Do USPS Workers Qualify for No Tax on Overtime?

Yes, USPS workers can benefit from the new “no tax on overtime” rule for tax years 2025 through 2028, but the break is narrower than the slogan suggests. Only the premium half of your time-and-a-half is deductible, the deduction caps at $12,500 per return ($25,000 joint), and Social Security, Medicare, and state income taxes still apply to every overtime dollar. Most postal craft employees qualify because they’re classified as FLSA nonexempt.

How USPS Workers Qualify

The deduction applies to overtime compensation required by the Fair Labor Standards Act. USPS employees fall under the Department of Labor’s FLSA regulations rather than OPM’s, a distinction the IRS has acknowledged in its guidance on qualified overtime compensation.¹

To claim the deduction, you need to be FLSA nonexempt. Most USPS craft employees are: letter carriers, mail handlers, clerks, and similar positions earn overtime at one and one-half times their regular rate for hours worked beyond 40 in an FLSA workweek.² You can confirm your status on your Standard Form 50 (Notification of Personnel Action). Block 35 shows your FLSA category; “N” means nonexempt and eligible.¹

For the 2025 tax year, employers may voluntarily report qualified overtime compensation in Box 14 of your W-2. Starting with the 2026 tax year, that reporting is mandatory, so your W-2 will show the exact amount of overtime premium eligible for the deduction.¹

What Counts as Qualified Overtime

The One, Big, Beautiful Bill Act created the deduction for “qualified overtime compensation” effective for tax years 2025 through 2028. It covers only the pay that exceeds your regular hourly rate: the premium portion, not the full overtime check. If your regular rate is $30 per hour and you earn $45 per hour on overtime, only the $15 premium per hour is deductible.³

Put in dollars: if you earn $10,000 in total overtime pay during the year, roughly $3,333 is the deductible premium (the extra half), not the full $10,000.³

The other limits:

Maximum deduction of $12,500 per return, or $25,000 if you file jointly.
Phase-out begins when your modified adjusted gross income exceeds $150,000 (single) or $300,000 (joint).
Married taxpayers must file jointly to claim it.
Your Social Security number must be on the return.
You do not need to itemize; the deduction is available whether you take the standard deduction or itemize.³

The provision sunsets after 2028. Unless Congress extends it, overtime returns to being fully taxable for federal income tax purposes starting in 2029.

What the Deduction Does Not Cover

“No tax on overtime” is a slogan, not a description. The deduction reduces your federal income tax and nothing else.

Every overtime dollar you earn is still subject to the full 6.2 percent Social Security tax and the 1.45 percent Medicare tax, just as it was before.⁴ The Social Security tax stops for the year once your combined wages cross the annual wage base of $184,500 for 2026.⁵ Medicare has no cap and applies to every dollar. State income tax also continues to apply according to your state’s own rules.

Withholding is a separate issue from the deduction itself. When your employer processes a paycheck with overtime, the payroll system can either withhold a flat 22 percent on the supplemental wages or add the overtime to your regular pay and calculate withholding as if you earned that inflated amount every pay period.⁴ Under the second method, a paycheck heavy with overtime gets withheld as though every check looked that way, projecting an annual salary far higher than what you’ll actually earn. That’s why overtime checks feel punished at the moment of payment. Withholding is an estimate, not your tax rate. The real math happens on your return, and the new deduction is applied there. Unless the IRS updates withholding tables to reflect the deduction, your paycheck withholding likely won’t change even though your final tax bill will.

Regular Overtime vs. Penalty Overtime

The Postal Service has its own overtime structure that goes beyond what the FLSA requires, and the distinction matters for how much of your overtime qualifies.

Regular overtime is paid at one and one-half times your basic hourly rate for hours worked beyond 8 in a day or 40 in a service week.⁶
Penalty overtime is paid at twice your basic hourly rate for hours that qualify under the applicable collective bargaining agreement.⁶

The new deduction covers overtime “required by the FLSA.” The FLSA only requires time-and-a-half for hours beyond 40 in a workweek. Penalty overtime is a USPS contractual benefit, not an FLSA mandate. The FLSA-required premium on a penalty overtime hour would still be just the 0.5x premium, even though USPS pays you the full 1.0x premium at the double-time rate. Whether the additional contractual premium above the FLSA floor qualifies is a question worth raising with your HR office or payroll provider. The IRS has acknowledged that special rules apply to federal employees’ overtime calculations and directed workers to consult their agency’s human resources office.¹

Overtime, FERS, and the TSP

One thing the tax deduction cannot fix: overtime does nothing for your federal retirement. The FERS annuity is calculated using your “high-3” average salary, meaning the highest average basic pay you earned during any three consecutive years. Overtime pay is explicitly excluded from that calculation.⁷

The Thrift Savings Plan works the same way. Your employee contributions and the agency’s matching contributions are calculated as a percentage of your basic pay, not your total earnings. If you contribute 5 percent, that 5 percent comes out of basic pay only. Overtime earnings don’t generate additional TSP contributions or additional agency match.⁸

A carrier who works 500 hours of overtime in a year takes home significantly more pay, but the retirement benefit and TSP balance don’t reflect any of it. If you’re leaning on overtime to fund long-term goals, the money needs to go into savings or investments on your own.

Adjusting Withholding for Peak Season

If you consistently work overtime, your default W-4 was probably set for a standard 40-hour week. That mismatch means the payroll system either over-withholds and hands you a large refund you could have used during the year, or under-withholds and leaves you with a balance due in April.

The IRS recommends reviewing your W-4 whenever your financial situation changes, and a sustained run of overtime counts.⁹ If you routinely work overtime during the holiday season or election mail periods, consider adjusting withholding for those months and then adjusting back when the extra hours taper off. The IRS Tax Withholding Estimator on irs.gov can help you run the numbers.

Before peak season, three practical steps: check block 35 on your SF-50 to confirm your FLSA nonexempt status, look at how your W-2 reports overtime compensation (mandatory in Box 14 starting with the 2026 tax year), and revisit your W-4 so the withholding roughly matches what you’ll actually owe once the deduction is applied.

1
Internal Revenue Service. Questions and Answers About the New Deduction for Qualified Overtime Compensation
2
United States Postal Service. Employee and Labor Relations Manual – 443 Overtime Pay
3
Internal Revenue Service. One, Big, Beautiful Bill Act: Tax Deductions for Working Americans and Seniors
4
Internal Revenue Service. Publication 15 – Employer’s Tax Guide
5
Social Security Administration. Contribution and Benefit Base
6
United States Postal Service. Employee and Labor Relations Manual – 434 Overtime and Premium Pay
7
U.S. Office of Personnel Management. Computation
8
Thrift Savings Plan. Contribution Types
9
Internal Revenue Service. About Form W-4, Employee’s Withholding Certificate