Tax Refund Calculator: Estimate Your Federal Tax Return

A tax refund calculator compares the federal tax you owe for the year with what you already paid through withholding and estimated payments, plus any refundable credits. Enter your filing status, wages, the federal tax withheld (W-2 box 2) and your children. The estimator then works through a Form 1040 the way the IRS does, from total income to adjusted gross income, taxable income, tax, credits and payments, and shows your refund or amount owed.

The short answer: your refund = total payments + refundable credits − total tax. On the 2025 Form 1040 that is line 33 (withholding, estimated payments, the earned income credit, the additional child tax credit and other refundable credits) minus line 24 (income tax after credits, plus self-employment and other taxes). Take a single filer with $50,000 of wages and $5,500 withheld in 2026: total tax is $3,820, so the refund is $1,680.

Which calculator do I need? This page estimates the refund on a full-year return. To change what comes out of each paycheck, use the tax withholding calculator. If you already know your taxable income and only want the tax on it, use the federal tax bracket calculator. For net pay per paycheck, use the paycheck after tax calculator.

The calculator is for informational purposes only. Its results are estimates, and it makes no guarantee of accuracy. Your actual refund is whatever your filed return and the IRS's processing produce. It covers the federal return only. State refunds are figured on a separate state return. California filers can use the California income tax calculator.

Example tax refunds for 2026

Every row below comes from the calculator with 2026 figures from IRS Revenue Procedure 2025-32: standard deduction, tax brackets, child tax credit and EITC. Each row assumes W-2 wages only, the standard deduction and no other income, unless the row says otherwise.

"Total tax" is line 24, after nonrefundable credits such as the child tax credit. "Credits paid out" are the refundable credits that count as payments. The same wages can produce very different refunds. What changes the result is how much was withheld and which credits you qualify for, more than the size of the paycheck.

How the calculator works, line by line

It follows the line order of Form 1040 and its schedules. Line numbers are those of the 2025 form.

1. Total income (line 9). Wages from W-2 box 1, taxable interest, ordinary dividends, net capital gain or loss, self-employment profit and other taxable income. A net capital loss is deductible up to $3,000 ($1,500 if married filing separately). The rest carries over to next year.
2. Adjustments (Schedule 1, line 26). Half of your self-employment tax, deductible HSA contributions made outside payroll, deductible traditional IRA contributions, up to $2,500 of student loan interest, and any other adjustments you enter. The IRA deduction phases out if you or your spouse are covered by a workplace plan. For 2026 the single range is $81,000 to $91,000 (IRS Notice 2025-67). Student loan interest phases out from $85,000 to $100,000 single and from $175,000 to $205,000 joint (Rev. Proc. 2025-32 §4.29).
3. Adjusted gross income (line 11a, carried to line 11b). Total income minus adjustments. AGI drives the phase-outs for the EITC, the child tax credit and the new Schedule 1-A deductions.
4. Deductions (lines 12e to 14). The larger of the standard deduction and your itemized total, the qualified business income deduction on self-employment profit, and the four Schedule 1-A deductions: qualified tips, qualified overtime, car loan interest and the senior deduction. You get the Schedule 1-A deductions whether or not you itemize.
5. Tax (line 16). The 2026 rate schedule applies to ordinary income. Qualified dividends and net long-term capital gains are stacked on top at 0%, 15% or 20%, following the Qualified Dividends and Capital Gain Tax Worksheet.
6. Nonrefundable credits (lines 19 to 22). Any other credits you enter go first. The child tax credit and credit for other dependents then reduce the remaining tax, but never below zero.
7. Other taxes (line 23). Self-employment tax, the 0.9% Additional Medicare Tax on wages and self-employment income above $200,000 ($250,000 joint), and the 3.8% net investment income tax above the same thresholds.
8. Payments (lines 25 to 33). Withholding, estimated payments, the earned income credit and the refundable part of the child tax credit. Additional Medicare Tax withheld by your employer also counts as withholding (Form 8959 line 24, reported on line 25c).
9. Refund or amount owed (line 34 or 37). Payments minus total tax.

