What is payroll tax? A guide for small business owners

Published Monday 15 June 2026

Table of contents

• What are payroll taxes?
• Who pays payroll taxes?
• Federal versus state payroll taxes
• What are the largest payroll taxes?
• Social Security tax rate and deductions
• Medicare tax rate and deductions
• Federal unemployment tax rate and deductions
• Federal income tax deductions
• Self-employment tax
• How to calculate payroll taxes
• Employer payroll tax responsibilities
• Payroll tax reporting and forms
• Payroll tax deadlines and compliance
• Payroll tax penalties and how to avoid them
• Staying on top of payroll taxes
• Streamline payroll taxes with Xero
• FAQs on payroll taxes

Key takeaways

• Payroll taxes fund Social Security, Medicare, and unemployment programs, with employers and employees each paying 7.65% of wages in FICA taxes. For 2026, the Social Security wage base is $184,500.
• Employers are responsible for withholding, depositing, and reporting payroll taxes on time using forms like Form 941 and Form 940, with penalties for late or incorrect filings reaching up to 15% of the unpaid amount.
• Self-employed individuals pay both the employer and employee portions of FICA, totaling 15.3%, through quarterly estimated tax payments filed with Schedule SE.
• Using payroll software helps you automate calculations, stay on top of deadlines, and reduce the risk of costly compliance mistakes.

What are payroll taxes?

Payroll taxes are the taxes that employers withhold from employee wages and pay to federal and state governments. These taxes fund specific government programs, including Social Security, Medicare, and unemployment insurance.

Unlike income taxes, which fund general government operations and vary based on filing status, deductions, and credits, payroll taxes are calculated as a flat percentage of wages up to certain limits. Income taxes are progressive, meaning higher earners pay a higher rate, while payroll taxes apply the same rate to every dollar earned up to the applicable wage base.

As a small business owner, you're responsible for both withholding your employees' share and paying your own employer share of these taxes. Understanding how payroll taxes work is the first step toward staying compliant and avoiding penalties.

Who pays payroll taxes?

Both employers and employees share the cost of payroll taxes. The split depends on the type of tax.

For Social Security and Medicare taxes (collectively called FICA), employers and employees each pay an equal share. You withhold the employee portion from each paycheck and then match it with your own contribution. Federal Unemployment Tax (FUTA) is paid entirely by the employer.

If you're self-employed, you pay both the employer and employee portions of Social Security and Medicare taxes. This is known as self-employment tax and totals 15.3% of your net earnings. The IRS allows you to deduct the employer-equivalent half of your self-employment tax when calculating your adjusted gross income.

Federal versus state payroll taxes

Payroll taxes exist at both the federal and state level, and each comes with different rates, rules, and filing requirements.

Federal payroll taxes include Social Security, Medicare, and Federal Unemployment Tax (FUTA). These rates are set by the federal government and apply uniformly across all states. You'll report and deposit federal payroll taxes through the Electronic Federal Tax Payment System (EFTPS).

State payroll taxes primarily include State Unemployment Tax Act (SUTA) contributions. Every state sets its own SUTA rate, wage base, and experience rating system. New employers typically start with a standard rate, which adjusts over time based on your claims history. States with fewer unemployment claims against your account generally assign lower rates.

SUTA rates can range from less than 1% to more than 10% depending on your state and experience rating. Some states also require employee-paid taxes for disability insurance or paid family leave programs. Because state requirements vary so much, it's worth checking your specific state's labor department for current rates and obligations.

What are the largest payroll taxes?

The largest payroll taxes by dollar amount are Social Security and Medicare, which together make up FICA. Here's a breakdown of the major payroll taxes you'll encounter.

• Social Security tax: 6.2% from employers and 6.2% from employees on wages up to $184,500 in 2026
• Medicare tax: 1.45% from employers and 1.45% from employees on all wages, with an additional 0.9% on employee wages over $200,000
• Federal Unemployment Tax (FUTA): 6% on the first $7,000 of each employee's wages, paid by employers only
• State Unemployment Tax (SUTA): rates and wage bases vary by state, paid by employers in most states
• Federal income tax withholding: amounts vary based on each employee's W-4 form selections

Social Security tax rate and deductions

The Social Security tax rate is 12.4% of employee earnings, split equally between employer and employee at 6.2% each. This tax funds retirement, disability, and survivor benefits through the federal Old-Age, Survivors, and Disability Insurance (OASDI) program.

