How to Calculate Taxable Income for an Individual

To calculate your taxable income, add up every source of income you received during the year, subtract specific adjustments to reach your adjusted gross income (AGI), then subtract either the standard deduction or your itemized deductions. If you have business income, one more subtraction may apply. The result is the number the IRS actually taxes, and for most people it is meaningfully smaller than what they earned. In 2026, the standard deduction alone removes $16,100 from taxation for a single filer and $32,200 for a married couple filing jointly.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026

Step 1: Total Your Gross Income

Federal law defines gross income as all income from whatever source derived.2Office of the Law Revision Counsel. 26 USC 61 – Gross Income Defined The starting point is everything: wages, freelance payments, investment returns, rental income, business profits, royalties, and pension distributions. If money came in, assume it’s taxable unless a specific rule says otherwise.

Most employees find the core number in Box 1 of Form W-2, which reports wages, tips, bonuses, and other compensation.3Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) Freelancers and independent contractors receive Form 1099-NEC. Investment income shows up on Form 1099-INT for interest, 1099-DIV for dividends, and 1099-B for capital gains from selling stocks or other assets. Less obvious sources count too: unemployment compensation on Form 1099-G, gambling winnings on Form W-2G, jury duty pay, and prizes all feed into gross income.

The IRS receives copies of every one of these forms and matches them against your return through automated systems. Leaving something out, even a small 1099 you forgot about, can trigger an accuracy-related penalty equal to 20 percent of the underpayment.4Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments Track down every form before filing.

Step 2: Leave Out What the Law Excludes

Not everything that hits your bank account belongs on your tax return. A handful of common categories are excluded from gross income by law, and overlooking them means you would overstate what you owe.

  • Life insurance death benefits received as a beneficiary are generally not includable in gross income. Interest earned on those proceeds after you receive them is taxable.5Internal Revenue Service. Life Insurance and Disability Insurance Proceeds
  • Money or property received as a gift or inheritance is not taxable income to the recipient. The giver may owe gift tax if the amount exceeds the annual exclusion of $19,000 per recipient in 2026, but that is the giver’s problem, not yours.6Internal Revenue Service. What’s New – Estate and Gift Tax
  • Interest from most state and local government bonds is exempt from federal income tax, though certain federally guaranteed bonds and private activity bonds may not qualify.
  • If you live and work abroad and meet either the bona fide residence or physical presence test, you can exclude up to $132,900 of foreign earned income from your 2026 gross income.7Internal Revenue Service. Foreign Earned Income Exclusion

Other common exclusions include employer-provided health insurance, workers’ compensation benefits, and qualified Roth IRA distributions. The pattern: Congress carved out specific exceptions, and if your income does not fall into one, it counts.

Step 3: Subtract Adjustments to Reach AGI

Once you have totaled your gross income, subtract certain deductions (called above-the-line deductions, because they come before you pick between the standard and itemized deduction) to reach your adjusted gross income. AGI matters beyond just this calculation: it determines your eligibility for many credits, deduction phaseouts, and even financial aid formulas.

The most common above-the-line deductions:

  • Student loan interest, up to $2,500 of interest paid on qualified education loans. The deduction phases out for single filers with modified AGI between $85,000 and $100,000, and for joint filers between $175,000 and $205,000.8Internal Revenue Service. Topic No. 456, Student Loan Interest Deduction
  • Health Savings Account contributions, up to $4,400 for self-only coverage or $8,750 for family coverage in 2026, if you have a qualifying high-deductible health plan.9Internal Revenue Service. Notice 26-05 – 2026 HSA Contribution Limits
  • Traditional IRA contributions, up to $7,500 for 2026 or $8,600 if you are 50 or older. Deductibility phases out at higher income levels if you or your spouse is covered by a workplace retirement plan.10Internal Revenue Service. Retirement Topics – IRA Contribution Limits
  • Self-employed health insurance premiums for yourself, your spouse, and your dependents, if you are self-employed with a net profit. The plan must be established under your business, and you cannot claim this for any month you were eligible for an employer-subsidized plan.11Internal Revenue Service. Instructions for Form 7206
  • Half of self-employment tax. If you work for yourself, you pay both the employer and employee portions of Social Security and Medicare taxes. The employer-equivalent half is deductible.li>
  • Educator expenses, up to $350 for out-of-pocket school supplies in 2026 for teachers and classroom professionals.
  • Moving expenses for active-duty members of the Armed Forces who relocate due to a permanent change of station.

These subtractions happen on Schedule 1 of Form 1040. Gross income minus qualifying adjustments equals AGI.

Step 4: Subtract the Standard or Itemized Deduction

From AGI, you subtract either the standard deduction or your itemized deductions, whichever is larger. This is the single biggest factor in shrinking your taxable income, and the 2026 numbers reflect significant changes under the One Big Beautiful Bill signed in mid-2025.

