W-4 Calculator 2026: Free Withholding and Paycheck Checkup Tool
Enter your latest pay stub to see whether your current withholding will cover your 2026 tax bill - and get an estimated Step 4(c) adjustment. The estimate assumes your current pay continues for the whole year; it does not use year-to-date withholding. Includes OBBBA deductions for tips, overtime, and seniors.
Paycheck Information
Step 1, Pay Stub Details
From your pay stub - federal income tax line only
Step 2, W-4 Credits & Adjustments
Each child = $2,200 credit (OBBBA); credits phase out above $200,000 ($400,000 MFJ)
Each = $500 credit
Increases your standard deduction - $2,050/condition (single/HOH) or $1,650/condition (MFJ/MFS)
Spouse or second-job wages, pension, interest, dividends. On the W-4 itself, other jobs go in Step 2; only income not from jobs goes in Step 4(a)
Total itemized deductions, including charitable gifts, if you itemize (leave 0 if you take the standard deduction)
401(k)/403(b) contributions and pre-tax health, HSA or FSA deductions taken from the gross pay above. Leave 0 if your gross pay figure already excludes them
Tips in an IRS-listed tipped occupation. Deduction up to $25,000 for every eligible filing status; not allowed if married filing separately
Premium only (the 0.5x of 1.5x). Deduction up to $12,500, or $25,000 if married filing jointly; not allowed if married filing separately
Loan for a new, U.S.-assembled personal vehicle taken out after 2024. Deduction up to $10,000
Senior Deduction
Calculated from the age 65 boxes above: $6,000 per person age 65 or older, both spouses only if married filing jointly; not allowed if married filing separately
New for 2026. If you take the standard deduction, up to $1,000 of cash gifts to qualifying charities ($2,000 married filing jointly) is deductible. Not donor-advised funds. If you itemize, include charity in Extra Deductions instead
Income phase-outs are applied automatically, using your total income after pre-tax payroll deductions as an estimate of modified AGI: tips and overtime above $150,000 ($300,000 married filing jointly), car loan interest above $100,000 ($200,000), and the senior deduction above $75,000 ($150,000).
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Enter your pay stub data and click Run Paycheck Checkup to see results.
Annual Gross Income
-
Est. Taxable Income
-
Est. Federal Tax
-
Withholding Gap
-
Annual gross (this job)
+ Other annual income
− Pre-tax payroll deductions
Total income
Less: Deduction (standard or itemized)
Less: cash charity (non-itemizer, 2026)
Less: Schedule 1-A deductions
Taxable income
Federal income tax (2026 brackets)
Less: Dependent credits (Step 3)
Net estimated tax liability
Projected annual withholding
Withholding gap (over/under)
Schedule 1-A:
Estimates use 2026 tax brackets and standard deductions per IRS Rev. Proc. 2025-32 and IR-2025-103. Federal income tax only - excludes FICA, state taxes, and most other credits. Schedule 1-A deductions use the statutory caps, filing-status rules and phase-outs, with your total income after pre-tax payroll deductions standing in for modified AGI. For exact guidance, use the IRS Tax Withholding Estimator at irs.gov.
Want the full rules, examples, edge cases, and planning context behind this calculation? Read the companion guide.
Your W-4 determines how much federal income tax your employer withholds from each paycheck. The 2026 standard deduction is $16,100 for single filers and $32,200 for married filing jointly - both increased under the One Big Beautiful Bill Act and inflation adjustment. If you qualify for OBBBA deductions (tips, overtime, senior bonus, or auto loan interest), your actual tax liability is lower than your withholding tables assumed, which means you may be over-withholding without knowing it.
Key Takeaways
The 2026 standard deduction increased to $16,100 (single) and $32,200 (MFJ) per IRS Rev. Proc. 2025-32.
OBBBA Schedule 1-A deductions (tips, overtime, senior bonus, auto loan) are below-the-line: they reduce taxable income, not AGI, and lower optimal withholding.
The current W-4 (2020 and later) uses dollar amounts for credits - not allowances. Multiply qualifying children under 17 by $2,200 and enter in Step 3.
If you have a second job or your spouse works, complete Step 2 (estimator, Multiple Jobs Worksheet, or the two-jobs checkbox) to avoid year-end underpayment, and complete Steps 3 through 4(b) on only one W-4.
