What is payroll? Definition, taxes, and how it works

Published Friday 20 March 2026

Table of contents

• What is payroll?
• Understanding payroll components
• Five employer payroll responsibilities
• How to set up payroll
• How to run payroll
• Dealing with tax
• Your payroll record-keeping obligation
• How to manage payroll
• What are employee payroll responsibilities?
• Simplify payroll with Xero
• FAQs on payroll

Key takeaways

• Understand that payroll involves five core responsibilities: paying wages, calculating benefits, withholding taxes, paying employer taxes, and filing required reports to stay compliant with federal and state agencies.
• Set up new employees properly by collecting Form I-9 and W-4, submitting new hire reporting to your state, and learning wage and salary rules including overtime requirements before their first day.
• Keep withheld taxes separate from your operating funds in a dedicated bank account, and maintain all payroll records for at least four years after filing as required by the IRS.
• Choose between in-house payroll software for direct control and lower costs, or hire a payroll service if you have complex needs like multiple states, varied pay structures, or many employees.

What is payroll?

Payroll is the process of compensating employees for their work. It includes calculating wages, withholding taxes, paying employer contributions, and keeping records for compliance.

For small business owners, payroll also means:

• Tracking hours and pay rates: Determine what each employee earns per pay period
• Making deductions: Subtract taxes, benefits, and other withholdings from gross pay
• Paying taxes: Submit withheld taxes plus employer contributions to federal and state agencies
• Filing reports: Provide required forms to the IRS and state tax agencies on schedule

Payroll isn't just cutting paychecks. It's a system that keeps your business compliant and your employees paid correctly and on time.

Understanding payroll components

Every payroll calculation involves the same basic components. Understanding these building blocks helps you see how employee pay comes together.

Gross wages

Gross wages are the total amount you owe an employee before any deductions. For hourly workers, multiply hours worked by their hourly rate. For salaried employees, divide their annual salary by the number of pay periods.

Deductions and withholdings

Deductions reduce an employee's gross pay before they receive their paycheck. Common deductions include:

• Federal income tax: Based on the employee's W-4 selections
• State and local income tax: Varies by location
• Social Security and Medicare (FICA): This 7.65% deduction from an employee's wages consists of two parts. According to the IRS, the tax rate for Social Security is 6.2%, and the rate for Medicare is 1.45%. As an employer, you're responsible for paying a matching 7.65%.
• Benefits contributions: Health insurance, retirement plans, and other voluntary deductions

Employer contributions

Employer contributions are amounts you pay on top of employee wages. These don't come from the employee's paycheck. They include:

• Employer FICA match: 7.65% of each employee's wages
• Federal unemployment tax (FUTA): The tax is 6% on the first $7,000 of wages per employee. However, the IRS states that employers can receive a credit of up to 5.4% for paying state unemployment taxes, which can lower the effective FUTA rate to 0.6%.
• State unemployment tax (SUTA): Varies by state

Payroll taxes

Payroll taxes include both the amounts you withhold from employees and the taxes you owe as an employer. Learn more in our guide on payroll taxes.

Net pay

Net pay is the amount employees actually receive after all deductions. This is the "take-home pay" that appears on their paycheck or direct deposit.

Five employer payroll responsibilities

No matter how big the job might seem, payroll boils down to five basic tasks:

• Pay wages: Compensate employees for hours worked or salary earned
• Calculate benefits: Track vacation, sick leave, insurance, and retirement contributions
• Withhold taxes: Deduct federal and state income taxes from employee pay
• Pay employer taxes: Submit payroll taxes you owe as an employer
• File reports: Submit required forms to prove compliance with tax agencies

You'll need a process to get everything right. Payroll breaks down into three phases:

• At hiring: Set up each new employee in your payroll system
• On payday: Calculate pay, make deductions, and issue payments
• For tax agencies: File required forms and submit tax payments on schedule

How to set up payroll

Setting up payroll happens before your employee's first day and ensures you can pay them correctly from the start. Complete these steps to stay compliant and avoid penalties.

1. Learn wage and salary rules: Understand overtime requirements before classifying employees. Paying a salary doesn't automatically exempt you from overtime rules. Check with the Department of Labor.
2. Collect Form I-9: Have employees complete this form with supporting documents to verify they can legally work in the US.
3. Submit new hire reporting: Send the required form to the state where you're reporting the employee's wages and taxes.
4. Collect Form W-4: Use this federal form to calculate how much income tax to withhold. Check with your state tax office for any state-specific version. If you're hiring in a new state, register with that state's tax agency first.

