What is code TT on W-2?
On your federal Form W-2, W-2 Box 12 is used by employers to report various non-taxable benefits, elective deferrals, and specialized wage items. Starting with tax year 2026, Box 12 Code TT reports the total qualified overtime compensation paid to you during the calendar year, as codified under Internal Revenue Code (IRC) § 6051(a)(19). Under IRS payroll reporting rules, this code captures qualified overtime so eligible workers can claim the federal overtime deduction on their annual income tax returns. Notably, during the 2025 transition year before code TT became mandatory, employers could report this exact same amount in Box 14 instead.
The most important principle to understand about Box 12 Code TT is that it represents the FULL premium total paid to you, not your allowable deduction. Your employer does not calculate your personal tax caps, does not know your spouse's income, and does not compute your income phase-outs. The number entered by payroll is simply the raw statutory sum of eligible overtime premiums earned between January 1 and December 31. The statutory deduction caps ($12,500 single / $25,000 joint) and Modified Adjusted Gross Income (MAGI) phase-outs are applied later by you on Schedule 1-A (Form 1040) when filing your taxes.
This reporting standard was formally instituted by the Department of the Treasury through IRS Revenue Procedure 2026-27, which introduced two complementary reporting codes for 2026 payroll forms:
- Code TT: Qualified overtime compensation paid under federal FLSA mandates.
- Code TP: Qualified tip compensation eligible for companion tax deductions.
For the 2026 tax year, employers must distribute the official W-2 form to employees by February 1, 2027 (because January 31, 2027 falls on a Sunday). When examining your paper or electronic copy, code TT typically appears in Box 12a (or Boxes 12b, 12c, or 12d), paired with a capital "TT" in the code column and a dollar figure beside it.
What Counts as Qualified Overtime
Under IRC § 225 and IRS Fact Sheet FS-2026-13 (issued August 6, 2026), the definition of qualified overtime compensation is strictly anchored to federal labor law. It covers ONLY the premium required by the federal Fair Labor Standards Act (FLSA) under 29 U.S.C. § 207:
Qualified Overtime = 0.5 × Regular Hourly Rate × Physical Hours Worked Over 40 in a WorkweekOnly the extra "half" in time-and-a-half qualifies. The 1.0× straight-time base hourly pay remains fully taxable compensation.
When you work 50 hours in a workweek, your overtime pay is divided into two distinct components: the base regular wage (which you would have earned whether or not overtime applied) and the overtime premium slice. Only the extra half-time premium required by federal statute qualifies for Code TT.
The IRS Worked Example: Double Time
To eliminate ambiguity regarding employer overtime bonuses and double-time arrangements, the IRS provided a definitive worked example in Fact Sheet FS-2026-13:
An employee whose regular rate of pay is $20.00 per hour works 50 hours in a single workweek (10 overtime hours). Under the employer's company policy or union collective bargaining agreement, all overtime hours are paid at double time (2.0× or $40.00/hour).
The employee receives $400.00 of total overtime pay (10 hours × $40.00/hr). However, the FLSA mandates only time-and-a-half (1.5×), which represents a premium of one-half the regular rate (0.5 × $20.00 = $10.00/hr). Therefore, only $100.00 (10 hours × $10.00/hr) is qualified overtime compensation. The remaining $300.00 ($200.00 base pay + $100.00 contractual bonus) does not qualify.
What Does NOT Count as Qualified Overtime
Any overtime pay resulting from state laws, union agreements, or voluntary employer policies that exceed the basic federal 40-hour requirement cannot be included in Box 12 Code TT:
- State-Only Daily Overtime: Under California Labor Code § 510, overtime is paid after 8 hours in a workday. If a worker puts in four 10-hour shifts (40 total weekly hours), California mandates 8 hours of daily overtime. However, because total weekly hours did not exceed 40, $0 of that pay qualifies under federal law.
- Union-Contract and Double-Time Premiums: Extra premiums negotiated under collective bargaining agreements (such as 2.0× double time on Sundays or seventh consecutive days) do not qualify beyond the federal 0.5× rate.
