Estimate your net take-home pay after federal, state, and FICA taxes - plus pre-tax and post-tax deductions.
When you receive a paycheck, the amount you actually take home - called your net pay - is nearly always smaller than what you earned, which is called your gross pay. Gross pay is your total compensation before any taxes or deductions have been subtracted. Net pay, sometimes called "take-home pay," is what lands in your bank account after every withholding has been applied. The gap between the two can feel surprising at first, but each deduction serves a specific purpose, whether it funds government programs, your retirement account, or your health insurance premiums.
The largest chunk that most workers see withheld is federal income tax. The United States uses a progressive tax system, which means different portions of your income are taxed at increasing rates as your earnings rise. For example, only the dollars you earn above a certain threshold are taxed at the highest rate that applies to you - the rate that applies to your last dollar of income is called your marginal tax bracket. Your effective tax rate, on the other hand, is the actual average percentage of your entire income that went to federal taxes, which is always lower than your marginal bracket. Understanding both numbers helps you make smarter financial decisions about raises, bonuses, and retirement contributions.
FICA taxes - which stands for the Federal Insurance Contributions Act - fund two critical government programs: Social Security and Medicare. Every employee pays 6.2% of their wages toward Social Security, up to an annual cap (set at $176,100 for 2025). This cap means higher earners stop paying Social Security tax once they cross the threshold during the year. Medicare is taxed at 1.45% on all wages with no cap. Your employer matches both of these contributions on your behalf, meaning the government receives 12.4% total for Social Security and 2.9% for Medicare per employee - but you only see your half on your pay stub. High earners above $200,000 also pay an additional 0.9% Medicare surtax, though that is not reflected in standard paycheck withholding estimates.
Pre-tax deductions are amounts withheld from your gross pay before federal income tax is calculated. Common examples include contributions to a Traditional 401(k) or 403(b) retirement plan, Health Savings Account (HSA) contributions, Flexible Spending Account (FSA) contributions, and employer-sponsored medical, dental, and vision insurance premiums. Because these deductions lower the income that is subject to federal (and often state) income tax, they reduce your overall tax burden. This is often called the "tax shield" on pre-tax contributions - every dollar you put into a Traditional 401(k) is a dollar you do not pay income tax on today. Note that FICA taxes may still apply to some pre-tax deductions depending on the plan type. Post-tax deductions, by contrast, come out after taxes have been calculated and withheld. Examples include Roth 401(k) contributions (which grow tax-free in retirement), wage garnishments ordered by a court, union dues, and some supplemental insurance premiums.
Your filing status - Single, Married Filing Jointly, or Head of Household - has a significant impact on how much federal income tax is withheld from every paycheck. Each filing status comes with a different standard deduction amount and different bracket thresholds. For 2025, a married couple filing jointly benefits from a standard deduction of $30,000 and wider tax brackets than a single filer, meaning more of their income is taxed at lower rates. Head of Household status, available to qualifying single parents or caregivers, provides a larger standard deduction and more favorable brackets than Single status. You declare your filing status on IRS Form W-4, which you submit to your employer. If your life circumstances change - marriage, divorce, having a child - updating your W-4 promptly ensures your withholding stays accurate and helps you avoid a large tax bill or penalty at the end of the year.