You accept a job at $70,000 a year, do the quick math, and expect roughly $5,833 hitting your account each month. Then your first paycheck arrives and it's hundreds of dollars short. Welcome to the gap between gross pay (what you earn) and take-home pay (what you actually keep). That gap is real, it's predictable, and once you understand the order of deductions you can calculate your net pay down to the dollar.
In this guide we'll walk through the exact gross-to-net sequence U.S. employers use, define every deduction along the way, and run a fully worked example on a $70,000 salary using 2025 tax figures so you can reproduce the math for your own paycheck.
Gross Pay vs. Take-Home Pay: What's the Difference?
Gross pay is your total compensation before anything is removed — your annual salary divided by the number of pay periods, or your hourly rate multiplied by hours worked. Take-home pay (also called net pay) is what's left after every deduction comes out.
Those deductions fall into a few buckets, and the order they're applied in matters enormously because it determines how much of your income gets taxed:
- Pre-tax deductions — things like 401(k) contributions and health insurance premiums that come out before taxes are calculated, lowering your taxable wages.
- Payroll taxes (FICA) — Social Security and Medicare, withheld at fixed percentages.
- Federal income tax — based on your taxable wages, filing status, and W-4.
- State and local income tax — varies widely; some states have none at all.
- Post-tax deductions — things like Roth 401(k) contributions or wage garnishments taken after taxes.
What's left after all of that is your take-home pay. Our Take-Home Pay Calculator runs this whole sequence for you, but knowing the mechanics lets you sanity-check the result and plan around it.
The Gross-to-Net Formula, Step by Step
Here's the sequence every payroll system follows. Work through it in order and you'll land on your net pay:
- Step 1 — Start with gross pay. Your salary or hourly earnings for the pay period.
- Step 2 — Subtract pre-tax deductions. Traditional 401(k), pre-tax health/dental/vision premiums, HSA and FSA contributions. The result is your taxable wages.
- Step 3 — Calculate FICA taxes on the appropriate wage base (note: 401(k) is exempt from income tax but not from Social Security and Medicare — more on that below).
- Step 4 — Calculate federal income tax on your taxable wages, after the standard deduction.
- Step 5 — Calculate state and local income tax if your state has one.
- Step 6 — Subtract any post-tax deductions.
- Step 7 — What remains is your take-home pay.
The single most common mistake people make is assuming 401(k) contributions reduce all their taxes equally. They don't. A traditional 401(k) lowers the income subject to federal and state income tax, but Social Security and Medicare are still calculated on those dollars. Keep that distinction in mind as we work the example.
Understanding Pre-Tax Deductions (401(k) and Health Premiums)
Pre-tax deductions are your most powerful lever for increasing take-home efficiency, because every dollar you route into them escapes income tax. The big ones for 2025:
- Traditional 401(k): You can contribute up to $23,500 in 2025 (plus a $7,500 catch-up if you're 50 or older). Every dollar lowers your federal and state taxable wages.
- Health, dental, and vision premiums: When paid through an employer cafeteria (Section 125) plan, these come out pre-tax — and unlike a 401(k), they're typically exempt from FICA too.
- HSA contributions: Up to $4,300 (self-only) or $8,550 (family) in 2025, also pre-tax and FICA-exempt when made through payroll.
For reference, the IRA contribution limit is a separate $7,000 for 2025 ($8,000 if 50+), but traditional IRA contributions are usually deducted on your tax return rather than withheld from each paycheck, so they don't show up in this payroll math.
FICA: Social Security and Medicare
FICA is the flat payroll tax that funds Social Security and Medicare. It has two parts, and the rates are fixed by law:
- Social Security: 6.2% of wages, up to the 2025 wage base of $176,100. Earn more than that and you stop paying Social Security tax on the excess (the maximum employee contribution is $176,100 × 6.2% = $10,918.20).
- Medicare: 1.45% of all wages with no cap. High earners pay an extra 0.9% Additional Medicare Tax on wages above $200,000 (single) or $250,000 (married filing jointly).
Combined, that's 7.65% withheld from most paychecks before you ever get to income tax. Your employer pays a matching 7.65% on your behalf — money you never see but that's part of your true compensation cost. Remember: traditional 401(k) contributions do not reduce your FICA, so Social Security and Medicare are calculated on your gross wages (minus only FICA-exempt items like health premiums).
Federal Income Tax: 2025 Brackets and the Standard Deduction
Federal income tax is the most variable piece because it depends on your filing status, your W-4 elections, and the progressive bracket system. The U.S. uses marginal brackets, meaning each slice of income is taxed at its own rate — not your whole income at your top rate.
First, subtract the 2025 standard deduction from your taxable wages:
- Single: $15,750
- Married filing jointly: $31,500
- Head of household: $23,625
Then apply the 2025 brackets. Here are the rates for a single filer:
| Tax Rate | 2025 Taxable Income (Single) |
|---|---|
| 10% | $0 – $11,925 |
| 12% | $11,925 – $48,475 |
| 22% | $48,475 – $103,350 |
| 24% | $103,350 – $197,300 |
| 32% | $197,300 – $250,525 |
| 35% | $250,525 – $626,350 |
| 37% | $626,350+ |
The key insight: being "in the 22% bracket" does not mean you pay 22% on everything. You pay 10% on the first chunk, 12% on the next, and 22% only on the dollars that fall into that band. Your effective rate — total tax divided by total income — is always lower than your top marginal rate. Our Federal Income Tax Calculator applies these brackets automatically so you don't have to stack them by hand.
State Income Tax
State income tax is where take-home pay varies most by geography. Nine states levy no income tax at all on wages — Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Live in one of those and your only income tax is federal.
