Indiana Manufacturing Exemption: When Utilities and Environmental Controls Qualify

Indiana's manufacturing exemption can create meaningful sales and use tax savings, especially for facilities with significant electricity, gas, water, steam, equipment, and environmental-control costs. But the exemption is not automatic just because a business is a manufacturer.

The real question is how the item or utility is used. Indiana looks for a direct connection to direct production. That makes environmental controls, HVAC, refrigeration, compressed air, process utilities, and mixed-use meters especially important review areas. Some costs may be exempt because production cannot occur without them. Others may remain taxable because they support storage, employee comfort, general building operations, or post-production handling.

This is a classic Indiana manufacturing issue: the opportunity can be real, but the documentation has to be strong.

The Direct Production Framework

Indiana law provides exemptions for certain machinery, tools, equipment, materials, and utilities used in direct production. For manufacturing equipment, Indiana Code Section 6-2.5-5-3 exempts qualifying manufacturing machinery, tools, and equipment when acquired for direct use in direct production, manufacture, fabrication, assembly, processing, refining, finishing, or similar production activity.

Indiana Department of Revenue guidance describes this as a fact-specific test. Property is directly used in direct production when it has an immediate effect on the article being produced. That immediate effect exists when the property is an essential and integral part of an integrated production process.

That language matters. It is not enough for an item to be helpful to a manufacturer. It needs to be tied to the actual production process, not merely to the facility or business as a whole.

Sources reviewed:

• Indiana Sales Tax Information Bulletin #55
• Indiana Sales Tax Information Bulletin #13
• Indiana Code Section 6-2.5-5-3
• Indiana Code Section 6-2.5-5-5.1

Utilities Used in Manufacturing

Indiana Sales Tax Information Bulletin #55 addresses utilities used in manufacturing, production, recycling, floriculture, and arboriculture. The bulletin explains that utilities may be sold exempt when directly consumed in the direct production of other tangible personal property in the customer's manufacturing or production business.

For manufacturers, the practical test is whether the utility is consumed as an essential and integral part of an integrated process that produces tangible personal property. Electricity used to power production machinery is the easy example. But many refund opportunities and audit disputes arise around less obvious utility uses:

• Air handling systems
• Clean rooms
• Process cooling
• Refrigeration
• Freezers
• Boilers
• Ovens and fryers
• Humidity controls
• General lighting
• General space heating and cooling

Indiana's guidance draws a line between utilities that make production possible and utilities that merely support the workplace.

HVAC Is Not One Thing for Indiana Sales Tax

The most interesting part of the Indiana analysis is environmental control.

Bulletin #55 states that utility service used to operate equipment that controls the environment so production can occur is exempt, excluding the ambient temperature required for employees. That distinction is powerful.

For example, the bulletin describes a computer-chip manufacturer using specially designed air-handling equipment to control temperature, humidity, and air particulate levels in a clean room. Because production cannot occur unless those conditions are carefully controlled, the utility services consumed by that equipment are treated as nontaxable.

Contrast that with general facility HVAC. Bulletin #55 also gives an example where adhesives used in attaching material to a truck must be applied within a temperature range. Even though the facility is maintained within that range, the costs to heat and air condition the entire facility at 72 degrees are not exempt. The system is serving the general building environment, not functioning as production equipment with a direct and essential role in the integrated process.

That is the hinge point: does the environmental-control system create or maintain a production condition without which the product cannot be made, or does it simply maintain a comfortable or generally suitable workplace?

Refrigeration, Freezers, and Preservation

Refrigeration is another area where labels can mislead.

Indiana guidance distinguishes between equipment and utilities used in actual production and equipment used for storage or preservation. Bulletin #55 gives food-related examples that are useful beyond the restaurant context. Utility services used for a freezer used only in making ice cream or a fryer used for cooking may be exempt because the utility is consumed in production. By contrast, utilities consumed for a refrigerator or heat lamp used to keep products or raw materials in the same condition are taxable.

The manufacturing takeaway is not that freezers are always exempt or refrigerators are always taxable. The takeaway is that Indiana cares about function. Is the equipment changing the product or enabling a production step, or is it preserving inventory before or after production?

Manufacturers should be careful with broad categories like "process cooling" or "refrigeration." A chiller that controls a production reaction or stabilizes material during manufacturing may belong in a different tax category than refrigeration used to store finished goods.

The Meter-by-Meter Problem

Indiana's utility exemption can turn on how consumption is measured.

