Your 2026 Overtime Tax Break Now Lives or Dies in One Box on Your W-2

If you clock overtime and you’re counting on that new deduction, you just lost your backup plan. The IRS updated its overtime guidance on August 6. For 2026, you can’t work the number out from your own pay stubs anymore. Whatever your employer types into box 12, code TT of your W-2 is your whole deduction. Nothing above it counts.

Last year was the loose year.

The One Big Beautiful Bill created a deduction for the premium half of overtime pay, the extra your employer owes you above your regular rate in time-and-a-half. For 2025, employers weren’t required to break that number out on your W-2, and plenty of them didn’t, so the IRS let you calculate it yourself from your own records. Reasonable for a first year.

That door is now shut. The IRS says that “for tax years 2026 and later years, employers and other payers are required to separately report qualified overtime compensation.” Fact sheet FS-2026-13, published August 6, drops the self-calculation methods and moves the number to exactly one place: Form W-2, box 12, code TT.

If your employer leaves that box empty, you can’t fill it in for them. A folder of pay stubs won’t do it. A substitute Form 4852 won’t do it. The only repair is a corrected W-2, a W-2c, and your employer is the only one who can file it.

The deduction is worth up to $12,500 if you file single and $25,000 filing jointly, and it starts phasing out once income passes $150,000, or $300,000 for a couple. Take a warehouse or hospital worker with $8,000 of overtime premium for the year. In the 12% bracket that’s roughly $960 off the federal tax bill. In the 22% bracket, roughly $1,760.

Real money. And it now hangs on whether somebody in payroll flipped a switch back in January.

Your employer’s payroll settings should not decide your tax deduction. They do anyway. So check.

Send payroll one email this week. Ask whether the company is tracking qualified overtime compensation for box 12, code TT on the 2026 W-2. That is the entire question. If the answer is a shrug, you have roughly four months to get it fixed while it’s still a payroll setting instead of a correction request.

Then look at box 12 in January, before you file. Find the TT line. If it’s missing or the number looks light against your own records, ask for the W-2c first and file second. Chasing a correction in February beats chasing a refund in November. Run the expected savings through our budget planner if you want, but don’t spend it until you’ve seen the code.

For the record: the deduction covers only the premium portion of overtime required under section 7 of the Fair Labor Standards Act, the “half” in time-and-a-half, not the whole overtime check. Social Security and Medicare tax still comes out of every dollar of it. And the break sunsets after 2028 unless Congress extends it.

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