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Updated 2025 Tax Year

Jerome County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.374% effective rate (varies by taxing district location)
Exemptions
5+ Available
Section 1

How Property Tax Works

Jerome County, Idaho operates under the state's property tax system, which funds essential local services including schools, fire protection, emergency services, road maintenance, and county operations. Property taxes in Jerome County are assessed annually based on market value as of January 1st, with the county assessor determining assessed values and various taxing districts setting their levy rates.

The effective property tax rate in Jerome County is approximately 0.374% for the 2025-26 levy year, though actual rates vary significantly by location within the county depending on which special taxing districts serve your property. These districts may include school districts, highway districts, fire districts, cemetery districts, and other local improvement districts. Idaho's property tax system allows for a homeowner's exemption that can reduce assessed value by up to $125,000 for qualifying primary residences, but this benefit requires a separate application and is not automatically applied.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
Base County Levy~0.374%Core county services for FY 2025-2026
School District LevyVariesLocal school district operations and bonds
Highway DistrictVariesRoad maintenance and improvements
Fire DistrictVariesFire protection and emergency services
Cemetery DistrictVariesCemetery maintenance (if applicable)
Special AssessmentsVariesLocal improvement districts, if any

Note: The total effective rate varies by property location within Jerome County. Urban properties may have different special district combinations than rural properties. The 2025-26 levy year rates shown reflect current assessments, with a 3% growth factor applied consistently across the county.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Jerome 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 property taxes in Jerome County are triggered by significant changes to property ownership or improvements that occur after the January 1st assessment date. Common triggers include new construction completion, major renovations that add square footage or significantly upgrade a property, or when new improvements are discovered during reassessment.

When supplemental taxes are assessed, they are calculated based on the difference between the old assessed value and the new assessed value, multiplied by the applicable tax rate for the remaining months in the tax year. For example, if a $50,000 addition is completed and assessed in March, the supplemental tax would be calculated on that $50,000 increase for the remaining 9 months of the tax year, resulting in approximately 75% of the annual tax on that improvement value.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Less Homeowner's Exemption: -$125,000 (requires application)
  • Net Taxable Value: $175,000
  • Annual Tax (0.374%): $655
  • Monthly Escrow: ~$55

Example 2: $600,000 Home

  • Market Value: $600,000
  • Less Homeowner's Exemption: -$125,000 (requires application)
  • Net Taxable Value: $475,000
  • Annual Tax (0.374%): $1,777
  • Monthly Escrow: ~$148

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Less Homeowner's Exemption: -$125,000 (requires application)
  • Net Taxable Value: $875,000
  • Annual Tax (0.374%): $3,273
  • Monthly Escrow: ~$273

Note: These calculations use the base county rate and assume homeowner's exemption application has been filed and approved. Actual taxes will vary based on special district rates in your specific location.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Jerome County require property tax escrow accounts, collecting monthly payments along with your mortgage payment to ensure taxes are paid on time. Lenders typically collect 1/12th of your annual property tax bill each month, plus a small cushion as allowed by federal law. Your lender will pay your property taxes directly to Jerome County when they become due in September.

Each year, your lender must provide an escrow analysis showing the previous year's tax payments and projecting the coming year's requirements. If your property taxes increase due to rising assessments or new special district levies, your monthly escrow payment will be adjusted accordingly. You have the right to request documentation of tax payments and escrow calculations from your lender at any time.

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 Jerome County property taxes due for the current fiscal year? A: Property taxes are due in September each year. The first half payment is typically due in September, with the second half due the following September.

Q: What homeowner tax credits are available and do I need to apply? A: Idaho offers a Homeowner's Property Tax Exemption (not a credit) that reduces assessed value by up to $125,000 or 50% of assessed value, whichever is less. This requires a separate application filed with the Jerome County Assessor and is NOT automatic.

Q: How does the homestead exemption work? A: The homeowner's exemption reduces your property's assessed value for tax calculation purposes. It does not cap assessment growth but provides a flat reduction in taxable value. All deeded owners must occupy the home as their primary residence to qualify for the full exemption.

Q: When does the county assess property values? A: Jerome County assesses all properties annually as of January 1st. Assessment notices are typically mailed in the spring, with appeal deadlines usually falling in June or July.

Q: What are the penalties for late property tax payments? A: Idaho law imposes penalties and interest on late property tax payments. Contact Jerome County directly for current penalty rates and payment options.

Q: Can I pay my property taxes online? A: Check with Jerome County's website or contact the county treasurer's office for current online payment options and accepted payment methods.

Q: Why do my taxes differ from my neighbor's even though our homes are similar? A: Tax amounts vary based on assessed value, exemptions applied, and most importantly, which special taxing districts serve each property. Different school districts, fire districts, or other special assessments can create significant differences.

Q: How do I appeal my property assessment? A: Property assessment appeals must be filed with the Jerome County Board of Equalization by the deadline specified on your assessment notice, typically in June or July. Contact the county assessor's office for current appeal procedures and deadlines.

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