Everywhere else, you'll pay a state rate that might be flat (Colorado is 4.4%, Illinois 4.95%) or progressive (California tops out above 13% for very high earners). Many cities — New York City, parts of Ohio, Philadelphia — pile on a local income tax too. For our worked example we'll assume a flat 5% state rate, which is a reasonable middle-of-the-road figure for an income-tax state.
A Fully Worked $70,000 Example
Let's put it all together for a single filer earning $70,000 who contributes 5% to a traditional 401(k) and pays $1,800/year in pre-tax health premiums, living in a state with a flat 5% income tax.
Step 1 — Gross pay: $70,000.
Step 2 — Pre-tax deductions:
- 401(k): 5% × $70,000 = $3,500
- Health premiums: $1,800
Step 3 — FICA (health premiums are FICA-exempt, but the 401(k) is not). FICA wages = $70,000 − $1,800 = $68,200.
- Social Security: 6.2% × $68,200 = $4,228.40
- Medicare: 1.45% × $68,200 = $988.90
Step 4 — Federal income tax. Taxable wages = $70,000 − $3,500 − $1,800 = $64,700. Subtract the $15,750 standard deduction: $64,700 − $15,750 = $48,950 of taxable income.
- 10% on the first $11,925 = $1,192.50
- 12% on $11,925 to $48,475 ($36,550) = $4,386.00
- 22% on $48,475 to $48,950 ($475) = $104.50
- Total federal income tax = $5,683.00
Step 5 — State income tax (5% applied to the same $48,950 income-tax base for simplicity): 5% × $48,950 = $2,447.50.
Now total everything that comes out of gross pay:
| Item | Annual Amount |
|---|---|
| Gross Pay | $70,000.00 |
| 401(k) Contribution | − $3,500.00 |
| Pre-Tax Health Premiums | − $1,800.00 |
| Social Security (6.2%) | − $4,228.40 |
| Medicare (1.45%) | − $988.90 |
| Federal Income Tax | − $5,683.00 |
| State Income Tax (5%) | − $2,447.50 |
| Take-Home Pay | $51,352.20 |
So our $70,000 earner takes home about $51,352 a year, or roughly $4,279 per month / $1,975 per biweekly paycheck. That's a 73% take-home ratio. Note that the $3,500 in 401(k) money isn't "lost" — it's still yours, just invested for retirement instead of spendable today. Counting it, you're really only "losing" about 22% of gross to taxes.
Why Net Is So Much Lower Than Gross
Stack up the wedges and the gap makes sense. In our example, the deductions broke down like this:
- FICA (7.65%): $5,217 — flat and unavoidable on most wages.
- Federal income tax: $5,683 — an effective rate of about 8.1% on gross, even though the top marginal bracket touched was 22%.
- State income tax: $2,448 — zero in nine states, much higher in places like California or New York.
- 401(k): $3,500 — not a tax, but it leaves your paycheck, so it lowers take-home.
The two biggest takeaways: first, FICA is the great equalizer — nearly everyone pays 7.65% off the top regardless of deductions. Second, your effective tax rate is far below your marginal bracket, so don't panic when you hear "22% bracket." Where you live can swing your net pay by thousands of dollars a year on an identical salary.
Calculating Take-Home Pay from an Hourly Wage
If you're paid hourly rather than salaried, the only extra step is converting to an annual figure before running the same gross-to-net math. The quick formula: hourly rate × hours per week × 52. So $25/hour at 40 hours a week is $25 × 40 × 52 = $52,000 gross per year. Don't forget overtime (typically 1.5× for hours over 40 in a week) if it applies.
Our Hourly to Salary Calculator handles that conversion instantly, including part-time schedules and overtime, so you can drop the annual number straight into the Take-Home Pay Calculator and see your real net.
Common Take-Home Pay Mistakes
- Assuming your top bracket applies to all income. Brackets are marginal. Your effective rate is always lower.
- Thinking a 401(k) cuts every tax. It lowers income tax but not Social Security or Medicare.
- Forgetting state and local tax. A $70k salary nets very differently in Texas (no state tax) versus California or New York City.
- Ignoring the FICA wage base. Social Security stops at $176,100 of wages for 2025; Medicare never stops and adds 0.9% above $200k single.
- Confusing pre-tax and Roth contributions. Roth 401(k) money is taken after tax, so it doesn't lower your taxable wages today.
- Budgeting off gross. Always build your monthly budget around take-home pay, never the headline salary.
How to Use the Take-Home Pay Calculator
Doing this by hand once is great for understanding the mechanics. For everyday planning, let a tool stack the brackets and percentages for you:
- Enter your gross salary or hourly rate. Hourly? Run it through the Hourly to Salary Calculator first.
- Choose your filing status. Single, married filing jointly, or head of household — it sets your standard deduction and brackets.
- Add pre-tax deductions. Your 401(k) percentage, health premiums, and HSA/FSA amounts.
- Set your state. The calculator applies the right state rate (or zero for no-income-tax states).
From there you can instantly test scenarios: bump your 401(k) from 5% to 10%, compare a job offer in a no-tax state, or see how a raise actually changes your paycheck. Pair it with the Federal Income Tax Calculator to dig into the bracket math behind your federal withholding.
The Bottom Line
Take-home pay is gross pay minus pre-tax deductions, FICA, federal income tax, and state and local tax — applied in that order. In our $70,000 example, the headline salary became roughly $51,352 in take-home pay once 401(k) savings, the 7.65% FICA bite, federal tax, and a 5% state tax were all accounted for. Run the steps for your own numbers and you'll know exactly what lands in your account — and you'll budget off the real figure instead of the optimistic one. This article is for informational purposes only and is not professional tax advice; consult a licensed tax professional or financial advisor for guidance on your specific situation.
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