Under federal tax law, what counts as income for taxes is nearly everything of value you receive during the year, unless a specific rule excludes it. The statutory definition of gross income sweeps in cash, property, services, and any other economic benefit that increases your net worth.1Office of the Law Revision Counsel. 26 USC 61 Gross Income Defined Wages, tips, freelance earnings, investment returns, retirement withdrawals, cryptocurrency gains, gambling winnings, and forgiven debts all belong on your return. A short list of receipts, including gifts, inheritances, child support, and most life insurance payouts, is carved out by statute. Everything else is presumed taxable until you can point to an exclusion.
Income You Have to Report
Wages, Tips, and Fringe Benefits
Every dollar of wages, salary, commissions, bonuses, overtime, severance, and accrued vacation pay is taxable, whether or not your employer issues a W-2.2Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income Tips are fully taxable too, including cash tips, and the IRS expects you to report them to your employer. If your employer fails to withhold Social Security and Medicare taxes from your pay, you are still on the hook and report the gap on Form 8919.
Most fringe benefits count as compensation at their fair market value. A company car used for personal trips, a paid gym membership, or a housing allowance all add to taxable income. Employer-sponsored health insurance, contributions to qualified retirement plans, and up to $5,250 per year in educational assistance are the main carve-outs.3Internal Revenue Service. Employer-Offered Educational Assistance Programs Can Help Pay for College Anything beyond those shows up on your W-2 and is taxed as wages.
Self-Employment, Freelance, and Barter
If you freelance, drive for a rideshare app, sell products online, or run any kind of business, every dollar of gross receipts is reportable. Clients who pay you $600 or more must send a Form 1099-NEC, but you owe tax on all earnings regardless of whether a 1099 arrives.4Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) You report net profit or loss on Schedule C of Form 1040.
Bartering is one area people routinely miss. If a web designer builds a site for a plumber in exchange for fixing a bathroom, both parties have received taxable income equal to the fair market value of what they got. The IRS treats non-cash exchanges the same as cash transactions.5eCFR. 26 CFR 1.61-1 — Gross Income
On top of ordinary income tax, self-employed workers owe self-employment tax at a combined 15.3%, covering both halves of Social Security (12.4%) and Medicare (2.9%) that an employer would normally split with you.6Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) Half of that amount is deductible when calculating adjusted gross income.
Interest, Dividends, Capital Gains, and Rent
Interest earned on savings accounts, CDs, and most bonds is taxed at your ordinary income rate. Your bank or brokerage sends Form 1099-INT if it pays you at least $10 in interest during the year.7Internal Revenue Service. About Form 1099-INT, Interest Income Municipal bond interest is one of the few exceptions and is generally exempt from federal tax, though it can still affect other calculations like the taxability of Social Security benefits.
Ordinary dividends are taxed at your regular rate. Qualified dividends, which most dividends from U.S. corporations are if you hold the shares long enough, are taxed at long-term capital gains rates of 0%, 15%, or 20% depending on income.8Internal Revenue Service. Topic No. 404, Dividends and Other Corporate Distributions Selling a stock, mutual fund, or piece of real estate for more than you paid produces a capital gain, reported on Schedule D. Short-term gains on assets held a year or less are taxed as ordinary income; long-term gains get the preferential rates.
Rental income counts, including not only monthly rent but also payments a tenant makes to cancel a lease early.
Cryptocurrency and Digital Assets
The IRS treats cryptocurrency, NFTs, and other digital assets as property, so every transaction can create a taxable event. Selling Bitcoin for cash, swapping one token for another, and using crypto to pay for goods or services all produce either a capital gain or a capital loss. Form 1040 includes a yes-or-no question asking whether you received, sold, exchanged, or otherwise disposed of any digital asset during the year, and answering “Yes” obligates you to report the details.9Internal Revenue Service. Digital Assets
Mining and staking rewards are taxed as ordinary income at the fair market value of the tokens on the date you receive them, reported on Schedule 1 of Form 1040. If you later sell those tokens, the difference between the sale price and your cost basis creates a separate capital gain or loss. Starting January 1, 2026, brokers must report cost basis on certain digital asset transactions, so the IRS will have more data to cross-check.
Retirement Withdrawals and Roth Conversions
Withdrawals from traditional 401(k) plans, traditional IRAs, and similar pre-tax retirement accounts are taxed as ordinary income in the year you take them. Pulling money out before age 59½ generally adds a 10% early withdrawal penalty, though exceptions exist for certain medical expenses, a first home purchase from an IRA, and substantially equal periodic payments, among others.10Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions Distributions show up on Form 1099-R.
Converting a traditional IRA to a Roth IRA creates taxable income in the year of conversion. The converted amount is added to your ordinary income for the year, which can push you into a higher bracket if you convert a large sum at once.
