Understanding Your Paycheck: Where Did 30% of Your Salary Just Go?
Published May 2, 2026
You signed an offer for $80,000 and your first paycheck shows up at $4,300 every two weeks instead of the $6,667 you mentally pictured. Where did the missing $2,000+ go? Here is a complete decode of every line on a typical U.S. pay stub — and where you have leverage to keep more of your money.
The 6 deductions on (almost) every paycheck
1. Federal Income Tax
The biggest line item, calculated using progressive brackets (10%, 12%, 22%, 24%, 32%, 35%, 37%). Your employer withholds based on your W-4 form. If you got a big refund last year, you over-withheld — that is an interest-free loan to the IRS. Update your W-4 to match reality.
2. FICA: Social Security (6.2%) + Medicare (1.45%)
Together: 7.65%. Social Security caps at $168,600 in 2025; Medicare has no cap. Self-employed people pay both halves (15.3%) — see the Self-Employment Tax Calculator.
3. State (and sometimes city) Income Tax
Ranges from 0% (Florida, Texas, Tennessee, Washington, etc.) to 13.3% (California's top bracket). NYC and a few other cities add their own.
4. 401(k) / Retirement Contributions
Pre-tax: reduces your taxable income today. Roth: taxed today, tax-free in retirement. The 2025 limit is $23,500. If your employer matches, contribute at least up to the match — that is an instant 50–100% return.
5. Health Insurance Premiums
Almost always pre-tax. Average employee share: $130/month for individual coverage, $525/month for family. An HSA-eligible high-deductible plan can be wildly tax-advantaged for healthy people.
6. Other (HSA, FSA, dental, vision, life, parking, transit)
Most are pre-tax fringe benefits. HSA contributions are triple tax-advantaged: deductible going in, tax-free growth, tax-free for medical expenses.
Worked example: $80,000 salary, single, Texas, 6% 401(k)
− 401(k) 6%: $400 (pre-tax)
− Health premium: $130
− Federal tax (~12% effective): ~$740
− FICA 7.65%: ~$510
− State tax: $0 (TX)
Take-home: ~$4,887/month — about 73% of gross.
Run your own numbers with the Paycheck Calculator or estimate a full year with the Income Tax Calculator.
4 levers to keep more of your paycheck
- Max your 401(k) match. See the 401(k) Calculator to size it up.
- Open an HSA if you are on a high-deductible plan. Triple tax advantage, no use-it-or-lose-it.
- Adjust W-4 withholdings so you owe (or get back) close to $0 in April.
- Use commuter benefits (transit, parking, FSA) — pre-tax dollars stretch further.
Bottom line
Your gross salary is the headline; your take-home is the truth. Decode every line on your stub once, fix the 2–3 dials in your control, and you will keep thousands more per year — every year.