Rate Breakdown

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

How Property Tax Works in Bannock County

In Bannock County, property taxes are based on the assessed value assigned by the county assessor’s office. Assessments occur annually, with the county taking the current market value of each property and applying a consistent assessed value ratio (often around 99–100 % of the market value). The assessed value is then multiplied by the total millage rate to calculate the annual tax amount. Millage rates are the sum of county, city, school district, and special district levies expressed in mills—thousandths of a dollar per dollar of assessed value. For example, if a property's assessed value is $150,000 and the combined millage rate is 30 mills (0.030 dollars per dollar), the annual tax bill will be $4,500.

Available Exemptions

• Homestead Exemption – Eligible homeowners can claim a $10,000 reduction on their assessed taxable value (single or joint). Children of county residents under 18 can also receive a small exemption.
• Senior Citizen Exemption – Property owners aged 65 + with a combined annual gross income of $50,000 or less may qualify for a partial homestead exemption or a specific senior tax cut, depending on county banding.
• Disability Exemption – Owners with documented disabilities may receive a full or partial homestead exemption, subject to local criteria and proof of income limits.
• Veteran Exemption – Disabled veterans and surviving spouses of deceased veterans may be granted a full $10,000 homestead exemption plus an additional tax‑documented exemption.

All exemptions require an application form, supporting documentation, and approval by the county assessor before the tax year in which the owner becomes eligible.

Payment Schedule & Deadlines

Bannock County offers two installment options for property taxes:

• First Installment – Due by June 30. Paying this installment on time avoids a 0.25 % interest charge.
• Second Installment – Due by January 15 of the following year. Late payment of the second installment incurs a 0.25 % per month interest plus a $25 flat penalty.

Full payment can be made by July 1 to avoid both interest and penalties. Payments are accepted online, by mail, or in person at the county treasurer’s office. The county offers a streamlined online portal where taxpayers can view their balances, make partial payments, or set up automated deduction.

Appealing Your Assessment

Property owners who believe their assessed value is too high have 15 days from the date of the official assessment notice to file an appeal with the Bannock County Assessor’s Office. The appeal process involves:

• Submit a written appeal with a clear statement of the error and supporting evidence (recent appraisal, comparable sales, or repair costs).
• Attend a hearing – The appeal hearing is scheduled within 30 days of filing. Property owners can present evidence, witness testimony, and a certified appraiser’s report.
• Receive a written decision – The assessor’s office will either reduce the assessment or deny the appeal. Five days after the decision, the owner may file a further appeal with the State Board of Land Commissioners.

Proper documentation—including recent sales of comparable homes in the vicinity—greatly improves the chances of a favorable outcome.