- Weekend, Holiday, and Call-In Premiums: Extra pay for working Saturdays, Sundays, or holidays does not qualify unless the hours physically push the employee over 40 physical hours in that 7-day workweek.
- Shift Differentials and Discretionary Bonuses: Night-shift differentials or hazard premiums paid as flat rate bonuses do not count as qualified overtime.
Salaried Employees: Salaried exempt employees (those categorized under executive, administrative, or professional exemptions under FLSA regulations) get nothing because they have no statutory FLSA overtime entitlement. However, salaried non-exempt employees who are legally entitled to overtime can qualify — use our salaried overtime calculator to determine your exact non-exempt regular rate and qualifying premium amounts.
2025 vs 2026: The Rules Changed
How you document and claim your overtime deduction depends entirely on the tax year of your return. In 2025, the IRS treated the provision as a transition period. Starting with tax year 2026, the regime is fully automated and strictly policed:
Pay Stubs & Self-Computation
- Employer Reporting Optional: Employers were NOT required to track or report overtime premiums on Form W-2 (penalty relief granted under IRS Notice 2025-62).
- Self-Computation Allowed: Workers could calculate their own deductible premium from year-end pay stubs under IRS Notice 2025-69:
• Total time-and-a-half pay ÷ 3 = deductible premium
• Total double-time pay ÷ 4 = deductible premium - Informal Box 14 Notes: Some employers voluntarily noted figures in Box 14 under labels like "QUAL OT" or "FLSA OT Prem", or attached a separate paper memo.
Mandatory W-2 Code TT Controls
- Box 12 Code TT Mandatory: Employers are legally required to calculate and report qualified FLSA overtime under Rev. Proc. 2026-27.
- The W-2 Form CONTROLS: You may NOT deduct more than the figure shown in Box 12 Code TT, even with perfect pay stubs or timecard records.
- Form 4852 Prohibited: Filing IRS Form 4852 (Substitute W-2) does NOT satisfy the statutory reporting requirement for Code TT.
- Form W-2c Is the Only Fix: If Code TT is omitted or understated, the only legal remedy is an official corrected Form W-2c from your employer.
- Overstatement Rule: If your employer accidentally overstates Code TT, you may only claim what was genuinely paid under FLSA rules.
Caps, Phase-Out and Who Can Claim
Under IRC § 225, Congress established statutory ceilings and income limitations to ensure the overtime tax deduction benefits working- and middle-class households:
| Tax Filing Status | Annual Deduction Cap | Phase-Out Begins (MAGI) | Fully Phased Out (MAGI) |
|---|---|---|---|
| Single | $12,500 / year | $150,000 | $275,000 |
| Married Filing Jointly | $25,000 / year | $300,000 | $550,000 |
| Head of Household | $12,500 / year | $150,000 | $275,000 |
| Married Filing Separately | $0 (Disqualified) | N/A | N/A |
Having a Box 12 Code TT higher than $12,500 is completely normal. In Fact Sheet FS-2026-13, the IRS explicitly highlights an example where a single taxpayer's W-2 reports $30,000 in Box 12 Code TT. The taxpayer simply enters $30,000 on line 14a of Schedule 1-A and applies the statutory cap on line 15, taking the maximum allowable deduction of $12,500.
Core Eligibility Rules
- Valid Social Security Number (SSN) Required: Every taxpayer claiming the deduction must have a valid SSN issued on or before the due date of the return. Individual Taxpayer Identification Numbers (ITINs) do not qualify. On married filing jointly returns where both spouses earned overtime, both spouses must have valid SSNs.
- Married Couples Must File Jointly: Married individuals who file separately receive an automatic $0 deduction under the statute.
- Available to Non-Itemizers: You can claim the overtime deduction regardless of whether you take the standard deduction or itemize your deductions on Schedule A.
- Phase-Out Rate: For every complete $1,000 your Modified Adjusted Gross Income (MAGI) exceeds $150,000 ($300,000 for joint filers), your allowable deduction is reduced by $100.