Social Security Benefits
Social Security payments may or may not be taxable depending on your total income. The IRS takes half your benefits and adds it to your other income. If that combined figure exceeds $25,000 for single filers or $32,000 for married couples filing jointly, up to 50% of benefits become taxable. Above $34,000 (single) or $44,000 (joint), up to 85% can be taxed.11Internal Revenue Service. IRS Reminds Taxpayers Their Social Security Benefits May Be Taxable These thresholds have not been adjusted for inflation since they were set in 1983 and 1993.12Social Security Administration. Taxation of Social Security Benefits
Unemployment, Prizes, and Gambling
Unemployment compensation is fully taxable and reported on Form 1099-G.13Internal Revenue Service. About Form 1099-G, Certain Government Payments Lottery jackpots, game show prizes, raffle winnings, and casino payouts are also taxable. Win a $30,000 car on a television show and you owe tax on its fair market value. Casinos issue a Form W-2G once slot winnings hit the reporting threshold, but you owe tax on all winnings regardless of whether a W-2G arrives.14Internal Revenue Service. Instructions for Forms W-2G and 5754
Legal Settlements and Jury Pay
Settlement rules turn on what the payment replaces. Compensatory damages for physical injuries are generally not taxable, but punitive damages are always taxable, even in a personal injury case. Settlements for lost wages, emotional distress without a physical injury, or breach of contract are taxable. Jury duty pay is reportable income, though if you hand that pay over to your employer because they kept paying your salary, you can deduct the amount you turned back in.
Debt Forgiveness
If a lender forgives a debt you owe, the forgiven amount is generally treated as taxable income. A credit card company writing off $10,000 you owed produces $10,000 in income to you, unless you qualify for the insolvency exclusion, which shelters the forgiven amount up to the degree your liabilities exceeded your assets at the time of the discharge.15Office of the Law Revision Counsel. 26 USC 108 Income From Discharge of Indebtedness
Worldwide Income
U.S. citizens and resident aliens owe tax on worldwide income, wherever earned. Foreign wages, business profits, and overseas investment returns all go on your U.S. return, converted to dollars at the applicable exchange rate.16Internal Revenue Service. U.S. Citizens and Residents Abroad – Filing Requirements The foreign earned income exclusion lets qualifying taxpayers exclude a set amount of foreign-earned wages each year if they meet either the bona fide residence or physical presence test.17Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 The exclusion applies only to earned income, not investment returns or pensions.
What Doesn’t Count as Income
Not every dollar that hits your bank account belongs on your return. The main statutory exclusions:
- Gifts and inheritances. Money or property received as a gift or inheritance is generally not taxable to you. Any gift tax concern belongs to the giver, not the recipient.18Internal Revenue Service. Whats New – Estate and Gift Tax
- Life insurance death benefits. Proceeds paid to a beneficiary because of the insured person’s death are excluded in most situations. If the policy was transferred to a new owner for valuable consideration, part of the payout could become taxable.
- Child support. Payments received as child support are not taxable to the recipient and not deductible by the payer.
- Alimony under post-2018 agreements. For any divorce or separation agreement finalized after December 31, 2018, alimony is neither deductible by the payer nor taxable to the recipient. Pre-2019 agreements still follow the old rules unless modified to adopt the new treatment.19Internal Revenue Service. Divorce or Separation May Have an Effect on Taxes
- Welfare and public assistance. Government payments providing basic support, including food assistance and housing subsidies, are not taxable.
- Employer-paid health insurance premiums. The portion your employer pays toward your health coverage is excluded from your income.2Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income
- Municipal bond interest. Interest on bonds issued by state and local governments is generally exempt from federal income tax.
Gray Areas Where People Get It Wrong
A few situations look like exclusions but aren’t. Forgiven debt is usually taxable. A Roth conversion is taxable in the year you convert, even though nothing was withdrawn for personal use. A large gift from a foreign person is not taxable income, but it can trigger a separate reporting requirement on Form 3520. And in a personal injury case, the compensatory damages may be tax-free while the punitive damages are taxable, so the character of each portion of a settlement matters.
What Happens if You Leave Income Off
The IRS has multiple ways to penalize taxpayers who omit income. The accuracy-related penalty is 20% of the underpaid tax when the shortfall results from negligence or a substantial understatement of income.20Internal Revenue Service. Accuracy-Related Penalty Missing income that was already reported to the IRS on a 1099 or W-2 is one of the clearest triggers, because the agency can match its records against your return automatically.
If you owe a balance after filing, the failure-to-pay penalty runs at 0.5% of the unpaid tax per month, capped at 25%.21Internal Revenue Service. Failure to Pay Penalty Interest accrues on both the unpaid tax and the penalties. Keep records of every income source, match them against the information returns you receive each January, and report everything, including income where no form was issued.