The Standard Deduction for 2026

Most filers take the standard deduction because the amount is generous enough to beat itemizing:1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026

  • Single or Married Filing Separately: $16,100
  • Married Filing Jointly or Qualifying Surviving Spouse: $32,200
  • Head of Household: $24,150

Taxpayers age 65 or older can claim an additional $6,000 on top of the standard deduction for 2026.12Internal Revenue Service. New and Enhanced Deductions for Individuals That is a substantial increase from prior years and worth checking even if you have always used the standard deduction in the past.

When Itemizing Beats the Standard Deduction

If your deductible expenses exceed the standard deduction, itemizing on Schedule A saves more. The major categories for 2026:

  • State and local taxes (SALT). Property taxes plus either state income or sales taxes, capped at $40,400 for 2026. That cap jumped from the previous $10,000 limit, making itemizing worthwhile again for many filers in high-tax areas.
  • Mortgage interest paid on up to $750,000 of home acquisition debt, or $375,000 if married filing separately. For mortgages taken out before December 16, 2017, the limit remains $1 million.13Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction
  • Medical and dental expenses, but only the portion exceeding 7.5 percent of your AGI. If your AGI is $80,000, only medical costs above $6,000 count.14Internal Revenue Service. Topic No. 502, Medical and Dental Expenses
  • Charitable contributions to qualified organizations remain deductible, but 2026 introduces a floor: only contributions exceeding 0.5 percent of your AGI count.

Taxpayers in the 37 percent bracket face an additional limit on the total tax benefit from itemized deductions under the new law.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Run the numbers both ways before filing. Tax software does this automatically, but understanding what you are comparing helps you plan purchases and donations before year-end.

Charitable Deduction for Non-Itemizers

Starting in 2026, even if you take the standard deduction, you can deduct up to $1,000 in cash charitable contributions, or $2,000 for married couples filing jointly. Donations to donor-advised funds do not qualify for this particular break. It is a separate deduction on top of the standard amount.

Step 5: Subtract the Qualified Business Income Deduction if It Applies

If you earn income through a sole proprietorship, partnership, or S corporation, one more deduction applies before your taxable income is final. The qualified business income (QBI) deduction, made permanent in 2025 under the One Big Beautiful Bill, lets eligible taxpayers deduct up to 20 percent of their qualified business income.15Internal Revenue Service. Qualified Business Income Deduction

This deduction comes off after the standard or itemized deduction, so it is sometimes called a below-the-line deduction. It does not reduce AGI, but it does reduce taxable income directly. For 2026, the full 20 percent deduction begins to phase down for specified service businesses once income exceeds roughly $203,000 for single filers or $406,000 for joint filers. The deduction can never exceed 20 percent of your total taxable income minus net capital gains, which prevents it from creating a loss on its own.

What Your Taxable Income Number Actually Does

The number you land on after all subtractions is your taxable income. The federal government taxes that amount in layers, not all at one rate. Each layer, called a bracket, applies a progressively higher rate only to the income within that range. For 2026, the brackets are:1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026

  • 10%: Up to $12,400 (single) / $24,800 (married filing jointly)
  • 12%: $12,401 to $50,400 / $24,801 to $100,800
  • 22%: $50,401 to $105,700 / $100,801 to $211,400
  • 24%: $105,701 to $201,775 / $211,401 to $403,550
  • 32%: $201,776 to $256,225 / $403,551 to $512,450
  • 35%: $256,226 to $640,600 / $512,451 to $768,700
  • 37%: Over $640,600 / Over $768,700

A single filer with $60,000 in taxable income does not pay 22 percent on the whole amount. The first $12,400 is taxed at 10 percent ($1,240), the next chunk up to $50,400 at 12 percent ($4,560), and only the remaining $9,600 at 22 percent ($2,112). Total federal tax: $7,912, or an effective rate of about 13.2 percent. Jumping into a higher bracket never makes your overall take-home pay lower.

Two Things That Sit Outside the Taxable Income Calculation

Tax credits are not part of this calculation. Deductions lower your taxable income; credits lower the actual tax you owe after the brackets are applied. A $1,000 deduction for someone in the 22 percent bracket saves $220 in tax, while a $1,000 credit saves a full $1,000 regardless of your bracket.16Internal Revenue Service. Credits and Deductions for Individuals Credits come after you have already found taxable income and looked up your tax.

State income tax is also separate. The steps above cover federal taxable income only. Most states impose their own income tax with separate brackets, deduction rules, and credits, and eight states levy no individual income tax at all. Some states use federal AGI as their starting point and adjust from there; others start from scratch. Check your state’s rules after finishing the federal calculation.