Auto Mechanic Overtime Tax Deduction Calculator
Run your real overtime numbers below. The estimate applies the same Schedule 1-A math as your federal return — no tax software, no signup.
The short answer: Luis — at the scenario numbers pre-loaded below, the OBBBA deduction is $4,680, worth about $1,030 in federal income tax at a 22% marginal rate ($40 per biweekly paycheck). Exact figures update live as you change the inputs.
Regular rate (not OT rate)
Hours worked beyond 40/week
Modified Adjusted Gross Income
Overtime Premium Deduction
$4,680
✅ You qualify for the full deduction
⚠️ This calculator provides estimates for informational and educational purposes only. It is not tax advice. Results are based on the One Big Beautiful Bill Act (OBBBA) and IRS Schedule 1-A. Consult a qualified tax professional for your specific situation.
What Counts (and What Doesn't)
Flat-rate pay makes the OT question subtle: only hours your employer actually pays as overtime premium count, not extra flag hours at straight rate. If your shop pays time-and-a-half on flagged hours beyond 40, that premium is deductible; production bonuses generally are not overtime premium unless your contract says so.
The full rules, caps and phase-outs for every deduction are in one table on the OBBBA rules page.
Worked Example
Luis flags flat-rate hours at an equivalent of $26/hour and stays late enough to log about 360 overtime hours a year.
- • Deductible amount: $4,680
- • Federal income tax savings: $1,030 (at the 22% marginal rate)
- • Per biweekly paycheck: $40
Every dollar of that comes off federal income tax while FICA still applies — the calculator above runs the same caps and phase-outs your return will.
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Frequently Asked Questions
How does flat-rate pay interact with the overtime deduction?
The deduction covers overtime premium actually paid. If your shop pays time-and-a-half for flagged hours beyond 40/week, that premium counts. Extra flag hours paid at straight time are not overtime premium and do not count, even if you worked more than 40 hours.
Do I need to itemize deductions to claim the overtime deduction?
No. The overtime premium deduction is an above-the-line adjustment on Schedule 1-A — you can take the standard deduction and still claim it in full.