Paycheck Calculator Guide: Gross vs Net Pay & What Gets Deducted

Gross Pay vs Net Pay: The Core Difference

Every paycheck has two key numbers. Gross pay is your total compensation for the pay period — the full amount your employer owes you before anything is taken out. Net pay is what you actually receive. The gap between them can be significant.

For a typical worker earning $75,000 per year, that gap runs roughly $700–$800 per biweekly paycheck. Over a full year, taxes and deductions can consume 25–35% of gross income, according to BLS Consumer Expenditure data. Knowing where each dollar goes is the first step to managing your finances effectively.

Why the Gap Exists

The federal government mandates that employers withhold income taxes and FICA contributions at source — you never see that money hit your account. On top of mandatory withholdings, most employees voluntarily reduce their take-home pay further through pre-tax benefit elections that ultimately lower their tax bill.

The Complete Paycheck Deductions Breakdown

Your paycheck is reduced by a predictable set of deductions. Here is each one, in the order it typically affects your taxable income.

1. Federal Income Tax

Federal income tax is withheld based on your W-4 filing status and the IRS withholding tables in Publication 15-T. The 2025 federal tax brackets for a single filer are:

The marginal rate is only applied to income within each bracket — not your entire income. A $75,000 salary sits in the 22% bracket, but the effective federal tax rateon that income is closer to 13–14%. The withholding per paycheck is calibrated to hit that effective rate across the year.

2. State Income Tax

State income tax varies dramatically by location. California has the highest top rate at 13.3%(for incomes over $1 million), while nine states have no income tax at all: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Most working adults in taxed states see 3–7% of gross pay withheld for state income tax.

3. Social Security (OASDI)

The Social Security portion of FICA is 6.2% of gross wages, but only up to the annual wage base. The Social Security Administration set the 2025 wage base at $176,100. Once your year-to-date wages hit that threshold, Social Security withholding stops — high earners effectively get a raise mid-year.

4. Medicare (HI)

Medicare tax is 1.45% of all wages with no cap. For employees earning over $200,000 (single filers) or $250,000 (married filing jointly), an additional 0.9% Additional Medicare Tax applies under the Affordable Care Act. Unlike regular Medicare, employers do not match this surtax.

5. Health Insurance Premiums

If you have employer-sponsored health coverage, your share of the premium is deducted from each paycheck. According to KFF's 2024 Employer Health Benefits Survey, the average worker pays $1,368 per year for single coverage and $6,296 per yearfor family coverage — typically spread across 26 or 24 pay periods. These premiums are usually pre-tax under a Section 125 cafeteria plan.

6. 401(k) and Retirement Contributions

Traditional 401(k) contributions reduce your federal and state taxable income dollar-for-dollar. The 2025 employee contribution limit is $23,500 ($31,000 if age 50 or older). Contributing even a modest $200 per biweekly paycheck saves roughly $44 in federal taxes at the 22% bracket, on top of building retirement savings.

7. HSA and FSA Contributions

Health Savings Account (HSA) and Flexible Spending Account (FSA) contributions are triple tax-advantaged: they reduce your taxable income, grow tax-free, and can be withdrawn tax-free for qualified medical expenses. The 2025 HSA contribution limits are $4,300 for self-only coverage and $8,550 for family coverage.

8. Other Voluntary Deductions

Additional deductions may include dental and vision insurance premiums, life insurance, disability insurance, commuter benefits, and charitable payroll contributions. Some (like Roth 401k contributions) come out post-tax and do not reduce your taxable income.

Worked Example: $75,000 Salary, Biweekly Pay

A $75,000 annual salary paid biweekly yields a gross paycheck of $75,000 ÷ 26 = $2,884.62. Here is an approximate net pay estimate for a single filer in California with no pre-tax deductions beyond standard withholding:

This estimate assumes no pre-tax benefit deductions. Adding even a modest 401(k) contribution or health insurance premium would shift taxable income down and increase net pay slightly relative to the tax burden. Use our paycheck calculator to model your exact situation.

Pay Frequency Comparison: How Often You Get Paid

According to the Bureau of Labor Statistics, 42% of private-sector U.S. workers are paid biweekly— the most common frequency. Your pay frequency determines how large each gross check is at a given annual salary.

Bi-weekly and semi-monthly are often confused. Bi-weekly = every two weeks (26 paychecks/year). Semi-monthly = twice a month on fixed dates, typically the 1st and 15th (24 paychecks/year). Annual gross is identical regardless of frequency — only the per-check size changes.

Effective Tax Rate vs Marginal Tax Rate

One of the most common misconceptions about paychecks: people believe a raise into a higher bracket means they lose money. That is never true. Here is why.

The marginal tax rate is the rate applied only to the income within a specific bracket — not to your entire income. The effective tax rate is your total tax paid divided by your total income. It is always lower than your top marginal bracket.

