Finance calculators

IRS Withholding Calculator

Updated Nov 11, 2026 By Infinity Calculator Formulas Sources
Rate
Tax Year: (estimates based on that year's IRS brackets & standard deduction)
About You
Tell us about your filing situation.
Income
Enter your expected gross income for the year.
Withholding to Date
Enter the federal income tax already withheld plus what you expect for the remainder of the year.
Adjustments to Income
Above-the-line adjustments that reduce your taxable income.
Deductions
Choose the standard deduction or enter itemized deductions: we'll use the larger.
Standard deduction for your situation$0
Credits
Tax credits reduce your tax bill dollar-for-dollar.
Your Withholding Results
Estimated for tax year .
Estimated Refund
$0

Tax Summary

Total Income$0
Adjustments$0
Deduction Used$0
Senior Deduction (65+)$0
Taxable Income$0
Tax Before Credits$0
Total Credits$0
Total Tax Liability$0
Refundable Child Tax Credit$0
Total Withholding (projected)$0
Effective Tax Rate0%

Withholding vs. Tax Liability

Per-Paycheck Suggestion

To roughly break even, withhold per remaining period$0

Introduction

Federal income tax is taken out of your paycheck before you ever see the money.7 This is called withholding. If too much is withheld, you get a refund. If too little is withheld, you owe the IRS when you file your tax return. Either way, it helps to know where you stand before the year ends.

This free IRS Withholding Calculator helps you figure out if you are having the right amount of federal tax taken from your pay. Just enter your income, filing status, deductions, and credits. The tool will estimate your total tax for the year and compare it to what has already been withheld. It then shows you whether you can expect a refund or a balance due and suggests how much to withhold from each remaining paycheck to come out close to even.

Use this calculator any time during the year, especially after a major life change like getting married, having a child, or starting a new job. Checking your withholding now can help you avoid a surprise tax bill or a large refund that could have been in your pocket all along.

How to Use Our IRS Withholding Calculator

Enter your income, tax withholding, and filing details below. The calculator will tell you if you are on track for a refund or if you may owe money at tax time.

Age 65 or Older: Pick "Yes" if you will be 65 or older on the last day of the tax year. You count as 65 on the day before your 65th birthday.8 So if you turn 65 on January 1, pick "Yes" for the year before. This gives you a bigger standard deduction and the senior deduction.

Blind: Pick "Yes" if you are legally blind. This also adds to your standard deduction.

Claiming Dependents: Pick "Yes" if you support a child or other person who qualifies as your dependent. This unlocks the Child Tax Credit and Other Dependents Credit fields.

Claimed as a Dependent: Pick "Yes" if someone else, like a parent, claims you on their tax return. This limits your standard deduction, and you cannot claim dependents of your own.8

Filing Status: Choose the status that fits you: Single, Married Filing Jointly, Married Filing Separately, Head of Household, or Qualifying Surviving Spouse.

Spouse Information: If you file jointly, enter whether your spouse is 65 or older, blind, or claimed as a dependent by someone else.

Annual Wages / Salary: Enter your total gross pay for the year before any taxes or deductions come out. If filing jointly, also enter your spouse's wages.

Other Taxable Income: Enter any other income you expect this year, such as interest, dividends, or freelance pay.

Federal Tax Withheld So Far: Look at your most recent pay stub. Enter the total federal income tax taken out of your pay so far this year.

Tax Withheld Each Remaining Pay Period: Enter the federal tax amount taken from each future paycheck for the rest of the year.

Remaining Pay Periods: Enter how many more paychecks you expect to get this year.

Spouse Withholding (joint returns): If you file jointly, enter the federal tax withheld from your spouse's pay so far, the amount withheld from each of their remaining paychecks, and how many paychecks they have left. Both of your withholding counts toward the refund or amount owed.

Traditional 401(k) / 403(b) Contributions: Enter the total amount you put into a traditional 401(k) or 403(b) plan this year. This money is left out of the wages you pay income tax on.9 That lowers your taxable income.

Deductible IRA / HSA / Student Loan Interest: Enter the deductible part of any IRA or HSA contributions and student loan interest you paid. These also lower your taxable income.

Deduction Method: Pick "Standard" to use the IRS standard deduction or "Itemize" to enter your own total. The calculator will use whichever amount is larger.

Total Itemized Deductions: If you chose to itemize, enter your total. This includes things like mortgage interest, state taxes paid, and charitable donations.

