What Amount of Income Is Taxable: Deductions, Brackets, and Floors

For federal purposes, the amount of your income that is taxable is whatever remains after you subtract the standard deduction (or your itemized deductions) from your gross income. In the 2026 tax year, that means a single filer under 65 pays no federal income tax on the first $16,100 of income, a head of household pays none on the first $24,150, and a married couple filing jointly pays none on the first $32,200.¹ Everything above that floor is subject to graduated tax rates from 10% to 37%.

Two things drive the answer: what the law counts as income, and what it lets you subtract before applying the rates. Your filing status, your age, and the type of income you receive shape both sides of that equation.

What Counts as Income

Federal law defines gross income broadly. It includes all income from any source unless a specific provision excludes it.² In practice, that captures:

Wages, salaries, tips, and professional fees
Net self-employment profits reported on Schedule C³
Interest, dividends, and capital gains from selling stocks, real estate, or other assets
Rental income and royalties
Pensions, annuities, and most withdrawals from traditional IRAs and 401(k) plans
Gambling winnings, unemployment compensation, jury duty pay, and certain canceled debts

Every dollar from these sources adds to your gross income before any deduction is applied.

Income the Law Doesn’t Tax

Some receipts never enter gross income at all, so they don’t count toward your taxable amount or your filing obligation.⁴ The main exclusions:

Gifts and inheritances, though any earnings the property later produces (rent, interest, dividends) are taxable
Life insurance proceeds paid because of the insured person’s death
Workers’ compensation benefits for a work-related injury or illness
VA disability compensation and pension payments
Interest on most state and local government bonds
Compensatory damages for physical injury or sickness
Supplemental Security Income (SSI)

A retiree whose only receipts are VA disability payments and a modest inheritance may have no taxable income at all.

The Standard Deduction Sets Your Tax-Free Floor

The standard deduction is the amount you subtract from gross income before any tax is calculated. For 2026 it is:¹

Single or married filing separately: $16,100
Head of household: $24,150
Married filing jointly or qualifying surviving spouse: $32,200

If you or your spouse are 65 or older, you get an additional standard deduction on top: $2,050 for single and head-of-household filers, or $1,650 per qualifying person for married filers.⁵ A single filer age 65 or older therefore has no taxable income until gross income reaches $18,150, and a married couple filing jointly where both spouses are 65 or older has a floor of $35,500.

You can itemize instead if your deductible expenses (mortgage interest, state and local taxes, charitable gifts, and so on) exceed the standard amount.⁶ Either way, the number you’re left with is your taxable income.

How the Brackets Tax What’s Left

Whatever remains after the deduction runs through graduated rates. Each bracket applies only to income within its range, not to your whole income. For single filers in 2026:⁵

10% on taxable income up to $12,400
12% from $12,401 to $50,400
22% from $50,401 to $105,700
24% from $105,701 to $201,775
32% from $201,776 to $256,200
35% from $256,201 to $640,600
37% above $640,600

For married couples filing jointly, each bracket covers roughly double the range. The 10% bracket runs to $24,800, the 12% bracket to $100,800, and the 37% rate begins above $768,700.¹

A single filer with $55,000 in taxable income pays 10% on the first $12,400, 12% on the next $38,000, and 22% only on the last $4,600. Moving into a higher bracket never raises the rate on the income already earned below it.

Self-Employment Has a Much Lower Floor

Self-employment income doesn’t wait for the standard deduction. If your net self-employment earnings reach $400 in a year, you owe self-employment tax and must file a return, even if your total income stays under the regular filing threshold.⁷ The combined rate is 15.3%: 12.4% for Social Security on net earnings up to $184,500, and 2.9% for Medicare on all net earnings with no cap.⁸

So a freelancer who earned $500 on a side project may owe no federal income tax on it, but still owes self-employment tax on those earnings.

How Much of Social Security Gets Taxed

Social Security retirement benefits are tax-free for many recipients but become partly taxable once your combined income crosses set levels. The IRS calculates combined income as your adjusted gross income plus any tax-exempt interest plus half of your Social Security benefits.⁹

For individual filers:¹⁰

Combined income between $25,000 and $34,000: up to 50% of benefits may be taxable
Combined income above $34,000: up to 85% of benefits may be taxable

For married couples filing jointly:¹¹

Combined income between $32,000 and $44,000: up to 50% of benefits may be taxable
Combined income above $44,000: up to 85% of benefits may be taxable

These dollar figures have never been adjusted for inflation. No matter how high your income climbs, though, 85% is the ceiling; at least 15% of your benefits stays tax-free.

When Filing Still Makes Sense Below the Floor

If your gross income falls under the standard deduction and none of the special rules above apply, you generally don’t have to file. But you may want to. Any federal income tax your employer withheld from your paychecks is refundable only if you file a return.¹²

Filing is also the only way to claim refundable credits. The Earned Income Tax Credit alone can be worth up to $8,046 for a family with three or more qualifying children (2025 figures), and the Additional Child Tax Credit adds more on top. Those payments arrive only if you file and claim them.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
Office of the Law Revision Counsel. 26 U.S. Code 61 – Gross Income Defined
3
Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss From Business (Sole Proprietorship)
4
Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income
5
Internal Revenue Service. Revenue Procedure 2025-32
6
Internal Revenue Service. Deductions for Individuals: The Difference Between Standard and Itemized Deductions, and What They Mean
7
Internal Revenue Service. Topic No. 554, Self-Employment Tax
8
Social Security Administration. If You Are Self-Employed
9
Internal Revenue Service. Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits
10
Social Security Administration. Must I Pay Taxes on Social Security Benefits?
11
Internal Revenue Service. Social Security Income
12
USA.gov. Find Out if You Need to File a Federal Tax Return