A W-2 shows only the wages one employer paid you and the taxes withheld from those paychecks. Everything else that affects your federal return sits outside it: self-employment earnings, investment and rental income, retirement withdrawals, Social Security and unemployment benefits, gambling winnings, digital asset sales, gig platform payments, most fringe benefits, your filing status, your dependents, your itemized deductions, and any retirement or health savings contributions you made on your own. If you want to know what is not included on your W-2, the short version is that the form captures one payroll relationship and nothing beyond it.
Your employer reports taxable wages, Social Security and Medicare wages, federal and state income tax withheld, payroll-deducted retirement contributions, and certain fringe benefit costs. That form is due to you by January 31 of the following year, though for tax year 2025 the deadline shifts to February 2, 2026 because the 31st falls on a Saturday.1Office of the Law Revision Counsel. 26 USC 6051 – Receipts for Employees2Internal Revenue Service. Topic No. 752, Filing Forms W-2 and W-3 Everything below has to come from somewhere else.
Self-Employment and Freelance Income
Money you earn outside an employment relationship never appears on a W-2. Freelance work, consulting, side businesses, and independent contracts are self-employment income. The business or person paying you reports amounts of $600 or more on Form 1099-NEC.3Internal Revenue Service. Am I Required to File a Form 1099 or Other Information Return You report the income and related expenses on Schedule C.
The tax treatment differs from wages. Employees split Social Security and Medicare taxes with their employer, each paying half. Self-employed people owe the full combined rate of 15.3% (12.4% for Social Security plus 2.9% for Medicare) on net earnings, though half of that amount is deductible when calculating adjusted gross income. High earners also face an additional 0.9% Medicare surtax on self-employment income above $200,000 ($250,000 for joint filers).4Office of the Law Revision Counsel. 26 USC Ch. 2 – Tax on Self-Employment Income
Investment and Rental Income
Nothing your assets earn for you flows through payroll, so nothing about it appears on a W-2. Interest of $10 or more from savings accounts, CDs, and bonds is reported on Form 1099-INT.5Internal Revenue Service. About Form 1099-INT, Interest Income Stock dividends and mutual fund distributions come on Form 1099-DIV.6Internal Revenue Service. About Form 1099-DIV, Dividends and Distributions Brokerages report capital gains from sales of stocks, real estate, or other property on Form 1099-B, or you calculate the gain yourself when no broker is involved. Rental income and expenses go on Schedule E, and most rental situations generate no third-party reporting form at all.
Retirement Distributions and Government Benefits
Retirees and people receiving government payments often have substantial taxable income that never touches a W-2. Withdrawals from a pension, 401(k), IRA, or annuity are reported on Form 1099-R by the plan administrator.7Internal Revenue Service. About Form 1099-R, Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, Etc. Someone who retired mid-year might receive both a W-2 for their final months of employment and a 1099-R for pension or IRA distributions, and both belong on the return.
Social Security benefits come on Form SSA-1099 each January.8Social Security Administration. Tax Season: Encourage Your Clients to Go Digital! Depending on your total income, up to 85% of those benefits can be taxable. Unemployment compensation, state tax refunds, and certain agricultural payments are reported on Form 1099-G.9Internal Revenue Service. About Form 1099-G, Certain Government Payments Unemployment benefits are federally taxable even though no employer is involved.
Digital Asset and Gig Economy Income
Two newer reporting forms cover income that would have had no home a generation ago. Starting with tax year 2025, brokers handling cryptocurrency and other digital asset transactions must report proceeds on Form 1099-DA.10Internal Revenue Service. About Form 1099-DA, Digital Asset Proceeds From Broker Transactions Gains and losses on those sales still show up nowhere on a W-2.
Payments through third-party platforms like payment apps and online marketplaces may be reported on Form 1099-K. For 2026, the reporting threshold is $20,000 in gross payments and more than 200 transactions with a single platform.11Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill Falling below that threshold doesn’t make the income tax-free; it just means no form arrives to remind you.
Gambling Winnings
Casinos, racetracks, sportsbooks, and lottery agencies report certain winnings on Form W-2G rather than a standard W-2. For 2026, the minimum reporting threshold is generally $2,000, and for most wager types the payout must also be at least 300 times the bet.12Internal Revenue Service. Instructions for Forms W-2G and 5754 Winnings below those thresholds are still taxable. No form arrives, which makes them easy to overlook.