2026 figures the calculator uses

You can also pick 2025 for a late or amended return. The calculator then switches to the 2025 brackets and a $15,750 single standard deduction. For the full list of 2026 changes, see the 2026 IRS inflation adjustments guide.

Worked example: married couple with two children

A married couple filing jointly earns $90,000 in W-2 wages in 2026, has $6,000 of federal income tax withheld, and has two children under 17.

• Adjusted gross income: $90,000 (no adjustments).
• Standard deduction: $32,200, so taxable income is $90,000 − $32,200 = $57,800.
• Tax: 10% of the first $24,800 = $2,480, plus 12% of the next $33,000 = $3,960, for a total of $6,440.
• Child tax credit: 2 × $2,200 = $4,400. Their AGI is far below the $400,000 joint phase-out threshold in IRC §24, so the full credit applies. Tax after credits: $6,440 − $4,400 = $2,040.
• Earned income credit: none. Two-child EITC phases out completely at $65,899 of joint income.
• Refund: $6,000 withheld − $2,040 total tax = $3,960.

Worked example: head of household with one child

A single parent filing as head of household earns $35,000 in 2026, has $1,500 withheld, and has one qualifying child under 17.

• Taxable income: $35,000 − $24,150 = $10,850. Tax at 10% = $1,085.
• Child tax credit: $2,200 is allowed, but only $1,085 can be used against the tax. The unused $1,115 can come back as the additional child tax credit. It is capped at $1,700 per child and at 15% of earned income above $2,500, here 15% × $32,500 = $4,875, so all $1,115 is refundable (Schedule 8812 instructions).
• Earned income credit: the one-child credit reaches its $4,427 maximum and then shrinks as income rises above $23,890. At $35,000 the credit is $4,427 − ($35,000 − $23,890) × 15.98% ≈ $2,652. The IRS EIC Table works in $50 income bands, so the return may show a few dollars more or less.
• Refund: $1,500 + $1,115 + $2,652 = $5,267. Most of it comes from refundable credits, not from withholding.

Why refunds change from year to year

A refund measures how far your payments overshot your tax. It does not measure how much tax you paid. Either side of the equation can move:

• Withholding changed. A new job, a raise, a second job or a new Form W-4 changes what comes out of each paycheck. Two jobs that each withhold as if they were your only job often under-withhold, because each employer applies the lower brackets. The IRS Tax Withholding Estimator and our withholding calculator help you set it.
• A credit changed. The year a child turns 17, that child moves from the $2,200 child tax credit to the $500 credit for other dependents, and that $500 is never refundable. The EITC changes fast with income in its phase-in and phase-out ranges. Check yours with the EITC calculator and the child tax credit calculator.
• New deductions under the One Big Beautiful Bill Act (Pub. L. 119-21). Tax years 2025 through 2028 add the no tax on tips deduction (up to $25,000), the no tax on overtime deduction (up to $12,500, or $25,000 joint), the car loan interest deduction (up to $10,000), and the $6,000 senior deduction for each person 65 or older. All four are claimed on Schedule 1-A at filing time. If your withholding was not reduced during the year, the tax they save shows up in the refund.
• Untaxed income. Self-employment profit, interest, dividends, capital gains and unemployment benefits usually have little or no withholding. $10,000 of side-gig profit adds roughly $1,413 of self-employment tax (15.3% of 92.35%), plus income tax at your bracket.
• Inflation adjustments. Brackets and the standard deduction rise each year. For a single filer with the same $50,000 of wages, taxable income falls from $34,250 in 2025 to $33,900 in 2026, which lowers the tax by $51.50.

When will I get my refund?

According to the IRS refunds page, most refunds on e-filed returns arrive within 3 weeks of filing. A paper return takes 6 weeks or more from the date the IRS receives it. The Where's My Refund tool on that page shows a status 24 hours after you e-file a current-year return, 3 days after you e-file a prior-year return, and 4 weeks after you mail a paper return.

