2027 Idaho Income Tax Brackets & Rates
Idaho taxes a single filer's taxable income at a flat 5.3% above $4,811 for tax year 2027. These figures are provisional, last checked 2026-11-10.
Federal and state tax brackets, capital gains rates, and corporate tax rates for Idaho in tax year 2027.
Federal Income Tax Brackets (2027)
| From | To | Rate |
|---|---|---|
| $0 | $12,800 | 10.00% |
| $12,800 | $52,025 | 12.00% |
| $52,025 | $109,125 | 22.00% |
| $109,125 | $208,325 | 24.00% |
| $208,325 | $264,550 | 32.00% |
| $264,550 | $661,375 | 35.00% |
| $661,375 | No limit | 37.00% |
Idaho State Income Tax Brackets (2027)
| From | To | Rate |
|---|---|---|
| $0 | $4,811 | 0.00% |
| $4,811 | No limit | 5.30% |
Federal Capital Gains Tax Brackets (2027)
| From | To | Rate |
|---|---|---|
| $0 | $51,050 | 0.00% |
| $51,050 | $563,200 | 15.00% |
| $563,200 | No limit | 20.00% |
Additional Information
- Federal Corporate Tax Rate
- 21.00%
- State Corporate Tax Rate
- 5.30%
- Federal Standard Deduction (Single)
- $16,600
Common questions
- Does Idaho have an income tax in 2027?
- Yes. Idaho taxes a single filer's taxable income at a flat 5.3% above $4,811 for tax year 2027.
- What is the top Idaho income tax rate for 2027?
- 5.3%, on a single filer's taxable income above $4,811.
- Are the 2027 Idaho income tax figures final?
- Not yet. They are provisional, last checked 2026-11-10, and will be confirmed against the final published schedule.
Sources & Trust
Every figure above is traceable to a published source. Each source is rated by what published it, not by how confident we feel about it.
Federal (United States) — 2027
OfficialValues verified- Rate bracketsTier 1 · Primary authority
- Standard deductionNot separately cited
- Capital gainsNot separately cited
- Corporate rateNot separately cited
1 source— show— hide
Cited for Rate brackets · confirmed
Primary citation recorded with the tax table entry; coverage beyond the rate brackets is unconfirmed.
How we rate sources — tiers are derived from what published the document, not from our confidence in it.
Idaho — 2027
ProvisionalValues verifiedFlat 5.3% (Idaho Code 63-3024). Standard deduction follows federal, $16,600 single for 2027 (63-3022(j), Rev. Proc. 2026-35). The indexed 2027 zero bracket is not yet published; the threshold shown is an earlier year's. Corporate rate carried from 2026.
- Rate bracketsTier 1 · Primary authority
- Standard deductionNot separately cited
- Capital gainsNot separately cited
- Corporate rateNot separately cited
1 source— show— hide
Cited for Rate brackets · confirmed
Primary citation recorded with the tax table entry; coverage beyond the rate brackets is unconfirmed.
How we rate sources — tiers are derived from what published the document, not from our confidence in it.