A simple guide to calculating payroll taxes

Mastering how to calculate payroll taxes can feel overwhelming, but it is indeed a critical business requirement that benefits both businesses and individual taxpayers.

In fact, according to Statista, the United States recorded a total revenue of $1.71 trillion collected from payroll taxes in 2024, which contributed to providing economic stability that year. 

The process of accurately calculating payroll taxes can be tedious, but it becomes easier if taxpayers familiarize themselves with the process. 

This article will walk you through the simple steps and calculations to teach you how to calculate payroll taxes accurately, maintain compliance, and avoid possible mistakes.

What are payroll taxes?

Payroll taxes are mandatory contributions from employee wages and salaries, with employers often paying a shared amount, to fund social insurance programs.

Both employers and employees are responsible for paying these taxes, which are directly deducted from an employee’s paycheck. In the U.S., Social Security and Medicare are primary taxes under payroll.

It aligns with other state and federal unemployment taxes, which are also significant in providing the support needed by retirees, the unemployed, and disabled workers.

Having a clear understanding of how to calculate payroll taxes is beneficial to both employee and employer. No wonder payroll services are also becoming increasingly in demand today.

Types of payroll taxes

Payroll taxes comprise various categories that aim to fund and support government services, including various social programs. 

As discussed, taxes are divided into two types:

• Taxes paid only by the employer and 
• Taxes paid by both the employer and the employee

Here’s a more detailed breakdown of common types of payroll taxes to guide you:

Taxes paid by both employee and employer

These taxes form part of the Federal Insurance Contributions Act (FICA), which comes as a shared amount paid equally by the employer and the employee.

• Social security tax: 

This provides support benefits for survivors of deceased employees, retirees, and individuals with disabilities, with a flexible annual wage base and tax rate that can be adjusted each year. 

• Medicare tax: 

As the name indicates, this tax funds medicare insurance, providing health coverage for individuals aged 65 and above, as well as those with disabilities.

Compared to Social Security, it has no wage base limit, and workers earning above the income threshold also pay an additional medicare tax, which they shoulder solely.

Taxes paid by the employer only

These are the taxes that the employer shoulders and are not deducted from an employee’s paycheck:

• Federal Unemployment Tax (FUTA): 

This tax is specifically designed to fund federal and state unemployment programs, offering financial support to employees who have become unemployed.

• State Unemployment Tax (SUTA): 

Similar to FUTA, this is a state-level tax that funds a state’s specific unemployment insurance program. 

The tax rate can vary significantly by state and is often based on the employer’s history of unemployment claims.

Other payroll-related taxes

Other applicable taxes are sometimes added to the payroll process on top of the main federal taxes. These include:

• Federal Income Tax Withholding: 

While not a payroll tax like FICA, federal law requires employers to withhold federal income tax from an employee’s wages.

An employee’s Form W-4 directly dictates the amount of income tax withheld, which functions as a prepayment of their total tax liability for the year.

• State and Local Income Tax Withholding: 

Employers in certain states and cities are also required to withhold local or state income taxes from a worker’s wages, with rates and regulations that vary by location.

• State Disability and Family Leave Insurance: 

States such as New York and California have implemented mandatory, payroll-tax-funded programs to support paid family leave and short-term disability benefits.

How to calculate your payroll taxes

Calculating payroll taxes is a multi-step process that involves a combination of federal, state, and sometimes local taxes.

Not surprisingly, technology also revolutionized how we calculate payroll taxes through the use of professional tax software.

The formulas and rates are subject to change, so it’s crucial to use the most current information from the Internal Revenue Service (IRS) and your state’s tax agency.

Here’s a general guide to the steps on how to calculate payroll taxes:

1. Determine total gross pay 

Start by calculating the employee’s gross pay, which represents their total earnings for the pay period before any taxes or deductions are applied. 

• Hourly employees: Gross Pay = (Hours worked) x (Hourly rate)
• Salaried employees: Gross Pay = (Annual salary) / (Number of pay periods in the year)

2. Subtract your pre-tax deductions

Some deductions are taken before taxes, lowering an employee’s taxable income and the amount they owe.