Qualifying Children Under 17: Enter the number of children under age 17 who qualify for the Child Tax Credit. Each child is worth up to $2,200.1 For 2027 it is up to $2,300.6 If the credit is more than your tax, the calculator adds the part that can be refunded to your refund. With three or more children the refundable part can be larger than the calculator shows.

Other Dependents: Enter the number of other dependents who do not qualify for the Child Tax Credit. Each one is worth up to $500.5

Other Tax Credits: Enter any other credits that lower your tax, such as education credits. The calculator takes this amount off your tax but not below zero, so leave out the earned income credit and other refundable credits.

Calculate Button: Press "Calculate" to see your results. You will get your estimated refund or amount owed, a full tax summary, a chart comparing your withholding to your tax bill, and a suggestion for how much to withhold per paycheck to break even.

What Is Federal Tax Withholding?

Every time you get a paycheck, your employer takes out a portion of your pay and sends it to the IRS. This is called federal tax withholding. It is how most workers pay their income taxes throughout the year instead of paying one big bill in April. The amount withheld depends on how much you earn each pay period, how often you are paid, and what you put on your W-4 form, including your filing status.7

Why Your Withholding Amount Matters

If too much money is withheld, you get a refund when you file your tax return. That might sound nice, but it means you gave the government an interest-free loan all year. If too little is withheld, you will owe money at tax time and could face a penalty. The goal is to get your withholding as close to your actual tax bill as possible so you keep more of your money in each paycheck without owing a surprise bill later.

How This Calculator Helps

This IRS withholding calculator estimates your total federal income tax for the year based on your wages, filing status, dependents, deductions, and credits. It then compares that tax bill to how much has already been withheld from your paychecks plus what will be withheld for the rest of the year. The result tells you whether you are on track for a refund or if you might owe money. It also suggests how much you should withhold per remaining pay period to break even.

Key Terms to Know

Filing status is how you identify yourself on your tax return: single, married filing jointly, married filing separately, head of household, or qualifying surviving spouse. Your filing status affects your tax brackets and standard deduction.

Standard deduction is a flat dollar amount the IRS lets you subtract from your income before calculating tax. Most people take the standard deduction. If you are claimed as a dependent by someone else, your standard deduction is limited based on your earned income.

Senior deduction is an extra deduction of up to $6,000 if you are 65 or older, and up to another $6,000 if your spouse is 65 or older and you file jointly.10 It applies to tax years that begin before 2029.10 You can take it whether you take the standard deduction or itemize.8 Each $6,000 shrinks by 6% of modified adjusted gross income over $75,000 ($150,000 on a joint return).10 You need a valid Social Security number, and married people must file a joint return to take it.7 The calculator uses your AGI for the income test and gives no senior deduction on a separate return.

Tax credits directly reduce the amount of tax you owe. The Child Tax Credit gives up to $2,200 per qualifying child under 17.1 For 2027 the amount is $2,300.6 The Credit for Other Dependents gives up to $500 per dependent who does not qualify for the Child Tax Credit.5 These credits phase out at higher income levels.1

Adjusted gross income (AGI) is your total income minus adjustments such as deductible IRA contributions, HSA contributions and student loan interest. Traditional 401(k) contributions are already left out of your taxable wages.9 That lowers your AGI too. Your AGI determines whether you qualify for certain credits and deductions, while your modified adjusted gross income is used for additional eligibility tests.

When to Check Your Withholding

You should check your withholding at least once a year. It is especially important to check after major life changes like getting married, having a baby, buying a home, starting a new job, or getting a raise. Any of these events can change how much tax you owe and whether your current withholding is enough. If you are also self-employed or earn freelance income, you may owe additional self-employment tax on top of the tax withheld from your pay.

