For tax year 2025, employers were not required to separately report qualified overtime in W-2 Box 12. The IRS provided transition relief: Notice 2025-62 waived penalties for failing to report the amount, and Notice 2025-69 gave employees guidance on how to calculate their own deduction from pay stubs. That relief is gone.
For tax year 2026, the finalized 2026 Form W-2 and its instructions, published by the IRS in January 2026, establish Box 12 code TT as mandatory. Every employer that pays FLSA-required overtime to non-exempt employees must separately calculate and track the overtime premium throughout the year, report the total qualified overtime compensation in Box 12 code TT on the 2026 W-2 issued in early 2027, and ensure the payroll systems tracking that amount are capturing the correct figure.
If your payroll system was not updated to separately track the FLSA overtime premium starting January 1, 2026, you have a year-to-date compliance gap right now. This post covers exactly what code TT requires, what goes in it, what does not qualify, what the penalty exposure is, and how to reconcile the amount at year-end.
The deduction itself is temporary. The OBBBA's no-tax-on-overtime deduction is currently scheduled to sunset after 2028. The W-2 reporting requirement runs for the same period. But for 2026 and through 2028, the reporting is mandatory, and the penalty exposure is real.
What Is the "No Tax on Overtime" Deduction and How Does It Work?
The OBBBA, signed July 4, 2025, added a new deduction for qualified overtime compensation under the Internal Revenue Code. The deduction allows eligible individuals to deduct up to $12,500 of qualified overtime compensation from their federal taxable income per year ($25,000 for joint filers). The deduction is taken on Schedule 1-A, Part III, of the Form 1040.
The deduction is an individual tax benefit, not an employer payroll tax exclusion. The employee's overtime compensation is still fully subject to Social Security tax, Medicare tax, FUTA, and state income tax. The employee's federal income tax withholding on overtime wages is unchanged during the year. At tax filing, the eligible employee claims the deduction on their Form 1040, reducing their federal taxable income by the qualifying amount.
The employer's role is informational: calculate and report the qualified overtime premium on the W-2 so the employee and their tax preparer can confirm the deductible amount without reconstructing it from pay stubs.
The deduction phases out based on modified adjusted gross income. For a single filer, the deduction begins to phase out at $150,000 of MAGI and is fully phased out at $275,000 if the employee has the maximum $12,500 deduction. For joint filers, the phase-out begins at $300,000 and is fully phased out at $550,000 at the maximum $25,000 deduction.
The deduction is temporary. It applies to tax years 2025 through 2028 and is currently scheduled to sunset on December 31, 2028.
What Changed Between 2025 (Transition Relief) and 2026 (Mandatory Reporting)?
The distinction between 2025 and 2026 is the key compliance inflection point.
For tax year 2025, employers were in transition. IRS Notice 2025-62 waived penalties for failing to separately report qualified overtime compensation on the W-2. The IRS encouraged, but did not require, employers to report the amount either in a separate employee statement or in Box 14 of the W-2. Employees who did not receive Box 14 information could still claim their overtime deduction by calculating it from their own pay records under IRS Notice 2025-69. The 2025 W-2 forms issued in early 2026 did not include a required Box 12 code TT entry for most employers.
For tax year 2026, that relief is gone. The finalized 2026 Form W-2 includes Box 12 code TT as a defined, required reporting field for qualified overtime compensation. The 2026 Form W-2 instructions published in January 2026 confirm: employers must report total qualified overtime compensation in Box 12 code TT for the 2026 tax year. There is no equivalent transition relief notice for 2026. The O'Neil Cannon analysis from December 2025 confirmed explicitly: "This transition penalty relief will not be available for the 2026 tax year and beyond."
The practical consequence: any employer that continued to rely on 2025 transition practices into 2026 without updating their payroll system to separately track the FLSA overtime premium has been generating compliance exposure with every payroll run since January 1, 2026. The mid-year audit every controller should be conducting right now is a review of whether payroll codes are correctly separating the FLSA overtime premium from total overtime wages.
What Is W-2 Box 12 Code TT and What Goes In It?
