Mackay Property Tax Quick Facts
- Location
- Mackay, Idaho
- Custer County
- Assessed By
- the Custer County assessor
How to Appeal Property Taxes in Mackay
Check your assessment
Enter your Mackay address for a free 60-second check. We compare your assessed value against comparable sales and neighborhood data.
Get your evidence packet
If over-assessed, pay $45 for a complete appeal packet with comparable sales, equity analysis, and pre-filled forms for Custer County.
File your appeal
Submit your appeal to Custer County. Our filing guide walks you through every step.
About the Mackay Property Market
Mackay is a city located in Custer County, Idaho. Every property inside the Mackay city limits is assessed by the Custer County assessor, which applies Idaho property tax rules uniformly across the county.
Because Mackay property values are set at the county level, the same assessment rules apply to homes throughout the city. Homeowners who believe their Mackay home is over-assessed have the right to file a appeal directly with Custer County.
Idaho allows the assessor to defend or adjust the assessed value during a appeal, so Mackay homeowners should build a strong evidence-based case before filing — which is exactly what ProtestMax generates for $45.
Mackay Property Market Context
As a city in Idaho, Mackay inherits the state's assessment framework — which shapes how over-valuations occur and how homeowners can fight them.
Idaho market character
Idaho has seen some of the fastest home value appreciation in the country — Boise, Coeur d'Alene, and Idaho Falls have all recorded double-digit annual gains. Effective tax rates are moderate (~0.6%), but rapid appreciation means the dollar impact of an over-assessment is large.
How Idaho handles appeals
Idaho homeowners appeal first to the county Board of Equalization, then the State Board of Tax Appeals or District Court. Assessed value cannot be increased as a result of filing an appeal.
When to file in Mackay
Notices mail by the first Monday in June. Appeals must be filed by the fourth Monday in June — roughly a three-week window.
Common Mackay Property Types
Mackay homeowners typically file protests across these property categories:
Single-family homes
The most common residential type and the dominant protest category.
Condominiums
Common in denser parts of the city and near employment centers.
Townhouses
Attached-home neighborhoods in newer subdivisions.
Small multi-family
Duplexes and 2-4 unit buildings assessed as income property.
Commercial
Retail, office, and small commercial along major corridors.
ProtestMax supports all of the above property types in Mackay. Each appealpacket is tailored to the property's classification and uses comparable sales from Mackay and surrounding Custer County neighborhoods.