Payroll Tax Compliance for Small Businesses
Every employer is legally required to withhold, report, and remit payroll taxes on time. Missing a deadline or making an error can trigger automatic IRS penalties that start at 2% and escalate quickly. Here is everything you need to know.
Tax guidance disclaimer
This page provides general educational information only. Tax rules change annually and vary by state, business structure, and circumstances. Consult a licensed CPA or tax professional for advice specific to your business before making compliance decisions.
Federal Payroll Tax Obligations
Federal Income Tax Withholding
Employee + EmployerRate: Varies by W-4
You withhold income tax from each employee's paycheck based on their W-4 elections. The amount depends on their filing status, allowances, and any additional withholding they request. You remit these funds to the IRS on a monthly or semi-weekly schedule depending on your total tax liability.
Filed on: Form 941 (quarterly), Form 944 (annual if liability under $1,000)
Social Security Tax (OASDI)
Employee + Employer (split)Rate: 6.2% each (12.4% total) on wages up to $168,600 (2024 wage base)
Both you and your employee contribute 6.2% of gross wages. The combined 12.4% funds Social Security. Wages above the annual wage base are exempt from Social Security tax but still subject to Medicare tax.
Filed on: Form 941, deposited with federal income tax
Medicare Tax (HI)
Employee + Employer (split)Rate: 1.45% each (2.9% total). Additional 0.9% withheld on employee wages above $200,000
Both you and your employee pay 1.45% of all gross wages with no wage base cap. For employees earning over $200,000 in a year, you must withhold an additional 0.9% Medicare surtax on the excess. You do not match the 0.9% surtax - only the base 1.45%.
Filed on: Form 941, deposited with Social Security
Federal Unemployment Tax (FUTA)
Employer onlyRate: 6% on first $7,000 wages per employee. Effectively 0.6% with the standard state credit
FUTA is paid by the employer only - you do not withhold it from employee paychecks. The gross rate is 6% on the first $7,000 of each employee's wages, but you typically receive a 5.4% credit if your state unemployment taxes are paid on time, leaving an effective rate of 0.6% ($42 maximum per employee per year).
Filed on: Form 940 (annual), with quarterly deposits if liability exceeds $500
Federal Tax Deposit Schedules
The IRS assigns your deposit schedule based on your total employment tax liability in the lookback period (the 12 months ending June 30 of the prior year). New employers start as monthly depositors.
Monthly Depositor
Who qualifies: Total employment taxes reported on Form 941 in the lookback period were $50,000 or less
Deposit timing: Deposit by the 15th of the following month
Semi-Weekly Depositor
Who qualifies: Total employment taxes reported on Form 941 in the lookback period exceeded $50,000
Deposit timing: Payday Wednesday-Friday: deposit by the following Wednesday. Payday Saturday-Tuesday: deposit by the following Friday.
Next-Day Depositor
Who qualifies: You accumulate $100,000 or more in tax liability on any single day
Deposit timing: Deposit by the next business day, regardless of your normal schedule
State and Local Payroll Tax Obligations
State Income Tax Withholding
43 states plus Washington D.C. impose income taxes and require employer withholding. Texas, Florida, Nevada, Wyoming, South Dakota, Washington, and Alaska have no state income tax. Each state has its own withholding tables, forms, and deposit schedules. If you have employees working in multiple states, you may need to register and file in each state.
State Unemployment Insurance (SUI / SUTA)
Every state administers its own unemployment insurance program. New employer rates typically range from 1% to 3.4% on a state wage base that varies from $7,000 (same as FUTA) to over $56,000 depending on the state. Your rate adjusts over time based on your claims history. Register with your state workforce agency when you hire your first employee.
State Disability Insurance (SDI)
California, New Jersey, New York, Hawaii, Rhode Island, and Puerto Rico require State Disability Insurance contributions. The rules and rates vary significantly by state. California SDI is withheld from employees at 1.1% of wages with no wage cap. If you have employees in these states, check current SDI requirements.
Local and Municipal Taxes
Some cities and counties impose local payroll or income taxes on top of federal and state taxes. New York City, Philadelphia, and Portland (Oregon) are notable examples. Louisville, Columbus, and many Pennsylvania municipalities also have local earned income taxes. Check with your local government or a CPA if you have employees in major urban areas.
IRS Penalties for Payroll Tax Violations
Payroll tax penalties are automatic. The IRS does not require intent - a single missed deposit triggers a penalty, even if it was an honest mistake.
| Violation | Penalty |
|---|---|
| Deposit 1 to 5 days late | 2% of unpaid deposit |
| Deposit 6 to 15 days late | 5% of unpaid deposit |
| Deposit more than 15 days late | 10% of unpaid deposit |
| Deposit not made within 10 days of first IRS notice | 15% of unpaid deposit |
| Failure to file Form 941 | 5% per month of unpaid tax, up to 25% |
| Failure to furnish W-2 by January 31 | $60 per form (up to $630,500 per year) |
| Willful failure to collect or pay over taxes (Trust Fund Recovery) | 100% of unpaid taxes assessed personally against responsible persons |
How Full-Service Payroll Eliminates Most of This Risk
Full-service payroll providers like Gusto, OnPay, ADP, and Paychex handle every federal and state tax calculation, deposit, and filing automatically with each payroll run. They also file your quarterly 941 forms, annual 940 form, and generate W-2s and 1099-NEC forms at year-end.
Most full-service providers guarantee their tax filings. If they make an error that triggers a penalty, they cover it. This guarantee alone often justifies the extra cost over basic payroll software.
If you choose payroll software instead, set calendar reminders for every federal and state deposit deadline and filing due date. The most common mistake is assuming the software handles filings automatically when it only handles calculations.