Box 12 code TT reports the total amount of qualified overtime compensation paid to the employee during the 2026 tax year. The 2026 Form W-2 instructions define the amount as: the total amount of qualified overtime compensation earned by the employee for the year.
Three critical facts about what goes in Box 12 code TT:
It is the premium only, not the total overtime pay. When an employee receives time-and-a-half for overtime hours, the total overtime pay consists of the regular rate plus the half-time premium. Box 12 code TT receives only the premium portion: the extra half above the regular rate. The regular portion of overtime wages (equivalent to the regular rate for those hours) is already included in Box 1 total wages and does not appear separately in code TT. The full overtime pay is in Box 1. Only the premium goes in code TT.
The amount in Box 12 code TT is not excluded from Box 1. The qualified overtime premium is already included in Box 1 total wages. Code TT does not represent excluded wages. It represents wages that the employee may deduct on their Form 1040 if eligible. Box 1 and Box 12 code TT amounts overlap for the premium portion.
It applies only to FLSA-required overtime. Code TT captures only the FLSA-required overtime premium, not voluntary premiums paid by the employer, state-law premiums, or collectively bargained premiums. The IRS QA on qualified overtime is explicit: the deduction applies only to overtime required under Section 7 of the FLSA.
What Is "Qualified Overtime" and What Overtime Does NOT Qualify?
This is where the most significant compliance errors occur, because many employers pay multiple types of overtime and not all of them qualify for the deduction or for code TT reporting.
Qualified overtime is overtime required under Section 7 of the FLSA. Specifically, it is the premium portion of pay for hours worked in excess of 40 in a workweek, paid to an employee who is both covered by the FLSA and not exempt from its overtime requirements. The FLSA generally requires time-and-a-half for hours over 40 in a workweek for non-exempt employees. The premium is the half: if the employee earns $20 per hour and the FLSA overtime rate is $30, the premium is $10 per hour.
What does NOT qualify:
State-law overtime. Many states require overtime pay in situations that go beyond FLSA minimums, such as overtime for hours over 8 in a day (California) or for specific industries. Only the FLSA-required portion qualifies. State-law overtime that exceeds what FLSA would require does not produce qualified overtime compensation.
Collective bargaining agreement overtime. If a union contract requires overtime at higher rates or in additional circumstances beyond FLSA, the premium for those additional hours or higher rates is not qualified overtime compensation under the IRS definition.
Voluntary employer overtime. An employer that pays double time as a matter of policy for holiday work, weekend work, or shift premiums is paying voluntary overtime. The voluntary premium above what FLSA requires is not qualified overtime compensation.
Exempt employee overtime. Employees who are exempt from FLSA overtime requirements, including most salaried exempt employees, cannot have qualified overtime compensation regardless of what additional pay they receive for extra hours.
Alternative workweek calculations. The FLSA permits alternative work period calculations for law enforcement and fire protection employees, who may work on a different overtime threshold (up to 86 hours over a 14-day period). For these employees, the FLSA overtime threshold differs from the standard 40-hour week.
The IRS QA on qualified overtime confirms: an individual who is ineligible for overtime under the FLSA does not receive qualified overtime compensation regardless of other laws or circumstances providing for overtime pay.
For employers with multi-state workforces or with union agreements, this means payroll systems need to isolate specifically the FLSA-required premium from other overtime and premium pay categories.
What Is the FLSA Overtime Premium and How Do You Calculate It?
The calculation of the FLSA overtime premium, which is the figure that goes in Box 12 code TT, uses the FLSA's regular rate of pay concept.
Under FLSA, the regular rate of pay is not simply the base hourly rate. It includes all remuneration paid to the employee in a workweek divided by the total hours worked, with specific exclusions for certain types of pay (discretionary bonuses, gifts, overtime premiums already paid, and some other items). For most hourly employees with a single fixed rate, the regular rate equals the base hourly rate.
The overtime premium is 0.5 times the regular rate for each overtime hour. If the employee earns a regular rate of $20 per hour and works 5 overtime hours in a week, the premium is 5 hours times $0.5 times $20 = $50 for that week.
