Does Montana Tax Overtime in 2026?
No - Montana does not tax qualifying overtime premium pay under the OBBBA deduction in 2026. Montana computes its income tax starting from federal taxable income, so the federal overtime deduction (IRC §225, up to $12,500 single / $25,000 MFJ) automatically reduces your Montana tax base. Because Montana has a graduated rate structure with a top rate of 5.65%, overtime workers in Montana can save more per deducted dollar than in most flat-rate conforming states.
How Montana's Overtime Tax Treatment Works
Montana conforms to the OBBBA overtime deduction through structural flow-through. The state starts its income tax computation from federal taxable income - the figure from federal Form 1040, line 15. The OBBBA overtime deduction (IRC §225) is an above-the-line deduction for the premium portion of overtime wages. When a Montana worker claims this deduction on their federal return, it reduces federal taxable income before Montana’s calculation begins. No separate Montana legislation was needed; the deduction is automatically incorporated.
Montana’s graduated two-bracket structure makes the state savings calculation more nuanced than in flat-rate states. Montana applies 4.7% on the first $21,600 of taxable income and 5.65% on income above that threshold (single filer, TY2026, per HB 337). For most overtime workers with total income above the bracket threshold, the deduction saves at the higher 5.65% rate - providing greater per-dollar savings than flat-rate conforming states.
Montana also applies its own standard deduction ($5,540 single) and personal exemption ($3,000 single) after the federal taxable income starting point. These Montana-specific adjustments are independent of the OBBBA deduction and do not affect it. The overtime deduction is already embedded in the federal taxable income figure before Montana’s adjustments begin.
Federal Overtime Deduction Quick Reference
| Detail | Value |
|---|---|
| IRC Section | §225 (OBBBA) |
| Maximum deduction | $12,500 overtime ($25,000 MFJ) |
| Deduction type | Above-the-line (Schedule 1-A) |
| FICA still applies? | Yes (Social Security 6.2% + Medicare 1.45%) |
| MFS eligible? | No (MFJ or Single/HoH only) |
| Effective dates | Jan 1, 2025 – Dec 31, 2028 |
| Montana treatment | Conforms |
| What qualifies? | Overtime premium only (the 0.5x above regular rate), FLSA non-exempt employees |
Worked Examples Comparing Federal and Montana Treatment
Example 1: Logging worker with $7,500 in overtime premium (single filer, 12% federal bracket, income above $21,600 MT threshold)
Qualifying overtime premium: $7,500
Overtime deduction claimed: $7,500 (capped at $12,500)
Estimated federal tax savings: $900.00
Montana return:
State tax savings from deduction: $423.75
Montana’s graduated rate means savings depend on the worker’s taxable income level. At the 5.65% top rate, the $7,500 deduction saves $423.75 in Montana state tax. The deduction flows through from federal taxable income automatically.
Example 2: Mining worker with $12,500 in overtime premium (single filer, 22% federal bracket, income above $21,600 MT threshold)
Qualifying overtime premium: $12,500
Overtime deduction claimed: $12,500 (capped at $12,500)
Estimated federal tax savings: $2,750.00
Montana return:
State tax savings from deduction: $706.25
This worker claims the full $12,500 single-filer cap. At Montana’s 5.65% top rate, the state savings is $706.25 - one of the highest state-level overtime deduction savings among conforming states.
Montana-Specific Rules for Overtime Workers
Higher per-dollar savings: Montana’s 5.65% top rate provides more state-level savings per dollar of overtime deducted than most conforming states. A worker claiming the full $12,500 deduction at the top rate saves $706.25 in Montana state tax. Combined with federal savings, this makes the OBBBA overtime deduction particularly valuable for Montana workers.
Natural resources and extraction industries: Montana’s economy includes significant natural resources, mining, logging, and energy sectors where overtime work is common. Non-exempt workers in these industries who regularly earn overtime premium pay stand to benefit substantially from the OBBBA deduction, especially during peak operational periods.
Premium-only rule: Only the overtime premium is deductible. For a worker earning $24/hour regular pay and $36/hour overtime (time-and-a-half), only the $12/hour premium qualifies. Montana does not modify this federal limitation. The same premium calculation applies for both federal and Montana purposes.
No sales tax advantage: Montana is one of five states with no general sales tax. Overtime workers in Montana benefit from both the income tax deduction and the absence of sales tax on purchases, reducing their overall tax burden compared to workers in states with both income and sales taxes.
Related Tools
- No Tax on Overtime Calculator - calculate your federal overtime deduction
- Montana Tax Guide - full state tax overview
- Montana Paycheck Calculator
- Does Montana Tax Tips?
- W-2 Code TP: Tips Reporting Guide
- W-2 Code TT: Overtime Reporting Guide
- All 51 States: Tips & Overtime Tax Map