How to Read Your Paycheck Stub: Gross Pay, FICA, Pre-Tax Deductions & Net Take-Home

When you open your bi-weekly or monthly paycheck, the net amount deposited into your bank account is substantially lower than your agreed salary or hourly rate. For most American workers, statutory withholdings and elective deductions absorb between 20% and 40% of gross earnings.

Understanding how each line item is calculated is essential. It allows you to catch employer payroll errors early, maximize retirement savings, and calibrate your annual tax liability.

This guide breaks down every section of a standard United States earnings statement (paystub) with verified rules and calculation formulas.

Quick Reference: The Core Paystub Formula

Your earnings statement follows a sequential mathematical hierarchy:

Gross Earnings (Salary, Hourly, Overtime, Bonuses)

• Pre-Tax Deductions (Traditional 401k, Section 125 Health, HSA, Commuter)

= Federal Taxable Wages (W-2 Box 1 Base)

• Federal Income Tax Withholding (Form W-4 Calculations)

• Social Security Tax (6.2% on wages up to $176,100+)

• Medicare Tax (1.45% uncapped + 0.9% Additional Medicare above $200k)

• State Income Tax Withholding (State-specific formulas)

• Local / Municipal Income Taxes (City/County wage taxes)

• Mandatory State Disability & Family Leave (CASDI, NY PFL, etc.)

• Post-Tax Voluntary Deductions (Roth 401k, Garnishments, Life Insurance)

= Net Take-Home Pay (Direct Deposit Amount)

1. Gross Earnings vs. Taxable Wages

Gross earnings represent the total compensation earned before any reductions:

• Salaried Exempt Employees: Your annual agreed salary divided by the number of annual pay periods (26 for bi-weekly, 24 for semi-monthly).
• Hourly Non-Exempt Employees: Regular hours worked multiplied by your base rate, plus overtime hours paid at 1.5 times your regular rate under Fair Labor Standards Act (FLSA) regulations.

The Critical Gap: Gross Pay vs. Taxable Pay

Your gross pay is rarely the amount used to calculate your income taxes.

Pre-tax deductions reduce your gross pay to create your Federal Taxable Wages (reported in Box 1 of Form W-2).

However, some deductions lower income taxes but do not lower payroll taxes. Understanding this distinction prevents common budgeting surprises.

2. Pre-Tax Deductions: Immediate Tax Shields

Pre-tax deductions reduce your taxable income before tax brackets are applied. These fall into two primary legal categories:

Why Section 125 Payroll Deductions Are Superior

Contributions to health insurance and HSAs through employer payroll bypass both income taxes and the 7.65% FICA payroll tax.

If you earn $75,000 and contribute $4,000 to an HSA via payroll, you save:

• $880 in federal income taxes (in the 22% bracket).
• $306 in FICA payroll taxes.
• Total immediate tax savings: $1,186.

If you fund an IRA or HSA outside payroll using a personal bank transfer, you recover income tax when filing your return, but you permanently lose the 7.65% FICA savings.

3. Mandatory Statutory Tax Withholdings

Federal and state laws mandate that employers withhold taxes from every paycheck.

Federal Income Tax (FIT) Withholding

Your employer calculates federal withholding using the parameters provided on your Form W-4:

• Your filing status (Single, Married Filing Jointly, Head of Household).
• Multiple jobs or working spouse adjustments.
• Dependent tax credits claimed in Step 3.
• Additional dollar withholding entered in Step 4(c).

Employers use IRS Publication 15-T (Federal Income Tax Withholding Methods) wage bracket percentage tables to determine the exact withholding per pay period.

FICA: Social Security and Medicare Taxes

The Federal Insurance Contributions Act mandates two payroll taxes:

1. Social Security (OASDI): * The tax rate is 6.2% of gross wages. * Capped at an annual statutory wage base ($176,100 for 2025/2026). * Once your year-to-date earnings exceed this cap, Social Security withholding immediately drops to $0 for the rest of the year.
2. Medicare Tax: * The tax rate is 1.45% on all earnings with no annual ceiling. * An additional 0.9% Additional Medicare Tax applies to wages exceeding $200,000 for single filers ($250,000 for married couples filing jointly).

