Workers who put in extra hours have a new line on their year-end tax paperwork. Starting with tax year 2026, employers have to total up the overtime premium they paid and print it on the W-2 in a code the form has never used before. Anyone planning to claim the federal overtime deduction will be working from that one number.
The question for people who work overtime is simple. Where does the figure for the deduction come from, and what happens when it looks wrong?
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Box 12, code TT, is the overtime line
The IRS’s 2026 General Instructions for Forms W-2 and W-3 say a new box 12 code, TT, “will be used to report the total amount of qualified overtime compensation.” The same instructions add code TP for cash tips reported to the employer, and a new box 14b for Treasury Tipped Occupation Codes.
Box 12 is the part of the W-2 where employers list special items, each tagged with a letter code. Code TT sits in that box, not in box 1 with ordinary wages, and not in box 14b, which carries the tipped-occupation code instead.
What counts as qualified overtime
The IRS defines qualified overtime as pay that goes beyond a worker’s regular rate under section 7 of the Fair Labor Standards Act. In plain terms, that is the “and-a-half” part of time-and-a-half. The straight-time portion of an overtime hour is not part of the figure.
The IRS’s summary of the new deductions for working Americans and seniors says the deduction runs for tax years 2025 through 2028. The maximum is $12,500 a year, or $25,000 for joint filers, and it phases out for modified adjusted gross income over $150,000, or $300,000 for joint filers. Both itemizers and people who take the standard deduction can use it.
2026 is the first year the W-2 carries it
The IRS’s frequently asked questions on the overtime deduction, updated August 6, 2026, say employers must report qualified overtime paid to an employee beginning in 2026. For tax year 2025, Notice 2025-69 gave employers relief from that requirement, so a 2025 W-2 may show no overtime entry even for someone who earned plenty of it. The IRS says no relief is available for tax years after 2025.
The full amount goes in the box, even when it is bigger than the deduction. The IRS gives the example of an employer that paid $30,000 of qualified overtime in 2026. All $30,000 goes in box 12 with code TT, while the deduction itself stays capped at $12,500, or $25,000 on a joint return.
Why pay stubs do not settle it
Schedule 1-A is the form that calculates and claims the new deductions, and the IRS says it “requires taxpayers to report the full amount of qualified overtime compensation” from box 12, code TT. The schedule then applies the dollar limit and the income phase-out. The IRS’s explainer on the new form says Part III is for people who received qualified overtime under the Fair Labor Standards Act.
The fact sheet is firm that employees may not count any qualified overtime beyond what appears in box 12, code TT. A worker whose own pay stubs add up to more than the W-2 shows cannot simply use the larger number.
If the W-2 overstates the pay, the deduction is limited to the amount actually paid. If it leaves out overtime or understates it, the IRS says the worker needs a corrected Form W-2c from the employer. Without one, the extra amount cannot be used, and the IRS says Form 4852, the substitute for a missing W-2, does not satisfy the law’s requirement.
Who needs a valid Social Security number
The IRS says the person claiming the deduction must have a valid Social Security number. On a joint return, both spouses need one if both received qualified overtime. Married people also have to file jointly to take the deduction.
That makes the W-2 a document worth a close look when it arrives in early 2027. Workers can compare code TT against their own records of premium pay, and raise any gap with the payroll department before filing. The IRS’s W-2 instructions are the free reference for what each box and code is supposed to show.
What can a worker do when the code TT number comes up short?
A code TT figure that leaves out overtime that was actually paid costs a worker part of the deduction, and the IRS says only a corrected W-2c from the employer fixes it. A request that is vague or sent to the wrong place can sit for weeks while the filing season moves on.
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This article was produced with AI assistance and edited for accuracy against the sources linked above.
