Paycheck Calculator by State

Pre-tax deductions reduce your taxable income before federal and state taxes are calculated, effectively lowering your tax bill. Common pre-tax deductions include 401(k) contributions (up to $24,500 in 2026, plus $8,000 catch-up for age 50+), health insurance premiums under employer plans, HSA contributions ($4,400 individual / $8,750 family for 2026), and FSA contributions ($3,400 for 2026).

A $500 per-paycheck 401(k) contribution on a biweekly schedule saves approximately $130-$165 in taxes per paycheck (at a combined 26-33% marginal rate), meaning the actual reduction in take-home pay is only $335-$370 rather than the full $500. Over a full year, this produces $13,000 in retirement savings at an after-tax cost of roughly $8,700-$9,620.

Post-tax deductions -- Roth 401(k) contributions, union dues, garnishments, life insurance beyond $50,000 in coverage, and disability insurance -- do not reduce current taxable income. However, Roth contributions grow tax-free and qualified withdrawals in retirement are completely tax-free. The choice between pre-tax and Roth depends on whether your current marginal rate is higher or lower than your expected retirement tax rate.

Biweekly pay (every 2 weeks, 26 paychecks/year) is the most common schedule in the U.S., used by approximately 43% of employers. Weekly pay (52 paychecks) is common in construction and hourly-heavy industries. Semi-monthly pay (24 paychecks, typically 1st and 15th) and monthly pay (12 paychecks) are more common for salaried positions and in certain states.

The pay frequency affects per-paycheck withholding but not annual tax liability. However, biweekly pay produces 2 "extra" paychecks compared to semi-monthly: twice a year, biweekly employees receive 3 paychecks in a single month instead of 2. For budgeting purposes, those 2 extra checks represent approximately 8.3% of annual gross pay. A $75,000 salary on biweekly produces $2,884.62/check vs. $3,125/check on semi-monthly.

The W-4 form, last redesigned in 2020, eliminated withholding allowances in favor of dollar amounts. Key W-4 decisions include: Step 2 (multiple jobs or spouse works), Step 3 (claiming dependents -- $2,000 per qualifying child, $500 for other dependents), and Step 4 (other adjustments including additional withholding). Incorrectly completing the W-4 results in either excessive withholding (interest-free loan to the IRS) or under-withholding (potential penalty).