Paycheck Calculator

What This Calculator Covers

Your paycheck stub has two sides: what you earned and what was taken out. Most people track only the net deposit number without understanding the deduction column. This calculator makes the deductions explicit, showing how federal income tax withholding and FICA taxes consume a predictable portion of every paycheck.

The calculator covers the three federal deductions that appear on nearly every American paycheck: federal income tax withholding, Social Security, and Medicare. These three items together typically represent 15–35% of gross pay depending on income level and filing status. State income taxes, 401(k) contributions, health insurance premiums, and other voluntary deductions vary by employer and individual elections and are not included — but the sections below explain how each of them affects your take-home.

The distinction from the existing Salary Calculator and Tax Bracket Calculator on this site is the focus: this tool answers "what deposits into my bank account per paycheck?" rather than "what is my annual salary?" or "what is my year-end tax bill?"

Understanding Your Paycheck Deductions

A US paycheck stub typically lists deductions in a fixed order: federal income tax, state income tax (where applicable), Social Security, and Medicare. Together, these are called payroll taxes. Below the line there may also be voluntary deductions: health insurance premiums, dental and vision, 401(k) contributions, HSA deposits, life insurance, and any other benefit elections.

Federal income tax is the variable deduction — the amount changes with your income level, filing status, and W-4 elections. A single person earning $2,000 biweekly pays significantly different federal withholding than a married person earning the same gross pay.

Social Security and Medicare (FICA) are fixed-rate deductions that apply to virtually all earned income. Unlike federal income tax, FICA rates do not vary by income level — every dollar is taxed at the same rate until the Social Security wage base is reached. This makes FICA deductions entirely predictable from gross pay.

State income taxes are not calculated here but are a significant deduction in many states. Workers in California, New York, Oregon, Minnesota, and New Jersey face state taxes ranging from 5–13% of income on top of federal obligations. Workers in Texas, Florida, Nevada, Washington, Wyoming, Alaska, and South Dakota pay no state income tax at all, making federal deductions their only tax burden.

Pre-tax benefit deductions — 401(k), HSA, health insurance — reduce both taxable income and take-home pay simultaneously. The net effect is that pre-tax contributions cost less in take-home dollars than their face value because they reduce the taxes owed.

Federal Income Tax Withholding Explained

Federal income tax is a progressive tax — the rate increases in brackets as income rises. The 2025 rates for single filers range from 10% on the first $11,925 of taxable income up to 37% on taxable income above $626,350. Before the brackets apply, the standard deduction is subtracted: $15,000 for single filers, $30,000 for married filing jointly, $22,500 for head of household in 2025.

The per-paycheck withholding calculation annualizes your wages: the gross pay per paycheck is multiplied by the number of pay periods, giving an estimated annual gross. The standard deduction is subtracted to find taxable income. The tax on that taxable income is computed bracket by bracket, then divided by the number of pay periods. That amount is your estimated per-paycheck withholding.

Worked example (biweekly, single, $2,000/paycheck): Annual gross = $52,000. Standard deduction = $15,000. Taxable income = $37,000. Tax: 10% × $11,925 = $1,192.50 plus 12% × $25,075 = $3,009.00. Annual federal tax = $4,201.50. Per paycheck = $4,201.50 ÷ 26 = $161.60. Effective rate = 8.1%. Marginal rate = 12%.

Why you might owe at year-end or receive a refund: The withholding system is designed to estimate the full-year tax liability and collect it evenly across pay periods. However, if your income changes during the year, if you have income outside your employer (freelance, investments), or if your W-4 elections do not match your actual situation, your withheld amount will not precisely equal your tax owed. A large refund means you over-withheld — you gave the IRS an interest-free loan all year. Owing a large amount at filing means you under-withheld, which can trigger an underpayment penalty if the shortfall exceeds a threshold.

The most accurate way to calibrate withholding is to use the IRS Tax Withholding Estimator (available at irs.gov), update your W-4 accordingly, and check again each time your income or family situation changes.