Formulas used

Adjusted Gross Income (AGI)
\text{AGI} = (\text{Wages} + \text{Spouse Wages} + \text{Other Income}) - (\text{401k Contributions} + \text{IRA/HSA/Student Loan})
Taxable Income
\text{Taxable Income} = \max(0,\; \text{AGI} - \text{Deduction} - \text{Senior}),\quad \text{Senior} = n_{65} \times \max\left(0,\; 6000 - 6\% \times \max(0,\, \text{AGI} - T_s)\right),\quad T_s = 75000 \text{ or } 150000 \text{ (joint)}
Federal Tax (Marginal Brackets)
\text{Tax} = \sum_{i} r_i \times \max\bigl(0,\; \min(\text{Taxable Income},\, B_{i+1}) - B_i\bigr) \quad \text{for each bracket } [B_i, B_{i+1})
CTC / ODC Phaseout
\text{Credits}_{\text{family}} = \max\!\left(0,\; n_{\text{child}} \times C + n_{\text{other}} \times 500 - 50 \times \left\lceil \frac{\max(0,\, \text{AGI} - T)}{1000} \right\rceil \right), \quad C = 2200 \text{ (2026)}, 2300 \text{ (2027)}
Tax After Credits
\text{Tax After Credits} = \max(0,\; \text{Tax Before Credits} - \text{Total Credits})
Projected Withholding
\text{Projected Withholding} = \text{Withheld So Far} + \text{Per Period} \times \text{Periods Left} + \text{Spouse Withheld So Far} + \text{Spouse Per Period} \times \text{Spouse Periods Left}
Refund or Amount Owed
\Delta = \text{Projected Withholding} + \text{Refundable CTC} - \text{Tax After Credits},\quad \text{Refundable CTC} = \min\left(\text{Unused CTC},\; n_{\text{child}} \times R,\; 15\% \times \max(0,\, \text{Earned Income} - 2500)\right),\quad R = 1700 \text{ (2026)}, 1800 \text{ (2027)}
Suggested Withholding Per Remaining Period
\text{Suggest} = \frac{\max(0,\; \text{Tax After Credits} - \text{Refundable CTC} - \text{Withheld So Far} - \text{Spouse Projected Withholding})}{\text{Periods Left}}

Frequently asked questions

Where do I find how much federal tax has been withheld so far?

Check your most recent pay stub. Look for the line showing federal income tax withheld, often labeled "Federal tax," and use its year-to-date total. That total is the number you enter in the "Federal income tax withheld so far" field.

How do I know how many pay periods are left this year?

Count how many more paychecks you will receive between now and December 31. If you are paid every two weeks, count the remaining biweekly pay dates. If you are paid twice a month, count the remaining semi-monthly pay dates.

What happens if I get a refund that is too large?

A large refund means too much tax was taken from your paychecks all year. That money could have been in your pocket each month instead. Consider filing a new W-4 with your employer to reduce your withholding so you keep more money in each paycheck.

What is a W-4 form and how do I change it?

A W-4 is the form you give your employer that tells them how much federal tax to take from your pay.7 When your situation changes during the year, you can give your employer a new W-4, and your employer should have copies of the form.7 If the change is for the current year, your employer must start using it no later than the start of the first payroll period ending on or after the 30th day after you hand it in.7

What is the difference between standard and itemized deductions?

The standard deduction is a fixed amount set by the IRS based on your filing status. Itemized deductions are specific expenses you list, like mortgage interest and charitable donations. The calculator uses whichever amount is larger to lower your tax.

What does it mean to be claimed as a dependent?

It means another taxpayer, such as a parent, lists you on their tax return as someone they support. If you are claimed as a dependent, you cannot claim dependents of your own.8 Your standard deduction is limited, but the extra amount for being 65 or older or blind is added on top of the limit.7 For 2026 the limit is generally the greater of $1,350 or your earned income plus $450.2 For 2027 it is the greater of $1,400 or your earned income plus $500.6

What is the Child Tax Credit?

The Child Tax Credit gives you up to $2,200 for each qualifying child under age 17.1 For 2027 the amount is $2,300.6 The child needs a Social Security number that is valid for work and issued by the due date of your return. You need one too, though on a joint return only one of you does.1 A child without one may still count for the Credit for Other Dependents if the child has another taxpayer ID number by that date.1 The credit first reduces the tax you owe. When it is more than your tax, up to $1,700 per child can be paid to you as a refund for 2026.2 For 2027 the figure is $1,800.6 The refundable part is also limited to 15% of your earned income over $2,500.1 The credit starts to phase out when your income goes above $200,000 ($400,000 if married filing jointly).1

What is the Credit for Other Dependents?

This credit gives you up to $500 for each dependent who does not qualify for the Child Tax Credit.5 This can include older children, aging parents, or other qualifying relatives.8 It phases out at the same income levels as the Child Tax Credit.5

What does CTC phaseout mean?

When your income goes above a certain level, the Child Tax Credit and Credit for Other Dependents start to shrink. The IRS reduces your combined credit by $50 for every $1,000, or part of $1,000, of modified adjusted gross income above the threshold.5 This is called a phaseout.

Can I claim the Child Tax Credit if I file Married Filing Separately?