Common examples include:

• 401(k) contributions or other retirement plans
• Health insurance premiums and Health Savings Account (HSA)
• Flexible Spending Account (FSA) contributions

The employee’s taxable wage base is their gross pay minus these pre-tax deductions.

3. Withhold FICA taxes

As mentioned, FICA taxes are composed of Social Security and Medicare taxes. Both the employee and the employer pay a portion of these taxes.

• Social security tax:

The tax rate for both the employee and employer is 6.2%. This tax applies only to wages up to the annual Social Security wage base. 

Once an employee’s cumulative earnings for the year exceed the base pay, you no longer withhold or pay Social Security tax on their wages for the remainder of the year.

Calculation formula: (Taxable wages) x 0.062

• Medicare tax: 

The rate for this tax set is 1.45% for both the employer and employee. Unlike Social Security, this tax has no wage base limit, which applies to all wages.

However,  an additional 0.9% tax is also imposed on employee wages that exceed a certain threshold ($200,000 for single filers), which they shouldered solely.

Calculation formula: (Taxable wages) x 0.0145

• Total FICA tax: 

FICA tax is the combined total of Social Security and Medicare taxes. The employer is responsible for withholding the employee’s share and contributing a matching portion.

4. Calculate and withhold federal income tax

Federal income tax is paid solely by the employee, unlike FICA taxes, which are shared by both the employee and the employer. 

However, the employer is responsible for withholding and remitting it to the IRS. 

The withholding amount is based on an employee’s gross pay and the information provided on their Form W-4. The IRS prescribes two main methods for calculations:

• The wage bracket method:

This method uses tables from IRS Publication 15-T (Circular E) to determine the correct withholding amount. 

The calculation is based on the employee’s gross pay, filing status, and number of dependents.

• The percentage method: 

This method utilizes a formula and tables to calculate a more precise withholding amount, serving as the standard for computerized payroll systems.

5. Calculate and pay for employer-only taxes

The two major federal taxes paid solely by the employer—and not deducted from an employee’s paycheck—are:

• Federal Unemployment Tax (FUTA): 

This tax funds the federal unemployment program. Its standard tax rate is 6.0% on the first $7,000 of each employee’s wages. 

However, employers can receive a credit of up to 5.4% for paying their state unemployment taxes, which can reduce their effective FUTA rate to as low as 0.6%.

Calculation formula: (First $7,000 of employee’s wages) x 0.006 (varies depending on the applicable rate)

• State Unemployment Tax (SUTA): 

This is a state-level tax that funds the state’s unemployment insurance program. It provides temporary financial support to workers who have lost their jobs.

6. Withhold local and state taxes

The final step is to calculate and withhold any applicable state and local taxes, comprising the following: 

• State income tax 
• Local income taxes
• State-specific payroll taxes that fund disability or family leave insurance

SUTA rates and wage base limits are highly dependent on the state and an employer’s unemployment claims history.

How to secure payments for payroll taxes

Your business’s financial health depends on more than just paying bills on time—it’s about protecting sensitive employee and company data.

By utilizing trusted, government-backed systems like the Electronic Federal Tax Payment System (EFTPS), you can ensure your payroll tax payments are secure from start to finish.

Taxpayers may also consider outsourcing the services of a payroll specialist who usually offers security services to protect and secure payroll payment taxes. 

Combine this with robust internal controls and the latest payroll software, and you’ll gain the peace of mind that comes with knowing your tax obligations are handled safely and accurately.

Managing payroll taxes more effectively through outsourcing

Facing the complexities of your payroll taxes? Well, outsourcing this critical function is a strategic way to simplify the process and is one of the emerging trends in the market today.

By hiring or outsourcing a professional payroll service provider, your business ensures timely and accurate tax filings, remains compliant with ever-changing regulations, and protects sensitive financial data.

This approach not only saves time and reduces the risk of penalties but also enables you to focus on business growth with confidence, addressing concerns about calculating payroll taxes effectively.