Social Security and Medicare (FICA Taxes)

FICA taxes are the most misunderstood line items on most paychecks. Unlike federal income tax, they are not based on net taxable income — they are computed directly on gross wages, with no deductions applied first.

Social Security: 6.2%. Social Security tax applies at a flat 6.2% rate on every dollar of gross wages up to the annual wage base. For 2025, the wage base is $176,100. Once your cumulative wages for the year cross that threshold, Social Security withholding stops entirely for the rest of the calendar year. High earners who hit the cap in August or September often notice their net pay increase noticeably in those paychecks. The maximum Social Security tax any employee can pay in 2025 is $10,918.20 (6.2% × $176,100). Your employer matches your Social Security contribution dollar for dollar.

Medicare: 1.45%. Medicare tax has no wage base cap. The standard rate is 1.45% on all wages regardless of amount. For wages above $200,000 (single) or $250,000 (married filing jointly), an Additional Medicare Tax of 0.9% applies, bringing the total Medicare rate to 2.35% on those earnings. Employers are required to begin withholding the additional 0.9% once they have paid you more than $200,000 in wages in a calendar year, regardless of your filing status. If you are married and your combined household income crosses $250,000 but your individual wages did not reach $200,000, you may owe additional Medicare tax at year-end that was not withheld.

Employer match. Your employer pays an additional 7.65% (6.2% SS + 1.45% Medicare) on your wages, matching your contribution exactly. This employer-side FICA is not visible on your paycheck because it comes out of the employer's payroll budget, not your compensation. The total FICA contribution from both sides is 15.3% of your wages (up to the SS wage base). For self-employed workers, there is no employer to split the cost — self-employment tax is 15.3% of net self-employment income (reduced by a deduction for the employer-equivalent half).

Pre-Tax Deductions and Their Tax Impact

Pre-tax deductions reduce your federal taxable wages, which reduces the amount of federal income tax withheld. Depending on the type of deduction, they may also reduce FICA.

Traditional 401(k) and 403(b). Contributions are pre-tax for federal income tax purposes but are still subject to FICA. If you earn $3,000 biweekly and contribute $300 to a traditional 401(k), your federal taxable wages drop to $2,700 per paycheck — reducing your federal withholding by approximately $300 × your marginal rate. At a 22% marginal rate, that is $66 saved in federal taxes per paycheck. Your employer may also match a portion of your contribution, effectively increasing your compensation without touching your take-home.

HSA contributions through payroll. Health Savings Account contributions through payroll deduction are exempt from both federal income tax AND FICA. This makes HSA contributions more tax-efficient than 401(k) contributions on a per-dollar basis. A $100 HSA contribution through payroll saves approximately $22–$37 in federal income tax (depending on bracket) plus $7.65 in FICA — total savings of $30–$45 per $100 contributed.

Health insurance premiums via cafeteria plan. Most employer-sponsored health insurance is paid with pre-tax dollars through a Section 125 cafeteria plan. These premiums are not subject to federal income tax or FICA. The net cost to you is the premium amount reduced by the tax savings — for a worker in the 22% bracket paying $200/month in premiums, the after-tax cost is approximately $138/month.

Roth 401(k). Roth 401(k) contributions are after-tax — they do not reduce current federal income tax or FICA. You pay taxes on the money now, but qualified withdrawals in retirement (after age 59½ with the account open at least 5 years) are completely tax-free, including all accumulated growth. The tradeoff is higher take-home cost now vs. tax-free income in retirement.

State Income Taxes: What This Calculator Does Not Include

State income taxes can represent anywhere from 0% to 13.3% of income, making them a significant but highly variable component of the tax burden. Because state tax law varies dramatically by location, this calculator focuses on the federal layer — the portion that is identical regardless of where you live.

