The U.S.A. has federal income tax as well as in many places state and local income tax. In general, the federal system will tax individual taxpayers on their adjusted gross income on a progressive rate, ranging from 10% to 37% for tax year 2026.
There is no single income-tax rate in the U.S. that is applicable to all. There are several factors that determine the price of the individual:
The federal rates for 2026 will be used for income 2026. Income should be reported in general in 2027. The income reported on the returns filed in 2026 is typically for 2025.
In the United States, the “pay as you go” method is employed. Typically, tax is paid when it is earned, either as a withholding from the employer or estimated tax payments, or a combination of withholding from the employer and estimated tax payments. If a taxpayer underpays during the year, he/she could have under-payment penalties as well as tax to pay. If a taxpayer pays more than the final liability, he or she will receive a refund.
Individual income tax is progressive at the Federal level. Taxable Income is broken up into “slabs” or “brackets. The annual tax rate for each layer is the rate for that bracket.
Normally, a person in the 22% bracket does not pay the 22% on each dollar of income. The lower rates (lower 10% and lower 12%) continue to apply to the lower parts.
Income tax is levied on the income of all people all over the country. Some states also have individual income taxes and some cities or local jurisdictions have an extra income tax.
The federal rules are not necessarily followed by state rules. A state may use:
An individual can then have a Federal Income Tax liability even if there’s no state income tax. The opposite is also true: federal tax can be capped on the basis of deductions and/or credits, but state tax is still required.
Note that the federal income tax is not the same as the Social Security and Medicare payroll taxes.
For 2026, an employee generally pays:
The employer ordinarily pays matching Social Security and Medicare amounts. An additional 0.9% Medicare tax can apply above specified income thresholds.
Payroll tax and federal income tax may both appear on a pay statement, but they are calculated under different rules.
Grasping the concept of income tax in the United States is essential in understanding the different types of income, which include gross income, adjusted gross income, and taxable income.
Generally, gross income is net income from any source received in money, property, goods or services and is subject to tax.
Common examples include:
Not all receipts are subject to tax. There can be exceptions for certain gifts, inheritances, qualified benefits, reimbursements and other amounts.
Adjusted gross income (AGI) will typically be gross income minus qualifying adjustment.
A simplified formula is:
Gross income − adjustments to income = adjusted gross income
Possible adjustments can include qualifying amounts relating to:
Limitations and qualifications apply. All retirement contributions or outlays are not allowed as deductions.
The current Form 1040 has the AGI listed on line 11. It is used to calculate a number of deductions, credits and filing calculations.
A simplified calculation is:
Adjusted gross income − standard or itemized deductions − other applicable deductions = taxable income
A taxpayer cannot simply take a look at the gross calculation and equate it with the table and take the resulting tax rate as the ending tax liability.
The following brackets apply to ordinary taxable income for tax year 2026.
| Rate | Single | Married filing jointly or qualifying surviving spouse | Married filing separately | Head of household |
|---|---|---|---|---|
| 10% | $0 to $12,400 | $0 to $24,800 | $0 to $12,400 | $0 to $17,700 |
| 12% | $12,401 to $50,400 | $24,801 to $100,800 | $12,401 to $50,400 | $17,701 to $67,450 |
| 22% | $50,401 to $105,700 | $100,801 to $211,400 | $50,401 to $105,700 | $67,451 to $105,700 |
| 24% | $105,701 to $201,775 | $211,401 to $403,550 | $105,701 to $201,775 | $105,701 to $201,750 |
| 32% | $201,776 to $256,225 | $403,551 to $512,450 | $201,776 to $256,225 | $201,751 to $256,200 |
| 35% | $256,226 to $640,600 | $512,451 to $768,700 | $256,226 to $384,350 | $256,201 to $640,600 |
| 37% | $640,601 or more | $768,701 or more | $384,351 or more | $640,601 or more |
Source: IRS Revenue Procedure 2025-32 and the related IRS tax-year 2026 inflation adjustments.
A marginal tax rate is the rate applied to the highest portion of taxable income.
An effective tax rate is an average rate. One common calculation is:
Federal income tax liability ÷ taxable income × 100
Normally, the effective rate will be lower than the marginal rate because the early stages of income are taxed at lower rates.
To work out an effective rate you should find the denominator. When taxed on gross income, the percentage will be different than when taxed on taxable income.
Assume a taxpayer:
The calculation is:
| Income layer | Calculation | Tax |
| First $12,400 | $12,400 × 10% | $1,240 |
| Next $38,000 | $38,000 × 12% | $4,560 |
| Remaining $39,600 | $39,600 × 22% | $8,712 |
| Estimated tax before credits | $14,512 |
The marginal rate is 22%, but the effective rate based on taxable income is approximately:
$14,512 ÷ $90,000 = 16.1%
This is a simplified example which omits credits, alternate minimum tax, self-employment tax, net investment income tax, Additional Medicare Tax and state & local taxes.
