Idaho State Income Tax Overview
Idaho (ID) state income tax rate: 5.8% (graduated rate system)
Idaho Income Tax Brackets (2026)
5.695% on income up to $90,600 (joint) / $45,300 (single); 6.925% on income above those thresholds — wait, Idaho simplified to a flat-like 5.8% in 2023 on income over $2,500 (single)/$5,000 (joint)
Idaho reduced and simplified its income tax in 2022–2023 to a near-flat structure. The top rate of 5.8% applies to income above very low thresholds, making Idaho effectively a flat-rate state for most filers. A flat 5.695% was enacted for 2024.
Median Household Income in Idaho
The median household income in Idaho is $60,999. Idaho's median income is near the national average, with significant growth in Boise and surrounding areas driven by tech migration from California. Housing costs have risen sharply, putting pressure on lower- and middle-income residents.
How to Use This Calculator for Idaho
- Enter your gross income and filing status
- The calculator applies Idaho's graduated income tax rate of up to 5.8%
- Subtract your standard deduction and any applicable credits
- Review your estimated state and federal tax liability
Frequently Asked Questions
What is the Idaho state income tax rate?
Idaho has a graduated income tax with a top rate of 5.8%. 5.695% on income up to $90,600 (joint) / $45,300 (single); 6.925% on income above those thresholds — wait, Idaho simplified to a flat-like 5.8% in 2023 on income over $2,500 (single)/$5,000 (joint).
How does Idaho's income tax compare to the national average?
Idaho's top income tax rate of 5.8% applies to a graduated rate system. Idaho reduced and simplified its income tax in 2022–2023 to a near-flat structure. The top rate of 5.8% applies to income above very low thresholds, making Idaho effectively a flat-rate state for most filers. A flat 5.695% was enacted for 2024.
What is the median household income in Idaho?
The median household income in Idaho is $60,999. Idaho's median income is near the national average, with significant growth in Boise and surrounding areas driven by tech migration from California. Housing costs have risen sharply, putting pressure on lower- and middle-income residents.
Is this state income tax calculator free to use for Idaho?
Yes, this state income tax calculator is 100% free with no signup required. It includes Idaho-specific tax rates and calculates your estimated state and federal tax liability instantly.