Bulletin #55 states that the 100% exemption applies only if nontaxable utilities are separately metered and predominately used by the purchaser for exempt uses. Predominately used means more than 50% of the utilities measured by that meter are consumed for exempt uses. Each meter is considered separately. Multiple meters are not aggregated together to reach the threshold.

That creates a practical planning issue. If a meter serves both production and nonproduction loads, the taxpayer needs a defensible study or measurement approach. If a meter is predominately used in exempt production, the taxpayer may pursue full exemption treatment for that meter. If it does not meet the predominant-use threshold, Indiana may still allow partial exemption treatment for utilities directly consumed in direct production, but the process is different.

Forms and Refund Mechanics

For utility purchases, Indiana's exemption process is document-driven.

To receive an exemption from a utility provider, the taxpayer must complete Form ST-200, the Utility Sales Tax Exemption Application. If the Indiana Department of Revenue approves the application, it issues a validated Indiana Utility Exemption Certificate, Form ST-109, which is forwarded to the utility company. Bulletin #55 states that Form ST-109 is the only exemption form a utility can accept to exempt the utility from collecting Indiana sales tax.

For partial exemptions, or for periods where tax was already paid, the taxpayer generally pays the tax first and then files a refund claim with documentation. Bulletin #55 references Form GA-110L for refund claims within the normal statute of limitations.

In practice, this means the technical tax analysis and the documentation package need to work together. A taxpayer may have a strong production use, but without meter support, engineering detail, utility studies, invoices, and the right forms, the position can be difficult to sustain.

Common Manufacturing Review Areas

Manufacturers should consider reviewing:

• Utility meters serving production equipment, clean rooms, process cooling, boilers, ovens, or compressed air systems.
• HVAC systems serving controlled production environments rather than general employee comfort.
• Refrigeration and freezer systems used to transform or produce goods rather than preserve inventory.
• Equipment used before the first production step or after the product is complete, which may fall outside the integrated production process.
• Mixed-use systems that support both production and nonproduction activities.
• Prior utility tax payments where no exemption certificate was in place.
• Capital projects where contractors, engineers, and AP teams used inconsistent tax coding.

These reviews often reveal both risk and opportunity. Some purchases may have been incorrectly treated as exempt because the item was located in a manufacturing facility. Other purchases may have been taxed by default even though the utility or equipment was essential to direct production.

Documentation That Helps Defend the Position

A strong Indiana manufacturing exemption file should explain the production process in operational terms, not just tax terms. Useful documentation includes:

• A process flow showing when production begins and ends.
• Equipment lists identifying which assets have an immediate effect on the product.
• Utility studies by meter, including exempt and taxable loads.
• Engineering support for environmental controls, clean rooms, humidity, particulate, or temperature requirements.
• Vendor invoices, purchase orders, contracts, and exemption certificates.
• Form ST-200 applications, ST-109 certificates, and correspondence with utilities.
• Refund workpapers tying tax paid to exempt utility consumption or qualifying equipment.
• Internal taxability matrices used by purchasing and accounts payable teams.

The goal is to show why the item or utility is essential and integral to the integrated production process. A conclusory statement that "this is used in manufacturing" is usually not enough.

Practical Takeaways for Indiana Manufacturers

Indiana's manufacturing exemption is valuable, but it rewards precision. Environmental control systems may qualify when they create production conditions that are essential to making the product. General HVAC for employee comfort generally does not. Freezers and process cooling may qualify when they participate in production. Refrigeration used to preserve raw materials or finished goods may remain taxable.

The best next step is to walk the plant floor and map taxability to the actual production process. Start with high-dollar utility meters, environmental-control systems, and mixed-use assets. Then compare the operational facts to Indiana's direct production standard and the utility exemption process.

For many manufacturers, the review can produce three useful outcomes: reduced future tax, refund opportunities for prior overpayments, and a cleaner audit defense file.

How Brown & Associates Can Help

Brown & Associates helps manufacturers identify sales and use tax overpayments, evaluate exemption positions, and build documentation that can withstand audit scrutiny. Indiana utility and environmental-control issues are especially well suited for a focused review because the tax result often depends on meter data, engineering facts, and how the production process actually works.

If your Indiana facility has significant utility, HVAC, refrigeration, clean room, or production equipment costs, a targeted review can help determine whether your current tax treatment is supportable and whether refund opportunities exist.