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Updated 2025 Tax Year

Twin Falls County
Property Tax Guide

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

7 Official Sources
8 min read
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Quick Facts
Tax Rate
1.059% effective rate (varies by taxing district location)
Exemptions
4+ Available
Section 1

How Property Tax Works

Twin Falls County operates under Idaho's property tax system, which funds essential local services including schools, law enforcement, fire protection, roads, and county operations. Property taxes are calculated based on assessed values determined by the Twin Falls County Assessor's Office, which evaluates properties annually at market value as of January 1st each year.

The effective property tax rate in Twin Falls County for the current levy year is approximately 1.059%, though actual rates vary significantly by location within the county due to overlapping special taxing districts. These districts can include school districts, highway districts, fire districts, cemetery districts, and other local improvement districts. Property owners should expect their specific tax rate to differ based on their exact location and the combination of taxing districts that serve their property.

Property tax bills are mailed each November with payments due December 20th. Property owners have the option to pay the full amount by December 20th or pay half by December 20th with the remaining balance due by June 20th of the following year.

Section 2

What Makes Up Your Tax Bill

ComponentRate RangeDescription
County General~0.200%County operations, sheriff, courts, roads
School Districts~0.400-0.600%Local school district operations and bonds
Highway Districts~0.050-0.150%Road maintenance and improvements
Fire Districts~0.100-0.200%Fire protection and emergency services
Other Special Districts~0.050-0.200%Cemetery, recreation, library, ambulance districts
Total Effective Rate~1.059%Combined rate (varies by location)

Rates shown are approximate for FY 2024-2025 levy year. Actual rates vary by specific taxing districts serving each property location. Contact the Twin Falls County Assessor at (208) 736-4045 for your exact tax rate breakdown.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Twin Falls 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 are additional property tax bills issued when there are changes to property ownership, completion of new construction, or significant improvements that increase a property's assessed value mid-tax year. In Twin Falls County, supplemental taxes are calculated from the date of the triggering event through the end of the current tax year.

For example, if you purchase a home in March that was previously assessed at $250,000 but sells for $400,000, the county may issue a supplemental tax bill for the difference in tax liability from March through June 30th (end of the tax year). The supplemental tax would be calculated on the increased assessed value of $150,000 multiplied by your area's tax rate, prorated for the remaining months in the tax year.

New construction supplemental taxes are common when building permits are finaled. If you complete a $100,000 home addition in September, you would receive a supplemental bill for taxes on that additional value from September through June 30th of the following year.

Example Calculation

Example 1: $300,000 Home

  • Market/Assessed Value: $300,000
  • Homeowner's Exemption Applied: $125,000 (requires application)
  • Net Taxable Value: $175,000
  • Tax Rate: 1.059%
  • Annual Tax: $1,853
  • Monthly Escrow: $154

Example 2: $600,000 Home

  • Market/Assessed Value: $600,000
  • Homeowner's Exemption Applied: $125,000 (requires application)
  • Net Taxable Value: $475,000
  • Tax Rate: 1.059%
  • Annual Tax: $5,030
  • Monthly Escrow: $419

Example 3: $1,000,000 Home

  • Market/Assessed Value: $1,000,000
  • Homeowner's Exemption Applied: $125,000 (requires application)
  • Net Taxable Value: $875,000
  • Tax Rate: 1.059%
  • Annual Tax: $9,266
  • Monthly Escrow: $772

Note: The homeowner's exemption is not automatic and requires annual application with the Twin Falls County Assessor's Office. Additional exemptions may be available for seniors, veterans, or disabled persons.

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Section 5

Escrow & Property Taxes

Most mortgage lenders require property tax escrow accounts for homeowners with less than 20% equity. Your lender collects 1/12 of your estimated annual property tax bill with each monthly mortgage payment, depositing these funds into an escrow account. The lender then pays your property taxes directly to Twin Falls County when bills are due in December and June.

Lenders typically conduct annual escrow analyses to ensure adequate funds are collected. If property taxes increase due to rising assessments or new special district levies, your monthly escrow payment may increase. Conversely, if you successfully appeal your assessment or qualify for new exemptions, your escrow payment may decrease.

Property owners should verify that their lender pays taxes on time, as you remain ultimately responsible for timely payment. You can check payment status through the Twin Falls County Treasurer's online portal or by calling (208) 736-4177. If paying taxes directly without escrow, remember that partial payments are accepted - pay half by December 20th and the balance by June 20th to avoid penalties.

How HonestCasa Helps
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Section 6

Frequently Asked Questions

Q: When are property taxes due in Twin Falls County for the current tax year? A: Property tax bills are mailed in November with the first payment due December 20th. You can pay the full amount by December 20th or pay half by December 20th and the remaining balance by June 20th of the following year.

Q: What tax credits are available and do they require application? A: The primary credit is the homeowner's exemption, which exempts 50% of your home's value up to $125,000 maximum, but it requires annual application with the Assessor's Office. Additional credits may be available for seniors (over 65), veterans with disabilities, and persons with disabilities - all requiring separate applications with specific deadlines.

Q: How does the homestead exemption work? A: Idaho's homeowner's exemption reduces your property's taxable assessed value by up to $125,000 (50% of value or $125,000, whichever is less). This is not automatic - you must file an application with the Twin Falls County Assessor's Office by April 15th following the year you become eligible.

Q: How often are properties reassessed in Twin Falls County? A: Properties are assessed annually as of January 1st. The Twin Falls County Assessor reviews market sales data, construction permits, and property improvements to determine current market values. Assessment notices are typically mailed in April.

Q: What are the penalties for late property tax payments? A: If the first half isn't paid by December 20th, a penalty is added. If the second half isn't paid by June 20th, additional penalties accrue. Properties can eventually be subject to tax deed proceedings for continued non-payment.

Q: Can I pay my property taxes online? A: Yes, Twin Falls County offers online payment options through their website. You can pay by electronic check or credit card, though credit card payments may include processing fees. Contact the Treasurer's Office at (208) 736-4177 for current online payment options.

Q: How do special district taxes affect my bill? A: Your property may be served by multiple taxing districts (school, fire, highway, cemetery, etc.), each with separate levy rates. Your total tax rate is the sum of all applicable district rates. The specific combination depends on your property's location within the county.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Twin Falls County Board of Equalization by the fourth Monday in June. You'll need comparable sales data or other evidence showing your assessment exceeds market value. Contact the Assessor's Office at (208) 736-4045 for appeal procedures and deadlines.

Verified Sources

Backed by 7 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
Tax Doc
2025 average property tax ratestax.idaho.gov
02
Public Notices | Idaho Press Association - Columnidaho.column.us
03
State
Homeowner's Exemption - Idaho State Tax Commissiontax.idaho.gov
04
State
Understanding Property Taxes | Idaho State Tax Commissiontax.idaho.gov
05
State
Property Tax Reduction - Idaho State Tax Commissiontax.idaho.gov
06
Twin Falls FSA - Quarterly - Farm Service Agencyfsa.usda.gov
07
County
Comprehensive Land Use Plan - Camas County, Idahocamascounty.id.gov
All sources verified as of 2025 Tax Year

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