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Annual Adjustments

Annual Adjustments or “trending” of property values became part of Indiana’s move to a market-based assessment system that began in 2002.

Trending requires assessors to research sales of properties in a particular area every year. Using that information, assessors then estimate the values of other properties in the same area to determine an assessed value.

Please see our Fact Sheet for more information on Annual Adjustments.

Ratio Study Approval Information

As part of the Annual Adjustment process, counties are responsible for submitting a ratio study and uniformity for all classes of property in all townships. The ratio study measures the accuracy and equity of assessments. It is determined by the formula: Assessed Value/Sale Price = Ratio. The assessment ratio for all properties in Indiana is to be 100%.

The accuracy of assessments refers to how close the assessments determined by local assessing officials are to market value-in-use.

See County Specific Information for your county’s Ratio Study.

Real Property Guidelines

The 2021 rule and manual apply to the reassessment process used by Indiana assessors. By statute, the Department of Local Government Finance adopted this new rule change on December 2, 2020. It became effective on January 1, 2021.

2021 Real Property Rule

2021 Real Property Assessment Guidelines


For Historical Purposes Only

For More Information

For more information on the assessed values of property in Indiana, contact your local assessor. A complete listing of assessor contact information can be found online at