Plain-English Guides
No jargon. No fluff. Just clear explanations of how your taxes, deductions, and take-home pay actually work in 2025.
Your gross pay is your full earnings before any deductions — what you agreed to when you took the job. Your net pay (take-home) is what actually lands in your bank account after taxes and deductions are taken out. For most full-time workers, the gap between gross and net is 20–35%.
Federal income tax is based on your annual income, filing status, and W-4 elections. State income tax varies — 9 states have none, others go as high as 13.3% (California). FICA taxes cover Social Security (6.2% up to $176,100) and Medicare (1.45%, plus 0.9% over $200k). These are non-negotiable regardless of your W-4.
Pre-tax deductions like 401(k), health insurance, FSA, and HSA reduce your taxable income — they're taken out before taxes are calculated, so they save you money twice: in contributions and in tax. Post-tax deductions like Roth 401(k) or life insurance come out after taxes with no immediate tax benefit.
YTD (Year-to-Date) columns track your running totals from January 1st. They're useful for verifying your annual tax liability when filing, and for checking whether you've hit contribution limits (e.g., the 2025 401(k) limit of $23,500).
Quick check: Add up all deductions on your stub and subtract from gross. The result should match your net pay. If it doesn't, contact your payroll department.
Weekly (52 checks/yr), biweekly (26), semi-monthly (24), or monthly (12). Biweekly is most common. Note that some months have 3 pay periods — your budget should plan around net annual income, not per-check amounts.
Calculate my take-home →The biggest misconception: entering a higher bracket doesn't tax your entire income at that rate. Only the income within each bracket is taxed at that rate. The brackets are "stacked" — you fill the lower ones first.
For 2025, a single filer with $80,000 taxable income pays: 10% on the first $11,925, then 12% on income from $11,926–$48,475, then 22% on the remaining income up to $80,000. Their marginal rate is 22%, but their effective rate is closer to 17%.
10%: $0 – $11,925 | 12%: $11,926 – $48,475 | 22%: $48,476 – $103,350 | 24%: $103,351 – $197,300 | 32%: $197,301 – $250,525 | 35%: $250,526 – $626,350 | 37%: Over $626,350.
Before brackets apply, you subtract your standard deduction (2025: $15,000 single, $30,000 married filing jointly). This is your taxable income — not your gross income. A single person earning $70,000 has taxable income of $55,000 after the standard deduction.
Key insight: Your effective rate is always lower than your marginal rate. Focus on your effective rate when comparing job offers or planning major financial decisions.
Pre-tax 401(k) contributions, HSA contributions, student loan interest (up to $2,500), and itemized deductions (mortgage interest, charitable gifts, state taxes up to $10,000) all reduce the income that gets taxed. Every dollar of pre-tax deduction saves you money at your marginal rate.
Calculate my federal tax →The W-4 determines how much federal income tax your employer withholds from each paycheck. It does not affect FICA (Social Security and Medicare) — those are always 7.65% and can't be changed.
The 2020 redesigned W-4 eliminated "allowances." Now you directly enter dollar amounts: multiple jobs, dependents, other income, and extra withholding. This makes it more accurate but also more confusing for many people.
You should file a new W-4 when you: get married or divorced, have a child, take a second job, start freelancing on the side, buy a home with a mortgage, or experience any major income change. The IRS recommends reviewing your withholding annually.
If you or your spouse have multiple jobs, withholding gets complicated. Each employer withholds as if that job is your only income — which leads to under-withholding because you're actually in a higher bracket combined. Use Step 2 of the W-4 to correct this, or use the IRS Tax Withholding Estimator.
The goal: Owe $0 and get $0 refund. A large refund means you over-withheld — you gave the government an interest-free loan. A large bill means you under-withheld and may owe a penalty.
You can claim exempt if you had no federal tax liability last year AND expect none this year. This is only valid for very low earners. Claiming exempt when you shouldn't is illegal and will result in a large tax bill plus penalties.