Worked example: cap first, then phase-out
Elizabeth is single. Her W-2 shows $14,876 of qualified overtime and her total wages for the year were $156,986.
Her qualified overtime ($14,876) exceeds the single-filer cap, so line 15 is $12,500.
min($14,876, $12,500) = $12,500.00Her MAGI of $156,986 is $6,986 over the $150,000 threshold; $6,986 ÷ $1,000, rounded down, is 6, so the reduction is 6 × $100 = $600.
floor(($156,986 − $150,000) / 1,000) × $100 = 6 × $100 = $600.00Subtracting the phase-out reduction from the capped premium yields her final deduction:
$12,500.00 − $600.00 = $11,900.00 Overtime DeductionHow to Claim It, Step by Step
Claiming your deduction on your federal income tax return is handled through Schedule 1-A (Form 1040), Part III (Qualified Overtime Compensation Deduction):
Enter Box 12 Code TT Total
Copy the exact dollar amount reported in Box 12 with Code TT from your primary Form W-2. If you worked multiple jobs, enter the figures from each W-2 on lines 14a, 14b, etc.
Total Qualified Overtime
Sum all Box 12 Code TT entries across all W-2 forms received during the tax year.
Apply Statutory Cap
Enter the smaller of your line 14c total or your filing status cap ($12,500 for Single / Head of Household; $25,000 for Married Filing Jointly).
Compute MAGI Phase-Out
If your Modified Adjusted Gross Income exceeds $150,000 ($300,000 joint), calculate your phase-out reduction ($100 per full $1,000 over threshold).
Allowable Overtime Deduction
Subtract line 20 from line 15. This is your allowable deduction, which flows through Schedule 1-A line 38 directly onto Form 1040, line 13b.
If you use tax preparation software such as TurboTax, H&R Block, or TaxSlayer, typing "TT" and the dollar amount into your W-2 data entry screen will automatically populate Schedule 1-A without manual worksheet calculations. You can also model your numbers in advance using our interactive no tax on overtime calculator.
State plainly: this is a below-the-line deduction — it reduces taxable income, NOT AGI (several major financial websites erroneously report this as an above-the-line adjustment to gross income).
Because the deduction sits below AGI on Form 1040 line 13b, it does not lower your Adjusted Gross Income for AGI-sensitive calculations like student loan interest deductibility, medical expense floors, or IRA contribution limits. Furthermore, overtime pay itself stays fully subject to withholding and FICA during the year — for an in-depth explanation of why your overtime checks appear heavily withheld on pay day, see is overtime taxed more.
Your State Probably Still Taxes It
The "No Tax on Overtime" deduction is strictly a federal tax benefit under IRC § 225. Because the deduction sits below Adjusted Gross Income (AGI) on the federal Form 1040, the vast majority of state income tax systems — which use federal AGI as their statutory starting point — do not inherit the deduction.
As of October 2026, state tax conformity across the country falls into three distinct camps:
- Flow-Through States (5 States Only): The deduction flows through to state tax returns only in Idaho, Iowa, Montana, North Dakota, and Oregon, because these states link their tax codes to federal taxable income rather than federal AGI.
- Explicitly Decoupled or Non-Conforming States: States such as Colorado, Illinois, Rhode Island, District of Columbia, Georgia, Kentucky, Virginia, and New Jersey have passed statutory decoupling provisions or standard non-rolling conformity statutes, ensuring that overtime pay remains 100% subject to state income taxes.
- No Income Tax States: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming have no state wage income tax, so overtime is never taxed at the state level regardless of federal rules.
Default Advice: Unless you file a state tax return in Idaho, Iowa, Montana, North Dakota, or Oregon, you should expect state income tax to be calculated on your full overtime earnings. To review your specific state's income tax brackets and overtime rules, explore our state guides including Colorado, Illinois, Georgia, Virginia, and New Jersey, or browse the complete state overtime calculator hub.
Check Your W-2 in January — Before You File
Because the W-2 legally controls your federal overtime deduction for tax year 2026, reviewing your tax documents the moment they arrive in January is critical. Use this actionable four-step checklist:
Locate the cumulative year-to-date overtime premium on your final December 2026 pay stub. Calculate your FLSA premium slice (hours over 40 × half-time rate) and confirm that Box 12 Code TT closely matches that sum.