4. State & Local Taxes (SIT & Local)

State withholding rules depend on where you live and where you physically perform work:

• Zero-Income-Tax States: Nine states impose no state income tax on earned wages: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming.
• Flat-Rate States: States like Pennsylvania (3.07%), Illinois (4.95%), and Indiana (3.00%) withhold a single flat rate across all wage levels.
• Progressive States: States like California (up to 13.3%) and New York (up to 10.9%) withhold progressive rates based on wage brackets.
• Local Wage Taxes: Cities like New York City (3.08% to 3.88%), Philadelphia (3.75%), and Columbus assess local municipal taxes directly on paystubs.

Mandatory State Disability & Paid Family Leave

Several states require employee-funded payroll withholdings for disability and family leave:

• California (CASDI): 1.2% uncapped on all wages.
• New York: Statutory SDI ($0.60/week) plus Paid Family Leave (PFL).
• Washington: WA PFML and WA Cares Fund deductions.
• New Jersey: NJ FLI and SUI/SDI deductions.

5. Post-Tax Voluntary Deductions

Post-tax deductions are subtracted after all taxes have been computed:

• Roth 401(k) / Roth 403(b): Contributions are made with after-tax dollars. They do not reduce current taxes, but all future growth and withdrawals in retirement are 100% tax-free.
• Employee Stock Purchase Plan (ESPP): Payroll deductions used to buy company stock at a discount (up to 15%).
• Supplemental Life & Disability Insurance: Post-tax coverage ensures that any future insurance payouts remain tax-free.
• Court-Ordered Wage Garnishments: Child support, tax levies, or unpaid debts withheld under legal orders.

6. Real-World Paycheck Breakdown

Let us analyze a bi-weekly paycheck for an employee in Illinois earning an $80,000 base salary ($3,076.92 gross per bi-weekly check):

Bi-Weekly Gross Salary: $3,076.92

Pre-Tax Deductions:

• Traditional 401(k) (6%): -$184.62

• Medical Insurance (Section 125): -$120.00

• Dental & Vision: -$25.00

• Health Savings Account (HSA): -$85.00

Total Pre-Tax Reductions: -$414.62

Taxable Wage Bases:

• Federal & State Taxable Wages: $2,662.30 ($3,076.92 - $414.62)

• FICA Taxable Wages: $2,846.92 ($3,076.92 - $230.00 health/HSA)

Mandatory Taxes Withheld:

• Federal Income Tax (Single, W-4 standard): -$274.50

• Social Security Tax (6.2% on $2,846.92): -$176.51

• Medicare Tax (1.45% on $2,846.92): -$41.28

• Illinois State Income Tax (Flat 4.95%): -$131.78

Total Taxes Withheld: -$624.07

Post-Tax Deductions:

• Roth IRA / Roth 401(k) Contribution: -$50.00

• Supplemental Disability: -$15.00

Total Post-Tax Deductions: -$65.00

NET TAKE-HOME PAY DEPOSITED: $1,973.23

Net Retention Ratio: 64.13%

In this scenario, the worker takes home $1,973.23 every two weeks. Pre-tax contributions shield $414.62 from immediate taxation, saving over $100 per check in combined federal and state taxes.

Paystub Audit Checklist for Workers

Review your paystub quarterly to catch common payroll errors:

1. Verify Your Filing Status: Confirm your employer's system lists your correct W-4 filing status.
2. Track Social Security Year-to-Date (YTD): If your earnings cross $176,100, ensure your payroll department stops deducting the 6.2% Social Security tax.
3. Cross-Check Overtime Multipliers: Ensure non-discretionary bonuses are included in your regular rate when overtime is calculated.
4. Confirm Benefit Classifications: Check that health and dental insurance premiums are deducted pre-tax rather than post-tax.

Simulate your take-home pay under different contribution levels with our Free Paycheck Calculator.