2026 W-4 Step 4(b): How to Complete the Deductions Worksheet
Step 4(b) of the 2026 Form W-4 is for the total from line 15 of the Deductions Worksheet. You do not enter your standard deduction, annual salary, expected refund, or total payroll deductions directly on Step 4(b). If you take only the basic standard deduction and none of the extra items on the worksheet apply, Step 4(b) is generally left blank.
Complete the Deductions Worksheet on page 4 of the 2026 Form W-4. Add the eligible amounts for qualified tips, qualified overtime premium, passenger-vehicle loan interest, the senior deduction, other adjustments, itemized deductions, and qualifying cash gifts. Put only the worksheet's line 15 total in Step 4(b).
A W-4 tells payroll how much federal income tax to withhold. You still must establish eligibility and claim any tax-return deduction on the correct return and schedule. A Step 4(b) entry also does not make tips, overtime, or other wages exempt from Social Security or Medicare tax.
What Does W-4 Step 4(b) Do?
Form W-4 gives an employer the inputs used to calculate federal income tax withholding. Step 4(b) lowers the annualized income used in that calculation when you expect deductions beyond the basic standard-deduction assumption. That generally lowers the FIT or FWT amount on future paychecks.
The entry is not a dollar-for-dollar paycheck increase. A $10,000 Step 4(b) amount does not add $10,000 to take-home pay. It reduces the income used in the federal withholding calculation. Filing status, pay frequency, wages, Step 3 credits, Step 4(c), and the IRS withholding method still affect the result. See how FIT or FWT appears on a pay stub for the connection between the W-4 and the paycheck.
Step 4(a) adds other income to the withholding calculation. Step 4(b) accounts for deductions and generally reduces withholding. Step 4(c) adds a flat extra amount to be withheld from every paycheck.
Who Should Complete Step 4(b) in 2026?
Review the worksheet if at least one listed deduction may apply and you want payroll withholding to reflect it during 2026. The expanded form now covers several deductions created or changed under current federal law.
If none of those situations apply, leaving Step 4(b) blank tells payroll to use the standard-deduction assumption built into the withholding tables. Employer-sponsored pre-tax benefits are a separate payroll calculation. Read the difference between pre-tax and post-tax payroll deductions before copying benefit totals onto a W-4.
New and Expanded 2026 W-4 Deduction Lines
The final 2026 W-4 places the Deductions Worksheet on page 4. Its line 1 covers qualified tips, the premium portion of qualified overtime, and qualified passenger-vehicle loan interest. Line 3 covers the enhanced deduction for eligible seniors. The worksheet also retains other adjustments and itemized deductions.
| Worksheet item | 2026 amount shown on Form W-4 | Important limit | Common mistake |
|---|---|---|---|
| Line 1(a): qualified tips | Estimate up to $25,000 | The worksheet uses total income below $150,000, or $300,000 if married filing jointly. | Counting mandatory service charges or unsupported tip amounts. |
| Line 1(b): qualified overtime compensation | Estimate up to $12,500, or $25,000 if married filing jointly | Use the qualifying “and-a-half” premium, not all time-and-a-half wages. | Entering the full overtime check. |
| Line 1(c): qualified vehicle-loan interest | Estimate up to $10,000 | The worksheet uses total income below $100,000, or $200,000 if married filing jointly; additional vehicle and loan rules apply. | Including a lease, a used vehicle, principal payments, or a loan that does not qualify. |
| Lines 3(a) and 3(b): seniors | $6,000 per eligible person | The worksheet uses total income below $75,000, or $150,000 if married filing jointly. | Using the line without meeting the age, income, Social Security number, or filing requirements. |
| Line 5: other adjustments | Reasonable estimate | Includes items such as deductible IRA contributions and student-loan interest when eligible. | Entering a traditional 401(k) payroll contribution as though it were a deductible IRA contribution. |
| Lines 6–10: itemized deductions | Estimated qualifying total after worksheet limits | Medical, state and local tax, mortgage-interest, charitable, and other rules differ. | Putting all personal spending on the worksheet. |
| Line 12: cash gifts with standard deduction | Up to $1,000, or $2,000 if married filing jointly | Use qualifying cash contributions and keep records. | Counting noncash gifts or exceeding the worksheet limit. |
These are worksheet instructions, not a complete eligibility test. The IRS directs readers to the applicable return instructions and Schedule 1-A guidance for the underlying deductions. Income phaseouts, filing-status rules, Social Security number requirements, and definitions can change the amount ultimately allowed.
How to Complete the 2026 Deductions Worksheet
Lines 1(a) through 2: tips, overtime, and car-loan interest
Enter reasonable estimates for each eligible item. Add lines 1(a), 1(b), and 1(c) on line 2. For overtime, use only the qualifying premium above the regular rate. If an employee earns $20 per hour and receives $30 per hour for FLSA time-and-a-half overtime, the potential premium is $10 per overtime hour, not the full $30. The detailed guide to finding qualified overtime in payroll records explains why the full overtime line can overstate this figure.
Lines 3(a) through 4: senior deduction
Enter $6,000 on line 3(a) if you meet the worksheet conditions and will be age 65 or older before the end of 2026. A married couple filing jointly may also enter $6,000 on line 3(b) for an eligible spouse with a Social Security number valid for employment. Add the two entries on line 4.
Line 5: Schedule 1 adjustments
Estimate eligible adjustments such as student-loan interest, deductible IRA contributions, educator expenses, qualifying alimony, and certain other items from Schedule 1, Part II. Use current eligibility rules. Do not treat every deduction visible on a pay stub as a line 5 adjustment.