The year-to-date total of all weekly overtime premiums is the Box 12 code TT amount for the year.
For employees with fluctuating workweeks or with multiple pay rates, the regular rate calculation is more complex. Employers who pay piece rates, commission-based pay, or multiple hourly rates need to confirm that their payroll system is computing the regular rate correctly under the FLSA rules before calculating the overtime premium for code TT purposes.
The MRSC analysis provides the cleanest illustration: if an employee earns $20 per hour and the FLSA overtime rate is $30, only the $10 premium per hour qualifies. The deductible amount equals one-third of the total overtime pay for that employee when paid at exactly time-and-a-half, because the premium is one-third of the total overtime rate (10 out of 30). This one-third relationship only holds when all overtime is paid at exactly 1.5x.
What Payroll System Changes Are Required to Track Code TT Correctly?
The code TT reporting requirement is a data extraction problem as much as a tax problem. The W-2 instruction sets the reporting obligation. The payroll system infrastructure determines whether the employer can satisfy it.
Five specific payroll system changes are required for accurate code TT reporting.
Create a dedicated payroll earnings code for the FLSA overtime premium. Most payroll systems pay overtime as a single earnings code at 1.5x the regular rate. To separately track the premium (0.5x), the system needs either a separate earnings code for the premium component or a calculation that splits total overtime pay into its regular-rate and premium components. Without this separation, the system cannot produce the code TT amount without manual reconstruction at year-end.
Confirm that the earnings code captures only FLSA-required overtime. If the employer pays multiple types of overtime (FLSA, state-law, voluntary, union), the earnings code for the FLSA premium must be distinct from earnings codes for non-FLSA premiums. Commingling FLSA and non-FLSA overtime premiums overstates the code TT amount and produces an incorrect deduction amount for employees.
Configure the W-2 reporting module to map the FLSA premium earnings code to Box 12 code TT. The payroll system's year-end W-2 module must be configured to pull the year-to-date total from the FLSA premium earnings code into Box 12 code TT. This configuration should be tested with a sample employee before year-end.
Exclude exempt employees from code TT population. The system should not generate a code TT entry for employees classified as exempt from FLSA overtime. If the system generates code TT amounts for exempt employees, those amounts are incorrect and will generate questions from employees and potentially from the IRS.
Establish a mid-year reconciliation process. By July 2026, payroll should be able to produce a report showing year-to-date FLSA overtime premium by employee. Run that report now and reconcile it against the general ledger's overtime expense accounts. Any discrepancy between the premium tracking and the GL is a signal of a payroll configuration error that needs to be corrected before the full year accumulates.
What Are the Other New 2026 W-2 Codes: TA (Trump Accounts) and TP (Tips)?
Code TT is one of three new Box 12 codes on the 2026 Form W-2. Understanding all three in context helps payroll teams configure the W-2 module correctly and avoid confusing the codes.
Code TA: Trump Account employer contributions. Box 12 code TA reports the total amount of Section 128 employer contributions made to the Trump Accounts of employees' eligible dependents during the year. This is the code discussed in the separate Trump Account blog in this cluster. The amount is excluded from Box 1 taxable wages. It is informational for the employee's tax return.
Code TP: Total cash tips reported to employer. Box 12 code TP reports the total amount of cash tips that the employee reported to the employer during the year (for employees in tipping occupations). The 2026 Form W-2 also adds Box 14b for the Treasury Tipped Occupation Code, which employers must include for employees reporting tips.
Code TT: Total qualified overtime compensation. Box 12 code TT, as described throughout this post, reports the total FLSA overtime premium. Unlike code TA, the code TT amount is not excluded from Box 1. It is already included in Box 1 and code TT simply identifies the deductible portion.
The three new codes reflect three separate OBBBA provisions that created new federal tax benefits requiring employer reporting to substantiate employee deductions: the no-tax-on-overtime deduction (TT), the no-tax-on-tips deduction (TP), and the Trump Account employer contribution exclusion (TA). All three codes are on the finalized 2026 Form W-2.
