California has the most generous overtime law in the country, and that’s exactly why the federal “no tax on overtime” deduction confuses so many California workers and payroll departments. A warehouse lead in Fontana who works ten-hour days earns California daily overtime from the ninth hour on. The federal deduction doesn’t care about daily overtime. It follows the Fair Labor Standards Act, which counts only hours over 40 in a workweek, and only the half-time premium on those hours. The IRS confirmed that approach in August 2026 when it replaced its January guidance with Fact Sheet FS-2026-13, and starting with 2026 wages, the number on the employee’s Form W-2 largely controls the deduction.
What does the federal overtime deduction allow?
The One Big Beautiful Bill Act added 26 U.S.C. § 225. For 2025 through 2028, it allows a deduction of as much as $12,500 of qualified overtime compensation, with a $25,000 ceiling for married couples filing jointly. Once modified adjusted gross income passes $150,000 ($300,000 joint), the ceiling shrinks by $100 per $1,000 of excess income. Claiming it requires a work-authorized Social Security number and, for married taxpayers, a joint return, but non-itemizers can take it.
“Qualified overtime compensation” is narrow by design. The statute limits it to overtime required under section 7 of the FLSA that exceeds the regular rate. FAQ 12 of the fact sheet turns that into a formula: FLSA hours over 40 in the workweek, times one-half, times the FLSA regular rate. On a time-and-a-half hour, only the extra half counts.
Why doesn’t California daily overtime count?
Labor Code § 510 requires time and a half after eight hours in a day, after 40 hours in a week, and for the first eight hours on the seventh consecutive workday, plus double time after 12 hours in a day and after eight hours on the seventh day. The FLSA requires none of the daily pieces. FAQ 16 of the IRS fact sheet addresses this directly: overtime an employer pays under state law, a union contract, or its own policy qualifies only to the extent it’s needed to satisfy the federal requirement, and the IRS specifically calls out premiums for hours beyond eight in a workday. In the fact sheet’s own example, a $20-an-hour worker puts in 50 hours and receives $400 of double-time pay for the 10 extra hours, and only $100 of it qualifies.
California’s state income tax doesn’t follow any of this. The Franchise Tax Board’s summary of federal tax changes lists California as not conforming to the overtime deduction, though it does conform to the related information reporting rules. California’s conformity date is January 1, 2025, which predates the federal law. Two 2026 bills that would have created a state version, AB 1550 and AB 2336, stalled in committee in April 2026. For now, California taxes every dollar of overtime.
Which California workers get state overtime but no federal deduction?
More of them than most payroll teams realize. The four-day, ten-hour schedule is the simplest case. A worker on four tens without a valid alternative workweek election under Labor Code § 511 earns eight hours of California daily overtime each week, but works exactly 40 FLSA hours, so the federally qualified amount is zero.
Logistics workers present a subtler gap. The FLSA motor carrier exemption in 29 U.S.C. § 213(b)(1) reaches drivers, driver’s helpers, loaders, and mechanics whose work affects the safety of interstate vehicles, according to the Labor Department’s Fact Sheet 19. California’s Wage Order 9 removes overtime only for employees whose own hours are regulated by federal or CHP hours-of-service rules, which usually means drivers. So a dock loader or yard mechanic at an Ontario carrier can be owed full California overtime while qualifying for nothing federally. Central Valley farmworkers are another example: California agricultural overtime reached the full eight-hour and 40-hour standard in 2022 for employers with more than 25 workers and in 2025 for smaller ones, but the FLSA exempts most agricultural labor.
Salaried employees can fall into the gap too. A Sacramento operations manager earning $112,000 may satisfy the federal highly compensated employee test while spending most of the day on nonexempt work, which makes the manager nonexempt under California’s “primarily engaged” rule. That manager is owed California overtime with a Code TT amount of zero. And the IRS’s 20% owner rule in FAQ 5 treats an employee with a bona fide 20% equity stake who actively manages the business as an exempt executive, which matters for family businesses that put owners on hourly payroll.
| Worker | California overtime owed? | Federal qualified overtime (Code TT)? |
|---|---|---|
| Warehouse worker, five 10-hour days (50 hours) | Yes, 10 hours at 1.5x | Yes, 10 hours of half-time premium |
| Four 10-hour days, no valid alternative workweek | Yes, 8 hours at 1.5x | No, only 40 FLSA hours |
| Hour 13 of a single workday | Double time | Only the FLSA half-time amount, if the week exceeds 40 |
| Dock loader or mechanic at an interstate motor carrier | Generally yes | No, FLSA motor carrier exemption |
| Interstate truck driver subject to DOT hours-of-service rules | Generally no, Wage Order 9 § 3(L) | No |
| Farmworker working 60 hours in a week | Yes | Generally no, FLSA agricultural exemption |
| Hourly employee who owns 20% and manages the company | Depends on California exemption tests | No, IRS FAQ 5 |
What does the Code TT number look like for a Fontana warehouse worker?