Lines 6 through 10: itemized deductions
Estimate qualifying medical and dental expenses above the worksheet threshold, state and local taxes within the stated limit, mortgage interest, charitable gifts, and other allowed itemized deductions. Add them on line 7 and follow lines 8 through 10 for the worksheet's income-based limitation.
Lines 11 through 14: standard deduction comparison and cash gifts
Line 11 lists the 2026 standard deductions: $16,100 for single or married filing separately, $32,200 for married filing jointly or a qualifying surviving spouse, and $24,150 for head of household. Do not copy line 11 directly into Step 4(b). The worksheet compares the itemized result with the standard-deduction baseline.
Line 12 allows a qualifying cash-contribution amount up to $1,000, or $2,000 for married filing jointly, when using the standard deduction. Follow line 14 exactly: it produces either the itemized amount above the standard deduction or the permitted line 12 amount.
Line 15: the number that goes on Form W-4
Add lines 2, 4, 5, and 14. Enter that total on worksheet line 15 and then on Step 4(b) of Form W-4. Keep the worksheet for your records. Give the completed and signed W-4 to your employer.
A Worked Step 4(b) Example
These fictional examples show the worksheet flow only. They do not confirm that a person qualifies, calculate final tax, or predict the exact paycheck change.
Example 1: qualified tips and overtime premium
Jordan files single and expects total income below the worksheet threshold. Jordan reasonably estimates $10,000 of qualified tips and $2,000 of qualified overtime premium. No other worksheet items apply.
| Worksheet line | Entry | Reason |
|---|---|---|
| 1(a) | $10,000 | Estimated qualified tips |
| 1(b) | $2,000 | Estimated qualifying overtime premium only |
| 1(c) | $0 | No qualifying vehicle-loan interest |
| 2 | $12,000 | Total of lines 1(a) through 1(c) |
| 4, 5, and 14 | $0 | No other worksheet amounts |
| 15 and Step 4(b) | $12,000 | Final worksheet total |
The $12,000 entry lowers income used for federal withholding calculations. It does not create a $12,000 refund or remove FICA from the tips and overtime.
What Not to Put on W-4 Step 4(b)
| Do not enter | Why it is wrong | Use instead |
|---|---|---|
| Your 2026 standard deduction by itself | The withholding tables already assume it when Step 4(b) is blank. | Enter only the worksheet line 15 result. |
| Your expected refund or tax bill | Step 4(b) is a deduction input, not a tax or refund field. | Use the IRS estimator; an extra per-paycheck amount belongs in Step 4(c). |
| Your annual salary or gross pay | Payroll already uses wage information in the withholding calculation. | Use real wage data in the estimator when requested. |
| The full amount of overtime wages | The new overtime line uses qualifying premium compensation, not the whole time-and-a-half amount. | Identify the premium with payroll records and official rules. |
| Every pre-tax deduction on the pay stub | Many employer-plan deductions are already reflected in taxable wages. | Use only worksheet categories for which you qualify. |
| An invented number to increase take-home pay | Unsupported entries can cause under-withholding, tax due, penalties, and a false certificate. | Use supportable estimates and update the W-4 when facts change. |
How Step 4(b) Works With Multiple Jobs
If you hold more than one job, or you file jointly and your spouse also works, complete Step 2. The 2026 Form W-4 says to complete Steps 3 through 4(b) on only one W-4, preferably the form for the highest-paying job. Repeating the same Step 4(b) amount on several jobs can reduce withholding more than intended.
The IRS estimator is generally the best route when income varies, a job began midyear, you have self-employment income, or several changes apply.
What to Do After You Submit the W-4
- Keep a copy of the signed W-4 and the worksheet used to support Step 4(b).
- Allow payroll time to apply the update. Ask HR or payroll which pay period will reflect it.
- Use the IRS Tax Withholding Estimator with current pay stubs to check the full-year result.
- Review the federal tax line on a later check. Use the pay-stub reading checklist to compare gross pay, taxable wages, FIT or FWT, and net pay.
- Submit a new W-4 if income, jobs, deductions, dependents, or filing circumstances materially change.
A valid Step 4(b) entry generally reduces federal income tax withholding. Social Security, Medicare, state tax, and benefit deductions may not move the same way. Compare a similar pay period and ask payroll to confirm the W-4 inputs if the result cannot be explained.
Use the 2026 W-4 form generator to enter accurate information, review the completed form, and prepare a signed copy for your employer. The tool does not replace the IRS estimator or personal tax advice, and every entry should reflect your real situation.
Frequently Asked Questions
Enter the total from line 15 of the 2026 Deductions Worksheet. Do not enter the standard deduction by itself, your salary, or your expected refund.
Generally, yes, if you take only the basic standard deduction and none of the extra worksheet categories apply. A blank line tells payroll to use the standard-deduction assumption in the withholding tables.
A valid entry generally reduces federal income tax withholding, which may increase take-home pay. It is not a dollar-for-dollar increase, and the exact result depends on wages, filing status, pay frequency, other W-4 entries, and the withholding method.
Eligible estimates can flow through the page 4 worksheet to Step 4(b). Use qualified tips and only the qualifying overtime premium, subject to the worksheet limits and the tax-law eligibility rules.
No. Step 4(b) adjusts payroll withholding. You still must qualify for and claim the deduction on the correct federal income tax return and schedule.
No. Step 4(b) changes federal income tax withholding. It does not directly reduce FICA wages or make otherwise covered earnings exempt from Social Security and Medicare tax.