Check my withholding →Alaska, Florida, Nevada, New Hampshire (wages only), South Dakota, Tennessee (wages only), Texas, Washington, and Wyoming have no state income tax on wages. If you live and work in one of these states, your paycheck only faces federal taxes and FICA.
Flat-rate states apply one rate to all taxable income: Colorado (4.4%), Illinois (4.95%), Pennsylvania (3.07%), Utah (4.85%). Simple and predictable. Graduated states work like federal brackets — higher income faces higher rates. California tops out at 13.3% for income over $1M.
Your state income tax is generally based on your state of residence, not where your employer is. If you live in New Jersey but work in New York City, you pay NY state tax (and NYC local tax) at the source, then file a NJ return and get a credit for taxes paid to NY — avoiding double taxation, but still paying the higher of the two rates.
Remote workers: If your employer is in a high-tax state but you've moved to a no-tax state, you may still owe that state's taxes depending on their "convenience of the employer" rules. New York is the most aggressive enforcer of this rule.
Several cities layer on top of state tax: New York City (up to 3.876%), Philadelphia (3.75%), Cleveland (2%), and many others. These are often withheld automatically by your employer but easy to miss when moving to a new city.
Compare state taxes →Traditional (pre-tax) 401(k) contributions reduce your taxable income dollar-for-dollar. If you earn $80,000 and contribute $10,000, you're only taxed on $70,000 for federal and most state income tax purposes. At a 22% marginal rate, that's $2,200 in immediate tax savings — on top of the investment growth.
Employee limit: $23,500 (up from $23,000 in 2024). Catch-up (age 50+): Additional $7,500, for a total of $31,000. A new provision for ages 60–63: super catch-up of $11,250 instead of $7,500, for a total of $34,750. Combined employer + employee limit: $70,000.
A common match is "100% of your first 3%" or "50% of your first 6%." Both equal 3% of your salary in free money — but only if you contribute at least that much. Always contribute at least enough to capture the full match. It's an instant 50–100% return on that money before any market gains.
The compounding case: $500/month at 7% average annual return grows to ~$1.2M in 40 years. The same amount started 10 years later reaches only ~$566k. Time in the market matters more than contribution amount in the long run.
Traditional: pay taxes later (at retirement). Roth: pay taxes now, withdraw tax-free. If you expect to be in a higher tax bracket in retirement, Roth wins. If you expect lower rates later (or need the tax break now), traditional wins. Many plans allow splitting contributions between both.
Model my 401(k) →Under the Fair Labor Standards Act (FLSA), most hourly workers must be paid at least 1.5× their regular rate for every hour worked beyond 40 in a single workweek. "Workweek" is any fixed 7-day period — it doesn't have to be Monday–Sunday.
Some states go further: California requires daily overtime (1.5× over 8 hours/day, double time over 12 hours/day). Alaska, Nevada, and a few others have similar daily rules. Your employer must apply whichever rule — state or federal — is more generous to you.
Employees classified as exempt don't receive overtime, regardless of hours worked. To be exempt, you must meet all three tests: salary basis (paid a fixed salary, not hourly), salary level (at least $684/week as of 2024), and duties test (executive, administrative, or professional role). Misclassification is common and illegal — if you're performing non-exempt duties, your employer owes you overtime regardless of job title.
Overtime & taxes: OT is taxed at your marginal rate, not a special rate. Employers sometimes withhold more on OT weeks because the IRS withholding tables annualize each paycheck — but your actual annual tax bill is the same. You'll square up in April.
Your "regular rate" for overtime includes most forms of compensation: hourly wages, shift differentials, non-discretionary bonuses, and commissions. Discretionary bonuses, reimbursements, and overtime premiums themselves are excluded. If your employer pays a production bonus, it affects your OT rate — and many employers calculate this incorrectly.
Calculate my overtime →