What you claim on your W-4 comes down to four inputs: your filing status in Step 1, your dependents in Step 3, an adjustment in Step 2 if you or your spouse hold more than one job, and any extras in Step 4 for non-wage income, itemized deductions, or additional withholding. The 2026 form no longer uses allowances. Instead, it converts your situation into a dollar figure your employer applies to every paycheck, and the closer that figure tracks your actual tax bill, the smaller your refund or balance due at filing time.
Start With Your Filing Status
Step 1 asks for your name, address, Social Security number, and filing status. Status is the single biggest factor in how much tax comes out of your check because it sets your standard deduction and which brackets apply.1Internal Revenue Service. Filing Status The five options are Single, Married Filing Jointly, Married Filing Separately, Head of Household, and Qualifying Surviving Spouse. Most workers pick Single, Married Filing Jointly, or Head of Household.
For 2026, the standard deduction that gets built into the withholding math is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Getting this line wrong distorts everything downstream, so double-check before moving on.
Claim Your Dependents in Step 3
Step 3 is where most of your withholding reduction comes from. For each qualifying child under age 17, enter $2,200. For each other dependent, including a child 17 or older or a qualifying relative, enter $500.3Internal Revenue Service. Child Tax Credit Add the amounts and put the total on the line provided. Each dollar entered here reduces the tax your employer withholds across the year.
A dependent has to meet the relationship, residency, and support tests in the tax code.4Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined Only the person who will actually claim the dependent on the return should list them here. If you are married filing jointly and both spouses work, put the dependents on one W-4 only, typically the higher earner’s. Listing the same child on both W-4s will underwithhold the household.
Handle Multiple Jobs or a Working Spouse in Step 2
Skip Step 2 if you have one job and either you are single or your spouse does not work. Complete it if you hold more than one job at a time, or if you file jointly and your spouse also earns wages. Without this adjustment, each employer withholds as though its paycheck is your only income, which pushes some of your earnings into a lower bracket than your combined income actually sits in. The result is underwithholding across every job.
The form gives you three ways to fix that:
- The IRS Tax Withholding Estimator at irs.gov is the most accurate. It walks through your full picture and generates a pre-filled W-4 you can print or hand to payroll.5Internal Revenue Service. IRS Tax Withholding Estimator Helps Taxpayers Get Their Federal Withholding Right
- The Multiple Jobs Worksheet included with the form calculates an extra per-paycheck withholding amount based on the pay from each job.
- The Step 2(c) checkbox is a shortcut. If your household has exactly two jobs and the lower-paying job earns more than half of the higher-paying one, check the box on both W-4s. The form then splits the standard deduction and brackets in half for each job. Accuracy drops when the two salaries are far apart.6IRS.gov. Form W-4 (2026) Employee’s Withholding Certificate
Use Step 4 for Other Income, Deductions, or Extra Withholding
Step 4 is optional and has three lines. Fill in only what applies.
Line 4(a) — Other income. Enter the total non-wage income you expect for the year: interest, dividends, retirement distributions, and similar items that arrive without any tax withheld. Your employer spreads extra withholding across your paychecks to cover the tax on that income.6IRS.gov. Form W-4 (2026) Employee’s Withholding Certificate
Line 4(b) — Deductions. If your itemized deductions will beat the standard deduction, enter the excess here. Mortgage interest, state and local taxes (capped at $40,000 for most filers, or $20,000 if married filing separately), and medical expenses above 7.5 percent of adjusted gross income are the common items.7Internal Revenue Service. Topic No. 503, Deductible Taxes The form’s Deductions Worksheet helps you land on the right figure.
Line 4(c) — Extra withholding. A flat dollar amount to take out of every paycheck on top of the normal calculation. Useful if you have freelance income, owe back taxes, want a bigger refund, or need to cover a coming shortfall.
