Income Taxes in Idaho
Idaho's income tax is genuinely real and current -- a flat 5.3% rate as of 2025-2026, the endpoint of five consecutive years of cuts -- with real, specific rules on capital gains, Social Security, and retirement-account income that this record discloses precisely rather than assuming blanket low-tax treatment.
Exploring the idea of moving?
We can connect you with a local real estate professional who knows the area -- no pressure, just a starting point.
Learn moreA real, current flat rate, and the trajectory that produced it
Idaho's flat individual income tax rate is 5.3%, effective tax year 2025 onward via House Bill 40 (signed by Governor Brad Little on March 6, 2025, retroactive to January 1, 2025, described by the Governor's office as the largest income tax cut in Idaho history). This is the product of five consecutive years of cuts: 6.5% (2021) down through 6.0%/5.8% (2022), 5.8% (2023), and 5.695% (2024) to the current 5.3%. This record discloses a real, minor cross-source inconsistency in exactly how the 2022 cut was sequenced, not fully reconciled against a single primary source, though every source agrees on the current 5.3% rate.
Capital gains are taxed as ordinary income, with a real, disclosed deduction for qualifying Idaho property
Idaho has no separate capital gains rate or excise tax (unlike Washington's statewide capital gains excise tax) -- gains are taxed as ordinary income at the same flat 5.3% rate. A real, disclosed 60% deduction applies to qualifying Idaho-based property or business capital gains held 12 months or longer, a meaningful, genuine reduction worth confirming directly with a tax professional for a specific transaction.
Social Security is fully exempt; retirement-account withdrawals are fully taxable
Idaho fully exempts Social Security benefits from state income tax with no income limit -- a real, meaningful benefit given the state's substantial retiree in-migration, particularly in North Idaho. Pensions, IRA withdrawals, and 401(k) distributions remain fully taxable at the flat 5.3% rate, though a new federal-OBBBA-conformity senior deduction of up to $6,000 applies for filers 65 and older, subject to income-based phase-outs. See the retiring topic for the fuller picture.
Key takeaways
- Idaho's flat individual income tax rate is 5.3% (2025-2026), the endpoint of five consecutive years of cuts from 6.5% in 2021 via House Bill 40, signed March 2025.
- Idaho taxes capital gains as ordinary income at the same flat rate, but offers a real 60% deduction for qualifying Idaho-based property/business gains held 12+ months.
- Social Security is fully exempt from Idaho income tax with no income limit; pensions, IRAs, and 401(k) withdrawals remain fully taxable, though a new $6,000 senior deduction (65+) applies subject to phase-outs.
Want to know what your budget actually buys here?
Tell us a bit about what you're looking for and we'll connect you with someone local who can walk you through real numbers.
Get local guidanceRead the full Idaho overview for the complete picture, or explore individual cities and towns we've researched.
Planning a move?
Tell us what you're looking for and we'll connect you with a local expert who can help you make it happen.
Talk to a local expert