Idaho Local Income Tax Deduction
Idaho Local Income Tax Deduction 2026
Idaho local income tax planning should identify whether the tax is a state, city, county, school district, or local earned-income tax. Federal Schedule A treatment is a separate SALT question, and ID filing rules determine the actual state/local payment workflow.
Primary taxpayer
Idaho resident or filer evaluating local income tax deduction
Federal check
Review the IRS deduction or income reporting rule first
State check
Idaho return treatment and 5.3% top state rate
Canonical route
/deduction/local-income-tax/idaho/
What matters for 2026
- Use this exact state page when the search intent names both the deduction topic and the state.
- Separate the federal deduction, state return treatment, and local filing records before estimating savings.
- Verify the current-year IRS and state source links before taking a filing position.
Next step
Use the main deduction guide for calculator inputs, eligibility checks, related forms, and broader federal rules.
Open the full guidePlanning workflow
- 1Confirm whether the federal itemized, above-the-line, credit, exclusion, or income-reporting rule applies.
- 2Review Idaho filing instructions separately instead of assuming the federal result carries over.
- 3Keep source documents, worksheets, receipts, and return workpapers together for audit support.
- 4Use the linked LevyIO guide for broader calculator inputs, then return to this page for the state-specific checklist.
Records to keep
- Federal form or worksheet tied to the deduction topic
- Idaho return instructions, schedules, or state workpapers
- Receipts, statements, confirmations, or logs supporting the amount
- A short note showing how federal and state calculations differ
Primary sources
2026 savings example for Idaho
Planning estimate for a single filer earning $65,988 (Idaho median household income in LevyIO's state dataset) who removes $5,000 from taxable income. Federal tax uses the 2026 IRS brackets after the $16,100 standard deduction; ID tax uses the state brackets in LevyIO's dataset and assumes the state follows the federal treatment.
Estimated total savings
$865
Federal savings
$600
$5,739 → $5,139 · 12% bracket
ID state savings
$265
$2,389 → $2,124 · 5.3% marginal
Combined marginal rate
17.3%
≈ $173 saved per $1,000 deducted
Statutory maximum for this item in LevyIO's dataset: $40,400.
Federal × Idaho marginal rates (2026, single)
Gross-income ranges include the federal standard deduction. The ID column is the state marginal rate at the midpoint of each range. The last column is the tax saved per $1,000 deducted at that combined rate.
| Federal bracket | Gross income (single) | ID marginal | Combined | Per $1,000 |
|---|---|---|---|---|
| 10% | $16,100 - $28,500 | 5.3% | 15.3% | $153 |
| 12% | $28,500 - $66,500 | 5.3% | 17.3% | $173 |
| 22% | $66,500 - $121,800 | 5.3% | 27.3% | $273 |
| 24% | $121,800 - $217,875 | 5.3% | 29.3% | $293 |
| 32% | $217,875 - $272,325 | 5.3% | 37.3% | $373 |
| 35% | $272,325 - $656,700 | 5.3% | 40.3% | $403 |
| 37% | Over $656,700 | 5.3% | 42.3% | $423 |
Eligibility & forms
Taxpayers in cities/counties with local income tax
- Part of the combined $40,400 SALT cap ($20,200 MFS)
- Must itemize
- NYC, Philadelphia, etc.
Federal forms: Schedule A
Idaho filing notes
Federal standard deduction automatically applies. Maximize the 60% capital gains exclusion on Idaho-sourced investments. Use the grocery credit. Retirement income is fully taxable.
Common mistakes: Forgetting local tax exists; Not including in SALT calculation.
Frequently asked questions
How much can the Local Income Tax Deduction save a Idaho taxpayer in 2026?
In LevyIO's example, a single filer with $65,988 of income (the Idaho median household income in our state dataset) who removes $5,000 from taxable income saves about $600 in 2026 federal tax (12% marginal bracket) plus about $265 in Idaho tax (5.3% state marginal rate), roughly $865 combined. It is a planning estimate computed from the 2026 IRS brackets and LevyIO's ID bracket data, not a survey figure.
What is the Idaho income tax rate for 2026?
Idaho has a flat 5.3% income tax. The ID standard deduction in LevyIO's dataset is $16,100 single / $32,200 married. Flat 5.3% above $4,811 (single). Uses federal taxable income. 60% Idaho capital gains exclusion. Grocery credit $120/person.
Who qualifies for the Local Income Tax Deduction in Idaho?
Taxpayers in cities/counties with local income tax. The federal rules are the same in every state; the requirements are: Part of the combined $40,400 SALT cap ($20,200 MFS); Must itemize; NYC, Philadelphia, etc.. Idaho filers should confirm on the ID return whether the state follows the federal treatment.
Which forms do I file to claim the Local Income Tax Deduction?
Federal: Schedule A. Idaho: check the Idaho State Tax Commission instructions for the matching state schedule. Common mistakes: Forgetting local tax exists; Not including in SALT calculation.
Local Income Tax Deduction in other states
Sources
Reviewed 2026-09-17. Estimates are educational planning figures computed from the IRS 2026 inflation adjustments and LevyIO's state bracket dataset; they are not tax advice.