A manufacturing sales and use tax exemption lets a business buy raw materials, production machinery, and certain supplies without paying sales tax, because those items either become part of a product sold to a customer or are used directly to make it. The exemption exists to prevent the same value from being taxed at every stage of production. Claiming it correctly means understanding which purchases qualify, providing vendors with proper exemption certificates, and self-assessing use tax on anything that doesn’t.
What Qualifies as Manufacturing
The exemption applies to businesses engaged in industrial production, meaning the transformation of raw materials into a new and different product intended for sale. Mixing chemicals into a cleaning solution, machining metal into engine parts, and combining ingredients into packaged food all qualify. Simple repairs, cleaning, and repackaging generally do not, because nothing new comes out of the process.
States also apply a direct use test to individual purchases. Equipment and supplies have to be integral to the actual production steps, not just convenient. A press that stamps sheet metal into brackets clears this test easily. A forklift moving pallets between the loading dock and a finished-goods warehouse sits in a gray area that depends on the state. The closer an item comes to physically touching or transforming the product, the stronger the exemption claim.
What You Can Buy Tax-Free
Raw Materials and Components
Materials that physically become part of the finished product are the most straightforward exempt category. Steel in a car frame, fabric in upholstered furniture, and flour in commercial bread all qualify because the buyer eventually receives them as part of the purchased good. Many states extend this to items consumed during production, such as sandpaper that wears away while finishing wood surfaces, even though nothing of them remains in the final product.
Production Machinery and Equipment
Industrial equipment used directly on the production line is a major exempt category: lathes, injection molds, welding robots, conveyor systems that move products between manufacturing stages, and similar machines. The requirement is a direct connection to the physical transformation of the product. Equipment that supports operations without touching production, like forklifts used exclusively in a finished-goods warehouse, usually does not qualify.
Consumables and Catalysts
Lubricants, coolants, chemical catalysts, and similar items that keep production machinery running qualify in most states, even though they never become part of the finished product. Their rapid depletion during manufacturing justifies the exemption. The line gets drawn at general facility supplies. Hand soap in the restroom, cleaning solution for break rooms, and paper towels in the front office serve the people in the building, not the production process, and stay taxable.
Packaging and Shipping Materials
Single-use packaging that transfers to the customer with the product is exempt in most states. Boxes, shrink wrap, labels, tape, cans, bottles, and packing materials all qualify when they leave the facility with the finished good. Reusable containers that come back to the manufacturer, like returnable pallets or drums, often lose the exemption because ownership never transfers to the customer. Misclassifying returnable containers as exempt is a common audit finding.
Utilities and Fuel
Electricity, natural gas, water, and other fuels consumed directly in production qualify for partial or full exemption in many states. Powering a kiln, generating steam for a chemical process, or running assembly-line robots are typical qualifying uses. Energy consumed for general purposes, like office lighting, break room HVAC, or warehouse heating, does not qualify. Because most facilities run production and non-production areas off the same meter, manufacturers often need a utility study that calculates the exempt percentage of total consumption. That means cataloging every piece of equipment drawing power and estimating annual usage for each.
Software and R&D Equipment
Software that directly controls production equipment can qualify in some states. A program that operates a CNC machine or monitors temperature during a chemical reaction has a strong case. Design software like CAD, which helps engineers plan products but doesn’t operate machinery, sits in a grayer area and varies by jurisdiction. The general principle is that software must control or monitor an active production step, not just generate reports about it. Some states also extend manufacturing-style exemptions to equipment used in qualified research and development activities, including prototyping and testing.
What Stays Taxable
Office computers, break room furniture, landscaping equipment, janitorial supplies, and anything else that supports the business without participating in production remains fully taxable. Administrative vehicles, security systems, and general-purpose tools used for building maintenance also fall outside the exemption. The line between “production” and “everything else” is the single most important distinction in manufacturing tax compliance, and drawing it correctly on every purchase prevents most audit problems.
How to Claim the Exemption
Manufacturers claim the exemption at the point of sale by giving the vendor a completed exemption certificate. The certificate tells the seller not to collect sales tax on that transaction and shifts the burden of proving the purchase was genuinely exempt to the manufacturer. Sellers are expected to accept these certificates in good faith when they appear complete and reasonable.
A certificate typically requires the manufacturer’s legal business name, state tax identification number, a description of the items being purchased, and a statement of how they will be used in production. Vague descriptions invite problems. Listing a purchase as “industrial equipment” when the certificate should say “CNC lathe for production line” gives auditors a reason to question whether the item genuinely qualifies.
Manufacturers operating in multiple states may be able to use the Multistate Tax Commission’s Uniform Sales and Use Tax Resale Certificate for purchases of materials and components that become part of products made for resale.1Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate – Multijurisdiction Several states require their own specific forms for machinery and equipment exemptions, so the uniform certificate does not always cover every exempt purchase. Confirm with each state’s tax authority which forms they accept.
Keep copies of every exemption certificate issued to vendors on file. Most states allow auditors to look back three to four years from the filing date, though some extend that window to six or seven years when tax has been significantly underreported or no return was filed at all. Digital records are acceptable and easier to retrieve during a review. Losing a certificate can convert a legitimate exempt purchase into a taxable one, because without documentation there is no proof the exemption applied.
