HonestCasa logoHonestCasa
Updated 2025 Tax Year

Idaho County
Property Tax Guide

Everything you need to know about property taxes in Idaho County, ID. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.650% average (varies by taxing district and location within county)
Exemptions
5+ Available
Section 1

How Property Tax Works

Idaho County operates under Idaho's property tax system, which funds essential local services including schools, roads, emergency services, and county operations. Property taxes in Idaho County are calculated based on assessed value multiplied by the applicable tax rate, with the 2025 average property tax rate at 0.650%. However, your actual tax rate may vary significantly depending on your specific location within the county, as different areas are served by various special taxing districts such as school districts, fire districts, cemetery districts, and other local improvement districts.

The property tax system in Idaho County follows the state's assessment practices, with properties assessed annually at market value. Property owners may be eligible for various tax credits that can reduce their tax liability, though most require annual application and have specific eligibility requirements. The county treasurer mails tax bills each November, with a split payment system allowing taxpayers to pay half by December 20th and the remainder by June 20th of the following year.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County General Fund0.200%Basic county services, administration, law enforcement
School District Levy0.280%Local school district operations (varies by district)
Highway District0.085%Road maintenance and construction
Fire District0.045%Fire protection services (varies by district)
Cemetery District0.015%Cemetery maintenance (where applicable)
Special Assessments0.025%Local improvement districts (varies by location)
Total Average0.650%FY 2025-2026 levy year

Note: Actual rates vary by location within Idaho County based on which special taxing districts serve your property. Rural properties may have different fire district rates, and some areas may have additional special district assessments not reflected in this average.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Idaho County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Idaho County are triggered by changes in property ownership, new construction, or improvements that increase a property's assessed value during the tax year. When these events occur after the annual assessment date but before the end of the fiscal year, a supplemental tax bill is issued to account for the change in taxable value. The supplemental tax is calculated by applying the current tax rate to the difference between the old and new assessed values, prorated for the remaining months in the tax year.

For example, if you purchase a home in March that was previously assessed at $250,000 but now has a market value of $350,000, you would receive a supplemental tax bill for the $100,000 increase in assessed value, multiplied by the applicable tax rate (0.650%), and prorated for the remaining 9.5 months of the tax year. This would result in a supplemental tax of approximately $513 ($100,000 × 0.650% × 9.5/12 months).

Example Calculation

Example 1: $300,000 Home

  • Market/Assessed Value: $300,000
  • Homeowner's Exemption Applied: -$125,000 (requires application)
  • Net Taxable Value: $175,000
  • Annual Tax: $175,000 × 0.650% = $1,138
  • Monthly Escrow: $95

Example 2: $600,000 Home

  • Market/Assessed Value: $600,000
  • Homeowner's Exemption Applied: -$125,000 (requires application)
  • Net Taxable Value: $475,000
  • Annual Tax: $475,000 × 0.650% = $3,088
  • Monthly Escrow: $257

Example 3: $1,000,000 Home

  • Market/Assessed Value: $1,000,000
  • Homeowner's Exemption Applied: -$125,000 (requires application)
  • Net Taxable Value: $875,000
  • Annual Tax: $875,000 × 0.650% = $5,688
  • Monthly Escrow: $474

Note: The Homeowner's Exemption is the lesser of 50% of assessed value or $125,000 and requires annual application. All deeded owners must live in the home as their primary residence for more than six months of the year.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Idaho County require property tax escrow accounts for borrowers with less than 20% down payment. Your lender collects 1/12th of your estimated annual property tax bill each month along with your mortgage payment. The lender then pays your property taxes directly to Idaho County when they become due in December and June. Lenders typically conduct an annual escrow analysis to ensure adequate funds are collected, which may result in escrow payment adjustments.

If you have an escrow account, your lender will receive the tax bill directly and handle payment timing. However, you should still review your annual tax bill for accuracy and verify that your lender has received it. For properties without escrow accounts, you're responsible for making payments directly to the Idaho County Treasurer by December 20th for the first half and June 20th for the second half. Late payments incur 1% interest per month and can eventually lead to tax deed proceedings.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due in Idaho County for FY 2025-2026? A: First half taxes are due December 20th, second half taxes are due June 20th. After December 20th, taxes become delinquent and accrue 1% interest per month.

Q: What is the Homeowner's Property Tax Exemption and how do I apply? A: This is actually a tax credit that reduces your assessed value by the lesser of 50% of assessed value or $125,000 for owner-occupied primary residences. You must apply annually with the County Assessor, and all deeded owners must live in the home for more than six months per year.

Q: Are there other tax credits available that require application? A: Yes, Idaho offers various tax credits including disabled veteran exemptions, senior citizen exemptions, and agricultural exemptions. Each requires a separate application with specific eligibility criteria and annual renewal.

Q: How often are properties reassessed in Idaho County? A: Properties are assessed annually at market value as of January 1st. Assessment notices are typically mailed in April, and you have 30 days to appeal to the Board of Equalization if you disagree with the assessment.

Q: Can I pay my property taxes online? A: Yes, Idaho County accepts online payments through their website. You can pay by electronic check or credit card, though credit card payments may incur processing fees.

Q: What happens if I pay my taxes late? A: Late payments incur 1% interest per month. If taxes remain unpaid for three years, the property may be subject to tax deed proceedings where the county can sell the property to recover unpaid taxes.

Q: Why did my tax rate change from last year? A: Tax rates can change due to voter-approved bond measures, special district budget changes, or boundary modifications. Your specific rate depends on which taxing districts serve your property location.

Q: How do special taxing districts affect my property tax bill? A: Special districts like school districts, fire districts, and highway districts each levy their own taxes. Your total rate is the sum of all districts serving your property, which is why rates vary by location within Idaho County.

Q: When is the application deadline for the Homeowner's Exemption? A: Applications must be filed annually with the County Assessor's office. Contact the Idaho County Assessor for specific deadline dates and application forms, as missing the deadline means losing the exemption for that tax year.

Q: What documentation do I need for the Homeowner's Exemption application? A: You'll typically need proof of ownership, proof of primary residency (such as voter registration or driver's license), and the completed application form. All deeded owners must sign the application and meet residency requirements.

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Free • No credit check • 2-minute estimate