How to Calculate Payroll Taxes: A Simple Step-by-Step Guide

Open any pay stub and you will discover a column of deductions labeled with acronyms like FIT, OASDI, MED, and SIT. Add them up, and a substantial portion of your gross earnings has disappeared before the net deposit reaches your bank account.

In everyday conversation, people use "payroll taxes" as an umbrella phrase for everything subtracted from an employee's check as well as what the employer pays on top. In legal and regulatory terms, however, payroll taxes specifically cover social insurance taxes:

1. 1Federal Income Tax Withholding (FIT): An ongoing installment payment toward your estimated annual federal income tax liability, based on your Form W-4 elections.
2. 2Social Security Tax (OASDI): 6.2% collected from the employee and 6.2% matched by the employer, capped at the annual wage base.
3. 3Medicare Tax (HI): 1.45% collected from the employee and 1.45% matched by the employer on all covered wages without an annual ceiling.
4. 4State and Local Taxes (SIT & Local): State income tax withholding in 41 states, plus mandatory employee disability or family leave contributions in states like California, New York, and Washington.
5. 5Unemployment Insurance Taxes: Federal Unemployment Tax Act (FUTA) and State Unemployment Tax Act (SUTA), paid exclusively by employers in almost all jurisdictions.

The easiest way to understand the difference between income tax and payroll taxes is to look at how each one scales and what it funds:

• Income Tax is Progressive: Slices of income are taxed at ascending rates ranging from 10% to 37%. Income tax applies only after subtracting your standard deduction ($16,100 for single filers in 2026) or itemized deductions.
• FICA Taxes are Flat: Social Security (6.2%) and Medicare (1.45%) apply from the very first dollar earned. There is no standard deduction or personal exemption for FICA. This is why lower earners frequently owe more in FICA taxes than in federal income tax.
• Settlement Process: Income tax withholding is an ongoing estimate. If your employer withholds too much, you receive a tax refund when filing Form 1040. Correctly withheld FICA taxes, by contrast, are final and non-refundable.

Every calendar year, the Internal Revenue Service and Social Security Administration adjust statutory wage bases and tax brackets for inflation:

• Social Security Wage Base: $184,500 in 2026. The 6.2% tax stops once your year-to-date wages cross this threshold, capping maximum employee withholding at $11,439.00.
• Medicare Tax Rate: 1.45% on 100% of wages with zero cap.
• Additional Medicare Tax: An extra 0.9% applies to employee wages exceeding $200,000 for single filers ($250,000 for married couples filing jointly). Employers do not match this surtax.
• Federal Standard Deduction (Single): $16,100 ($32,200 for Married Filing Jointly).
• Federal Unemployment (FUTA): Maximum effective rate of 0.6% on the first $7,000 of each employee's wages (after the standard 5.4% state credit), equaling a maximum of $42.00 per worker per year.

While federal rules apply uniformly across the country, state payroll tax structures diverge dramatically:

• Progressive State Income Tax: States like California (1%–12.3%), New York (4%–10.9%), and Hawaii feature graduated brackets.
• Flat Rate States: States like Pennsylvania (3.07%), Illinois (4.95%), and Colorado (4.4%) tax all wage income at a single fixed rate.
• Zero Wage Tax States: Seven states—including [Texas](/us/texas/paycheck-calculator), [Florida](/us/florida/paycheck-calculator), Nevada, Washington, Wyoming, South Dakota, and Alaska—levy zero individual state wage income tax.
• State Disability & Paid Family Leave: A minority of states require mandatory employee-paid payroll taxes. California enforces a 1.3% State Disability Insurance (SDI) tax with no wage cap. New Jersey, New York, and Washington state levy similar mandatory payroll assessments.