For 2026, the Social Security wage base limit is $184,500, up from $176,100 in 2025. This means neither employers nor employees owe Social Security tax on earnings above that threshold. The Social Security Administration adjusts this cap each year based on changes in average wages.

As an employer, you withhold 6.2% from each employee's gross pay and contribute a matching 6.2% from your own funds. Once an employee's year-to-date earnings reach $184,500, you stop withholding and stop matching for the rest of the calendar year.

Medicare tax rate and deductions

The Medicare tax rate is 2.9%, split equally between employers and employees at 1.45% each. Unlike Social Security, Medicare has no wage base limit, so this tax applies to every dollar of an employee's earnings.

An Additional Medicare Tax of 0.9% applies to employee wages exceeding $200,000 in a calendar year. Only the employee pays this surcharge; there's no employer match on the additional amount. You're required to start withholding the extra 0.9% once an employee's wages pass the $200,000 mark, regardless of their filing status.

For high-earning employees, the combined Medicare rate on wages above $200,000 is 2.35% on the employee side (1.45% plus 0.9%) and 1.45% on the employer side.

Federal unemployment tax rate and deductions

The Federal Unemployment Tax Act (FUTA) tax rate is 6% on the first $7,000 of wages you pay each employee per year. Only employers pay FUTA; it's not withheld from employee paychecks.

In practice, most employers pay far less than the full 6%. If you also pay State Unemployment Tax (SUTA) on time, you receive a credit of up to 5.4% against your FUTA rate. This brings your effective FUTA rate down to just 0.6%, or $42 per employee per year.

To receive the full 5.4% credit, you need to pay your state unemployment taxes by their due dates and your state must not be a credit reduction state. A state becomes a credit reduction state when it borrows from the federal government to cover unemployment benefits and doesn't repay the loan within 2 years. Employers in credit reduction states receive a smaller FUTA credit, which increases their effective federal rate.

Federal income tax deductions

Federal income tax is the portion of an employee's wages withheld to cover their annual income tax obligation. The amount you withhold depends on the information each employee provides on their W-4 form, including their filing status, number of dependents, and any additional withholding they request.

Unlike payroll taxes with fixed rates, federal income tax withholding uses the IRS tax brackets and tables published each year. You can use the IRS withholding tables in Publication 15 or an automated payroll system to determine the correct amount.

Federal income tax withholding is entirely the employee's obligation. You don't pay a matching portion. Your role is to calculate the correct withholding, deduct it from each paycheck, and deposit it with the IRS on time alongside FICA taxes.

Self-employment tax

If you're a sole proprietor, freelancer, or independent contractor, you don't have an employer splitting FICA taxes with you. Instead, you pay self-employment tax, which covers both the employer and employee portions of Social Security and Medicare.

The self-employment tax rate is 15.3% of your net self-employment earnings: 12.4% for Social Security (on earnings up to $184,500 in 2026) and 2.9% for Medicare (on all earnings). The Additional Medicare Tax of 0.9% also applies to self-employment income exceeding $200,000.

You report self-employment tax on Schedule SE, which you file with your annual tax return. Because self-employed individuals don't have taxes withheld from a paycheck, the IRS requires you to make quarterly estimated tax payments. These payments are due on April 15, June 15, September 15, and January 15 of the following year.

The IRS lets you deduct the employer-equivalent portion (half) of your self-employment tax as an above-the-line deduction on your income tax return. This reduces your adjusted gross income but doesn't reduce your self-employment tax itself.

How to calculate payroll taxes

Calculating payroll taxes involves applying the correct rate to each employee's gross wages for the pay period. Here's a step-by-step approach for a standard employee paycheck.

1. Start with gross pay

Determine the employee's gross wages for the pay period. This includes regular pay, overtime, bonuses, and commissions.

2. Calculate Social Security tax

Multiply gross wages by 6.2% for the employee's share. Match that amount with your employer contribution of 6.2%. Stop withholding once the employee's year-to-date earnings reach $184,500.