Yes. Married filing separately filers can claim the Child Tax Credit. The credit begins to phase out at $200,000 of modified adjusted gross income for every filing status other than married filing jointly, where the threshold is $400,000.1

How do 401(k) contributions affect my taxes?

Money you put into a traditional 401(k) or 403(b) is left out of the wages you pay income tax on.9 This lowers your taxable income and reduces the tax you owe. Roth 401(k) contributions do not reduce your taxable income because they are included in your income when you make them.9

What is the effective tax rate shown in the results?

Your effective tax rate is the percentage of your total income that goes to federal income tax after all deductions and credits. It is calculated by dividing your total tax liability by your total income. It is usually much lower than your top tax bracket.

Is there a penalty if I do not withhold enough tax?

Yes. Generally, the IRS may charge an underpayment penalty if you owe $1,000 or more in tax after subtracting your withholding and refundable credits, and you did not pay at least 90% of your current year tax or 100% of your prior year tax through withholding or estimated payments.3 If your adjusted gross income for the prior year was more than $150,000 ($75,000 if married filing separately), the prior-year figure is 110%.7

What if I have freelance or self-employment income?

Enter your freelance income in the "Other taxable income" field. Keep in mind this calculator does not estimate self-employment tax (the extra 15.3% for Social Security and Medicare).4 You may also need to make quarterly estimated tax payments to the IRS.

Sources

  1. Instructions for Schedule 8812, Credits for Qualifying Children and Other Dependents. Internal Revenue Service. Accessed September 11, 2026.
  2. Revenue Procedure 2025-32. Internal Revenue Service. 2025;section 3.14(2). Accessed September 11, 2026.
  3. Topic no. 306, Penalty for underpayment of estimated tax. Internal Revenue Service. Accessed September 11, 2026.
  4. Self-employment tax (Social Security and Medicare taxes). Internal Revenue Service. Accessed September 11, 2026.
  5. 26 U.S. Code § 24 - Child tax credit. Legal Information Institute, Cornell Law School. § 24(b). Accessed September 11, 2026.
  6. Revenue Procedure 2026-35. Internal Revenue Service. 2026;sections 3.01, 3.05 and 3.15. Accessed November 9, 2026.
  7. Publication 505 (2026), Tax Withholding and Estimated Tax. Internal Revenue Service. 2026;Introduction, Form W-4, Higher Income Taxpayers. Accessed November 11, 2026.
  8. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information. Internal Revenue Service. 2025;Dependents, Standard Deduction for Age (65 or Older). Accessed November 11, 2026.
  9. Publication 525 (2025), Taxable and Nontaxable Income. Internal Revenue Service. 2025;Elective deferrals, Designated Roth contributions. Accessed November 11, 2026.
  10. 26 U.S. Code § 151 - Allowance of deductions for personal exemptions. Legal Information Institute, Cornell Law School. (d)(5)(C). Accessed November 11, 2026.

Related Finance calculators

All Finance calculators
Finance

HST Calculator

Calculate HST, GST and PST for all 10 Canadian provinces and 3 territories, before or after tax, and estimate Quick Method remittance for business sales.

Open Finance

Land Transfer Tax Calculator

Calculate Ontario provincial and Toronto municipal land transfer tax. Apply first-time buyer rebates. Reverse mode finds implied price from a target tax.

Open Finance

PAYE Calculator

Calculate NZ take-home pay from gross income. Covers PAYE tax bands, ACC earner levy, KiwiSaver rates, student loan repayments, secondary tax codes, and overtime.

Open Finance

PAYG Calculator

Calculate PAYG tax for 2022-23 to 2026-27. Includes Medicare Levy, HECS/HELP, salary packaging, super, and net-to-gross reverse. Multi-period breakdowns.

Open Finance

Stamp Duty Calculator

Estimate UK SDLT for first time buyers, movers, and additional properties. Compare pre and post April 2025 rates with band breakdowns and bar charts.

Open Finance

Tax Calculator

Estimate federal and state taxes for 2023 to 2027. Enter W-2 wages, 1099 income, deductions, and credits. See bracket breakdown, refund, and take-home pay.

Open Finance

Tax Withholding Calculator

Estimate your federal tax, projected refund or balance owed, and per-paycheck W-4 adjustment. Covers all filing statuses, CTC phase-outs, care credits, and bracket-by-bracket detail.

Open Finance

VAT Calculator

Calculate net price, VAT amount, and gross price with an adjustable rate slider and preset rates. Add or remove VAT in one click. Donut chart breakdown.

Open