Idaho vs Oregon Income Tax — 2026
A single filer earning $100,000 pays $3,467 less per year in Idaho than in Oregon — $289 a month. Idaho charges $4,447; Oregon charges $7,913.
Why this pair has a page: bordering states.
The bill at every income
Single filer, standard deduction, no dependents. State income tax only.
| Gross income | Idaho tax | Oregon tax | Difference |
|---|---|---|---|
| $50,000 | $1,797 | $3,538 | $1,742 less in ID |
| $75,000 | $3,122 | $5,726 | $2,604 less in ID |
| $100,000 | $4,447 | $7,913 | $3,467 less in ID |
| $150,000 | $7,097 | $12,542 | $5,446 less in ID |
| $250,000 | $12,397 | $22,442 | $10,046 less in ID |
| $500,000 | $25,647 | $47,192 | $21,546 less in ID |
| $1,000,000 | $52,147 | $96,692 | $44,546 less in ID |
How the two systems differ
| Idaho | Oregon | |
|---|---|---|
| Tax structure | Flat rate | Graduated |
| Top marginal rate | 5.3% | 9.9% |
| Number of brackets | 1 | 4 |
| Standard deduction (single) | $16,100 | $2,910 |
| Personal exemption | None | $263 credit |
| Local income taxes | No | Yes |
| Capital gains | preferential | ordinary |
| Population (2024) | 2,001,619 | 4,272,371 |
By filing status
| Filing status | Idaho | Oregon | Difference |
|---|---|---|---|
| Single | $4,447 | $7,913 | $3,467 less in ID |
| Married filing jointly | $3,593 | $7,340 | $3,746 less in ID |
| Married filing separately | $4,447 | $7,913 | $3,467 less in ID |
| Head of household | $4,020 | $7,442 | $3,422 less in ID |
Change the assumptions
Adjust income and filing status, or swap either state. The URL updates so you can share the exact comparison.
At $100,000 as a single filer, Idaho costs $3,467 less per year than Oregon — $289 a month.
| Idaho | Oregon | Difference | |
|---|---|---|---|
| State income tax | $4,447 | $7,913 | $3,467 |
| Per month | $371 | $659 | $289 |
| Effective rate | 4.45% | 7.91% | 3.47 pts |
| Marginal rate | 5.3% | 8.75% | 3.45 pts |
| Standard deduction | $16,100 | $2,910 | $13,190 |
| Taxable income | $83,900 | $97,090 | $13,190 |
| Tax structure | Flat rate | Graduated | |
| Local income taxes | No | Yes |
Local taxes are not included above. Oregon has localities that levy their own income tax on top of the state figure. See each state page for the rates that apply.
Full detail: Idaho · Oregon · methodology
Local income taxes change this picture
What this comparison leaves out
Sources for both states
- 1.Idaho State Tax CommissionState revenue departmentTable for Percentage Computation Method of Withholding (EPB00744, 07-23-2026)Retrieved · Annual payroll period: single/head of household, "5.3% of the amount over $16,100"; married, "5.3% of the amount over $32,200" - i.e. the 5.3% rate applied above the 2026 federal standard deduction.
- 2.Oregon Department of RevenueState revenue departmentOregon Withholding Tax Formulas, 2026 (150-206-436, Rev. 12-31-25)Retrieved · 2026 bracket edges, $2,910/$5,820 standard deductions, $8,750 federal tax subtraction cap and $263 exemption credit.
- 3.Tax FoundationResearch organisation (cross-check)State Individual Income Tax Rates and Brackets, 2026Retrieved
Figures on this page were last checked against these sources on . Found something wrong? Report it.