When You Owe Use Tax Instead
When a manufacturer buys something taxable from a vendor who doesn’t collect sales tax, use tax fills the gap. This comes up most often with out-of-state purchases, online orders, and transactions where the seller has no obligation to collect tax in the manufacturer’s state. The rate matches whatever combined state and local sales tax would have applied if the purchase had been made locally.
Combined state and local rates currently range from around 4% in low-tax areas to more than 11% in the highest-tax jurisdictions, with most locations falling between 6% and 9%. Manufacturers report use tax either on a dedicated use tax return or as a line item on their regular sales tax filing, depending on the state. Tracking and paying it is the manufacturer’s responsibility, and “nobody told me I owed it” has never worked as a defense.
Common taxable items manufacturers sometimes overlook include office furniture, break room appliances, company vehicles not used in production, and building maintenance supplies. Anything purchased with an exemption certificate that later gets redirected to a non-exempt use also triggers a use tax obligation. Buying a machine tax-free for the production line and then moving it to a warehouse role means you owe use tax on it from the date of reassignment.
Dual-Use Equipment
Equipment that splits time between exempt manufacturing and non-exempt activities creates a classification problem. A compressor that runs the production line 70% of the time but also powers tools in the maintenance shop the other 30% is a common example. Many states resolve this with a predominant use standard: if the equipment spends more than 50% of its operating time on qualifying production activities, the entire purchase qualifies for exemption. Below that threshold, the full purchase price is taxable.
Documenting predominant use requires more than an estimate. States that apply this standard typically expect a formal study showing actual usage data, including which activities the equipment supports and how operating hours break down between exempt and non-exempt use. Doing the analysis before the purchase, or at least before the next return is filed, creates a defensible record. Trying to prove predominant use retroactively during an audit is much harder and far less convincing.
Selling Across State Lines
Manufacturers that sell products across state lines face sales tax collection obligations that expanded dramatically after the Supreme Court’s 2018 decision in South Dakota v. Wayfair. That ruling eliminated the old requirement that a business needed a physical presence in a state before the state could require it to collect sales tax.2Supreme Court of the United States. South Dakota v. Wayfair, Inc., 585 U.S. (2018) Now, exceeding an economic threshold is enough to create a collection obligation.
The most common threshold is $100,000 in sales into a state during the prior or current year, and the vast majority of states with a sales tax have adopted it. A handful set higher bars. Even manufacturers selling exclusively to other businesses are affected, because the obligation applies to gross sales, not just taxable ones. Exempt sales to resellers count toward the threshold in many states, which means a manufacturer could owe a collection obligation in a state where every single sale is tax-free.
Once a manufacturer crosses the threshold in a new state, registering, collecting the correct rate, and filing returns become mandatory. The Streamlined Sales and Use Tax Agreement, which more than 20 states participate in, simplifies some of this by standardizing tax base definitions, offering centralized registration, and creating uniform sourcing rules.3Streamlined Sales Tax Governing Board. Streamlined Sales and Use Tax Agreement For states outside the agreement, each state’s rules apply on their own terms.
Drop shipping adds another layer. When a manufacturer ships directly to a customer’s end buyer, who collects sales tax depends on where the manufacturer, the retailer, and the buyer are located, and who has nexus where. The safest practice is to collect a valid resale certificate from the retailer for every drop-shipped order. Without that certificate, the manufacturer may be on the hook for the uncollected tax.
What Auditors Look For
The single most common trigger for a sales tax audit is a mismatch between what a manufacturer reports on federal income tax returns and what appears on state sales tax filings. Auditors routinely compare gross revenue across returns, and unexplained gaps invite scrutiny. A manufacturer reporting $5 million in revenue to the IRS but only $3 million in taxable sales to the state will get questions about where the other $2 million went, even if the gap is entirely explained by exempt sales.
Fixed asset purchases are another audit magnet. Auditors check depreciation schedules to find equipment purchases made during the audit period and verify whether sales or use tax was properly paid or exempted. Buying a $200,000 machine tax-free with a manufacturing exemption certificate and having no documentation to prove it’s used in production is exactly the kind of finding that turns a routine audit into an assessment.
Expired, incomplete, or missing exemption certificates account for a large share of audit adjustments. Even when a purchase genuinely qualifies, the absence of a properly completed certificate leaves the auditor no basis to accept the exemption. Some manufacturers issue blanket certificates to regular vendors that cover all qualifying purchases over a set period. That’s efficient, but blanket certificates still need to be updated when they expire or when the purchasing relationship changes.
Reclassified equipment catches manufacturers off guard too. A machine bought tax-free for production that gets reassigned to a testing lab or maintenance shop may no longer qualify. States expect manufacturers to self-assess use tax when an asset’s role changes, and auditors know to look for exactly this situation on the depreciation schedule.
States Without a Sales Tax
Alaska, Delaware, Montana, New Hampshire, and Oregon impose no statewide sales tax, so manufacturers based entirely in those states do not need exemption certificates for in-state purchases. Alaska allows local jurisdictions to impose their own sales taxes, which can complicate matters for manufacturers operating in certain municipalities there. Manufacturers in no-tax states still face use tax obligations and collection requirements when selling into states that do impose sales tax, especially after Wayfair expanded the reach of economic nexus rules.