Fringe Benefits That Don’t Show as Wages
Some employer-provided compensation is excluded from taxable wages by federal law, so it doesn’t inflate the Box 1 wage figure. If your total compensation package feels larger than what your W-2 reports, this is often why.
Employer-paid health insurance premiums are excluded from gross income under Section 106 of the Internal Revenue Code.13Office of the Law Revision Counsel. 26 USC 106 – Contributions by Employer to Accident and Health Plans The Affordable Care Act does require employers to report the total cost of your health coverage in Box 12 using Code DD, but that number is purely informational and is not taxable.14Internal Revenue Service. Form W-2 Reporting of Employer-Sponsored Health Coverage
Employer-provided group term life insurance is tax-free for the first $50,000 of coverage; only the cost of coverage above that amount is added to taxable wages.15Internal Revenue Service. Group-Term Life Insurance Educational assistance is excluded up to $5,250 per year under a qualifying employer program, with anything above that treated as wages.16Office of the Law Revision Counsel. 26 US Code 127 – Educational Assistance Programs Commuter benefits for transit passes and qualified parking are excludable up to $340 per month for 2026.17Internal Revenue Service. Employer’s Tax Guide to Fringe Benefits
Personal Factors Your Employer Doesn’t Report
A W-2 tells the IRS what you earned at one job. It says nothing about the circumstances that determine what you actually owe.
Filing status is the biggest gap. Whether you file as Single, Married Filing Jointly, or Head of Household changes your brackets and standard deduction, but the W-2 doesn’t record it. Your employer used the information you gave them on Form W-4 to set withholding and then reported only the result.
Dependents don’t appear either. You might have told your employer about three children so they’d withhold less, but claiming those dependents, the Child Tax Credit, and the Earned Income Tax Credit happens on your return, not your W-2.18Internal Revenue Service. Child Tax Credit
Itemized deductions are invisible to payroll. Mortgage interest, charitable donations, medical expenses, and state and local taxes all reduce taxable income but sit outside the employer relationship entirely. Your mortgage servicer reports interest on Form 1098,19Internal Revenue Service. About Form 1098, Mortgage Interest Statement and your student loan servicer reports interest on Form 1098-E,20Internal Revenue Service. About Form 1098-E, Student Loan Interest Statement but those forms go straight to you and the IRS.
Contributions Made Outside Payroll
When your employer deducts 401(k) contributions from your paycheck, those amounts appear on your W-2 in Box 12. The 2026 elective deferral limit is $24,500, with an additional $8,000 catch-up for workers 50 and older, or $11,250 for those aged 60 through 63.21Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Contributions you make on your own are handled differently.
Traditional IRA contributions made directly from your bank account do not appear anywhere on your W-2. The 2026 annual IRA contribution limit is $7,500, or $8,600 if you’re 50 or older.21Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 You claim the deduction yourself.
Health Savings Account contributions work the same way. Payroll-deducted HSA contributions appear on the W-2; contributions you fund independently do not, and you claim those on your return. The 2026 contribution limits are $4,400 for self-only coverage and $8,750 for family coverage. Keep your own records.
Why Missing Income Off Your Return Matters
The IRS receives copies of every 1099, W-2G, and SSA-1099 issued in your name and runs automated matching against what you report. When something is missing, a notice proposing additional tax typically follows, with interest already accruing at the federal short-term rate plus three percentage points, compounded daily.22Internal Revenue Service. Quarterly Interest Rates
If the IRS finds negligence or a substantial understatement, it can add an accuracy-related penalty of 20% on the underpaid tax.23Internal Revenue Service. Accuracy-Related Penalty Anyone with significant non-wage income also needs to think about estimated tax. The system is pay-as-you-go, and if your W-2 withholding doesn’t cover the tax on investment, freelance, or rental income, you can owe an underpayment penalty even when you pay the balance at filing. You generally avoid that penalty by paying, through withholding and quarterly estimates combined, at least 90% of your current-year tax or 100% of last year’s (110% if your prior-year AGI exceeded $150,000).