Rate Breakdown

Property taxes in Franklin County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Franklin County

In Franklin County, Idaho, property tax is calculated by first determining the assessed value of your real estate. The County Assessor’s Office reviews market data, recent sales, and property condition to assign a fair market value. That assessed value is then multiplied by the county’s millage rate, which is expressed in terms of thousandths of a dollar (mills). Each year the millage rate is set by the Franklin County Board of Commissioners and can vary for different property categories, such as residential, commercial, or agricultural land.

For example, if the assessed value of a single-family home is $200,000 and the residential millage rate is 30 mills, the property tax calculation would be $200,000 × 0.03 = $6,000. The county also allows for annual adjustments that reflect changes in school, municipal, and other district budgets. Your tax bill will reflect all applicable millage rates, including those set by neighboring cities or special districts that share jurisdiction with Franklin County.

Available Exemptions

Frontier property owners can reduce their taxable amount through several state‑wide exemptions. The Department of Revenue’s Exemption Program in Idaho provides relief for homeowners who meet specific eligibility criteria. The most common are:

• Homestead Exemption – A blanket exemption that reduces the taxable value of a primary residence by a fixed amount ($8,000 in many years, but check the current calendar).
• Senior Citizen Exemption – Homeowners 65 or older who meet income thresholds can receive a larger deduction, often between $14,000 and $50,000 depending on income and property type.
• Disability Exemption – Persons with qualifying disabilities may qualify for a significant deduction, sometimes up to $75,000, if they can demonstrate functional impairment and medical documentation.
• Veteran Exemption – Veterans and surviving spouses receive a tax break that may reduce the assessed value by up to $25,000. Service‑connected conditions or a record of honorable discharge are typical requirements.

To apply for any exemption, submit the required form and supporting documentation to the Franklin County Assessor within the deadline set for each fiscal year. Exemptions are applied before the millage rate calculation, meaning the tax payable is directly reduced by the exemption amount.

Payment Schedule & Deadlines

Franklin County issues two payment deadlines each year, reflecting the common practice of paying property taxes in installments. The typical schedule is:

• First Installment – Due May 31. No interest is charged on this portion if paid by the due date.
• Second Installment – Due August 31. Late payment beyond this date incurs a 2% interest penalty plus a late fee of $25.

Property owners may request a payment plan if they are experiencing financial hardship. The county allows an extension of up to 60 days for the second payment with a modest interest rate. However, unapproved late payments trigger a 12% annual penalty calculated on the outstanding balance, and failure to pay after 120 days may result in a levy of the property. Always check the exact dates for the current year in the county’s tax calendar or via the official Franklin County revenue website.

Appealing Your Assessment

If you believe your property has been over‑assessed, you can petition the Franklin County Tax Board of Review within 30 days of the assessment notice. The process involves three main steps:

• File a Request – Submit a written appeal form along with documentation (comparative sales data, recent property appraisals, or evidence of property damage). A filing fee of $25 applies.
• Hearing – A judge will review your appeal and may request additional evidence. You can represent yourself or hire a realtor, appraiser, or attorney.
• Decision – The board will adjust the assessed value if it finds merit. The change takes effect in the following fiscal year. Appeals may be revised, and you can re‑file if the initial decision is unsatisfactory.

Prompt appeals and thorough documentation increase the likelihood of a favorable outcome. For detailed guidance, consult the Franklin County Assessor’s Office or the Idaho Department of Revenue’s online resources.