Chemical Plant Overtime Tax Deduction Calculator
For operators, lab techs, and maintenance crews pulling turnaround and shutdown overtime.
The short answer: At the scenario below, the OBBBA deduction is $7,650, worth $918 at a 12% rate ($35 per biweekly paycheck).
Regular rate (not OT rate)
Hours worked beyond 40/week
Modified Adjusted Gross Income
Overtime Premium Deduction
$7,650
✅ 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.
Turnaround Season Is the Deduction Season
Plant turnarounds routinely stack 60–80 hour weeks for 4–8 weeks. That concentrated OT premium is the single biggest deduction lever industrial workers have under the OBBBA.
- • Turnaround and shutdown hours past 40/week at 1.5× or 2× → premium portion deductible
- • Regular rotating 12s that stay under 40 → not OT
- • Per-diem and travel pay are not wages — excluded from the premium math
Worked Example
A married-joint operator at $34/hour, 450 OT hours mostly from one spring turnaround.
- • Premium $17 × 450 → $7,650 deduction (well under the $25,000 MFJ cap)
- • Savings $918 at the 12% rate
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Frequently Asked Questions
Is turnaround overtime deductible under the OBBBA?
Yes. Turnaround hours beyond 40/week paid at a premium are qualified overtime — the 0.5× portion is deductible up to $12,500 single / $25,000 MFJ.
Does double-time change the deduction?
The deduction base is the premium above your regular rate. Extra premium beyond 1.5× follows the qualified-OT premium dollars your employer reports.