The reporting break that covered overtime pay in 2025 is over, the Internal Revenue Service has confirmed: starting with wages paid in 2026, employers and other payers must separately report qualified overtime compensation on the forms workers use to file taxes. The amount now has to appear in box 12 of Form W-2 under code TT, or on Form 1099-NEC or Form 1099-MISC for the small number of workers paid that way. The distinction matters because the deduction the reporting feeds, worth up to $12,500 on a single return, cannot be claimed on any amount an employer fails to put on that line.
Box 12, code TT becomes mandatory on the 2026 Form W-2
Fact Sheet 2026-13, the IRS’s August 2026 update to its overtime-deduction guidance, spells out the change without ambiguity: starting in tax year 2026, payors and employers are required to separately report qualified overtime compensation, most commonly through Form W-2’s box 12 using code TT. The fact sheet was coordinated with the Department of Labor and the Office of Personnel Management, the two agencies that determine which workers count as FLSA overtime-eligible in the first place, since that eligibility decides who can be paid qualified overtime compensation at all.
The requirement rests on section 225(a) of the tax code, which allows the deduction only for overtime compensation included on a statement furnished to the worker, turning the paperwork into the legal gateway for the write-off rather than a courtesy. Fact Sheet 2026-13 illustrates the scale with a direct example: an employer that pays a worker $30,000 in qualified overtime compensation during 2026 must enter the full amount in box 12, code TT, even though the deduction itself tops out at $12,500 on that same worker’s return.
The 2026 Form W-4 was updated in parallel so workers can adjust withholding for the deduction in step 4(b), and the IRS’s Tax Withholding Estimator now accounts for it as well, but neither tool changes the reporting mandate itself. Overtime pay, qualified or not, remains fully subject to income tax withholding, Social Security tax and federal unemployment tax; the deduction only lowers what is owed when the return is filed, not what comes out of the paycheck.
What the rule leaves out: Which account a withdrawal comes from first decides how much of a retirement income is taxed, and no agency notice works that order out. See the account withdrawal order in The Retirement Tax & Withdrawal Planner.
The up-to-$12,500 deduction, and who actually qualifies
The deduction itself was set months earlier, in the IRS’s March 2026 release introducing new Schedule 1-A: workers can deduct qualified overtime compensation up to $12,500 on an individual return, or $25,000 on a joint return, with the amount phased down once modified adjusted gross income passes $150,000 for single filers or $300,000 for joint filers. The write-off is available whether a taxpayer itemizes or takes the standard deduction, but it carries conditions that trip up filers every season: the worker must hold a Social Security number valid for employment, and a married worker must file jointly with a spouse to claim it at all.
None of those rules are age-restricted, which is exactly why the reporting change reaches so many people who are no longer working full careers. Retail clerks, home health aides, restaurant staff and other hourly, FLSA-covered workers who pick up overtime shifts to stretch a Social Security check are governed by the identical box 12 entry as any younger colleague. The same Schedule 1-A that carries the overtime deduction also carries the separate enhanced deduction for seniors, worth up to $6,000 for a filer born before Jan. 2, 1961, or $12,000 on a joint return where both spouses qualify, so an older worker who logs overtime hours can end up claiming both deductions on one form.
That stacking only works if the paperwork lines up. Under the 2025 transition rule, a worker who never received a separate overtime figure could still estimate the deduction using worksheets tied to Notice 2025-69; for tax years after 2025, the IRS has eliminated that fallback entirely, tying the deduction directly to whatever figure the employer enters in box 12, code TT, and nothing else.
What happens when the W-2 number is wrong
Fact Sheet 2026-13 is explicit that mistakes fall on the employer to fix, not the worker to estimate around. If a business discovers an error in box 12, code TT, it must file a Form W-2c and furnish the corrected statement to the employee as soon as possible; an employer that files or furnishes an incorrect W-2 can face information-reporting penalties under sections 6721 and 6722 of the tax code, with reduced penalties available only for timely corrections.
The bigger risk sits with workers who catch an understated number and cannot get it fixed. In the fact sheet’s own example, an employer that paid a worker $10,000 in qualified overtime but reported only $5,000 in box 12 leaves that worker able to claim the full $10,000 only after receiving a corrected W-2c; without that correction, the deduction stays capped at whatever the original, understated form says, regardless of how much overtime was actually earned.
The IRS also closed a door that existed only for the 2025 transition year. Workers who could not get a corrected statement from an employer for 2025 pay were permitted to use a substitute Form 4852 to estimate the deduction; Fact Sheet 2026-13 states that Form 4852 does not satisfy the separate-reporting requirement in section 225(a) for tax years after 2025, so no substitute filing can stand in for a missing or incorrect box 12, code TT entry on 2026 wages.
New Reporting Lines and the Return They Feed
The new box 12 entry answers only how much overtime pay was reported; it says nothing about how that deduction interacts with the rest of a retirement-age filer’s return. A worker drawing Social Security while still logging overtime hours has to weigh the deduction against provisional income thresholds, IRMAA tiers and required minimum distribution timing that run on entirely different schedules. Getting one line right on Schedule 1-A does not, by itself, protect the rest of the return.
The Retirement Tax & Withdrawal Planner is a 12-page planner with four calculators (provisional income, IRMAA tier, RMD schedule, Roth bracket fill) and a walkthrough of the senior deduction.
Read the account withdrawal order in The Retirement Tax & Withdrawal Planner.
This article was researched and drafted with the assistance of AI and reviewed by The Money Overview editorial team.