The true financial cost of employment is divided between withholding from the worker's earnings and payroll taxes remitted directly by the hiring company:

• Employee Deductions (Withheld from Gross Pay): 1. Federal Income Tax (based on Form W-4) 2. Social Security Tax (6.2%) 3. Medicare Tax (1.45% + 0.9% over $200k) 4. State & Local Income Tax (where applicable) 5. State Disability Insurance (in states like CA, NY)
• Employer Taxes (Paid in Addition to Gross Wages): 1. Matching Social Security Tax (6.2% up to $184,500) 2. Matching Medicare Tax (1.45% uncapped) 3. Federal Unemployment (FUTA, up to $42/year) 4. State Unemployment (SUTA, based on experience rating) 5. Workers' compensation insurance premiums

An employee earning a $60,000 base salary typically costs their employer between $65,000 and $68,000 annually in mandatory payroll taxes and insurance alone, before health benefits or retirement matches are factored in.

To calculate payroll taxes accurately, follow the standard order of operations used by certified payroll software and IRS Publication 15-T:

1. 1Step 1: Determine Gross Wages for the Period: Divide annual salary by pay periods (e.g., $60,000 ÷ 12 months = $5,000.00/month, or ÷ 26 biweekly periods = $2,307.69).
2. 2Step 2: Deduct Pre-Tax Benefits: Subtract qualified elective deductions. Traditional 401(k) contributions reduce income tax wages but not FICA. Section 125 health, dental, and vision insurance premiums reduce both income tax and FICA wages.
3. 3Step 3: Calculate Social Security (OASDI): Multiply FICA taxable wages by 6.2%. Stop withholding once cumulative year-to-date wages cross $184,500.
4. 4Step 4: Calculate Medicare (HI): Multiply FICA taxable wages by 1.45%. Add 0.9% for earnings exceeding $200,000.
5. 5Step 5: Calculate Federal Income Tax (FIT): Apply IRS Publication 15-T percentage tables matching the worker's Form W-4 filing status (Single, Married Filing Jointly, Head of Household).
6. 6Step 6: Compute State and Local Withholding: Apply your state's tax withholding formula and any mandatory SDI/FLI deductions.
7. 7Step 7: Subtract Total Deductions from Gross Pay: The remainder is the net paycheck deposited into the worker's account.

Let's calculate the exact monthly pay stub for a single employee earning $60,000 per year, paid monthly ($5,000/month), claiming the standard deduction with zero pre-tax deductions in a state with no income tax (such as Texas or Florida):

• Monthly Gross Pay: $5,000.00
• Social Security Deduction (6.2%): $5,000 × 0.062 = $310.00
• Medicare Deduction (1.45%): $5,000 × 0.0145 = $72.50
• Federal Income Tax Withholding:
  • Annual taxable income: $60,000 − $16,100 standard deduction = $43,900.00
  • Tax on first $12,400 at 10% = $1,240.00
  • Tax on remaining $31,500 ($43,900 − $12,400) at 12% = $3,780.00
  • Total annual federal tax = $5,020.00
  • Monthly withholding: $5,020 ÷ 12 = $418.33
• State Income Tax: $0.00
• Total Employee Withholdings: $310.00 + $72.50 + $418.33 = $800.83
• Monthly Net Take-Home Pay: $5,000.00 − $800.83 = $4,199.17

On the employer's ledger, this employee also generates a matching $310.00 Social Security and $72.50 Medicare payment each month ($4,590.00/year), plus FUTA and state unemployment insurance.

Whether you are an employee reviewing your stub or a small business owner processing payroll, watch out for these frequent misunderstandings:

1. 1Confusing Withholding with Final Tax Due: The federal income tax withheld on your pay stub is an ongoing estimate. Your final tax bill is settled when you submit Form 1040.
2. 2Assuming Social Security Never Ends: Social Security tax ends immediately after your cumulative wages hit $184,500 in 2026. Medicare never caps out.
3. 3Misclassifying Independent Contractors: 1099 independent contractors pay both halves of FICA through the 15.3% Self-Employment Tax (SECA). Misclassifying employees as contractors carries severe IRS and Department of Labor penalties.
4. 4Applying Flat Tax Rates to Supplemental Wages Incorrectly: Regular bonuses are generally withheld at a statutory 22% federal rate, rather than your ordinary marginal bracket.
5. 5Ignoring Local Wage Taxes: Cities like New York City, Philadelphia, and Columbus levy municipal income taxes that must be withheld alongside state taxes.

Review answers to the most common questions regarding federal and state payroll taxes: