Idaho vs Montana: Take-Home Pay Compared
At a $100,000 salary, a single filer keeps about $158 more per year in Montana after federal tax, state tax, and FICA (estimate).
Idaho applies a flat 5.3% state income tax, while Montana's state income tax is progressive, topping out at 5.65%.
Covers federal income tax, state income tax, and FICA. Like the rest of the site, it excludes local/city income taxes and tax credits — see the methodology.
Heads up: Idaho hastax details this state-level estimate doesn’t fully model — such as local income tax, credits, or deductions — so the real difference can differ.
You keep about $158 more per year in Montana (estimate)
Idaho
You keep 75% of your gross pay
Federal income taxAnnual: −$13,170.00
- Gross income
- $100,000
- Federal standard deduction
- −$16,100
- Federal taxable income
- $83,900
| Bracket | Rate | Tax |
|---|---|---|
| $0–$12,400 | 10.0% | $1,240 |
| $12,400–$50,400 | 12.0% | $4,560 |
| $50,400–$105,700 | 22.0% | $7,370 |
| Total | $13,170 | |
Source:IRS Revenue Procedure 2025-32 (drop PDF) — Section 4.01 Tax Rate Tables and Section 3.14 Standard Deduction, tax year 2026fetched June 17, 2026
State income taxAnnual: −$4,446.70
- Gross income
- $100,000
- State standard deduction
- −$16,100
- Idaho taxable income
- $83,900
$83,900 × 5.3% = $4,447
Source:Idaho State Tax Commission — Individual Income Tax Rate Schedulefetched June 17, 2026
Social SecurityAnnual: −$6,200.00
- Wages subject to Social Security
- $100,000
$100,000 × 6.2% = $6,200
Source:SSA Office of the Chief Actuary — Contribution and Benefit Basefetched June 17, 2026
MedicareAnnual: −$1,450.00
- Wages subject to Medicare
- $100,000
$100,000 × 1.45% = $1,450Medicare has no wage cap.
Source:IRS Topic No. 751 — Social Security and Medicare withholding ratesfetched June 17, 2026
Montana
Estimate
Montana's Department of Revenue has not yet posted the 2026 income-tax rate schedule. This estimate uses the latest available figures; the 2026 schedule is expected to be the same rates.
You keep 75% of your gross pay
Federal income taxAnnual: −$13,170.00
- Gross income
- $100,000
- Federal standard deduction
- −$16,100
- Federal taxable income
- $83,900
| Bracket | Rate | Tax |
|---|---|---|
| $0–$12,400 | 10.0% | $1,240 |
| $12,400–$50,400 | 12.0% | $4,560 |
| $50,400–$105,700 | 22.0% | $7,370 |
| Total | $13,170 | |
Source:IRS Revenue Procedure 2025-32 (drop PDF) — Section 4.01 Tax Rate Tables and Section 3.14 Standard Deduction, tax year 2026fetched June 17, 2026
State income taxAnnual: −$4,289.10
- Gross income
- $100,000
- State standard deduction
- −$16,100
- Montana taxable income
- $83,900
| Bracket | Rate | Tax |
|---|---|---|
| $0–$47,500 | 4.7% | $2,233 |
| $47,500+ | 5.65% | $2,057 |
| Total | $4,289 | |
Source:Montana Department of Revenue — HB 337 income tax changes (2026–2027)fetched June 17, 2026(estimate)
Social SecurityAnnual: −$6,200.00
- Wages subject to Social Security
- $100,000
$100,000 × 6.2% = $6,200
Source:SSA Office of the Chief Actuary — Contribution and Benefit Basefetched June 17, 2026
MedicareAnnual: −$1,450.00
- Wages subject to Medicare
- $100,000
$100,000 × 1.45% = $1,450Medicare has no wage cap.
Source:IRS Topic No. 751 — Social Security and Medicare withholding ratesfetched June 17, 2026
Idaho source
Updated June 17, 2026Source: Idaho State Tax Commission — Individual Income Tax Rate Schedule
Montana source
Updated June 17, 2026Source: Montana Department of Revenue — HB 337 (2026 rates: 4.7% / 5.65%)
Estimate
Montana's Department of Revenue has not yet posted the 2026 income-tax rate schedule. This estimate uses the latest available figures; the 2026 schedule is expected to be the same rates.
Idaho vs Montana: take-home by salary
Single filer, 2026 rates, annual take-home before any pre-tax deductions.
| Salary | Idaho | Montana | Difference |
|---|---|---|---|
| $75,000 | $58,471 | $58,716 | −$245 |
| $100,000 | $74,733 | $74,891 | −$158 |
| $150,000 | $106,694 | $106,677 | $17 |
A positive difference means Idaho take-home is higher at that salary. At least one state's figures are approximate — estimate-basis data or taxes not fully modeled here; see the notes above.
Estimate only — not tax advice. This calculator gives an approximate take-home figure based on 2026 federal income tax, Social Security and Medicare (FICA), and, where shown, state income tax. It does not account for tax credits (such as the Child Tax Credit or EITC), the Alternative Minimum Tax, preferential capital-gains rates, or itemized deductions beyond the standard deduction. Your actual paycheck may differ. Consult a qualified tax professional for advice specific to your situation.