Three things slow refunds down:

• EITC or additional child tax credit. IRC §6402(m) bars the IRS from issuing these refunds before February 15 of the year after the tax year, even if you file in January. The calculator flags this when your estimate includes either credit.
• Paper refunds. In IR-2025-94, the IRS announced it would begin phasing out paper refund checks on September 30, 2025, under Executive Order 14247. It says an e-filed return with direct deposit can be refunded in less than 21 days, while mailed paper refunds may take 6 weeks or longer. Enter your bank routing and account numbers on lines 35b to 35d.
• Errors and identity checks. A mismatch between your return and the W-2s and 1099s the IRS has on file, or an identity-verification letter, holds the refund until it is resolved.

The 2026 return is due April 15, 2027. Filing early does not make the refund any bigger. It only gets you the money sooner.

What to do if you owe

If the calculator shows a balance due, the Form 1040 puts it on line 37. IRS.gov/payments lists the ways to pay. A bank payment through your IRS online account or IRS Direct Pay is free. Debit cards, credit cards and digital wallets go through a card processor, which charges a fee. You can also pay by check, money order or cash.

If you can't pay everything by the deadline, file on time anyway. The failure-to-file penalty is 5% of the unpaid tax for each month or part of a month the return is late, up to 25%. The failure-to-pay penalty is 0.5% a month. Pay what you can, then ask for a plan. The IRS payment plans page lists two options:

Interest and some penalties keep accruing until the balance is paid in full. The IRS's first-time penalty relief can remove some penalties if your record is clean.

Will I owe an underpayment penalty?

Owing money at filing is not a penalty in itself. The estimated tax penalty on Form 2210 applies only when withholding and timely estimated payments fell short during the year. Under IRC §6654 and IRS Tax Topic 306, you owe no penalty if any of these is true:

• The balance due after withholding and refundable credits is less than $1,000.
• You paid at least 90% of this year's tax.
• You paid at least 100% of last year's tax, or 110% if last year's AGI was over $150,000 ($75,000 married filing separately).

Withholding counts as if it were paid evenly through the year, whenever it actually came out of your pay, unless you elect on Form 2210 to use the dates it was actually withheld (§6654(g)(1)). Estimated payments count on the date you make them. The 2026 due dates are April 15, June 15 and September 15, 2026, and January 15, 2027. To stop owing next year, raise your withholding on a new W-4 or set up quarterly estimated payments.

What the calculator does not cover

To keep the inputs short, a few rules are simplified or left out. Check them if they apply to you:

• Alternative minimum tax, the 28% collectibles rate and unrecaptured §1250 gain. Use the AMT calculator if you have large incentive stock option exercises or similar preference items.
• The Tax Table. The IRS Tax Table, used when taxable income is under $100,000, figures tax on the midpoint of each $50 income band ($25 bands under $3,000). The calculator uses the exact rate schedule, so results can differ by a few dollars.
• Taxable Social Security. Enter the taxable part as other income, or figure it first with the taxable Social Security calculator.
• Self-employment details. The calculator treats self-employment profit as a non-service business with no employees for the QBI deduction, and it does not cap tips at business profit.
• Credits it does not compute. Education, child and dependent care, saver's and energy credits are not figured for you. Enter their total as other nonrefundable credits. The calculator also leaves out the premium tax credit and the Schedule 8812 alternative for three or more children.
• Additional Medicare Tax withholding. An employer withholds the 0.9% only on what it pays you above $200,000, and it ignores your spouse's wages (IRC §3102(f)). If your wages are over $200,000, enter the amount actually withheld: W-2 box 6 minus 1.45% of box 5. If you leave it blank, a joint return counts no such withholding. Any other return counts 0.9% of wages over $200,000, which assumes one employer paid all of them.
• Age 65. The IRS treats you as 65 on the day before your 65th birthday. For 2026, count yourself 65 if you were born before January 2, 1962. For 2025, the date is January 2, 1961, the date the 2025 Form 1040 instructions use.
• EITC eligibility. The calculator checks the 25-to-64 age test for filers without a qualifying child (IRC §32(c)) and the $12,200 investment income limit for 2026. It assumes you meet the residency, Social Security number and relationship tests.

If you want to rebuild the math in a spreadsheet, how to calculate taxes in Excel walks through the bracket formulas. For the rules themselves, the primary sources are IRC §1 (rates), §63 (standard deduction), §151 (senior deduction), §1401 (self-employment tax) and the Form 1040 instructions.