The 2026 W-4: a withholding checkup, not just a new form

A withholding discussion belongs before the return is filed. The 2026 Form W-4 gives tax professionals another reason to help clients compare their expected tax with the amount coming out of their paychecks.

What changed on the form

The deductions worksheet now accounts for qualifying tips, overtime, passenger-vehicle loan interest and the enhanced senior deduction. The form also has an exemption checkbox below Step 4(c). These changes do not mean every employee qualifies for the deductions or for exemption from withholding.

IRS reference: 2026 Form W-4 and its instructions.

Start with a projection

Collect a recent paystub from each job, year-to-date withholding, expected remaining pay, spouse income where relevant, and material nonwage income. Compare those figures with a reasonable full-year projection before recommending a form change.

Keep the discussion practical: “Our goal is to align withholding with your expected tax. Lower withholding increases take-home pay, but it can also reduce your refund or create a balance due if the estimate is wrong.” Do not treat a refund as the only measure of whether withholding worked.

A five-point review for your team

1. Confirm the client’s filing status and all jobs in the household.
2. Review Step 2 carefully when there are multiple jobs.
3. Estimate credits and deductions without counting the same item twice across jobs.
4. Check additional income and whether extra withholding is appropriate.
5. Save the projection and give the client a date to revisit it.

The IRS Tax Withholding Estimator can help with a more complete calculation. Clients should use its current instructions and keep their own copy of the result.

IRS reference: Publication 15-T: 2026 withholding guidance.

Keep payroll and tax preparation connected

A new deduction does not automatically change an employee’s payroll instructions. Explain which action the client needs to take with the employer, and keep the completed form separate from the projection that supports it.

For a client with variable overtime or tips, schedule a later check rather than setting one aggressive estimate and forgetting it. A job change, bonus or change in household income can make the original projection obsolete.

General information for tax professionals, reviewed October 9, 2026. Not individualized tax or legal advice. Confirm the applicable tax-year rules and the client’s facts before relying on this information.