W-2 Box 1 — Wages, tips, other compensation
Your taxable federal wages for the year — gross pay minus pre-tax deductions like traditional 401(k), Section 125 cafeteria plan contributions, and pre-tax HSA.
At a glance — Box 1
- Box name
- Wages, tips, other compensation
- Reports to
- Form 1040, Line 1a
- Check against
- Your final pay stub's year-to-date federal taxable wages figure — not your annual salary. Box 1 is typically lower than Box 3 (Social Security wages) and Box 5 (Medicare wages) if you contribute to a traditional 401(k) or 403(b).
What Box 1 means
Box 1 reports your total taxable wages, tips, bonuses, and other compensation for the year — the number your federal income tax is actually calculated on, not your salary or gross pay. Per the IRS General Instructions for Forms W-2 and W-3, Box 1 excludes elective deferrals to a traditional 401(k) or 403(b) plan. That's the single biggest reason Box 1 comes in below what you'd expect from your offer letter or last raise.
What subtracts from gross pay to produce Box 1: traditional (pre-tax) 401(k)/403(b) elective deferrals, Section 125 cafeteria-plan premiums (health, dental, and vision coverage you pay for pre-tax), pre-tax health and dependent-care FSA contributions, pre-tax HSA payroll contributions (Box 12 code W), and pre-tax qualified transportation or parking deductions taken under an IRC §132(f) compensation reduction agreement. Each of these reduces what you owe federal income tax on now, in exchange for tax-free growth, tax-free reimbursement, or — for transportation benefits — simply excluding the benefit from wages entirely.
What adds to Box 1 beyond ordinary pay: the taxable cost of group-term life insurance coverage over $50,000, which IRC §79 treats as imputed income even though no cash changes hands (shown separately in Box 12 code C); designated Roth 401(k)/403(b)/governmental 457(b) contributions (codes AA, BB, EE), which are after-tax and already counted here; taxable fringe benefits like personal use of a company vehicle; nonqualified moving expense reimbursements; and, for a narrower group of employees, distributions from a nonqualified deferred compensation plan or income from exercising nonqualified stock options (code V).
Box 1 is usually lower than Boxes 3 and 5 because FICA taxes (Social Security and Medicare) don't recognize the 401(k)/403(b) pre-tax exclusion — those deferrals are still Social Security and Medicare wages in the year you earn them, even though they're excluded from federal income tax. Box 3 additionally caps out at the annual Social Security wage base while Box 5 has no cap, so the three boxes can diverge for three separate reasons on the same W-2. If you worked for more than one employer during the year, each issues its own W-2 with its own Box 1, and the amounts are added together on Form 1040, Line 1a.
Tax return implications
- Flows directly to Form 1040, Line 1a — the starting point for your total income.
- Combines with other income sources to determine your federal tax bracket, EITC eligibility, traditional IRA deduction phase-out, and Saver's Credit.
- Feeds the MAGI calculations behind Roth IRA contribution eligibility and several other income-based phase-outs.
- Counts as 'compensation' for figuring how much you're allowed to contribute to an IRA for the year.
- If you have more than one employer, each employer's Box 1 is reported separately and must be added together — the IRS matches the sum against what you report on Line 1a.
Common pitfalls & things to check
- If Box 1 is higher than expected, check for Roth 401(k)/403(b) contributions (code AA/BB) — those are after-tax and already included, unlike traditional deferrals.
- Imputed income from group-term life insurance over $50,000 (code C) is added to Box 1 even though you never received that money in cash.
- Exercising nonqualified stock options (code V) or vesting into restricted stock adds ordinary income to Box 1 that has nothing to do with your salary.
- A pre-tax deduction that lowers Box 1 doesn't necessarily lower Box 3 or Box 5 — don't assume all three boxes move together when you change your 401(k) contribution rate.
For 2025 returns (filed by April 15, 2026)
- Standard deduction (single / MFJ)
- $15,750 / $31,500
- MFS $15,750 · HoH $23,625. Box 1 wages below this threshold may owe no federal income tax.
Values sourced from central tax-year config at build time — update automatically on FY rollover.
FAQ
Why is my Box 1 less than my salary?
Pre-tax deductions reduce Box 1 below your gross salary — most commonly traditional 401(k)/403(b) deferrals, Section 125 health premiums, FSA contributions, pre-tax HSA contributions, and pre-tax transit or parking benefits. None of these are taxed for federal income tax purposes in the year you defer them.
Why is my Box 1 higher than my salary?
Usually because of imputed income — group-term life insurance coverage over $50,000, Roth 401(k) contributions (already after-tax), or income from vesting restricted stock or exercising nonqualified stock options. These add taxable compensation without adding to your take-home pay.
Does Box 1 include my bonus?
Yes — cash bonuses are part of Box 1 (and Boxes 3 and 5). The 22% flat rate you often see withheld on a bonus check is a withholding convention, not your actual tax rate; the real number gets reconciled when you file your Form 1040.
Does Box 1 include my employer's 401(k) match?
No. Employer matching and other employer (non-elective) contributions to a qualified retirement plan aren't your wages at all — they're excluded from Box 1, Box 3, and Box 5 entirely, not just from Box 1.
Related W-2 boxes
Box 2 — Federal income tax withheld
Total federal income tax your employer withheld from your paychecks during the year, based on your Form W-4 elections.
Box 3 — Social security wages
Your wages subject to Social Security tax, capped at the annual wage base. Differs from Box 1 because traditional 401(k) deferrals are not excluded.
Box 4 — Social security tax withheld
The Social Security tax your employer withheld — exactly 6.2% of Box 3 (plus Box 7 tips), capped at 6.2% of the annual wage base.
Box 5 — Medicare wages and tips
Your wages subject to Medicare tax. Unlike Social Security, there is no wage base cap — Box 5 can exceed Box 3 on high salaries.
Reconciling your W-2 at tax time? Use the paycheck calculator to verify expected federal, Social Security, and Medicare withholdings on your salary, and the federal income tax calculator to estimate your refund or balance owing before you file.
Related Calculators
Paycheck Calculator
Federal, state, FICA withholding, net take-home, W-4 alignment
Federal Income Tax Calculator
10–37% brackets, $15,750 standard deduction, progressive calculation
W-4 Withholding Calculator
Form W-4 steps, correct federal withholding, avoid penalties
FICA & Social Security
6.2% SS to $176,100, 1.45% Medicare, 0.9% additional Medicare
Tax Refund Estimator
Estimate federal refund, withholding vs liability, adjustments
401(k) Calculator
Contribution limits, employer match, tax-deferred growth
Sources
W-2 box definitions per IRS General Instructions for Forms W-2 and W-3 and IRC §6051. Rates and thresholds current for tax year 2025 (file by April 15, 2026); 2026 figures included where published.