Mortgage Interest Deduction in Idaho
State income tax rate
5.3%
Itemized deductions allowed
✅ Yes
State-Level Mortgage Interest Deduction
Idaho has a top rate of 5.3% and conforms to federal itemized deductions, allowing mortgage interest deduction on state returns.
Combined Federal + Idaho Savings
If you paid $18,000 in mortgage interest last year and itemize on both returns, your combined tax savings would be approximately:
- Federal (22% bracket): $3,960
- Idaho (5.3% rate): $954
- Total estimated savings: $4,914
These are estimates based on a 22% federal bracket. Your actual savings depend on your specific tax situation.
Frequently Asked Questions
Keep reading
CalculatorMortgage Interest Deduction CalculatorRun your own numbers with Idaho rates applied.GuideMortgage Interest Deduction by StateHow the federal rules interact with each state's conformity and limits.GuideIs a Home Equity Loan Tax Deductible?The 2018 rules, and the use test that decides whether your interest qualifies.GuideMortgage Points: What They Cost and When They Pay OffPoints are prepaid interest, and on a purchase they can be deducted in the year paid.
Rate reflects the top marginal state income tax rate for 2026 per the Tax Foundation. Whether a deduction helps depends on your full return, including whether itemizing beats the federal standard deduction. General information, not tax advice.