3. Calculate Medicare tax

Multiply gross wages by 1.45% for the employee's share and 1.45% for your employer share. If the employee's cumulative wages exceed $200,000 for the year, withhold an additional 0.9% from the employee's portion.

4. Determine federal income tax withholding

Use the employee's W-4 form and the IRS withholding tables to calculate the correct amount. Automated online payroll systems handle this calculation for you.

5. Apply FUTA and SUTA

Calculate your FUTA obligation at 0.6% (after the standard SUTA credit) on the first $7,000 of each employee's annual wages. Apply your state's SUTA rate to wages up to your state's wage base.

6. Review with an example

For an employee earning $5,000 in a biweekly pay period (under the Social Security wage base), here's a simplified calculation of the employer's share:

• Social Security: $5,000 x 6.2% = $310
• Medicare: $5,000 x 1.45% = $72.50
• FUTA: $5,000 x 0.6% = $30 (only until the employee reaches $7,000 year-to-date)
• Total employer cost for this pay period: $412.50, plus your state's SUTA contribution

Employer payroll tax responsibilities

As an employer, you carry the legal responsibility for payroll tax compliance. The Government Accountability Office reported in 2005 that unpaid payroll taxes represent billions in lost federal revenue each year, making this an area the IRS actively enforces.

Your core payroll compliance responsibilities include:

• Collecting a completed W-4 from every new employee before their first paycheck
• Withholding the correct amount of Social Security, Medicare, and federal income tax from each paycheck
• Paying your employer share of Social Security, Medicare, and FUTA on time
• Depositing withheld taxes and employer taxes according to your IRS deposit schedule
• Filing quarterly and annual payroll tax returns accurately and by the deadline
• Keeping thorough payroll records for at least 4 years

Xero Small Business Insights data shows US small business sales growth averaged just 2.4% year-over-year in 2025, roughly half the long-term average of 5.5%, meaning tighter revenues make every additional payroll cost more significant. Staying organized with your payroll obligations helps you avoid surprise expenses from penalties or back payments.

Payroll tax reporting and forms

The IRS requires employers to file several forms throughout the year to report wages, withholdings, and tax payments. Missing a form or filing late can trigger penalties, so it's worth knowing which ones apply to your business.

Form 941: employer's quarterly federal tax return

Most employers file Form 941 each quarter to report federal income tax withheld, Social Security tax, and Medicare tax. This form is due by the last day of the month following each quarter: April 30, July 31, October 31, and January 31.

Form 940: employer's annual federal unemployment tax return

Form 940 reports your annual FUTA tax obligation. It's due by January 31 each year, though you may need to make quarterly FUTA deposits if your liability exceeds $500 in any quarter.

Form 944: employer's annual federal tax return

If your annual payroll tax liability is $1,000 or less, the IRS may notify you to file Form 944 instead of quarterly 941s. This form covers the same information but only needs to be filed once a year by January 31.

W-2 and W-3 forms

By January 31 each year, you must provide every employee with a W-2 form showing their total wages and tax withholdings for the prior year. You also file Copy A of all W-2s along with a W-3 transmittal form with the Social Security Administration.

EFTPS: Electronic Federal Tax Payment System

You deposit your federal payroll taxes through the EFTPS, not by mailing a check with your return. You must enroll in EFTPS when you first start paying employees and use it for all federal tax deposits going forward.

Payroll tax deadlines and compliance

Payroll tax deadlines depend on the type of tax and the size of your payroll. Missing a deadline can result in penalties that add up quickly, so building a schedule into your workflow is essential.

The IRS assigns you a deposit schedule based on the total tax liability you reported during a lookback period. There are 2 main schedules:

• Monthly depositors: if you reported $50,000 or less in taxes during the lookback period, you deposit by the 15th of the following month
• Semiweekly depositors: if you reported more than $50,000, you deposit on Wednesdays (for Saturday through Tuesday paydays) or Fridays (for Wednesday through Friday paydays)

If your accumulated tax liability reaches $100,000 or more on any day during a deposit period, you must deposit by the next business day, regardless of your regular schedule.

