Adjusting Withholding for the New Deductions: Bigger Paychecks or Bigger Refunds?

Paycheck withholding is designed to approximate your annual tax. When a new deduction lowers that tax, your employer keeps withholding as before unless you tell it otherwise, and the difference comes back as a refund the following spring. For workers with large tips or overtime, that can mean several thousand dollars held by the government for a year. This guide explains how to decide whether to change it.

Why withholding does not adjust by itself

Employers compute federal income tax withholding from your Form W-4 and the IRS percentage tables. The tables use the standard deduction for your filing status, but they do not know whether your overtime is FLSA-required, whether your occupation is on the tipped list, whether you bought a US-assembled car or how old you are. Those facts determine Schedule 1-A amounts, so only you can account for them. The tool for that is Step 4(b) of Form W-4, "Deductions," where you can enter expected deductions beyond the standard deduction.

The trade-off

Lowering withholding increases each paycheck but shrinks your refund. If your estimate is too high — tips slow down in a bad season, overtime dries up, or your MAGI ends up in a phase-out range — you could owe at filing time and, in some cases, an underpayment penalty. Keeping withholding unchanged is the conservative choice: you receive the benefit as a larger refund. Neither option changes your total tax; it is purely a question of timing and cash flow.

Using the IRS Tax Withholding Estimator

The IRS Tax Withholding Estimator is the official way to work through the decision. You enter pay information from recent stubs, expected income from other sources and expected deductions, and the estimator produces a recommended W-4. If you expect Schedule 1-A deductions, gather these figures first:

• Year-to-date qualified tips and an estimate for the rest of the year.
• Year-to-date overtime hours and rate, or the qualified premium if payroll shows it.
• Interest paid so far on a qualifying car loan and the remaining scheduled payments.
• Ages and expected MAGI if you or your spouse are 65 or older.

The calculators on this site can turn those inputs into deduction estimates. Enter the total as an expected deduction in the estimator if it does not ask for each one separately.

A cautious rule of thumb

If your tips or overtime are steady, consider claiming 70% to 80% of the expected deduction on Form W-4 rather than all of it. That captures most of the cash-flow benefit while leaving room for a slower month. If they are seasonal, recompute mid-year. If you are near any phase-out threshold, apply the phase-out before entering a figure, because a small change in income can reduce the deduction.

Example: a server with steady tips

A single server expects $22,000 of qualified tips and $50,000 of AGI in 2026. Her tips deduction is $22,000. In the 12% bracket, it reduces tax by roughly $2,640 — $110 per semimonthly paycheck if spread across 24 pay periods. Entering about $17,000 on Step 4(b) would raise each paycheck by roughly $85 and still leave a cushion. If her tips come in lower, she is unlikely to owe at filing time.

Example: overtime that varies

A maintenance technician had heavy overtime in the first half of 2026 and expects little in the second half. Rather than updating his W-4 for the whole year, he could leave withholding alone and receive the benefit as a refund, or submit a W-4 for the remaining months based on the premium already earned. In either case, he should revisit the W-4 in January so that 2027 withholding reflects 2027 expectations.

Retirees and estimated payments

Retirees often pay tax through withholding from pensions or IRA distributions, or through quarterly estimated payments. The senior deduction reduces the tax those payments need to cover. Pension withholding can be changed with Form W-4P, and estimated payments can simply be lowered for the remaining quarters. Underpayment penalties generally do not apply if you pay at least the smaller of 90% of this year's tax or 100% of last year's (110% for higher incomes), so the prior-year safe harbor gives room to reduce payments without risk.

Social Security and Medicare withholding are unchanged

None of the new deductions affect FICA withholding. Social Security and Medicare tax continue to be withheld from all wages, tips and overtime at the usual rates. A worker who sees a bigger paycheck after updating the W-4 is seeing lower income tax withholding only.

State withholding

State income tax withholding follows state forms and rules. If your state has not adopted the federal deductions, do not reduce state withholding for them. Some states have their own versions of tips or overtime relief; check your state revenue department.

Two jobs or two earners

Withholding errors are most common in households with more than one job. If you have a tipped evening job and a daytime job, or both spouses work, the W-4 for only one job should carry the Step 4(b) deduction amount; entering it on every W-4 counts it twice. The IRS recommends completing Step 2 (multiple jobs) and putting deductions and other adjustments on the W-4 for the highest-paying job. For a married couple where only one spouse has qualified tips or overtime, that spouse's W-4 is still not necessarily the right place — use the job that pays the most, because the withholding tables apply rates more accurately there. Recheck in the estimator after the first paycheck under the new W-4 to confirm the change had the effect you expected.

When to revisit

• When you start or leave a tipped or hourly job.
• When overtime patterns change materially.
• When you buy a qualifying vehicle.
• When you or your spouse turn 65.
• At the start of each year from 2026 through 2028, because the deductions end after 2028 unless Congress extends them.

Use the Schedule 1-A calculator to estimate the annual total, then confirm in the IRS estimator. This guide is general education; your employer and the IRS cannot be bound by it.