Quick Summary
A guide to paycheck calculations - what gets deducted, how to estimate take-home pay, and why your gross salary doesn't equal what you actually receive.
There’s a moment early in most careers when the first real paycheck arrives and the number is… less than expected. Sometimes a lot less. A $70,000 salary sounds like $5,833 a month, but the actual deposit might be closer to $3,600.
Where does the rest go? That’s not a rhetorical question - it’s worth understanding, because every financial decision you make starts with what actually lands in your bank account.
The Paycheck Calculator breaks it all down for your specific situation. No signup required.
The Anatomy of a Paycheck
Let’s trace what happens to a $70,000 salary, paid biweekly (26 paychecks per year). Gross per paycheck: $2,692.
| What Gets Taken | Per Paycheck | Per Year |
|---|---|---|
| Federal income tax | ~$290 | $7,540 |
| State tax (at 5%) | ~$112 | $2,912 |
| Social Security (6.2%) | $167 | $4,340 |
| Medicare (1.45%) | $39 | $1,015 |
| 401(k) at 6% | $162 | $4,200 |
| Health insurance | $125 | $3,250 |
| Total deductions | $895 | $23,257 |
| What you keep | $1,797 | $46,743 |
That’s about 67% of gross pay. A third of the salary never reaches the checking account. The percentage shifts based on state, filing status, and how much goes to retirement - but the general pattern holds. Most people take home somewhere between 60% and 75% of their gross.
Each Bite, Explained
Federal income tax is the biggest chunk for most people. It’s withheld based on your W-4 form and projected annual income. The withholding system tries to estimate what you’ll owe so that your annual bill comes out roughly even.
State income tax ranges from nothing (Texas, Florida, Nevada, Washington, and a few others) to over 10% (California, New York at higher incomes). Moving from a 0% state to a 5% state on a $70,000 salary costs about $3,000 a year in take-home pay. That’s real money.
Social Security takes a flat 6.2% up to $176,100 in wages (2025 cap). Your employer pays a matching 6.2%. Once you hit the cap, Social Security deductions stop for the rest of the year - which is why higher earners sometimes notice slightly bigger paychecks late in the year.
Medicare takes 1.45% of everything, no cap. Above $200,000 (single), an additional 0.9% surtax kicks in.
Pre-tax deductions - 401(k), health insurance, HSA, FSA - come out before income tax is calculated, which is why they’re particularly efficient. More on this below.
The Pre-Tax Trick That’s Worth Understanding
A $500/month 401(k) contribution doesn’t reduce your paycheck by $500. For someone in the 22% federal bracket with 5% state tax:
- The 401(k) gets: $500
- Federal tax saved: $500 x 22% = $110
- State tax saved: $500 x 5% = $25
- Actual paycheck reduction: $365
You “spend” $365 from your take-home pay, but $500 goes into the retirement account. That $135 gap is a tax discount, and it applies to every pre-tax deduction - health insurance premiums, HSA contributions, FSA deposits.
This math is why a pre-tax retirement contribution is one of the more efficient ways to save. Each dollar contributed costs less than a dollar.
Biweekly Pay and the Two Bonus Months
If you’re paid biweekly, you get 26 paychecks a year. Most months have two pay periods. But twice a year, a month has three paydays.
This creates an interesting budgeting opportunity. If monthly expenses are built around two paychecks, those two three-paycheck months produce an “extra” paycheck that’s already unspoken for. Some people route those straight to savings or debt. Others don’t notice because the money blends into regular spending.
Knowing which months have three paydays - and having a plan for them - is one of the simpler ways to find money that was always there.
Semi-monthly pay (twice a month on fixed dates, 24 paychecks per year) doesn’t have this quirk. Each paycheck is slightly larger, but there are no bonus months.
Hourly Workers: A Different Starting Point
The math for hourly pay starts with: hourly rate x hours x 52 weeks / pay periods.
$25/hour at 40 hours/week = $52,000 annually, or $2,000 gross per biweekly paycheck.
Overtime makes the tax picture temporarily weird. A paycheck with 10 hours of overtime is larger, and the withholding system projects that higher amount across the entire year. The tax bite looks enormous. It’s not - the year-end calculation sorts it out - but it can feel discouraging in the moment.
When Your Withholding Is Off
Getting a $3,000 tax refund every April feels like a windfall. But it means you overpaid by $250 a month all year - that money was sitting with the IRS earning nothing while it could have been in your checking account or a savings account.
On the flip side, owing $2,000 at tax time means your paychecks were larger than they should have been. That might come with an underpayment penalty.
The sweet spot is somewhere close to zero - a small refund or a small balance due. The IRS has a Tax Withholding Estimator that helps dial in the right W-4 settings.
From Paycheck to Budget
Every budget lives or dies on one number: what actually arrives. Common mistakes include planning around gross salary (the aspirational number), averaging take-home when biweekly pay means some months are bigger, and forgetting that benefits enrollment changes in January can shift the paycheck amount.
The most reliable approach for biweekly pay: budget monthly expenses around two paychecks. Use three-paycheck months for goals that don’t fit the regular budget.
The Monthly Budget Template is built around actual take-home pay, and the Annual Tax Planner Template helps track withholding throughout the year so you’re not surprised in April.
More Tax & Income Guides
- Income Tax Calculator: Understanding Your Tax Bill - How brackets actually work
- Salary Converter: Annual to Hourly - Convert between pay frequencies
- Self-Employment Tax Calculator - For freelancers and contractors