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Updated 2025 Tax Year

Madison County
Property Tax Guide

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

9 Official Sources
8 min read
Quick Facts
Tax Rate
0.709% (rural areas) to 0.844% (urban areas), varies by taxing districts
Exemptions
4+ Available
Section 1

How Property Tax Works

Madison County, Idaho operates on a property tax system that funds essential local services including schools, emergency services, infrastructure, and county operations. Property taxes are calculated based on assessed values, which are set at 30.88% of market value using sales data from 2022, 2023, and 2024. The county reassesses properties periodically to maintain equitable valuations across all parcels.

For the 2025 tax year, Madison County has varying tax rates depending on location within the county. Urban areas have a tax rate of 0.844%, while rural areas have a lower rate of 0.709%. However, your actual property tax rate will depend on the specific taxing districts where your property is located, including school districts, fire districts, highway districts, and other special assessment areas. These district-specific levies can cause significant variation in total tax rates even within the same general area of the county.

Property owners should note that various tax credits are available to reduce tax obligations, but these require annual application and are not automatically applied to your tax bill. The most common is the homestead exemption for owner-occupied residences, which must be applied for through the county assessor's office.

Section 2

What Makes Up Your Tax Bill

ComponentRate RangeDescription
County GeneralVariesBasic county operations and services
School DistrictVariesLocal school district operations and bonds
Urban Rate0.844%Total rate for urban areas (2025)
Rural Rate0.709%Total rate for rural areas (2025)
Fire DistrictVariesEmergency services (where applicable)
Highway DistrictVariesLocal road maintenance and improvement
Cemetery DistrictVariesCemetery maintenance (where applicable)
Library DistrictVariesPublic library services (where applicable)

These rates apply to the FY 2025 levy year. Your actual total tax rate depends on which combination of taxing districts serve your specific property location. Properties within city limits typically have higher rates due to additional municipal services, while rural properties may have fewer district assessments but could include rural fire protection or highway district levies.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Madison 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 Madison County are triggered by specific events that change a property's assessed value during the tax year. The most common triggers include ownership transfers, completion of new construction, additions or major improvements to existing structures, and changes in property use classification. When these events occur, the county assessor determines the difference between the old and new assessed values.

The supplemental tax is calculated by applying the current tax rate to the increase in assessed value, prorated for the portion of the tax year remaining after the change occurred. For example, if you complete a $100,000 addition to your home in January, and your area's tax rate is 0.844%, you would owe approximately $844 in supplemental taxes for that improvement, spread across the remaining months of the tax year.

Supplemental tax bills are issued separately from regular property tax bills and have their own due dates, typically 30 days from the date of issuance. Property owners should budget for these additional assessments when making significant improvements or purchasing property mid-year, as they represent immediate additional tax obligations beyond the regular annual property tax bill.

Example Calculation

Example 1: $300,000 Home (Urban Area)

  • Market Value: $300,000
  • Assessed Value (30.88%): $92,640
  • Homestead Credit Applied: -$1,320 (estimated)
  • Net Taxable Value: $91,320
  • Tax Rate: 0.844%
  • Annual Tax: $771
  • Monthly Escrow: $64

Example 2: $600,000 Home (Rural Area)

  • Market Value: $600,000
  • Assessed Value (30.88%): $185,280
  • Homestead Credit Applied: -$1,320 (estimated)
  • Net Taxable Value: $183,960
  • Tax Rate: 0.709%
  • Annual Tax: $1,304
  • Monthly Escrow: $109

Example 3: $1,000,000 Home (Urban Area)

  • Market Value: $1,000,000
  • Assessed Value (30.88%): $308,800
  • Homestead Credit Applied: -$1,320 (estimated)
  • Net Taxable Value: $307,480
  • Tax Rate: 0.844%
  • Annual Tax: $2,595
  • Monthly Escrow: $216

Note: Homestead credit amounts are estimates and require annual application. Actual credits may vary based on current exemption levels and qualification requirements.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Madison County require borrowers to maintain an escrow account for property taxes and insurance. Your lender will collect monthly payments equal to 1/12th of your estimated annual property tax bill, plus a small cushion to account for potential increases. These funds are held in a separate account and paid directly to Madison County when taxes come due.

Property tax payments are typically due in two installments, with the first half due by December 20th and the second half due by the following year's due date. Your mortgage servicer will make these payments on your behalf from your escrow account. If your property taxes increase due to reassessment or rate changes, your lender will adjust your monthly escrow payment accordingly, usually with 60 days' written notice.

It's important to review your annual escrow analysis statement to ensure adequate funds are being collected. If you believe your property has been over-assessed, you can appeal the valuation, but continue making escrow payments as required. Any refund from a successful appeal will be credited to your escrow account or refunded according to federal escrow regulations.

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 Madison County? A: For the current tax year, property taxes can be paid in full by December 20th without penalty, or in two halves with the first half due December 20th and the second half due the following year. Some sources indicate alternative dates of May 12th and November 10th, so contact the Madison County Treasurer's office to confirm current payment schedules.

Q: What is the homestead exemption and how do I apply? A: The homestead exemption is a tax credit available to property owners who occupy their residence as their primary home for 6 or more months of the year. This credit requires annual application through the County Assessor's office and typically caps annual assessment increases rather than reducing the base assessed value. You must apply by April 15th each year.

Q: Are there other tax credits available? A: Yes, Madison County offers various tax credits including exemptions for seniors, disabled persons, veterans, and disabled veterans. Each credit has specific eligibility requirements and application deadlines. Contact the County Assessor's office at (208) 356-3662 for current applications and requirements.

Q: How often are properties reassessed? A: Madison County conducts periodic reassessments to maintain current market values. The current assessment level of 30.88% of market value is based on sales data from 2022, 2023, and 2024. Property values are reviewed annually, with comprehensive reappraisals conducted on a cyclical basis.

Q: How do I appeal my property assessment? A: Property owners who believe their assessment is too high can appeal to the Madison County Board of Equalization. Appeals must typically be filed by the third Monday in June. Contact the County Assessor's office for appeal forms and procedures.

Q: What are the penalties for late payment? A: Late payments incur interest charges and penalties as specified in Idaho Code. Contact the County Treasurer's office for current penalty rates and payment options if you've missed the due dates.

Q: Can I pay my property taxes online? A: Contact Madison County Treasurer's office to inquire about online payment options and accepted payment methods. Many Idaho counties offer online payment systems for property taxes.

Q: Why do property tax rates vary within Madison County? A: Property tax rates vary based on the special taxing districts that serve your property, such as school districts, fire districts, highway districts, and library districts. Urban properties typically have higher rates due to additional city services, while rural properties may have different combinations of district assessments.

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