States with no income tax: Alaska, Florida, Nevada, New Hampshire (no tax on wages), South Dakota, Tennessee (no tax on wages), Texas, Washington, and Wyoming. Workers in these states pay federal taxes and FICA only, making the results from this calculator a close estimate of their total paycheck deductions.

Flat rate states: Colorado (4.4%), Illinois (4.95%), Indiana (3.05%), Kentucky (4.0%), Massachusetts (5.0%), Michigan (4.25%), North Carolina (4.5%), Pennsylvania (3.07%), and Utah (4.55%). Workers in flat-rate states can easily estimate their state deduction: multiply gross pay by the state rate.

Progressive state tax states: California tops out at 13.3% for income above $1 million (with lower rates on lower income — the base rate at $100K is around 9.3%). New York reaches 10.9% at the top bracket. Oregon peaks at 9.9%, Minnesota at 9.85%. In high-tax states, combined federal and state effective rates can push past 35% of gross income for middle-to-upper-middle earners. To estimate your total tax burden, add your state's effective rate to the federal effective rate shown in this calculator.

How to Increase Your Take-Home Pay

Several legal strategies can increase the amount that lands in your bank account each pay period. Some reduce your current taxes permanently; others defer taxes to later.

Maximize pre-tax 401(k) contributions — but target the marginal rate crossover point. Contributing enough to your traditional 401(k) to drop your taxable income into a lower bracket produces a step-change in take-home relative to contribution amount. For example, if your taxable income puts you just inside the 22% bracket, each dollar contributed to a traditional 401(k) saves 22 cents in federal tax. Dropping into the 12% bracket saves only 12 cents per additional dollar.

Open and max your HSA if you have an HSA-eligible high-deductible health plan. The 2025 contribution limits are $4,300 for individual coverage and $8,550 for family coverage. HSA contributions through payroll save federal income tax plus FICA — a dollar contributed through payroll costs about 70–85 cents in take-home pay.

Update your W-4 if you consistently get large refunds. A large refund means you overpaid federal taxes throughout the year. Use the IRS withholding estimator to recalibrate your W-4. Adding a dependent credit or removing extra withholding puts money in your pocket each paycheck instead of in an IRS account earning 0%.

Review your filing status. Head of household status (for unmarried filers who pay more than half the cost of maintaining a home for a qualifying dependent) has a higher standard deduction ($22,500 vs. $15,000 for single in 2025) and more favorable brackets. If you qualify for HOH but filed as single, update your W-4 to reflect the correct status.

Use the Overtime Calculator to understand how overtime pay is taxed before taking on extra hours. Because federal withholding uses annualized wages, a large overtime paycheck may be withheld at a higher rate than your typical effective rate — but you will not necessarily owe more total tax, just more up front with a potential refund at filing.

Pay Period Comparison

Pay period frequency affects the size of each individual check but not the total annual take-home (assuming constant gross pay and the same full year of employment). Understanding the mechanics of each frequency helps with budgeting.

Weekly (52 paychecks): Smallest per-check amounts. Useful for workers who prefer to align pay with a weekly budget cycle. Higher administrative overhead for employers, so less common in salaried roles.

Biweekly (26 paychecks): The most common frequency for US employers. Results in two months per year where three paychecks arrive — months where the first payday falls early enough that two biweekly cycles fit before the month ends, with a third mid-month paycheck. Budgeters who treat two biweekly paychecks as a monthly budget need to plan for these bonus months.

Semi-monthly (24 paychecks): Fixed to specific dates (typically the 1st and 15th or similar). Consistent with calendar-based budgeting and rent/mortgage alignment. Each paycheck is slightly larger than biweekly since the same annual pay is spread across fewer checks. However, there is no three-paycheck month — each month always has exactly two paychecks.

Monthly (12 paychecks): One large paycheck per month. Most common for executives and certain professional roles. Requires budgeting across a full month from a single deposit. The per-check amount is the highest of any frequency, but the withholding rate on each check is also calculated on that larger amount.

Frequently Asked Questions