Key Takeaways at a Glance
- •Net Pay Formula: Net Take-Home Pay = Gross Earnings - Pre-Tax Benefits - Federal Income Tax - FICA Taxes - State/Local Taxes - Post-Tax Deductions.
- •Pre-tax deductions matter most: Contributing to a Traditional 401(k), HSA, or FSA lowers your taxable income before federal and state taxes are calculated, saving significant dollars.
- •FICA taxes are flat: 6.2% for Social Security (capped at $174,900 of earnings) plus 1.45% for Medicare with no wage ceiling.
When an employer offers you an annual salary of $75,000 or an hourly rate of $35.00, your actual paycheck will look quite different from simply dividing that figure by 12 or 26. Mandatory statutory withholdings—including Federal Income Tax, Social Security, Medicare, and state levies—alongside voluntary retirement and healthcare contributions, determine your ultimate spending power.
In this guide, we demystify the exact mathematical sequence mandated by the Internal Revenue Service (IRS) and state revenue departments so you can verify your paycheck stub down to the penny.
The 6-Step Payroll Calculation Framework
Determine Gross Pay Per Pay Period
For salaried employees, divide your annual gross compensation by your company's annual pay frequency:
Note for hourly workers: Gross pay is calculated as (Regular Hourly Rate × Regular Hours Worked) + (1.5 × Regular Hourly Rate × Overtime Hours).
Subtract Pre-Tax Deductions (IRC Section 125 & 401k)
Pre-tax deductions are subtracted directly from gross compensation before federal and state taxes are calculated. These include:
- Retirement Accounts: Traditional 401(k), 403(b), or 457 plans. (Reduces Federal and State taxable wages, but does NOT reduce FICA taxes).
- Section 125 Cafeteria Plans: Medical, dental, vision premiums, Health Savings Accounts (HSA), and Flexible Spending Accounts (FSA). (Reduces Federal, State, AND FICA taxes!).
Compute Federal Income Tax Withholding
Federal income tax uses a progressive marginal tax system. The IRS baseline for 2026 incorporates standard deductions ($15,000 for Single filers, $30,000 for Married Filing Jointly) and seven tax brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%.
Deduct FICA Taxes (Social Security & Medicare)
Under the Federal Insurance Contributions Act (FICA), every employee pays:
- Social Security (OASDI): 6.20% on earned income up to $174,900. Any dollar earned above $174,900 in 2026 is exempt from Social Security tax.
- Medicare (HI): 1.45% on all earned wages with no ceiling.
- Additional Medicare Tax: An extra 0.9% surtax (totaling 2.35%) applies to wages exceeding $200,000 for single taxpayers or $250,000 for married couples.
Subtract State & Local Income Taxes
Your state tax liability depends entirely on where you live and perform your work:
TX, FL, WA, NV, TN, WY, SD, AK, NH. No state withholding on earned wages.
PA (3.07%), IL (4.95%), NC (4.50%), IN (3.05%), CO (4.40%). Flat rate across all income.
CA (1% - 13.3%), NY (4% - 10.9%), NJ (1.4% - 10.75%). Rates climb with income tiers.
Calculate Final Net Pay (Take-Home)
Subtract any remaining post-tax deductions (such as Roth 401(k), union dues, wage garnishments, or voluntary life insurance). The remaining dollar balance is transferred to your checking account or issued via paycheck.
Real-World Numerical Example: $80,000 Salary in Texas vs. California
See the exact impact of state taxation on a Single employee earning $80,000/year with a 5% 401(k) contribution ($4,000) and $1,200 annual medical insurance premium:
| Component | Texas (0% State Tax) | California (Progressive Tax) |
|---|---|---|
| Gross Annual Salary | $80,000.00 | $80,000.00 |
| Pre-Tax Deductions (401k + Health) | -$5,200.00 | -$5,200.00 |
| Federal Income Tax | -$8,074.00 | -$8,074.00 |
| FICA Social Security (6.2%) | -$4,885.60 | -$4,885.60 |
| FICA Medicare (1.45%) | -$1,142.60 | -$1,142.60 |
| State Income Tax + SDI | $0.00 (0%) | -$4,312.00 |
| Net Take-Home Pay (Annual) | $60,697.80 | $56,385.80 |
| Bi-Weekly Paycheck (26x) | $2,334.53 | $2,168.68 |
*Difference: In Texas, the worker retains $4,312 more in take-home pay each year (over $165 per bi-weekly paycheck) due to the absence of state income tax and California SDI.
Calculate Your Personal Paycheck Now
Plug your exact hourly wage or annual salary into our free 2026 calculator to see your precise take-home earnings with pre-tax savings.