March 7, 2026 · 10 min read
How to Calculate Your Overtime Tax Deduction: Step-by-Step Guide
Quick Math
If you get time-and-a-half: Total OT pay ÷ 3 = Your deduction. That's the shortcut. Read on for the full breakdown.
The overtime tax deduction under the OBBBA could save you hundreds to thousands — but only if you calculate it correctly. For 2025, most employers didn't separately report your overtime premium, so you need to figure it out yourself. Here are three methods.
Understanding What's Deductible
The deduction covers the premium portion only — the extra amount above your base rate. Here's the key concept:
Base rate: $20/hr
OT rate (1.5x): $30/hr
Premium (deductible): $30 - $20 = $10/hr
Only the $10 premium is deductible — NOT the full $30.
Method 1: The Pay Stub Method (Most Accurate)
If you have access to your pay stubs — even digital ones from your payroll portal — this is the gold standard.
- Add up all overtime hours for the tax year (Jan 1 – Dec 31, 2025)
- Find your base hourly rate — your regular rate before overtime kicks in
- Calculate the premium per hour — for 1.5x, it's 0.5 × base rate. For 2x, it's 1.0 × base rate.
- Multiply: OT hours × premium rate = deductible amount
- Cap it: Maximum $12,500 (or $25,000 if married filing jointly)
Example: $25/Hour Construction Worker
- Base rate: $25/hr
- OT rate (1.5x): $37.50/hr
- Premium: $12.50/hr
- OT hours worked in 2025: 520 hours (avg 10 hrs/week)
- Deductible amount: 520 × $12.50 = $6,500
- Tax savings at 22% bracket: $1,430
Method 2: The Divide-by-3 Shortcut
If you know your total overtime gross pay (not hours, but dollars) and you receive standard time-and-a-half:
Total OT Gross Pay ÷ 3 = Deductible Premium
Why? Because the premium (0.5x) is exactly ⅓ of the total OT rate (1.5x).
For double-time: Divide by 2 instead (the premium is half of double-time).
For mixed rates: Calculate each rate separately and add them up.
Three Wage Examples Using the Shortcut
| Base Rate | OT/Week | Annual OT Gross | ÷ 3 = Deduction | Tax Saved (22%) |
|---|---|---|---|---|
| $15/hr | 8 hrs | $9,360 | $3,120 | $686 |
| $25/hr | 10 hrs | $19,500 | $6,500 | $1,430 |
| $40/hr | 12 hrs | $37,440 | $12,480* | $2,746 |
*Nearly hitting the $12,500 annual cap
Method 3: If Your Employer Reports It
Some employers have voluntarily reported overtime premium in W-2 Box 14 for 2025. Starting in 2026, it will be required in Box 12, Code TT.
If you see a value labeled something like "OBBBA OT," "Qual OT Comp," or "OT Premium" in Box 14 — that's your number. Use it directly on Schedule 1-A.
⚠️ Common Mistake
If Box 14 shows an amount equal to your TOTAL overtime pay (not just the premium), your employer made an error. The deductible amount should be roughly ⅓ of your total overtime pay for time-and-a-half. If the number looks too high, calculate it yourself using Method 1 or 2.
Income Phase-Out: Check Before You Celebrate
The deduction phases out for higher earners:
- Full deduction: MAGI under $150,000 ($300,000 joint)
- Partial deduction: MAGI between $150,000-$200,000 ($300,000-$400,000 joint)
- No deduction: MAGI over $200,000 ($400,000 joint)
MAGI = Adjusted Gross Income + certain excluded income. For most W-2 workers, it's close to your AGI on line 11 of Form 1040.
Skip the Math — Let Us Calculate It
Enter your wage, hours, and filing status. Get your exact deduction and tax savings in 60 seconds.
Free OBBB Calculator →5 Common Calculation Mistakes
- Deducting ALL overtime pay. Only the premium portion qualifies — not your base rate earned during OT hours.
- Forgetting the annual cap. $12,500 max ($25,000 joint). High earners with lots of OT hit this fast.
- Not checking MAGI phase-out. If you earn over $150K, your deduction shrinks.
- Including non-FLSA overtime. Voluntary extra hours without legally-required premium pay don't count.
- Trusting incorrect W-2 Box 14 amounts. Verify against your pay stubs — some employers got it wrong in year one.
How to File: Schedule 1-A
Report your qualified overtime compensation deduction on the new IRS Schedule 1-A. This form was created specifically for OBBBA deductions. It attaches to your Form 1040 and reduces your adjusted gross income — meaning it works whether you take the standard deduction or itemize.
Frequently Asked Questions
How do I calculate my overtime tax deduction for 2025?
For time-and-a-half, divide your total overtime gross pay by 3 to get the deductible premium. For pay stub accuracy, multiply OT hours by the premium rate (OT rate minus base rate). Cap at $12,500 ($25,000 joint).
What if my employer didn't report overtime separately on my W-2?
For 2025, employers aren't required to separately report overtime. Use your pay stubs and IRS Notice 2025-69 methods. Starting 2026, it will appear in W-2 Box 12, Code TT.
What is the divide-by-3 shortcut?
For standard 1.5x overtime, the premium (0.5x) is ⅓ of total OT pay (1.5x). So dividing total OT gross pay by 3 gives you the deductible amount. For double-time, divide by 2.