Step 4c lets you add a flat dollar amount to every paycheck's withholding - useful for self-employment income or investment income.
Bonuses and other supplemental wages follow separate IRS withholding rules (flat 22 percent under Pub 15 section 7). Use the Bonus Tax Calculator for one-off supplemental payments and our Bonus Tax Withholding Guide for the full framework.
If you receive RSUs (restricted stock units), the same 22 percent supplemental rate applies at vest under IRC §83(a) and almost always under-withholds for senior earners. Use the RSU Tax Calculator to size the sell-to-cover share count and the marginal-rate shortfall, then use Step 4(c) here to spread the additional federal tax across remaining paychecks.
If you pay for daycare or use a Dependent Care FSA, Step 4b (deductions) should reflect your pre-tax FSA contribution. Run the Child Care Tax Benefit Calculator to size the new $7,500 OBBBA FSA against the CDCTC before adjusting your W-4.
This tool performs a 5-minute paycheck checkup using your most recent pay stub. You do not need to gather tax returns or complex documents - just the pay stub from your last paycheck and your current W-4 elections.
Enter gross pay and current withholding from your pay stub. Use the "Federal Income Tax" line - not state tax or FICA.
Select your pay frequency (biweekly is most common). This converts your per-period data to annual projections.
Enter dependents to match what you claimed on Step 3 of your W-4. Qualifying children under 17 count as $2,200 each; other dependents count as $500 each under current law.
Add other income and deductions only if relevant. Leave blank if all your income comes from this one job.
Enter Schedule 1-A amounts if you qualify: annual qualified tips, overtime premium and car loan interest. The calculator applies the caps, filing-status rules and income phase-outs, and works out the senior deduction from the age 65 boxes.
The calculator estimates your 2026 federal income tax liability using current IRS bracket schedules, compares it to your projected annual withholding, and tells you whether to add Step 4c withholding or adjust Step 3. It is an annual tax estimate, not a copy of the Form W-4 worksheets: the official Step 4(b) Deductions Worksheet uses simplified income cutoffs for these deductions, while this calculator applies the full Schedule 1-A phase-outs, so the two figures can differ for higher earners.
W-4 Step-by-Step Instructions
The current W-4 (redesigned in 2020) has five steps. Most people only need to complete Steps 1 and 5. Steps 2 through 4 are only for specific situations.
Step 1 - Personal Information
Enter your name, address, SSN, and filing status. Your filing status determines which withholding table your employer uses. Single withholding applies the most conservative (highest) rates; MFJ applies wider brackets. If you choose MFJ here but later file as MFS, you may have under-withheld.
Step 2 - Multiple Jobs or Spouse Works
Step 2 is for households with more than one job at the same time (two jobs, or both spouses working). On the 2026 Form W-4 you choose one of three options: (a) the IRS Tax Withholding Estimator, (b) the Multiple Jobs Worksheet, with the result entered in Step 4(c), or (c) checking the box on the W-4 for each of the two jobs. The checkbox is generally more accurate than the worksheet only when the lower-paying job pays more than half of what the higher-paying job pays; otherwise the worksheet is more accurate. Complete Steps 3 through 4(b) on only one W-4, ideally for the highest-paying job.
Step 3 - Claim Dependents
For 2026: multiply qualifying children under age 17 by $2,200 and other dependents by $500. Enter the total here. This reduces your withholding by spreading your expected credits across pay periods. If your income exceeds $200,000 (single) or $400,000 (joint), the child tax credit phases out at $50 per $1,000 over the threshold and you should reduce your Step 3 amount accordingly.
Step 4 - Other Adjustments
Step 4(a): Add income not from jobs that has no withholding, such as interest, dividends and retirement income (wages from other jobs belong in Step 2, not here). Step 4b: Add deductions beyond the standard deduction that you plan to itemize. Step 4c: Enter a flat dollar amount to add to every paycheck's withholding - the most direct way to prevent underpayment from any source.
Step 5 - Sign and Date
A W-4 is invalid without your signature. Submit to your employer's payroll department. It takes effect for the next pay period after submission and cannot be backdated.