One privacy note about Line 4(a): your employer sees whatever you write there. If you enter $10,000, payroll knows you expect $10,000 in outside income. To keep the source and size of that income private, calculate the tax it would generate, divide by the pay periods left in the year, and put that per-paycheck figure on Line 4(c) instead. The withholding result is the same; your employer only sees an extra dollar amount.6IRS.gov. Form W-4 (2026) Employee’s Withholding Certificate
Step 5 is your signature and date. The form is not valid without it.
Claiming Exempt From Withholding
A worker who earns very little can claim full exemption from federal income tax withholding. You have to meet both parts of a two-part test: zero federal income tax liability last year, and zero expected federal income tax liability this year.6IRS.gov. Form W-4 (2026) Employee’s Withholding Certificate Zero liability means either the total tax on line 24 of last year’s return was zero (or fully covered by refundable credits), or your income was below the filing threshold. Students and part-time workers are the usual candidates.
To claim it on the 2026 form, skip Steps 2 through 4 and check the box in the “Exempt from withholding” section below Step 4(c).6IRS.gov. Form W-4 (2026) Employee’s Withholding Certificate Exempt status only covers federal income tax. Social Security at 6.2 percent and Medicare at 1.45 percent still come out. Exemption expires automatically, and you must file a new W-4 by February 16 of the following year to keep it.
When to Redo Your W-4
You can update your W-4 any time. The IRS recommends rechecking withholding after any major life event.8Internal Revenue Service. Tax Withholding: How to Get It Right Common triggers:
- Getting married or divorced changes your filing status, standard deduction, and household income.
- Having or adopting a child adds a dependent worth up to $2,200 on your W-4.
- Buying a home can push you into itemizing, which means an entry on Line 4(b).
- Starting a second job or side business calls for a Step 2 adjustment.
- Retiring, or a spouse leaving work, reduces household income and may change the Step 2 answer.
The Tax Withholding Estimator is the fastest way to see whether your current withholding is still on track after any of these.9Internal Revenue Service. Tax Withholding Estimator It pulls in your year-to-date numbers and projects whether you are heading toward a refund or a bill.
Avoiding an Underpayment Penalty
If too little tax comes out during the year, you can owe a penalty on top of the tax. It works like interest on the shortfall, charged at the IRS quarterly rate, currently 7 percent annually.10Internal Revenue Service. Quarterly Interest Rates You avoid the penalty entirely if you hit any one of these safe harbors:11Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
- Your balance due after withholding and credits is less than $1,000.
- Your withholding and estimated payments cover at least 90 percent of the tax on this year’s return.
- Your withholding equals or exceeds the total tax on last year’s return. That threshold rises to 110 percent if your prior-year adjusted gross income was over $150,000 ($75,000 if married filing separately).
Realizing mid-year that your withholding is too low is fixable. Submit an updated W-4 with an extra amount on Line 4(c). Doing it earlier in the year spreads the catch-up across more paychecks.
Bonuses Follow a Separate Rule
Your W-4 controls withholding on your regular paycheck, but bonuses, commissions, and other supplemental wages do not. Employers withhold federal income tax on supplemental wages at a flat 22 percent regardless of what your W-4 says. Above $1 million in supplemental pay from one employer in a calendar year, the rate on the excess jumps to 37 percent.12Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide A large bonus can leave you over- or underwithheld for the year. Run the Tax Withholding Estimator afterward and adjust the remaining paychecks if needed.
If You Are a Nonresident Alien
Different rules apply if you are a nonresident alien working in the United States. Check “Single” or “Married filing separately” in Step 1 regardless of your actual marital status, and write “nonresident alien” or “NRA” in the space below Step 4(c). Do not account for a spouse’s job in Step 2, because nonresident aliens generally cannot file jointly. Only nonresident aliens from Canada, Mexico, South Korea, or India can use Step 3 to claim dependents. With more than one job, complete Steps 3 and 4(b) on the W-4 for the highest-paying job only. Exempt status on the W-4 is not available to nonresident aliens even if they meet the zero-liability test.13Internal Revenue Service. Supplemental Form W-4 Instructions for Nonresident Aliens (Notice 1392)