Indiana's property tax system has undergone significant changes in recent years, and 2026 brings more adjustments that directly affect commercial property owners. From updated trending factors to shifts in how assessors value income-producing properties, understanding these changes is critical to ensuring you are not overpaying. Whether you own property in Marion County or Lake County, this guide covers what you need to know.
How Indiana's Assessment System Works
Indiana uses a market value-in-use standard for property tax assessments. This means your property is assessed based on what it is worth in its current use — not its highest and best use, and not a hypothetical future use. For most commercial properties, this means the assessment should reflect the property's value as a going concern, based on its income-producing capacity, physical condition, and location.
Assessors in Indiana use cost tables developed by the Department of Local Government Finance (DLGF), adjusted by trending factors that are supposed to bring those cost estimates in line with current market values. The problem is that these trending factors are applied broadly — often at the county or township level — and do not account for property-specific conditions that affect value. Our commercial property tax assessment guide explains these valuation methods in more detail.
2026 Trending Factor Updates
Each year, Indiana's DLGF publishes new trending factors (also called "land order values" and "cost factor adjustments") that assessors apply to base cost estimates. For 2026, many counties are seeing increased trending factors driven by rising construction costs and land values in certain markets.
However, these increases do not affect all property types equally. Industrial properties in some areas of Northwest Indiana and the Indianapolis metro region are seeing the largest increases, while retail properties in smaller markets may see more modest adjustments. The disconnect between broad-based trending factors and property-specific market conditions creates opportunities for appeals — particularly when a property's actual market value has not kept pace with the trending-driven assessment increase.
Reassessment Cycles and Their Impact
Indiana conducts general reassessments on a regular cycle, with annual adjustments (trending) in between. The most recent general reassessment used a base year that may not reflect current market conditions in 2026. Properties that were assessed during a period of rising values but have since experienced declines in income, occupancy, or desirability may be significantly over-assessed.
This is particularly relevant for retail properties that have experienced tenant turnover or reduced foot traffic, office properties affected by remote work trends, and hospitality properties with seasonal or cyclical income fluctuations. If your property's income has declined but your assessment has not, you may be overpaying.
The Indiana Appeal Process
Indiana's appeal process starts with an informal review at the county assessor's office. If that does not resolve the issue, you can file a formal appeal with the Property Tax Assessment Board of Appeals (PTABOA). From there, you can escalate to the Indiana Board of Tax Review (IBTR), and ultimately to the Indiana Tax Court.
Each level has its own deadlines and evidentiary requirements. The initial filing deadline for a Form 130 (Notice of Review of Assessment) is typically 45 days after the date of the assessment notice, or June 15th — whichever is later. For a comprehensive overview of deadlines, see our property tax deadlines resource.
Evidence That Wins Indiana Appeals
In Indiana, the property owner bears the burden of proof. This means you must present evidence that your assessment does not accurately reflect your property's market value-in-use. The most effective evidence includes:
- Income and expense data — actual financial statements showing the property's net operating income
- Comparable sales — recent transactions of similar properties in your market area
- Independent appraisals — a certified appraisal from a licensed commercial appraiser
- Property condition documentation — evidence of deferred maintenance, functional obsolescence, or economic obsolescence
- Cap rate analysis — demonstrating that the capitalization rate used by the assessor is inappropriate for your property type
For a deeper dive into building your evidence package, review our property tax appeal evidence guide.
Tax Caps and Circuit Breakers
Indiana's constitutional tax caps limit property tax bills as a percentage of a property's assessed value: 1% for homesteads, 2% for other residential and agricultural property, and 3% for commercial and industrial property. While these caps provide some protection, they also mean that an inflated assessment directly increases the maximum amount you can be taxed. Even with the 3% cap, a property assessed at $5 million pays up to $150,000 per year — but if the true value is $3.5 million, the cap should limit taxes to $105,000.
This is why reducing your assessment is just as important in Indiana as it is in states without tax caps. The cap does not protect you if your assessment is wrong — it just limits the damage.
Industries Most Affected in 2026
Several commercial property sectors in Indiana are particularly susceptible to over-assessment in 2026. The self-storage industry has seen rapid development, leading to increased competition and softening rents in some markets — but assessments may not have caught up. Restaurant properties continue to face elevated operating costs that reduce NOI but may not be reflected in assessments. And healthcare facilities face unique valuation challenges related to specialized construction and limited buyer pools.
Take Action Before Deadlines Pass
Indiana's appeal deadlines are firm. If your 2026 assessment seems too high, the time to act is now. Start by requesting a free assessment review from EPTA. We will analyze your property's assessment, compare it to market data, and tell you whether an appeal is worth pursuing. If it is, we handle the entire process on contingency — there is no fee unless we reduce your taxes.
With nearly 20 years of experience across Indiana, Michigan, and Ohio, our team understands the nuances of Indiana's assessment system and knows how to build cases that produce results. Learn more about the cost of a property tax appeal and what success rates look like.