OBBBA Impact on Your W-4 Withholding
The One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025) created several below-the-line deductions, reported on Schedule 1-A, for tax years 2025 through 2028. They reduce taxable income, not AGI, and the IRS payroll withholding tables do not automatically account for them - meaning you may be over-withholding if you qualify.
Qualified Tips Deduction
Eligible tipped workers in qualifying occupations can deduct up to $25,000 of qualified tips per return. The cap is the same for every eligible filing status, but married taxpayers must file jointly to claim it. The deduction is reduced by $100 for each full $1,000 of modified AGI above $150,000 ($300,000 married filing jointly). On the 2026 Form W-4, qualified tips go on line 1a of the Step 4(b) Deductions Worksheet, which reduces withholding. Use the No Tax on Tips Calculator to estimate your deduction.
Overtime Premium Deduction
The deductible amount is the overtime premium only - the extra 0.5x portion of time-and-a-half pay. For a $30/hour worker, the premium on each overtime hour is $15 (not the full $45). The deduction is capped at $12,500, or $25,000 on a joint return; married taxpayers must file jointly to claim it, and the phase-out matches the tips deduction. See the No Tax on Overtime Calculator.
Senior Bonus Deduction
Taxpayers age 65 and older may claim an additional $6,000 deduction per eligible person (a below-the-line Schedule 1-A deduction, available to both standard deduction takers and itemizers). For MFJ filers where both spouses are 65+, the maximum is $12,000. Phase-out begins at $75,000 MAGI (single) and $150,000 (MFJ). MFS filers do not qualify. The calculator works this out from the age 65 boxes. See the Senior Deduction Calculator.
Auto Loan Interest Deduction
Interest paid on qualifying new vehicle loans is deductible up to $10,000. The vehicle must be new, U.S.-finally assembled, and purchased after December 31, 2024. Leases do not qualify. The deduction is reduced by $200 for each $1,000 (or part of $1,000) of modified AGI above $100,000 ($200,000 married filing jointly). See the Auto Loan Interest Calculator.
Cash Charity Deduction for Non-Itemizers (2026)
Starting in 2026, taxpayers who take the standard deduction can also deduct up to $1,000 of cash gifts to qualifying charities, or $2,000 on a joint return (IRC §170(p)). Gifts to donor-advised funds do not count. If you itemize, your charitable gifts are part of your itemized deductions instead, so the calculator uses whichever is larger: your itemized total, or the standard deduction plus the capped charity amount. It appears on line 12 of the 2026 Step 4(b) Deductions Worksheet. See the Charitable Contribution Deduction Calculator.
To reflect these deductions on your W-4, complete the Step 4(b) Deductions Worksheet and enter the result in Step 4(b). This reduces withholding by dividing the deduction across your remaining pay periods.
2026 W-4 Quick Reference
2026 Key Withholding Parameters
Parameter
Single / MFS
MFJ / QSS
Head of Household
Standard Deduction
$16,100
$32,200
$24,150
Age 65+ or Blind Add-On
$2,050 each (Single); $1,650 each (MFS)
$1,650 each
$2,050 each
10% Bracket
$0-$12,400
$0-$24,800
$0-$17,700
12% Bracket
$12,400-$50,400
$24,800-$100,800
$17,700-$67,450
22% Bracket
$50,400-$105,700
$100,800-$211,400
$67,450-$105,700
24% Bracket
$105,700-$201,775
$211,400-$403,550
$105,700-$201,750
32% Bracket
$201,775-$256,225
$403,550-$512,450
$201,750-$256,200
35% Bracket
$256,225-$640,600 (MFS: $256,225-$384,350)
$512,450-$768,700
$256,200-$640,600
37% Bracket
Over $640,600 (MFS: over $384,350)
Over $768,700
Over $640,600
Qualifying Child Credit (Step 3)
$2,200 per child under 17 (OBBBA)
Other Dependent Credit (Step 3)
$500 per other qualifying dependent
Sources: IRS Rev. Proc. 2025-32 (IR-2025-103) for standard deductions and all brackets, including Head of Household (Table 2). The Single and MFS columns share brackets up to 35%; the MFS 37% bracket starts at $384,350.