If you worked non-exempt overtime during 2026 and Box 12 has no Code TT entry, contact your employer's payroll department immediately. Under IRS Rev. Proc. 2026-27, employers must correct errors as soon as practicable.
Remember that no 2025-style safe harbor exists for 2026 returns. You cannot self-compute your deduction from pay stubs, and filing Form 4852 will not be accepted by the IRS for Code TT claims. Only an official Form W-2c (Corrected Wage and Tax Statement) protects your deduction.
Never file a tax return claiming an overtime deduction greater than what is printed in Box 12 Code TT. Doing so creates an automated IRS document matching discrepancy that will flag your return for audit and delay your tax refund for months.
Code TT and the Other Box 12 Codes
What does TT stand for in box 12A on W-2?
Code TT stands for qualified overtime compensation reported by your employer in Box 12a of your Form W-2 tax statement under IRS reporting guidelines. This specific alphanumeric entry represents the exact baseline figure from which the federal 'no tax on overtime' deduction is calculated on Schedule 1-A. It is critical to recognize that code TT covers overtime wages only—specifically the statutory Fair Labor Standards Act (FLSA) half-time (0.5×) premium slice of your total overtime pay. Crucially, TT does not include tips or customer gratuities of any kind: tip income is reported under its own distinct Box 12 code (code TP), while taxable cash tips and allocated gratuities are tracked separately in Box 7. Unlike pretax retirement codes or deferred compensation entries in Box 12 that reduce Box 1 gross pay, the dollar figure shown under code TT was already included in your Box 1 taxable wages throughout the payroll year. Under Treasury regulations, this reporting mechanism allows workers to claim an overtime tax deduction up to $12,500 for single filers ($25,000 for married couples) to secure their full overtime deduction at filing time.
What are the codes in box 12 on W-2?
The codes in Box 12 on your W-2 form are standardized IRS alphanumeric identifiers used by your employer to report specific non-wage compensation, benefit values, and retirement deferrals. While the official IRS instructions list more than 30 distinct payroll codes, most workers see only one to three on the employee's copy, and only a selective few directly alter your Box 1 taxable income or net federal income tax liability.
| Code | What It Reports | Affects Taxable Income? |
|---|---|---|
| D | Elective 401(k) deferrals (pretax deferred compensation) | Yes — Excluded from Box 1 |
| DD | Cost of employer health coverage and health insurance premiums | No — Informational only, untaxed |
| W | Employer and employee HSA pretax contributions | Yes — Excluded from Box 1 |
| AA | Designated Roth contributions under a 401(k) plan | No — After-tax, included in Box 1 |
| BB | Designated Roth contributions under a 403(b) plan | No — After-tax, included in Box 1 |
| EE | Designated Roth contributions under a governmental 457(b) | No — After-tax, included in Box 1 |
| FF | Permitted benefits under a QSEHRA | No — Informational benefit |
| GG | Income from qualified equity grants | Yes — Includible in gross income |
| HH | Deferred compensation under section 83(i) | No — Deferral balance |
| TA | Pension-linked emergency savings account (PLESA) distributions | No — Excluded distribution |
| TP | Qualified tip compensation for federal tips deduction | Yes — Below-the-line deduction |
| TT | Qualified overtime compensation for FLSA premium deduction | Yes — Below-the-line deduction |
What does TP mean in box 12 of W-2?
Code TP in Box 12 of Form W-2 designates qualified cash tips reported to your employer, establishing the baseline figure used to calculate the federal 'no tax on tips' deduction. Created as the sibling code to code TT under IRS Revenue Procedure 2026-27, code TP reflects voluntary customer gratuities eligible for a separate deduction capped at $25,000, paired with the worker's tipped-occupation code entered in new Box 14b. Do not confuse code TP with other look-alike boxes across your tax form: it is completely separate from federal income tax withheld recorded in Box 2, bears no relation to the payroll control number printed in Box D, and differs from Social Security wages tips reported in Boxes 3 and 7. Employers track these statutory reporting codes separately: payroll departments enter TP for qualifying tips and TT for qualifying overtime, and hospitality or service workers earning overtime wages on tipped shifts can easily have both entries side by side in Box 12. While code TP helps calculate your deduction at filing time, it does not reduce ongoing payroll federal tax withholding on regular paychecks.