What Is the Penalty Exposure for Incorrect or Missing Code TT Reporting?
The general information reporting penalties under IRC Section 6721 and 6722 apply to incorrect or missing Box 12 code TT reporting. These are the same penalties that apply to other W-2 errors.
For 2026, the penalty amounts under Sections 6721 and 6722 for failure to file correct information returns and failure to furnish correct payee statements:
Failure corrected within 30 days: $60 per return, maximum $250,500 per year for small businesses (under $5 million in gross receipts).
Failure corrected by August 1 (for 2026 W-2s due February 1, 2027): $130 per return, maximum $630,500 per year for small businesses.
Failure not corrected by August 1: $330 per return, maximum $1,261,000 per year for small businesses. For larger businesses the caps are higher.
Intentional disregard: $660 per return with no maximum.
For employers with large non-exempt workforces where code TT is material for many employees, the per-return penalties add up quickly at scale.
Additionally, incorrect code TT reporting affects employees directly: an understated code TT amount reduces the employee's available deduction, and an overstated amount could produce a deduction the employee is not entitled to. Either error can generate downstream issues for employees who are audited or who receive IRS correspondence about their qualified overtime deduction.
The O'Neil Cannon analysis is the clearest statement of the transition: 2025 penalty relief was explicit and tied to a specific notice. That relief is not available for 2026. Employers that do not comply with the mandatory code TT reporting requirement for 2026 W-2s have direct penalty exposure under existing information reporting rules.
How Do You Reconcile Box 12 Code TT to Your Payroll Records at Year-End?
The year-end reconciliation for code TT should follow the same process used for other W-2 Box 12 reconciliations.
The starting point is the year-to-date FLSA overtime premium by employee from the payroll system's dedicated earnings code. That total should tie to two other figures: the cumulative overtime premium amounts on employee pay stubs throughout the year, and the overtime premium component of the overtime expense in the general ledger.
Reconciliation steps:
Pull the year-to-date report from the payroll system showing the FLSA overtime premium by employee.
Compare the total FLSA overtime premium to the overtime premium component of the GL. The GL overtime account typically includes both the regular-rate and premium portions of overtime wages. The premium portion should be identifiable through the payroll earnings code configuration.
For any employee where the GL and payroll report do not reconcile, investigate whether the payroll earnings code was applied correctly throughout the year. Common errors: the premium code was applied to non-FLSA overtime, the premium code was not applied to some FLSA overtime payroll runs, or exempt employees were incorrectly included.
Confirm that exempt employees have a zero balance in the FLSA premium code. No exempt employee should have a code TT amount.
For multi-state employers: if any adjustments were made to the FLSA premium for state-law overtime situations, confirm those adjustments correctly excluded the non-FLSA portions from the code TT total.
Run the W-2 preview report in the payroll system and compare each employee's Box 12 code TT amount to their year-to-date FLSA premium from the payroll report. Any discrepancy indicates a W-2 mapping configuration error that needs to be corrected before W-2s are issued.
The IRS cross-references FLSA classification in audits of code TT. A code TT amount for an employee who is classified as FLSA-exempt in any employment records is an audit flag. The reconciliation process should include a check of FLSA status for all employees with code TT entries.
What Should Employees Know About Code TT and Their Form 1040?
Employers are not responsible for providing tax advice to employees, but payroll and HR teams will receive employee questions about code TT. Having clear, accurate answers ready reduces the volume of those questions.
The key points employees need to understand:
Code TT shows the FLSA overtime premium earned during the year. It represents the half-time portion of time-and-a-half overtime, not the full overtime pay.
The amount in Box 12 code TT is already included in Box 1 total wages. The employee paid withholding and payroll taxes on the full amount, including the code TT portion. Code TT identifies how much of Box 1 is eligible for the deduction on their Form 1040.
To claim the deduction, the employee enters the code TT amount on Schedule 1-A, Part III. The deduction is capped at $12,500 ($25,000 for joint filers) and phases out at higher income levels. The employee may not be able to deduct the full code TT amount if their income exceeds the phase-out threshold.