Take a single worker at $24 an hour with no alternative workweek. For 36 weeks of the year she works five ten-hour days. For 12 weeks she works four ten-hour days plus one 13-hour day. In a 50-hour week, California pays ten hours at $36, and the FLSA-required premium is also ten hours at $12, or $120, so the two laws line up. In the 53-hour week they split. California pays 12 hours at time and a half and one hour at double time, a $168 premium, while the FLSA requires only 13 hours at the $12 half-time rate, or $156.
Across the year, her gross pay is $64,800, her California overtime premiums total $6,336, and her Box 12, Code TT amount should be $6,192. Using the 2026 single standard deduction of $16,100, her federal taxable income drops from $48,700 to $42,508, which is still inside the 12% bracket, so the deduction saves $743.04. California taxes the full $64,800. Compare a coworker who loads trucks for the company’s interstate carrier at $26 an hour and works 50-hour weeks for 48 weeks. If the motor carrier exemption applies to him, he collects $6,240 of California overtime premium and has a Code TT figure of zero.
What if the W-2 amount is wrong?
For 2026 and later, the worker is stuck with the lesser of what was actually paid and what’s reported in Box 12, Code TT, under FAQs 20 through 23. If the employer overstates it, the deduction is still limited to the real amount. When the employer reports too little, the worker has to get a Form W-2c, because FAQ 23 rules out filing Form 4852 as a substitute. FAQ 11 requires employers who find an error to issue the W-2c, and information return penalties under 26 U.S.C. §§ 6721 and 6722 apply to uncorrected forms.
California employers have one extra complication. Alvarado v. Dart Container Corp. of California (2018) 4 Cal.5th 542 requires flat-sum bonuses to be folded into the overtime rate using only nonovertime hours as the divisor, which produces a higher number than the federal method. In a 50-hour week at $24 with a $50 attendance bonus, California requires about $13.75 more than the FLSA does, and that $13.75 isn’t qualified. Payroll systems built around California rules will overstate Code TT unless they run a separate federal calculation.
What should employers and employees do now?
Employers should confirm that payroll can calculate FLSA overtime by workweek, separate from California daily overtime and double time, and should review which workers fall under the motor carrier, agricultural, and executive exemptions federally even when California overtime is paid. Expect questions when the wage statement shows 1.5x and 2x hours but the W-2 shows a smaller Code TT figure. Employees shouldn’t reduce withholding automatically: FAQs 8 and 9 say employers keep withholding unless a new Form W-4 is filed, and anyone who lowers federal withholding for the deduction shouldn’t carry that change onto the California DE 4, since the state won’t allow it. If your company also has repayment or correction issues pending, our post on California’s stay-or-pay law walks through the W-2c mechanics.
Frequently Asked Questions
Does California allow the no tax on overtime deduction?
No. California doesn’t conform to the federal overtime deduction, so overtime remains fully taxable on the California return. Bills to create a state version stalled in committee in April 2026.
Does California daily overtime qualify for the federal deduction?
Only the portion the FLSA would require. Daily overtime after eight hours and double-time premiums qualify only to the extent of the half-time premium on hours over 40 in the workweek.
What is Box 12, Code TT on my W-2?
It reports qualified overtime compensation, the FLSA half-time premium on hours over 40. Starting with 2026, your deduction is limited to the lesser of that amount and what you were actually paid.
Can I use my own time records if my employer’s Code TT figure is too low?
No. Ask your employer to issue a Form W-2c. According to the IRS, Form 4852 can’t be used to increase the reported amount for this deduction.
Do truck drivers get the federal overtime deduction?
Usually not. Drivers, loaders, and mechanics covered by the FLSA motor carrier exemption have no FLSA overtime, so none of their overtime qualifies, even if California or the employer pays overtime.
How much can I deduct?
The cap is $12,500 per year for single filers and $25,000 for joint returns through 2028. It phases down as modified AGI rises above $150,000, or $300,000 for couples.
How North Star Law Firm Can Help
North Star Law Firm helps California employers sort out payroll tax reporting, worker classification, and information return corrections, and it represents businesses when EDD or IRS payroll issues turn into assessments. Phillip Zagotti is a California attorney and a CPA, so the wage-and-hour question and the W-2 reporting question get answered together. Learn more about the firm’s sales and payroll tax practice, its penalty abatement work, and the wider Tax Law practice, or schedule a consultation to review your payroll setup before year-end W-2s.