Real-World Scenarios
Scenario 1 - Single teacher, biweekly, no OBBBA deductions
Gross pay per period$2,500 biweekly
Annual gross income$65,000
Standard deduction (single)($16,100)
Taxable income$48,900
Federal income tax (2026)$5,620
No dependents$0
Net estimated tax$5,620
Current withholding at $220/period$5,720
Withholding gap+$100 (slight over-withholding)
RecommendationWithin $500 of the estimated tax: no W-4 change needed
Scenario 2 - MFJ household, both work, $25K tips deduction
RecommendationEnter the $25,000 of tips on line 1a of the Step 4(b) Deductions Worksheet on one W-4 (the highest-paying job), and handle the spouse's job in Step 2, not Step 4(a)
Scenario 3 - Single age 67, retired, part-time wages + senior deduction
Gross pay (monthly part-time)$1,800/month
Annual gross income$21,600
Standard deduction (single) + age 65 add-on($18,150)
Senior deduction (Schedule 1-A)($6,000) - full amount; income is far below the $75,000 phase-out
Taxable income$0
Federal income tax$0
Current withholding at $80/month$960
Withholding gap+$960 (all withholding is over-withheld)
RecommendationClaim exemption only if there was no federal income tax liability last year and none is expected this year; otherwise reduce withholding
W-4 for Two Jobs or Married Both Working
The most common withholding mistake is failing to account for multiple income sources. The federal withholding tables assume each job is the household's only income source. If you have two jobs - or you and your spouse both work - each employer withholds too little because neither sees the combined income that pushes you into higher brackets.
Three ways to fix this:
Step 2(c) checkbox: If there are only two jobs, check the box on both W-4s. Each employer then uses withholding tables built for two-earner households. It is generally the more accurate choice only when the lower-paying job pays more than half of the higher-paying one.
Step 2(b) Multiple Jobs Worksheet: Works out an extra per-paycheck amount from both jobs' pay and puts it in Step 4(c) of the highest-paying job's W-4. More accurate than the checkbox when the two jobs' pay differs a lot. The IRS Tax Withholding Estimator, Step 2(a), is the most precise option.
Step 4c: Calculate the shortfall using this tool and add a flat dollar amount per pay period. The most precise option if you are already using Step 4b for deductions.
The clients who owe the most at filing are almost always dual-income couples who each submitted a standard W-4 without Step 2 completed. Neither payroll system knows about the other job. Each withholds as if the person makes, say, $60,000 per year - but the combined income is $120,000, which is a full tax bracket higher. The gap between what was withheld and what is owed can easily reach $2,000 to $4,000 for a middle-income couple. The fix takes 5 minutes with a pay stub and this calculator.
Common W-4 Mistakes That Cost You Money
Leaving Step 2 blank when both spouses work - causes systematic under-withholding across all pay periods.
Claiming OBBBA deductions you don't qualify for - if you enter a large tips or overtime deduction that the IRS later disallows, you'll owe the under-withheld tax plus possible penalties.
Using an old pre-2020 W-4 "allowance" approach to estimate Step 3 - the current form uses dollar amounts, not allowances; the two systems do not translate directly.
Not updating your W-4 after a major life event (marriage, new child, divorce, job change) - your old elections may no longer match your current situation.
Entering your spouse's income in Step 3 or Step 4(a) - Step 3 is only for dependent credits, and Step 4(a) is for income not from jobs. A spouse's job is handled in Step 2.
Filing MFS on your tax return when you told your employer Single on your W-4 - the brackets differ. MFS has the same bracket widths as single, so this usually has minimal impact, but it can cause issues if you also claimed MFJ-specific credits during the year.
When to Submit a New W-4
Next Steps
Submit a new W-4 any time your projected withholding gap (from this calculator) exceeds $500 in either direction, or any time a life event changes your credits or deductions: marriage, divorce, birth of a child, a dependent turning 17 (losing the $2,200 credit), starting or ending a second job, or qualifying for a new OBBBA deduction. If you will owe tax at filing, add Step 4c extra withholding in small increments - even $25 per pay period over a full year eliminates a $650 underpayment. If you are significantly over-withholding, increase your Step 3 claim or add the applicable OBBBA amounts to Step 4b. Combine this paycheck checkup with the W-4 Instructions Guide for a step-by-step walkthrough of completing the form. If you are also adjusting your estimated quarterly payments because you have 1099 income, the Quarterly Tax Calculator covers that calculation separately.