For $75,000 in single-filer taxable income (after the standard deduction of $15,000 in 2025, so $60,000 taxable):

• First $11,925 taxed at 10% = $1,192.50
• Next $36,550 taxed at 12% = $4,386.00
• Remaining $11,525 taxed at 22% = $2,535.50
• Total federal tax = $8,114
• Effective federal rate on $75,000 gross = 10.8%

A raise to $80,000 does not push existing income into a higher bracket — only the new $5,000 is taxed at the marginal rate. Your take-home pay always increases with a raise.

W-4 Changes Post-2020 (TCJA Impact)

The Tax Cuts and Jobs Act of 2017 eliminated personal exemptions, which previously allowed employees to claim a fixed dollar amount per dependent to reduce withholding. The IRS redesigned the W-4 form in 2020 to reflect this change.

The new W-4 no longer uses “allowances.” Instead, employees:

• Select filing status (single, married filing jointly, head of household)
• Claim dependent credits as dollar amounts in Step 3
• Report other income or deductions in Step 4 (optional)
• Request additional flat withholding per period if desired

If you had a pre-2020 W-4 on file, your employer can continue using it. But if your situation changed — new dependents, second job, large investment income — submitting a new form ensures your withholding stays accurate and avoids a surprise tax bill in April.

Overtime and Your Paycheck

Under the Fair Labor Standards Act (FLSA), non-exempt employees must be paid at least 1.5× their regular rate for all hours worked beyond 40 in a single workweek. Overtime pay is taxable income and raises your gross pay for that period, potentially increasing the marginal federal and state tax withheld.

Example: A $22/hour employee works 44 hours in a week.

• Regular pay: 40 × $22 = $880
• Overtime pay: 4 × $33 = $132
• Gross for the week: $1,012

The higher gross triggers proportionally higher withholding that period. Your total annual tax does not increase beyond what your total income requires — any over-withholding comes back as a refund.

5 Deductions That Reduce Your Taxable Income on Your Paycheck

1. Traditional 401(k) contributions— Contributions come out before federal and state income tax. At a 22% marginal bracket, every $100 contributed costs only $78 in take-home pay.
2. Employer-sponsored health insurance premiums— Under a Section 125 cafeteria plan, premiums are exempt from federal income tax, state income tax, and FICA. One of the most tax-efficient benefits available.
3. Health Savings Account (HSA) contributions— Triple tax-advantaged: pre-tax in, tax-free growth, tax-free withdrawals for medical expenses. Requires a High-Deductible Health Plan.
4. Flexible Spending Account (FSA) contributions— Similar pre-tax treatment for healthcare and dependent care expenses. The dependent care FSA shelters up to $5,000/year, saving $1,100+ for a 22% bracket filer.
5. Dental and vision insurance premiums— Usually offered through the same employer cafeteria plan. Small but meaningful FICA-exempt deductions that compound over a career.

Frequently Asked Questions

What is the difference between gross and net pay?

Gross pay is your total earnings before any deductions — it is the number on your employment offer letter or contract. Net pay (also called take-home pay) is what hits your bank account after federal income tax, state income tax, FICA taxes, and voluntary deductions like 401(k) contributions and health insurance premiums are subtracted.

How much federal tax is withheld from my paycheck?

Federal income tax withholding depends on your gross pay, filing status, and W-4 elections. For a single filer earning $75,000/year ($2,884.62 biweekly), the IRS withholding tables (Publication 15-T) produce roughly $390 in federal tax per paycheck. Your effective federal tax rate on the full $75,000 salary works out to about 13–14%, well below the 22% marginal bracket for that income level.

What is FICA?

FICA stands for the Federal Insurance Contributions Act. It mandates two payroll taxes: Social Security (OASDI) at 6.2% of wages up to the wage base ($176,100 in 2025) and Medicare (HI) at 1.45% of all wages. An additional 0.9% Medicare surtax applies to wages above $200,000. Together, employee FICA totals 7.65% on most paychecks. Employers match the 7.65% on their end.

How do I change my tax withholding?

Submit a new Form W-4 to your employer's payroll or HR department. The post-2020 W-4 (revised after TCJA) no longer uses personal exemptions or allowances. Instead, you specify your filing status, claim dependents as dollar amounts, and optionally request extra withholding per pay period. Changes typically take effect within one to two pay cycles.

Why does my paycheck change if I get a raise?

A raise pushes more of your income into higher marginal tax brackets, so a larger portion of each additional dollar is withheld. For example, moving from $60,000 to $80,000 shifts some income from the 22% bracket deeper into that bracket. Your net pay rises, but not dollar-for-dollar with the gross increase. Social Security withholding also increases until your wages hit the annual wage base.