Social Security tax, Medicare tax, and state income tax are still owed on overtime. The no-tax-on-overtime deduction reduces only federal income tax. It does not affect payroll taxes.
Employees who believe their code TT amount is incorrect should contact payroll, not the IRS, as the employer is responsible for the calculation and reporting. The IRS compares the code TT amount reported by the employer to the deduction the employee claims. Discrepancies can generate IRS correspondence.
Frequently Asked Questions
What is W-2 Box 12 code TT?
Box 12 code TT on the 2026 Form W-2 reports the total amount of qualified overtime compensation paid to a non-exempt FLSA employee during the year. Qualified overtime compensation is the premium portion of FLSA-required overtime pay: the extra half above the regular rate in time-and-a-half pay. The amount in code TT is already included in Box 1 total wages. Code TT identifies the portion that may be deductible on the employee's Form 1040 under the OBBBA's no-tax-on-overtime deduction.
What overtime qualifies for the no tax on overtime deduction?
Only overtime required under Section 7 of the FLSA, paid to an employee who is both covered by and not exempt from the FLSA's overtime requirements. The qualifying amount is the premium portion (the half in time-and-a-half), not the full overtime pay. Overtime required by state law beyond FLSA minimums, overtime required by collective bargaining agreements beyond FLSA, voluntary employer overtime premiums, and overtime paid to exempt employees do not qualify.
Is state-law overtime or collective bargaining overtime included?
No. The IRS FAQ on qualified overtime confirms that an individual who is ineligible for overtime under the FLSA does not receive qualified overtime compensation regardless of other laws or circumstances providing for overtime pay. State-law-only overtime and CBA overtime that exceeds FLSA requirements are not qualified overtime for code TT purposes.
What is the penalty for failing to report code TT on W-2s?
The standard information reporting penalties under IRC Sections 6721 and 6722 apply. Penalties range from $60 per return (corrected within 30 days) to $330 per return (not corrected by August 1 following the filing deadline) to $660 per return for intentional disregard. The 2025 transition penalty relief under Notice 2025-62 is not available for 2026.
How do employees use the Box 12 code TT amount on their tax return?
Employees use the code TT amount to claim the no-tax-on-overtime deduction on Schedule 1-A, Part III of their Form 1040. The deduction is capped at $12,500 per person ($25,000 for joint filers) and phases out for taxpayers with modified adjusted gross income above $150,000 (single) or $300,000 (joint). The code TT amount represents the maximum amount the employee could potentially deduct, before applying the cap and phase-out.
Key Takeaways
- For tax year 2026, W-2 Box 12 code TT is mandatory for all employers that pay FLSA-required overtime to non-exempt employees. The 2025 transition relief under IRS Notice 2025-62 is gone. The finalized 2026 Form W-2 instructions published in January 2026 establish code TT as a required reporting field.
- Code TT reports the FLSA overtime premium: the extra half in time-and-a-half pay. It reports only the premium, not the full overtime pay. The full overtime pay is already included in Box 1. Code TT is not an exclusion from wages.
- Only FLSA-required overtime qualifies. State-law overtime, CBA overtime that exceeds FLSA, voluntary employer overtime premiums, and any overtime paid to exempt employees do not qualify and must not be included in code TT.
- Payroll systems need a dedicated earnings code for the FLSA overtime premium, separate from all other overtime and premium pay codes, configured to populate Box 12 code TT on the year-end W-2 and to exclude exempt employees.
- The Section 6721 and 6722 information reporting penalties apply to incorrect or missing code TT reporting. Per-return penalties of $330 or more apply to errors not corrected by August 1 following the W-2 filing deadline.
- The other two new 2026 Box 12 codes are TA (Trump Account employer contributions, excluded from Box 1) and TP (total cash tips reported to employer). Unlike TA, the code TT amount is not excluded from Box 1 wages.
- The no-tax-on-overtime deduction is currently scheduled to sunset after 2028. The mandatory code TT reporting requirement runs for the same period.