Frequently Asked Questions: W-2 Box 12 Code TT
Answers to the most critical filing, reporting, and statutory questions regarding Box 12 Code TT and the federal overtime tax deduction:
What does Code TT mean on my W-2?
Code TT in Box 12 reports your total qualified overtime compensation paid during the tax year under IRC § 6051(a)(19) and Rev. Proc. 2026-27. It represents only the statutory Fair Labor Standards Act (FLSA) overtime premium slice — the additional half-time (0.5×) above your regular hourly rate for hours worked beyond 40 in a workweek, not your total overtime gross pay. For 2026 returns filed in early 2027, this figure is the official IRS benchmark used to claim the federal overtime deduction on Schedule 1-A (Form 1040).
My Box 12 Code TT is more than $12,500. Is that a mistake?
No. Employers are legally required to report the full cumulative qualified overtime premium paid to you during the year without applying statutory deduction limits. For example, if you earned $30,000 in qualifying FLSA overtime premiums, your W-2 will accurately display $30,000 in Box 12 Code TT. The statutory caps ($12,500 for single filers, $25,000 for married couples filing jointly) and any MAGI phase-outs are applied later when you or your tax preparation software (such as TurboTax or H&R Block) complete Schedule 1-A, Part III.
Can I claim the overtime deduction if my W-2 has no Code TT?
No. For tax year 2026 returns, IRS regulations dictate that Box 12 Code TT is mandatory and legally controls your deduction. While the 2025 transition year allowed workers to self-calculate qualifying overtime premiums from pay stubs under IRS Notice 2025-69, no such relief exists for 2026. Furthermore, filing an IRS substitute W-2 (Form 4852) does not satisfy the requirement. If Box 12 Code TT is missing or blank, you cannot claim the deduction until your employer provides an official corrected Form W-2c.
Does double time count for the overtime tax deduction?
Only the FLSA-mandated premium portion counts. Under IRC § 225 and IRS Fact Sheet FS-2026-13, qualified overtime compensation is strictly limited to the premium required by federal law — which is one-half times (0.5×) your regular rate for hours worked beyond 40 in a single workweek. Any additional compensation above that federal baseline — including the second half-time in double-time pay (2.0×), union contractual premiums, weekend premiums, or California daily double time — does not qualify and is excluded from Box 12 Code TT.
Is the overtime deduction above the line?
No. The federal overtime deduction under IRC § 225 is a below-the-line deduction. It is calculated on Schedule 1-A (Form 1040) line 21 and flows to Form 1040 line 13b, directly reducing your taxable income rather than your Adjusted Gross Income (AGI). It is available whether you take the standard deduction or itemize deductions. Because it sits below AGI, it does not alter AGI-based phase-out thresholds, and overtime pay remains 100% subject to standard federal and state payroll withholding and FICA taxes throughout the year.
What if my employer will not fix my W-2?
If your employer fails or refuses to correct an omitted or inaccurate Code TT figure, contact your payroll department in writing citing IRS Rev. Proc. 2026-27 and Notice 2025-62. If they do not issue a Form W-2c by late February 2027, you can contact the IRS directly at 800-829-1040. The IRS will initiate a formal W-2 complaint and send Form 4598 to the employer demanding a corrected Form W-2c. You should not file your return claiming a deduction greater than what appears in Box 12 Code TT without a matching W-2c on file.
This guide is general information, not tax advice. IRS guidance on the overtime deduction currently rests on Fact Sheet FS-2026-13 and Notices 2025-62 and 2025-69; final regulations have not been issued and the 2026 Schedule 1-A was not yet final when this guide was published. Figures verified against IRS sources, October 2026.