Indianapolis Commercial and Industrial Property Assessments Rising Sharply for 2025, Producing Higher Tax Bills in 2026

At a Glance

• Taxpayers must file appeals of 2025 assessments no later than June 15, 2026.
• If left unchallenged, the increase in assessed value will have a material impact on property tax liabilities, possibly for years to come.

Preliminary data released by the Marion County Assessor’s Office shows that commercial and industrial properties located across Indianapolis and the county are projected to receive substantial increases in assessed value for the 2025 assessment year, leading to higher tax bills next year.

A survey of more than 12,000 parcels by our team has revealed an average increase of 27% and a median increase of 18%. These results mirror statewide trends resulting from Indiana’s elimination of a key cost adjustment, which dramatically increased base construction costs used in the state’s mass appraisal cost tables.

If left unchallenged, the increase in assessed value will have a material impact on property tax liabilities, possibly for years to come. We anticipate additional upwards adjustments by the state to base costs in 2026, causing further assessment increases and higher tax bills in the future.

Key Deadline: Taxpayers must file appeals of 2025 assessments no later than June 15, 2026.

Affected taxpayers may want to consult with a property tax attorney to evaluate potential appeal opportunities and strategies to reduce their property tax burden.

Helpful Links

• Click here to research your 2025 assessment using a parcel number, owner name or address.
• Want to read more about the property tax increases observed across the state of Indiana for 2025? Read our prior article here.

For More Information

For further information, you may contact the authors.