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Updated 2025 Tax Year

Fremont County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.54% effective rate (varies by taxing districts serving your location)
Exemptions
5+ Available
Section 1

How Property Tax Works

Fremont County, Idaho operates on a property tax system that funds essential county services, schools, and various special districts throughout the region. For the 2025 tax year, the effective property tax rate in Fremont County is approximately 0.54%, though this represents a median rate that can vary significantly based on your specific location within the county. Property taxes are the primary funding mechanism for local government services, school districts, highway districts, and other special taxing districts that provide services to residents.

Your actual property tax rate will depend on the combination of taxing districts that serve your specific property location. These may include the county general fund, school districts, highway districts, fire districts, cemetery districts, and other special assessments. Each district sets its own levy rate within state-imposed limits, which means properties in different areas of Fremont County can have substantially different total tax rates even with similar assessed values.

Property tax bills in Fremont County are calculated based on the assessed value of your property, which is determined by the County Assessor's office. Idaho law requires properties to be assessed at market value, with assessment caps and various tax credits available to eligible property owners who apply for them through the proper channels.

Section 2

What Makes Up Your Tax Bill

ComponentApproximate RateDescription
County General0.15% - 0.20%Basic county services, administration, law enforcement
School District0.25% - 0.35%Local school operations and facilities
Highway District0.05% - 0.08%Road maintenance and transportation infrastructure
Fire District0.02% - 0.05%Fire protection and emergency services
Cemetery District0.01% - 0.02%Cemetery maintenance and operations
Other Special Assessments0.02% - 0.10%Various local improvement districts
Total Effective Rate~0.54%Combined rate varies by location

Rates shown are for FY 2025-2026 and represent typical ranges. Your actual rate depends on which specific taxing districts serve your property location. Contact the Fremont County Assessor's office at (208) 624-7332 for your exact district combination and current rates.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Fremont 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 Fremont County are additional property tax assessments that occur outside the regular annual assessment cycle. These are typically triggered by significant changes to your property ownership or value during the tax year. The most common triggers include change of ownership (sale or transfer), completion of new construction, major renovations that add substantial value, or correction of assessment errors discovered mid-year.

When a supplemental assessment is issued, it calculates the difference between what you've already paid based on the previous assessment and what you should pay based on the new, higher assessed value. The supplemental tax covers the period from when the change occurred through the end of the current tax year. For example, if you complete a major home addition in March that increases your home's value by $100,000, you would receive a supplemental tax bill covering March through the following February at the rate applied to that additional $100,000 in assessed value.

Supplemental tax bills are typically mailed within 60-90 days of the triggering event and become due 30 days from the date of mailing. These taxes are in addition to your regular annual property tax bill and cannot be paid through existing escrow arrangements - they must be paid directly by the property owner.

Example Calculation

Example 1: $300,000 Home Value

  • Market Value: $300,000
  • Assessed Value: $300,000
  • Homeowner's Exemption Applied: -$125,000 (requires application)
  • Net Taxable Value: $175,000
  • Annual Tax (0.54% rate): $945
  • Monthly Escrow Payment: $79

Example 2: $600,000 Home Value

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Homeowner's Exemption Applied: -$125,000 (requires application)
  • Net Taxable Value: $475,000
  • Annual Tax (0.54% rate): $2,565
  • Monthly Escrow Payment: $214

Example 3: $1,000,000 Home Value

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Homeowner's Exemption Applied: -$125,000 (requires application)
  • Property Tax Reduction (PTR) Applied: -$1,500 additional credit (requires separate application)
  • Net Taxable Value: $875,000
  • Annual Tax (0.54% rate): $4,725
  • Monthly Escrow Payment: $394

Note: All tax credits require annual application and approval. Homeowner's exemption applications are due by April 15th. Property Tax Reduction applications have separate deadlines.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Fremont County require borrowers to maintain an escrow account for property tax payments, especially when the loan-to-value ratio exceeds 80%. Your lender will collect monthly payments equal to 1/12th of your annual property tax bill, plus a cushion amount typically equal to 2-3 months of payments. The lender holds these funds in a separate escrow account and makes payments directly to Fremont County when taxes become due.

Property taxes in Fremont County are due annually by November 10th, with half of the total amount due by this date. Your lender will typically make the payment a few days before the deadline to ensure timely receipt. You should receive an escrow analysis statement annually from your lender showing the account balance, payments made, and any adjustments needed for the coming year. If your property taxes increase due to rising assessments or new special district levies, your monthly escrow payment will be adjusted accordingly.

It's important to verify that your lender is making timely payments, as you remain ultimately responsible for property tax obligations even when using escrow. You can verify payments through the Fremont County Treasurer's office online portal or by calling (208) 624-7332. If you pay off your mortgage or refinance, ensure that any escrow balance is properly transferred and that you begin making direct payments to avoid late penalties.

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 Fremont County for FY 2025-2026? A: Property taxes are due annually by November 10th. Half of the total amount is due by this date, with the remaining balance due with the tax bill mailed in November.

Q: What tax credits are available and do they require application? A: The primary credits include the Homeowner's Property Tax Exemption (up to $125,000 assessed value reduction) and the Property Tax Reduction Program (up to $1,500 tax credit). Both require annual applications. Veterans with disabilities may qualify for additional credits up to $1,500.

Q: How does the Homeowner's Exemption work and when must I apply? A: The Homeowner's Exemption reduces assessed value by 50% of your home's value or up to $125,000, whichever is less. You must apply by April 15th annually, and the property must be your primary residence for more than six months per year. This is an exemption that reduces assessed value, not a credit that reduces your tax bill.

Q: How often are properties reassessed in Fremont County? A: Idaho law requires annual assessment at market value. The County Assessor's office reviews all properties yearly, with physical inspections conducted on a cyclical basis. You'll receive an assessment notice in the spring if your value changes significantly.

Q: What is the deadline to appeal my property assessment? A: Assessment appeals must be filed with the Fremont County Board of Equalization by the fourth Monday in June following the assessment notice. Contact the Assessor's office at (208) 624-7332 for specific forms and procedures.

Q: What are the penalties for late property tax payments? A: Late payments incur penalties and interest charges. Taxes not paid by the November 10th deadline are subject to penalty fees and interest that compound over time. Contact the Treasurer's office for specific penalty rates.

Q: Can I pay property taxes online in Fremont County? A: Yes, Fremont County offers online payment options through their website. Credit card payments incur a 2.5% processing fee, and e-check payments have a $1.00 processing fee. These payments are processed through a third-party vendor.

Q: How do special taxing districts affect my property tax rate? A: Your property may be located within multiple special districts (fire, highway, cemetery, etc.), each with its own levy rate. The combination of all applicable district rates determines your total effective tax rate, which is why rates vary by location within Fremont County.

Q: What happens if I receive a supplemental tax bill? A: Supplemental taxes are due 30 days from the bill date and cannot be paid through mortgage escrow - you must pay directly. These typically result from property improvements, ownership changes, or assessment corrections.

Q: Are there tax credits available for seniors or low-income residents? A: Idaho's Property Tax Reduction Program provides up to $1,500 in tax relief for qualifying homeowners. Applications are due by April 15th, and eligibility is based on income and other factors. Contact the Assessor's office for specific qualification requirements.

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