How to run payroll

Running payroll on payday involves four main steps:

1. Calculate gross pay: Determine what you owe each employee for the pay period based on hours worked or salary.
2. Make deductions: Subtract taxes, benefits contributions (insurance, retirement), and any other withholdings from gross pay.
3. Add employer contributions: Calculate the payroll taxes you owe as an employer. Not all payroll taxes come from employee pay. Learn more in our guide on payroll taxes.
4. Issue payment and records: Pay your employee, update vacation and sick day balances, and provide a pay stub summarizing all calculations.

Dealing with tax

Payroll tax obligations require you to report and pay taxes to federal and state governments on a set schedule. You're responsible for two main tasks:

• File tax forms: Submit Form 941 (quarterly) and W-2s (annually) to the IRS. Check with your state tax agency for additional requirements.
• Pay taxes: Remit the taxes you withheld from employee pay, plus the payroll taxes you owe as an employer.

Tax agencies set specific deadlines for these tasks. Payments may be due weekly, quarterly, or annually depending on your tax liability.

Keep withheld taxes separate from operating funds. Many businesses use a dedicated bank account to hold tax money until payment is due.

Your payroll record-keeping obligation

You're required to retain payroll documents for a specific period. Per IRS guidelines, you must keep all records of employment taxes for at least four years after filing the fourth quarter for the year. The IRS may ask you to provide:

• employee personal information
• copies of filed tax forms
• dates and amounts of tax payments
• dates and amounts of wage payments
• expense reimbursements
• retirement payment records

For more details, visit the record-keeping section of the IRS employer's tax guide.

How to manage payroll

Once you understand payroll basics, you need to decide how to handle it. Most small businesses choose one of two approaches.

In-house payroll with software

Payroll software automates calculations, tax filings, and recordkeeping so you can run payroll yourself. This option works well if you:

• want direct control over your payroll process
• have straightforward payroll needs (few employees, standard pay structures)
• prefer lower ongoing costs than outsourcing

Modern payroll software like Xero handles tax calculations, generates pay stubs, files required forms, and syncs with your accounting system.

Hiring a payroll service or professional

Payroll services handle some or all of your payroll tasks for a fee. Consider this option if you:

• have complex payroll needs (multiple states, varied pay structures, many employees)
• want to reduce the time you spend administering payroll
• prefer having experts handle tax compliance

You can hire a payroll service provider, work with an accountant or bookkeeper, or use a professional employer organization (PEO) that handles payroll alongside other HR functions.

What are employee payroll responsibilities?

Employee payroll responsibilities include providing required tax information and verifying their pay is accurate. Your employees need to:

• Complete tax forms: Fill out a W-4 and any state tax forms before starting work. This information determines how much tax to withhold.
• Report changes: Notify you when their circumstances change (new address, marital status, or withholding preferences).
• Review pay stubs: Check each pay stub to confirm pay, benefits, and taxes are reported correctly.

Simplify payroll with Xero

Managing payroll doesn't have to be complicated. While there are calculations, deadlines, and forms to handle, the right tools can simplify the entire process.

With Xero's payroll software, you can automate pay calculations, track employee hours, handle tax filings, and stay compliant. Focus on running your business while your payroll runs automatically.

Get one month free and see how simple payroll can be.

FAQs on payroll

Here are answers to common questions about payroll.

What does it mean to make payroll?

Making payroll means having enough cash available to pay all your employees on payday. It's a common phrase that reflects the business obligation to compensate workers on schedule.

What's the difference between payroll and a paycheck?

Payroll is the entire process of calculating pay, withholding taxes, and maintaining records. A paycheck is the payment an employee receives after payroll processing is complete.

How much does it cost to run payroll?

Payroll costs depend on your approach. DIY software typically costs $20 to $100 per month plus per-employee fees. Full-service payroll providers charge $50 to $200 per month plus per-employee fees.

What happens if I make a mistake with payroll?

Payroll errors can result in penalties from the IRS and affect employee satisfaction. Common consequences include late payment penalties, interest charges, and the cost of correcting tax filings. Acting quickly helps you resolve issues with minimal impact.

Do I need special software to run payroll?

Software isn't legally required, but payroll software saves time and improves accuracy. Payroll software automates calculations, reduces mistakes, and handles tax filings, making it the practical choice for most small businesses.