The standard deduction is a specified amount that typically decreases the amount of taxable income. Typically, a taxpayer will either take the standard deduction or itemized deductions.
| Filing status | 2026 standard deduction |
| Single | $16,100 |
| Married filing jointly or qualifying surviving spouse | $32,200 |
| Married filing separately | $16,100 |
| Head of household | $24,150 |
For taxpayers age 65 and over, blind and those who can be claimed on someone else’s tax return, there are additional amounts and special rules.
Whether a person must file depends on more than whether income tax was withheld.
Relevant factors include:
The following thresholds apply to many taxpayers filing 2025 returns during 2026:
| Filing status | Age at end of 2025 | File if gross income was at least |
| Single | Under 65 | $15,750 |
| Single | 65 or older | $17,750 |
| Head of household | Under 65 | $23,625 |
| Head of household | 65 or older | $25,625 |
| Married filing jointly | Both spouses under 65 | $31,500 |
| Married filing jointly | One spouse 65 or older | $33,100 |
| Married filing jointly | Both spouses 65 or older | $34,700 |
| Married filing separately | Any age | $5 |
| Qualifying surviving spouse | Under 65 | $31,500 |
| Qualifying surviving spouse | 65 or older | $33,100 |
These are general thresholds for many U.S. citizens and resident aliens. Dependents and taxpayers with special circumstances use additional rules.
A return may be required below the ordinary threshold.
If, for instance, you are self-employed and make $400 or more in net earnings from self-employment, you will typically be required to complete Schedule SE. There may be other rules that apply to wages of church employees, household employment taxes, taxes on retirement plans, advance premium tax credits and other situations.
A person may benefit from filing even below the normal threshold, particularly when:
The Internal Revenue Service (IRS) recommends that the lower income taxpayers consider filing their tax returns when the IRS will have to send them a refund or withholding credits.
Most individual taxpayers file Form 1040 or Form 1040-SR.
Documents may include:
Not every taxpayer needs every document.
The five filing statuses are:
Filing status can affect:
The head of household filing status (and others that may yield a lower result) should not be chosen just for that reason. There are legal criteria for each status.
Remember to report income from all sources where tax is due even if no form was issued or a wrong or late form was issued.
Examples can include:
Add any adjustments to get AGI. Next, look at the standard deduction and allowable itemized deductions and apply any other deductions that may apply.
The return or tax software applies:
The result is generally an amount owed or an overpayment eligible for refund.
Check:
Returns can generally be:
Electronic filing is normally faster and reduces certain transcription errors.
Individual tax preparation software companies may offer guided tax preparation software for taxpayers who have an AGI of $89,000 or less for 2025. Taxpayers can use IRS Free File for the 2026 filing season.
If you are comfortable doing your own federal tax return, then taxpayers making more than that could be eligible for Free File Fillable Forms. Additionally, there are other free services, such as VITA, TCE and MilTax for eligible individuals.
Income thresholds, providers participating, forms and filing dates may vary from season to season. Do not use a number from a previous year’s filing page, since the IRS has updated the page.
Deductions and Credits are not interchangeable.
A deduction generally reduces income subject to tax.
Examples can include:
A deduction’s tax value depends partly on the taxpayer’s marginal rate.
A tax credit generally reduces calculated tax.
Credits can be:
Examples may include:
A refundable credit can potentially produce a refund after eligible tax has been reduced to zero.
A taxpayer normally claims the standard deduction or itemizes allowable deductions on Schedule A.
Itemizing may be beneficial when allowable itemized expenses exceed the applicable standard deduction. Possible itemized categories include:
Rules and limitations apply to every category.
Employees usually receive Form W-2 showing wages and taxes withheld.
Employers generally withhold:
Withholding for federal income taxes is only a pre-tax payment, not the actual tax. The proceeds withheld can be less or more than the actual liability.
The most significant life changes, such as multiple jobs, marriage, divorce, or major change in credits/deductions can impact the correct amount.
Businesses that are sole proprietorships typically use Schedule C to report their business income and expenses.
The self-employment tax rate is 15.3% (12.4% Social Security and 2.9% Medicare) subject to tax limits and additional tax provisions.
Taxable business or gig income may have to be reported even when:
The general rules governing a deductible business expense are that the expense must meet the tax requirements in addition to being ordinary and necessary for the business.
Possible expenses can include:
It may be necessary for them to make quarterly estimated payments for:
The U.S. system calls for the payment of taxes on the earned income. Form 1040-ES is the most common form to use for estimating payments.
Investment income can include:
The federal rates could be 0%, 15% or 20% depending on the taxpayer’s filing status and taxable income. There are maximum rates for certain collectibles, small-business stock and real-estate gains.
Capital Gains Tax is based on the taxpayer’s income, not just his or her capital gain.
