Sales & Use Tax FAQ for Manufacturers

Manufacturers face sales and use tax obligations on both sides of every transaction — what they buy and what they sell. Managing resale certificates from customers, claiming production exemptions on raw materials and equipment, tracking use tax on out-of-state vendor purchases, and maintaining compliance across multiple states where goods are shipped all create a compliance footprint that is broader than most industries. This FAQ covers the most common manufacturing sales and use tax questions — from production exemptions and MRO taxability to multi-state nexus, contract manufacturing, and audit preparation. For a review of your specific situation, contact ACTSOLV to schedule a consultation.

What are the most common sales tax challenges for manufacturers?

Manufacturers face sales and use tax obligations on both sides of the ledger — purchases and sales — which makes their compliance footprint more complex than most industries. On the purchase side, the key challenges are determining which raw materials, components, and equipment qualify for production exemptions, tracking use tax on purchases from out-of-state vendors who did not charge tax, and managing vendor certificates for tax-exempt inputs. On the sales side, manufacturers must identify which customers are purchasing for resale versus end use, collect and maintain valid exemption certificates for tax-exempt sales, and manage sales tax collection across all states where they have nexus.

The most common pain points are expired or missing resale certificates from customers, use tax exposure on equipment and supply purchases, and the complexity of determining which inputs qualify for production exemptions in each state where they operate. Read more about sales tax challenges for manufacturers and how ACTSOLV addresses both sides of the compliance equation. If your organization is evaluating whether to invest in automation, 5 ways to build a business case for sales tax technology provides a practical framework.

What is a manufacturing production exemption and how does it work?

A manufacturing production exemption is a state sales tax exemption that allows manufacturers to purchase certain inputs without paying sales tax, on the theory that those inputs will be incorporated into or directly used in the production of taxable finished goods. Most states provide some form of manufacturing exemption, but the scope varies significantly. Some states provide a broad exemption covering all machinery, equipment, and materials used in the manufacturing process. Others provide a narrower exemption limited to materials that become a physical component of the finished product.

The exemption typically applies to raw materials, component parts, and direct production equipment. It generally does not apply to office equipment, administrative supplies, packaging materials used after the production process is complete, or maintenance, repair, and operations supplies used to maintain the facility rather than to manufacture the product. Understanding exactly where your state draws these lines is essential to claiming the exemption correctly and avoiding audit exposure. CertSOLV helps manufacturers maintain the exemption certificate documentation required to support these claims, and AUTOSOLV identifies purchase transactions where exemptions may have been missed or incorrectly applied.

How should manufacturers handle resale certificates from customers?

When a manufacturer sells finished goods to a distributor, retailer, or another party purchasing for resale, the sale is generally exempt from sales tax — but only if the seller has a valid resale certificate on file. The resale certificate is the documentation that justifies not charging sales tax. Without it, the transaction is presumed taxable, and the seller bears the liability if audited. Manufacturers must collect a valid certificate from each resale customer, verify that it is properly completed and appropriate for the state where the sale is occurring, and retain it in a retrievable system.

The certificate must match the type of goods being sold — a retailer's general resale certificate covers merchandise they will resell, but it does not cover purchases of items they will use in their own operations. Most states require certificates to be renewed every one to three years. Managing this across a large customer base with sales into multiple states is one of the most common compliance burdens for manufacturers, and it is one of the first things auditors examine. CertSOLV automates the collection, validation, and renewal tracking process so your certificate file is always audit-ready. Read more about why collecting exemption certificates from day one matters and the most common pitfalls in exemption certificate management.

What is use tax and when do manufacturers owe it?

Use tax is the complement to sales tax and applies when a manufacturer purchases taxable goods or services without paying sales tax — most commonly from an out-of-state vendor who was not registered to collect in the manufacturer's state. For manufacturers, use tax obligations arise most frequently on purchases of equipment, machinery, and supplies from out-of-state vendors who do not charge tax; on raw materials or components purchased across state lines without a sales tax charge; on items pulled from exempt inventory for internal use rather than incorporation into a finished product; and on software, SaaS tools, and other digital services used in the business.

Use tax is self-assessed and remitted directly to the state by the manufacturer. It does not get collected automatically at the point of purchase, which is why it is so commonly overlooked. A manufacturer that makes significant purchases from out-of-state suppliers without tracking use tax exposure can accumulate a material liability over years that surfaces during an audit. AUTOSOLV automates use tax accrual by evaluating vendor invoices against current state taxability rules and generating the correct liability for each applicable purchase. Read more about the forgotten need for exemption certificates for use tax and the revenue risk of use tax non-compliance for manufacturers.

Do manufacturers need to collect sales tax on their sales of finished goods?

It depends on who the buyer is and where the sale occurs. When a manufacturer sells to a distributor or retailer who will resell the goods, the sale is generally exempt from sales tax — provided the manufacturer has a valid resale certificate on file. When a manufacturer sells directly to end consumers — through a company store, a website, or direct sales — those sales are taxable in most states, and the manufacturer must collect and remit sales tax. For manufacturers who sell to both resellers and end consumers, maintaining a clear distinction in your billing and exemption documentation systems is essential.

