Written by: Derik Edwards, Managing Director, Property Tax
What Indiana’s 2026 Assessment Means for Property Owners
The 2026 assessment cycle in Indiana is likely to have a material impact on commercial property values and tax bills. With the entire state undergoing a cost schedule update, we anticipate value increases across the board, making it especially important for property owners to understand what is changing and how it may affect their assessed values. While values in Indiana are trended annually, what happens this year can still have meaningful implications, particularly if an assessment sets a higher baseline for future trending. Just as importantly, doing nothing can carry real risk. If an owner does not file an appeal by June 15, 2026, they lose the opportunity to contest the value until the following year.
What Indiana Property Owners Need to Know for 2026
Indiana assesses property values annually through trending, though counties are still required to physically inspect every parcel at least once every four years. While trending occurs each year, assessment years can have an outsized impact because they often establish a new baseline for future valuations. The key timing trigger for appeals is the Form 11 assessment notice, since its issue date determines the filing deadline. If the Form 11 is issued before May 1, property owners must file an appeal by June 15 of the assessment year. For example, a Form 11 dated April 30, 2026 would carry a June 15, 2026 appeal deadline for the 2026 pay 2027 tax year. If no Form 11 is issued, the tax bill itself serves as the assessment notice for purposes of determining appeal timing.
Key Reassessment Facts
| VALUATION (LIEN) DATE | January 1, 2026 |
| TAX YEARS IMPACTED | 2026pay2027 |
| JURISDICTIONS AFFECTED | Statewide |
| ASSESSMENT NOTICES EXPECTED | Mailed April 30, 2026 |
| APPEAL DEADLINES | June 15, 2026 |
Where Property Owners Are Most at Risk of Overassessment in 2026
Property owners are most at risk of overassessment in 2026 when assessed values do not reflect market conditions as of the valuation date, especially given continued weakness in the office market. At the same time, rising cost drivers, interest rates, and vacancy trends can widen the gap between real performance and cost-driven assessments, particularly as cost model updates push values higher across property types.
Additionally, owners should watch for common modeling issues that can compound increases, such as updating cost schedules while removing prior adjustments. In Indiana, assessments generally start with the cost approach, though some property types, like multifamily, require assessors to consider cost, income, and sales approaches and apply the lowest indicated value.
What This Means for Your Bottom Line
- Multi-year impact: Appealing now can lower the base value used for future annual trending.
- Short formal appeal deadline: Indiana does not offer informal appeals, and the formal deadline is just 45 days after values are issued.
- Valuation trending up: Cost table updates are driving value increases across all property types.
- Strict deadlines: If you miss the formal appeal deadline, there is no opportunity to reduce the value.
Why Early Preparation Matters Before Indiana Value Notices are Issued
Indiana’s appeal window moves quickly, making early preparation critical. Having the right information ready allows owners to act immediately when values are released and when counties are most open to discussion.
Property owners should begin reviewing operating performance and market conditions now, including financial trends, vacancy outlook, and near-term capital needs or deferred maintenance, such as roof or HVAC issues. Early preparation supports faster, more cost-effective resolution through negotiation and reduces the risk, expense, and uncertainty of later stages in the appeal process.
DMA delivers the greatest impact early, during the negotiation period after an appeal is filed and before hearings begin. Our long-standing relationships with county assessors help position each appeal for a more favorable outcome.
Proof: DMA Delivers Results for Indiana Property Owners
Indianapolis – Office Building
- Assessment Reduction: 43%
- Annual Savings: $337,389
Indianapolis – Office Building
- Assessment Reduction: 43%
- Annual Savings: $190,381
Why Indiana Owners Choose DMA
Indiana property owners choose DMA for our deep understanding of local jurisdictions and how assessors apply valuation rules in practice. Our appeal strategies are tailored to each property and each county, backed by experienced valuation professionals who know where assessments tend to overreach. Just as important, we focus on resolving appeals as early as possible, with a strong track record of success through negotiation rather than costly, time consuming formal hearings.
Get a Risk-Free Assessment Review
We’ll compare your projected or actual assessment to market evidence and tell you whether an appeal makes sense.
Connect with DMA’s Indiana property tax experts to review your portfolio, identify overassessment risk, and uncover potential savings.