Key annual deadlines to track include:

• January 31: W-2s due to employees; Form 940 due; Form 941 or 944 for Q4 (or full year) due
• April 30: Form 941 for Q1 due
• July 31: Form 941 for Q2 due
• October 31: Form 941 for Q3 due

Payroll tax penalties and how to avoid them

The IRS takes payroll tax compliance seriously, and the penalties for mistakes can escalate fast. Understanding the penalty structure helps you take steps to avoid it.

Late deposit penalties are based on how many days late your payment is:

• 1 to 5 days late: 2% penalty
• 6 to 15 days late: 5% penalty
• More than 15 days late: 10% penalty
• More than 10 days after first IRS notice: 15% penalty

Filing Form 941 late also carries a separate penalty of 5% of the unpaid tax per month, up to 25%. If you both file late and pay late, the combined penalties can become substantial.

Trust Fund Recovery Penalty

The Trust Fund Recovery Penalty (TFRP) is one of the most serious payroll tax consequences. It applies when an employer withholds Social Security, Medicare, and income taxes from employees but fails to deposit those funds with the IRS. The IRS can assess the full amount of the unpaid trust fund taxes personally against any "responsible person," which can include business owners, officers, and even bookkeepers who had authority over the funds.

Common mistakes that trigger penalties

Most payroll tax penalties come from avoidable errors. Watch for these common issues:

• Misclassifying employees as independent contractors, which avoids required withholding
• Missing deposit deadlines because you didn't know your assigned schedule
• Using incorrect tax rates or outdated wage base limits
• Failing to withhold the Additional Medicare Tax on wages over $200,000
• Not filing Forms 941 or 940 even when no taxes are due for the period

The best way to avoid penalties is to use a reliable small business payroll system that automates calculations and tracks deadlines. Setting up calendar reminders for quarterly and annual filing dates gives you a backup if your system doesn't send automatic alerts.

Staying on top of payroll taxes

Managing payroll taxes doesn't have to be overwhelming if you build the right habits and systems from the start.

Start by understanding what is payroll and how each tax type applies to your business. Once you know your obligations, set up a calendar with every deposit and filing deadline so nothing catches you off guard.

Keep your employee records current, especially W-4 forms. When employees change their withholding allowances or filing status, update your payroll system right away. Outdated information leads to incorrect withholding, which can create problems at year-end for both you and your employees.

Consider using online payroll tools that calculate taxes automatically, generate the right forms, and remind you of upcoming deadlines. Automation reduces the chance of manual errors and frees up your time to focus on running your business.

Streamline payroll taxes with Xero

Payroll taxes involve multiple tax types, changing rates, and strict deadlines. Trying to manage all of it manually takes time and increases the risk of errors that lead to penalties.

Xero's payroll software, powered by the Gusto integration, automates tax calculations, handles withholding, and helps you file the right forms on schedule. You can run payroll, track obligations, and keep your records organized from one platform, so get one month free.

FAQs on payroll taxes

Here are answers to frequently asked questions about payroll taxes.

What is the difference between payroll tax and income tax?

Payroll taxes are flat-rate taxes on wages that fund specific programs like Social Security and Medicare. Income taxes are progressive taxes based on your total taxable income, filing status, and deductions that fund general government operations.

How much do employers pay in payroll taxes?

Employers pay 7.65% of each employee's wages in FICA taxes (6.2% for Social Security up to $184,500 and 1.45% for Medicare), plus 0.6% in federal unemployment tax on the first $7,000 per employee. State unemployment taxes add additional costs that vary by state and employer experience rating.

Do self-employed people pay payroll taxes?

Self-employed individuals pay self-employment tax, which is the equivalent of both the employer and employee shares of FICA. The total self-employment tax rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare.

What are the penalties for not paying payroll taxes?

Late deposit penalties range from 2% to 15% of the unpaid amount depending on how late the payment is. The IRS can also assess the Trust Fund Recovery Penalty, which holds responsible individuals personally liable for the full amount of withheld but undeposited employee taxes.

What forms do I need to file for payroll taxes?

Most employers file Form 941 quarterly and Form 940 annually. You also provide W-2 forms to employees by January 31 each year and submit copies to the Social Security Administration with a W-3 transmittal form.

How often do you have to deposit payroll taxes?

Your deposit frequency depends on your total tax liability during the IRS lookback period. Most small businesses deposit monthly, by the 15th of the following month. Larger employers deposit on a semiweekly schedule tied to their payday.