The general rules of federal tax treatment do not depend exclusively on the terms of immigration, but rather on the source of income, the tax residency and the terms of the treaties.
Worldwide income is generally subject to reporting and the general rules apply to the filing statuses and deductions available to citizens, also to resident aliens.
The outcome can change significantly based on provisions of treaties and special residency requirements.
It may be necessary to consider the green-card test, the substantial-presence test, the exempt-individual rules and treaty provisions.
Income tax applies to the entire United States at the federal level, and at the state level varies.
Progressive personal income-tax rates are levied in some states. Some opt for the flat rate, while others fail to have a general tax on ordinary income.
Income is not necessarily taxable only in the employee’s home state when he or she is working remotely. Answers may vary based on residency, employment, employer’s location, reciprocal agreements and state laws.
The April 15, 2026 filing/payment deadline for 2025 federal individual tax returns applies to most calendar-year individual taxpayers.
It doesn’t normally delay the due date for tax payment which falls on April 15.
Certain taxpayers may receive different deadlines because of:
A taxpayer should generally file on time even when unable to pay the full balance.
Possible options include:
A refund may result when:
The general information the taxpayer will likely need is the Social Security number or ITIN, the tax filing status, tax year, and the exact amount the taxpayers expect to receive as a refund.
When checking to confirm a rate table always make sure to check the year listed on the rate table.
Tax brackets typically are not just for salary or revenue, but for taxable income.
The higher marginal rate only applies to the amount of income in that range.
It is possible to receive a taxable income without a Form W-2 or 1099.
Only expenses that are eligible for the business should be deducted.
Typically, deductions decrease taxable income. In most cases, credits will decrease your taxable liability.
Eligibility to file must be legal. It’s not just the number with the smallest number.
Rejection and/or delay can result from incorrect names, Social Security numbers, ITINs, routing numbers, or account numbers.
Typically, an extension does not extend payment period, but rather the filing period.
Refunds typically are overwithholding, estimated withholding or refundable credits. If there is a lot of money back, it could mean that there is a lot of withholding too.
When calculating income tax in the USA, it becomes easier to understand if broken up into steps:
The result is only part due to the federal rates. Many factors may impact the amount, including filing status, deductions, credits, payroll taxes, investment income, self-employment, residency and state rules.
The Internal Revenue Service (IRS) is the agency in charge of administering the federal income tax. 12 states and a few local governments have their own income taxes.
There is no single federal income-tax percentage. The ordinary federal rates for tax year 2026 are 10%, 12%, 22%, 24%, 32%, 35%, and 37%.
Brackets are dependent on filing status. The single filer taxable income threshold for the 10% rate is $12,400 and the 37% rate starts at $640,600. If filing a joint tax return, married couples will be subject to the 10% rate on income up to $24,800 and the 37% rate will kick in when they earn more than $768,700.
Federal brackets typically are used to calculate taxes on taxable income, not gross income. Eligible adjustments and deductions typically are made first prior to calculating taxable income.
AGI” is known as the gross income that has been adjusted for specific adjustments. The standard deduction, itemized deductions and other deductions are subtracted from AGI to determine the amounts of taxable income.
The filing requirements are dependent on gross income, filing status, age, dependent status, self-employment income and unique tax situations.
There may be other filing requirements that will call for a return at a lower threshold.
The majority of individual taxpayers file Form 1040 or Form 1040-SR. Form 1040-NR is used by nonresident aliens that are required to file generally.
A 1099 may include several types of nonwage income, such as income from payment platforms or retirement distributions, interest, dividends or payments received by someone who is an independent contractor.
Usually use Schedule C to report their business income and expenses, and pay self-employment tax on Schedule SE.
A deduction will typically decrease the amount of income that is taxable. There is a possibility of getting some refunds.
A deduction which lowers one’s taxable income will also lower the amount in a higher tax bracket. A credit usually does not increase or decrease taxable income, but helps to lower taxes.
STCGs typically would be taxed at ordinary income-tax rates. The net long-term capital gains can be taxed at 0%, 15% or 20% rate structure.
No. There are variations in treatment state by state. The rates vary from state to state, some have progressive rates, some have a flat rate, and some don’t have a generic individual income tax rate.
IRS Free File is a federal filing program that supplies a guided software program to taxpayers that fulfil a few income and provider requirements.
The deadline to file and pay for most calendar-year taxpayers who file taxes in 2025 was April 15, 2026. If taxpayers have an extension they usually have until October 15, 2026 to file, but doesn’t extend the payment deadline.
Most (direct deposit) IRS issued returns are issued within 21 days of e-filement and a few are reviewed of all complete and accurate e-filed returns.
Check on the IRS’ refund tracker or through an IRS Online Account.
The Installment Agreement Request is form 9465.
Generally, no. An extension is not a time extension to pay the tax, but rather is to allow for the return to be filed later.