Form W-4 tells your employer how much federal income tax to withhold from each paycheck. The amount withheld is sent to the IRS as a prepayment toward your annual tax bill. If you withhold too little, you owe taxes plus possible underpayment penalties at filing. If you withhold too much, you get a refund but gave the government an interest-free loan. The goal is to withhold approximately the right amount so your bill or refund is close to zero.
Update your W-4 any time your tax situation changes significantly: marriage, divorce, birth of a child, a second job starting or ending, a major income change, or qualifying for a new OBBBA deduction. The IRS recommends a paycheck checkup early each year, especially after major tax legislation. For 2026, OBBBA deductions and the updated standard deduction are the most common reasons to revisit W-4 elections.
For 2026, multiply qualifying children under age 17 by $2,200 and other qualifying dependents by $500. Add both amounts and enter the total on Step 3. This reduces withholding by spreading your expected credits across remaining pay periods. If your income exceeds $200,000 (single) or $400,000 (MFJ), the child tax credit phases out at $50 per $1,000 above the threshold, so reduce your Step 3 claim accordingly.
Step 3 reduces withholding by claiming expected tax credits (mainly the child tax credit). Step 4c increases withholding - you enter a flat dollar amount per period that gets added to the calculated withholding. Step 3 is a credit claim; Step 4c is a prepayment. Use Step 3 to reflect credits you qualify for. Use Step 4c if you have non-wage income (gig work, investments, a side business) that creates additional tax liability not covered by paycheck withholding.
OBBBA Schedule 1-A deductions (tips, overtime premium, senior bonus, auto loan interest) are below-the-line deductions that reduce your taxable income, not your AGI, below what the default withholding tables assumed when your current W-4 was submitted. The standard withholding tables do not automatically reflect these deductions. To reduce over-withholding, enter the expected annual OBBBA deduction amount in Step 4b of a new W-4. Your employer reduces withholding by dividing that amount across remaining pay periods.
Step 2 signals to your employer that you have other wage income. Without Step 2, each employer withholds as if that paycheck is your only income. If you have two jobs and neither has Step 2 checked, combined withholding may fall short because each job withholds for a lower-than-actual income bracket. Step 2 offers three options: the IRS Tax Withholding Estimator, the Multiple Jobs Worksheet (result in Step 4(c)), or the two-jobs checkbox, which is generally more accurate only when the lower-paying job pays more than half of the higher-paying one. Complete Steps 3 through 4(b) on only one W-4.
Overclaiming dependents reduces withholding below what you owe. At filing, you will have a balance due. If the underpayment is large - generally owing more than $1,000 after withholding, and having withheld less than 90% of this year's tax or less than 100% of last year's tax - the IRS can assess an underpayment penalty in addition to the balance. The penalty accrues at the federal short-term rate plus 3 percentage points, applied quarterly to the unpaid amount.
No. This calculator estimates federal income tax withholding only. It does not account for state income taxes, FICA taxes (Social Security and Medicare at 7.65% combined employee rate), or local income taxes. Most states have separate withholding forms. Your federal and state withholding are calculated independently - your pay stub shows them as separate line items. To estimate your full paycheck deductions, use the Take-Home Pay Calculator.
Correction · October 2026. An earlier version of this calculator limited the qualified tips deduction to $12,500 for filers other than married filing jointly or qualifying surviving spouse. That was incorrect: the cap is $25,000 for every eligible filing status. It also allowed a qualifying surviving spouse the $25,000 overtime cap, which applies only to a joint return; allowed the tips, overtime and senior deductions on a married-filing-separately return, which is not permitted; applied no income phase-outs; and showed the 2026 head-of-household 24% and 32% bracket limits $25 too high. It also left out the 2026 deduction for cash gifts to charity by taxpayers who take the standard deduction, and it did not phase out the child and other-dependent credits above $200,000 ($400,000 married filing jointly). Its worked examples were regenerated from the calculator, and its Step 2, Step 4(a) and exemption instructions were corrected to match the 2026 Form W-4. Calculated results changed for affected inputs. The calculator now applies the statutory caps, filing-status rules and Schedule 1-A phase-outs, and works out the senior deduction from the age 65 boxes. See our Corrections Policy and Log.