HonestCasa logoHonestCasa
Updated 2025 Tax Year

Valley County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.8% to 1.2% of market value (varies by special taxing districts)
1st Due
Dec 20
2nd Due
Jun 20
Exemptions
4+ Available
Section 1

How Property Tax Works

Valley County, Idaho operates under the state's property tax system to fund essential local services including schools, fire protection, law enforcement, road maintenance, and county operations. Property taxes in Valley County are calculated based on the assessed value of your property multiplied by the applicable tax rate, which varies by location within the county due to different combinations of special taxing districts.

The effective property tax rate in Valley County typically ranges from approximately 0.8% to 1.2% of market value, depending on your specific location and the special districts that serve your property. These districts may include school districts, fire districts, cemetery districts, and other local service areas. Idaho does not impose a statewide assessment cap, meaning property values can increase without limitation based on market conditions, though certain tax credits may help limit the impact of assessment increases for qualifying homeowners.

Section 2

What Makes Up Your Tax Bill

The 2025 property tax rates for Valley County are not yet finalized, as rates are typically set closer to the tax year. Based on available data and historical patterns, here is the general structure:

ComponentEstimated Rate RangeDescription
County General0.15% - 0.25%County services, administration, roads
School District0.40% - 0.60%Local school operations and facilities
Fire District0.05% - 0.15%Fire protection and emergency services
Cemetery District0.01% - 0.03%Cemetery maintenance and operations
Other Special Districts0.05% - 0.20%Various local services (varies by location)
Total Estimated Range0.66% - 1.23%Combined rate varies by property location

Note: These are estimated ranges for planning purposes. Official rates for fiscal year 2025-2026 will be available from the Valley County Treasurer's office closer to the tax year. Your actual rate depends on which special taxing districts serve your specific property location.

Section 3

When Are Property Taxes Due?

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

First Installment
Dec 20
Delinquent after Dec 10
Second Installment
Jun 20
Delinquent after Apr 10
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 Valley County are additional property tax bills issued when there are changes to property ownership, new construction, or significant improvements made to existing properties during the tax year. These taxes are calculated based on the difference between the old and new assessed values, prorated for the portion of the tax year remaining after the change occurred.

For example, if you complete a home addition worth $50,000 in March, and your property tax rate is 1.0%, you would receive a supplemental tax bill for approximately $375 ($50,000 × 1.0% × 9/12 months remaining in the tax year). Supplemental taxes are typically billed separately from your regular property tax bill and have their own due dates, usually 30 days from the date of issuance.

Example Calculation

Below are three property tax calculations for Valley County using an estimated effective rate of 1.0% (actual rates vary by location and special districts):

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value: $300,000
  • Less: Homeowner's Exemption (if applied): -$125,000
  • Net Taxable Value: $175,000
  • Annual Tax (1.0%): $1,750
  • Monthly (if escrowed): $146

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Less: Homeowner's Exemption (if applied): -$125,000
  • Net Taxable Value: $475,000
  • Annual Tax (1.0%): $4,750
  • Monthly (if escrowed): $396

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Less: Homeowner's Exemption (if applied): -$125,000
  • Net Taxable Value: $875,000
  • Annual Tax (1.0%): $8,750
  • Monthly (if escrowed): $729

Note: The Homeowner's Exemption requires annual application and applies only to your primary residence and up to one acre of land. All tax credits require application and are not automatically applied.

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 Valley County require property tax escrow accounts for borrowers with less than 20% down payment, though some borrowers may choose escrow for convenience. Your lender collects 1/12 of your estimated annual property tax bill with each monthly mortgage payment, depositing these funds into an escrow account.

Valley County property taxes are typically paid in two installments: the first half due by December 20th and the second half due by June 20th of the following year. Your lender will pay these bills directly from your escrow account when they become due. Lenders are required to provide an annual escrow analysis showing the account activity and any required adjustments to your monthly payment based on actual tax bills and account balance requirements. You should review your property tax bills even when using escrow to ensure accuracy and to stay informed about your property's assessed value and any available tax credits.

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 Valley County? A: Property taxes for fiscal year 2025-2026 are due in two installments: December 20, 2025 (first half) and June 20, 2026 (second half). Personal property tax declarations for businesses are due March 15th.

Q: What is the Homeowner's Exemption and how do I apply? A: The Homeowner's Exemption is a tax credit that reduces the taxable value of your primary residence and up to one acre of land by up to $125,000. This credit requires annual application through the Valley County Assessor's office and is not automatic. Applications and details are available on the county assessor's website.

Q: Does Idaho have a homestead credit that limits assessment increases? A: Idaho does not have a statewide homestead credit that caps annual assessment increases like some other states. However, the Homeowner's Exemption provides significant tax relief by reducing your taxable assessed value. You must apply for this exemption annually.

Q: When are properties reassessed in Valley County? A: Idaho law requires annual assessment of all properties. Assessment notices are typically mailed in the spring, with values reflecting market conditions as of January 1st of the assessment year.

Q: How do I appeal my property assessment? A: You can appeal your assessment by filing an appeal with the Valley County Board of Equalization. Appeals must be filed by the fourth Monday in June following the assessment notice. Contact the Valley County Assessor's office for specific appeal procedures and forms.

Q: What are the penalties for late property tax payments? A: Late payments are subject to penalties and interest charges. Contact the Valley County Treasurer's office for current penalty rates and payment options to avoid additional fees.

Q: Can I pay my property taxes online? A: Yes, Valley County typically offers online payment options through the County Treasurer's website. Check the official Valley County website for current online payment portals and accepted payment methods.

Q: Why did my tax bill increase even though the tax rate didn't change? A: Tax bills can increase due to rising property values, new special district assessments, or the expiration of tax credits. Special taxing districts within Valley County may also approve additional levies for specific projects or services, which would increase your total tax rate.

Q: What other tax credits or exemptions are available in Valley County? A: Valley County may offer additional exemptions for seniors, disabled veterans, disabled persons, and certain agricultural or timber properties. All exemptions and credits require application through the appropriate county office. Contact the Valley County Assessor for a complete list of available programs and application requirements.

Q: How do special districts affect my property taxes? A: Your property tax rate depends on which special taxing districts serve your location, such as school districts, fire districts, and cemetery districts. Properties in different areas of Valley County may have different combinations of these districts, resulting in varying total tax rates even for properties with similar assessed values.

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