUTA rate to 0.6%.
State income tax: Nine states have no income tax. The rest require withholding based on state-specific tables and the employee’s state W-4 equivalent. If your employees work in multiple states, you may have withholding obligations in each.
State Unemployment Insurance (SUI): Employer-paid, based on a rate assigned by your state workforce agency. New employers typically start at a standard rate, then move to an experience-rated rate after their first few years based on how often former employees file for unemployment.
Deposit Schedules: When Taxes Are Due
Federal payroll taxes (income tax withheld + FICA) are deposited separately from when you run payroll — and the schedule depends on your total tax liability. New employers generally start on a monthly deposit schedule: taxes accumulated during a calendar month are due by the 15th of the following month. Once your tax liability exceeds a lookback period threshold, you move to semi-weekly deposits — taxes from Wednesday/Thursday/Friday payrolls are due the following Wednesday; taxes from Saturday/Sunday/Monday/Tuesday payrolls are due the following Friday.
The IRS’s failure-to-deposit penalty is brutal compared to other business penalties: 2% for deposits 1–5 days late, 5% for 6–15 days late, 10% for more than 15 days late, and 15% if the IRS has to contact you to collect. These penalties apply per payroll deposit period. If you’re on a semi-weekly schedule and miss two deposits per month, that’s two separate penalty calculations.
Filing Requirements
Form 941 (Employer’s Quarterly Federal Tax Return) is filed four times per year — April 30, July 31, October 31, and January 31 — and reconciles the taxes you withheld and deposited during the quarter. Most small employers file 941. Very small employers (under $1,000 in annual payroll tax liability) may be eligible to file Form 944 annually instead.
Form 940 (FUTA Return) is filed annually, due January 31. W-2s must be distributed to employees and filed with the SSA by January 31. If you have contractors paid $600 or more during the year, Form 1099-NEC is also due January 31. January is your busiest month for payroll compliance — plan for it. Per IRS employment tax guidance, late W-2s carry penalties ranging from $60 to $310 per form depending on how late they are.
The Most Common Small Business Payroll Tax Mistakes
Treating employees as contractors when they don’t meet the IRS criteria for independent contractor status is the most expensive payroll tax mistake small businesses make. You’re liable for both the employer and employee portions of FICA taxes on misclassified workers, plus penalties. The IRS has a 20-factor common law test for worker classification and runs regular audits in industries where misclassification is common — construction, restaurants, cleaning services, and transportation.
Not registering for state unemployment insurance before running payroll is another common mistake. SUI registration and rate assignments happen through your state workforce agency, separately from your federal EIN registration. Some states require registration before the first payroll; others give you a grace period. Retroactive registration is possible but creates complications.
A good payroll platform handles deposit calculations, schedule tracking, and filing for you. Netchex’s payroll and tax filing tools automate federal and state tax deposits and filings, so you’re not manually tracking due dates or calculating rates for every jurisdiction. That’s the practical fix for most small business payroll tax compliance risk.
Frequently Asked Questions
Employers withhold federal income tax, Social Security (6.2%), and Medicare (1.45%) from employee wages and remit them to the IRS. Employers also pay a matching 6.2% Social Security and 1.45% Medicare contribution on top of wages — these come from the employer, not the employee. Federal Unemployment Tax (FUTA) is employer-paid only, never withheld from employees. State unemployment insurance (SUI) is also employer-paid in most states. A few states (California, New Jersey, New York, others) also have state disability insurance programs with employee contributions.
Deposit frequency depends on your total federal payroll tax liability during a lookback period. New and small employers generally start on a monthly deposit schedule, with taxes due by the 15th of the following month. Once your liability exceeds the threshold, you move to semi-weekly deposits. If you accumulate $100,000 or more in taxes in any deposit period, you must deposit by the next business day. The IRS notifies you of your deposit schedule, but you can also check your lookback period liability yourself using Form 941 totals from prior years.
The IRS failure-to-deposit penalty starts at 2% for deposits 1-5 days late, increases to 5% for 6-15 days late, 10% for more than 15 days late, and 15% if the IRS has to contact you to collect. These penalties are calculated per deposit period, so missing multiple deposits compounds quickly. Deposit the taxes as soon as possible and address any penalty notices promptly — the IRS will apply your deposit to the oldest outstanding liability first unless you request specific allocation.
Most employers file Form 941 quarterly (due April 30, July 31, October 31, and January 31). Very small employers with $1,000 or less in annual payroll tax liability may qualify to file Form 944 annually instead. The IRS will notify you if you qualify for annual filing. Do not switch to annual filing on your own — you must receive IRS notification or approval first.
Ready to Stop Worrying About Payroll Tax Deadlines?
See how Netchex handles federal and state tax deposits, filings, and W-2s automatically so nothing falls through the cracks.
This guide reflects publicly available product information and independent reviewer data (G2, Capterra, Trustpilot, Yelp, Better Business Bureau, Reddit, Software Advice, GetApp) as of 2026. Feature availability and pricing may vary by plan. Contact each provider for current details.
Disclaimer: Any product roadmap or future plans provided herein are for informational purposes only. They do not represent a commitment to deliver any material, code, feature, or functionality. Plans may change without notification. The development, release and timing of any features or functionality described remain at the sole discretion of Netchex, its affiliates, and partners. Netchex does not give legal, tax, or accounting advice. You are responsible for ensuring your use of Netchex product meets your individual business and compliance requirements.
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