Key Takeaways
- Installation services can qualify for Ohio’s manufacturing exemption when the underlying equipment qualifies. Whether the installation itself is exempt depends on how the transaction is structured, whether it functions as a construction contract, and how the labor is billed — not on a single bright-line rule.
- The primary use test governs equipment eligibility. If the equipment being installed is used more than 50% in a qualifying manufacturing operation, the installation labor tied to that equipment may also be exempt.
- Separating an equipment purchase from its installation contract can affect exemption eligibility, but there’s no blanket rule that a different vendor automatically makes the labor taxable. The outcome depends on how the labor is classified, whether the arrangement functions as a construction contract, and how the service is billed.
- Documentation requirements are specific. Incomplete records linking installation services to qualifying equipment make the exemption substantially harder to support during an audit.
- Manufacturers who have paid sales tax on installation services that should have qualified can file Form ST AR within four years of payment to recover those amounts.
Ohio’s manufacturing sales tax exemption covers more than most manufacturers realize, including, in certain circumstances, the installation services that put qualifying equipment into production.
The operative word is “certain.” Installation labor does not automatically inherit the exemption status of the equipment it supports. The structure of the transaction, the use of the equipment, and the documentation behind the purchase all determine whether the exemption applies. Manufacturers who assume installation is exempt because the equipment is exempt frequently discover the error during an audit, when the cost to correct it includes penalties and interest on top of the tax itself.
The Tax Commissioner’s guidance and ORC 5739.011 establish the framework. What follows is how that framework applies to the installation scenarios Ohio manufacturers encounter most often.
1. Equipment Eligibility Comes First
In Ohio, there is no separate statutory “installation exemption.” Rather, installation services may qualify for exempt treatment when they are part of the sale and installation of equipment that independently qualifies for Ohio’s manufacturing exemption under ORC 5739.011.
The primary use determination must be made and documented before the installation occurs. If the equipment fails the test, the installation services tied to that equipment are taxable regardless of how the transaction is structured.
Manufacturers evaluating new equipment purchases should classify the asset’s anticipated use before negotiating the purchase agreement. That classification drives both the equipment exemption and the installation exemption that follows from it. For a closer look at how the primary use test plays out across a manufacturing operation, see our guide on the manufacturing sales tax exemption.
2. Transaction Structure Can Affect Taxability
Ohio treats installation differently depending on what kind of transaction it actually is: part of an equipment sale, a construction contract, a repair job, or plain taxable labor. There’s no single statute saying that hiring a different vendor for installation automatically makes the labor taxable.
What actually determines taxability comes down to a handful of facts: whether the installation labor counts as a taxable service on its own, whether the job functions as a construction contract, whether real property gets involved, and how the installation is billed relative to the equipment.
Using two vendors does not automatically destroy the exemption, but it does raise the stakes of the evaluation. When equipment and installation come from different vendors, each contract tends to get reviewed on its own, so the installation’s exempt status can’t simply ride on the equipment’s.
Manufacturers planning capital equipment purchases should have separate installation contracts reviewed before assuming the labor qualifies for exempt treatment. A single-vendor, turnkey structure remains the simplest way to keep installation tied to the equipment’s exemption, but it is not the only path to a defensible result.
3. Does the Installation Become Part of Real Property?
Some installation projects raise a different question: does attaching the equipment turn it into real property? Ohio taxes construction contracts differently than equipment sales, and permanently affixed equipment may cause the transaction to be analyzed under Ohio’s construction contract rules rather than solely under the manufacturing exemption.
A press bolted to a plant floor for stability is not the same, tax-wise, as a system wired permanently into a building’s electrical and structural systems. When installation crosses into a real property improvement, the job may fall under Ohio’s construction contract rules, which tax the contractor’s materials differently than they’d tax the installer’s labor under the equipment’s own exemption.
Manufacturers should flag any installation involving foundations, structural modification, or permanent building integration for a separate contractor-tax review rather than assume the equipment exemption carries straight through. Our session on sales tax for contractors walks through where that line falls for contractors working alongside manufacturing clients.
4. Documentation Requirements Are Specific
Equipment alone isn’t enough to survive an audit. Ohio requires documentation that links the installation services to the qualifying equipment and supports the tax treatment claimed for the transaction.
The necessary records include:
- A valid Ohio exemption certificate (Form STEC B for recurring purchases or Form STEC U for one-time purchases) provided to the vendor at the time of purchase
- An invoice or purchase agreement that identifies both the equipment and the installation services within a single transaction
- Internal records establishing the primary use classification of the equipment before installation
- Documentation of the equipment’s placement in the manufacturing process and its role in transforming materials for sale
Exemption certificates that state only “manufacturing use” without describing the actual purchase create audit exposure. Ohio does not require the certificate to cite ORC 5739.011 by number, but it should accurately describe the basis for the exemption and correspond to the specific transaction being claimed.
Manufacturers who have historically provided only equipment-focused exemption certificates should review whether installation services were inadvertently excluded from the exemption scope.
5. Repair and Maintenance Installation Follows Its Own Rules
Installation services performed as part of new equipment acquisition follow the analysis described above. Repair, maintenance, and replacement installation follow a separate set of rules entirely.
Ohio permits the manufacturing exemption to apply to repair parts and replacement components for equipment that qualifies under the primary use test. Whether the installation labor tied to that repair is taxable comes down to the facts and structure of that specific job, particularly how the vendor bills for parts versus labor.
There is no single rule that repair parts are always exempt while repair labor is always taxable. Some repair labor on qualifying manufacturing equipment can itself be treated as exempt, particularly when it is inseparable from the sale of exempt parts within one transaction.
Manufacturers with ongoing maintenance contracts should have their contract structure reviewed rather than assume a specific outcome. The right classification depends on the equipment, the nature of the work, and how the vendor bills for parts and labor.
6. Recovery of Overpaid Tax Is Available Within the Lookback Window
Manufacturers who have paid Ohio sales tax on installation services that should have qualified for the exemption can file Form ST AR to recover those amounts. The filing window is four years from the date of payment.
The recovery process requires the same documentation that would have supported the exemption at the time of purchase. Manufacturers pursuing refund claims should be prepared to demonstrate that the equipment met the primary use test, that the claimed exemption requirements were satisfied, and that the transaction structure complied with Ohio’s requirements.
For manufacturers who have never reviewed their installation service purchases against the exemption criteria, the four-year lookback represents a recovery opportunity that diminishes with each passing month. The analysis is worth conducting before the oldest eligible payments age out of the recovery window.
The Line Between Exempt and Taxable Is Narrower Than It Appears
Ohio’s manufacturing exemption for installation services is not a blanket provision. It applies when the equipment qualifies, when the transaction is structured correctly, and when the documentation exists to support the claim. Manufacturers who assume they qualify without checking each piece are carrying audit risk they don’t need to.
Rea’s SALT services team, including Principal Joseph Popp, works with Ohio manufacturers to evaluate exemption eligibility, structure purchases correctly, and recover overpaid tax where the lookback window remains open. If your team has not reviewed installation service purchases against the exemption criteria, that review is worth doing before the next capital equipment decision or the next audit notice, whichever arrives first.
Contact Rea’s manufacturing and distribution team to discuss what a structured exemption review could mean for your operation.
About the Author
Sharon Uecker is a Sr. Manager on Rea’s State and Local Tax (SALT) team, specializing in sales and use tax compliance, multi-state tax issues, nexus and taxability analysis, voluntary disclosures, and audit defense. She brings over 14 years of sales and use tax advisory experience serving clients across manufacturing, retail, hospitality, financial services, and healthcare.