Selling to an end consumer without collecting tax is a compliance failure. Collecting tax from a reseller who should be tax-exempt creates customer friction and short-pay disputes. Getting the customer classification right, supported by proper certificate documentation, is the foundation of clean sales-side compliance for manufacturers. CertSOLV ensures your exempt resale customers are flagged in your billing workflow and documented correctly, eliminating both the missed-collection risk and the incorrect-invoice problem. Read more about balancing customer service with tax compliance when managing a mixed resale and direct-sale customer base.

What creates sales tax nexus for manufacturers operating in multiple states?

Manufacturers can create nexus in multiple states through physical presence and economic activity. Physical nexus is established by having a factory, warehouse, distribution center, sales office, employees, or equipment stored in a state. For manufacturers, this often includes states where service technicians travel regularly, states where consignment inventory is stored at customer locations, and states where sales representatives are regularly present. Economic nexus — established through sales volume or transaction counts — applies to manufacturers who sell directly to customers in states where they cross the threshold, most commonly $100,000 in annual sales or 200 transactions.

After the 2018 South Dakota v. Wayfair Supreme Court decision, virtually every state now enforces economic nexus rules. Manufacturers with multi-state distribution and a mix of resale and direct-to-consumer sales should conduct a nexus review across all states where they ship product, not just where they have plants or warehouses. Review economic nexus thresholds by state to understand where your current sales footprint is creating obligations, and read more about the practical implications in how growing companies manage expanding compliance obligations as they expand their customer base.

Are maintenance, repair, and operations supplies taxable for manufacturers?

In most states, maintenance, repair, and operations supplies — commonly referred to as MRO — are taxable purchases for manufacturers, even when those manufacturers otherwise qualify for a production exemption on raw materials and equipment. The distinction most states draw is between inputs directly used in the production process and inputs used to maintain or repair the facility and equipment. Lubricants, cleaning supplies, safety equipment, tools, and replacement parts for production machinery generally fall into MRO territory and are taxable unless a specific exemption applies.

Some states extend the manufacturing exemption to include MRO items directly consumed in the production process. Others tax all MRO regardless of use. Because MRO spend can be substantial for large manufacturing operations, the tax treatment of these purchases is worth reviewing carefully. Manufacturers who have been exempting MRO purchases under an assumption that the production exemption covers all plant purchases may have significant exposure if that assumption is incorrect under their state's specific rules. AUTOSOLV applies current state-specific taxability rules to every vendor purchase category, including MRO, so these determinations are made correctly rather than by assumption. Read more about the hidden costs of manual tax compliance that compound when MRO and other purchase categories are misclassified.

How does contract manufacturing affect sales tax obligations?

Contract manufacturing — where a manufacturer produces goods using materials or specifications provided by a customer — creates a tax situation that varies significantly by state. The core question is whether the transaction is characterized as a sale of services, a sale of tangible personal property, or a combination of both. In states that tax only tangible goods, contract manufacturing may be treated as a non-taxable service if the customer provides the raw materials and the manufacturer is charging only for labor and processing. In states that tax services broadly, the manufacturing fee itself may be subject to sales tax.

When the manufacturer purchases materials and sells finished goods to the customer, the transaction more clearly resembles a taxable sale of tangible personal property, subject to normal sales and use tax rules. The ownership of materials at each stage, the structure of the contract, and the state's classification of manufacturing services all affect the outcome. Contract manufacturers working across multiple states should analyze each state's treatment separately rather than applying a single rule. Contact ACTSOLV to discuss how your contract manufacturing arrangements should be structured and documented for optimal tax treatment.

What exemption documentation do manufacturers need to provide when purchasing raw materials and equipment?

When a manufacturer purchases raw materials, components, or equipment that qualify for a manufacturing production exemption, the manufacturer must provide the vendor with a valid exemption certificate claiming that exemption before the purchase. Each state has its own required form or acceptable certificate format. The certificate must identify the buyer, the seller, the basis for the exemption — in this case, the manufacturing production exemption — and must be signed by an authorized representative of the purchasing business.

Some states accept the Streamlined Sales Tax uniform certificate, while others require their own state-specific forms. A resale certificate is not the correct document for claiming a production exemption on equipment purchases — these are distinct exemption types and require distinct documentation. Manufacturers should maintain a clear distinction between resale certificates used for purchases that will be incorporated into finished goods, and manufacturing exemption certificates used for machinery and equipment used in the production process. CertSOLV provides a centralized system for managing both types of certificates across all vendor relationships, ensuring the right certificate is on file for every exempt purchase category. See how to handle expired or invalid certificates to understand what happens when documentation lapses during an audit.

How can ACTSOLV help manufacturers manage exemption certificates and use tax compliance?

Manufacturing companies face the full complexity of sales and use tax compliance on both the purchase and sale side simultaneously — more so than almost any other industry. CertSOLV automates the collection, validation, and storage of exemption certificates from customers, ensuring that every resale customer has a valid, current certificate on file before a tax-exempt sale is processed. It validates certificates against state-specific requirements, stores them in a centralized and searchable system, and flags certificates for renewal before they expire — eliminating the gaps that drive audit assessments.

AUTOSOLV automates use tax compliance on the purchase side, evaluating vendor invoices against current state taxability rules, identifying purchases where use tax is owed, and generating the correct accruals automatically. For manufacturers purchasing from a large number of out-of-state vendors across multiple categories — equipment, raw materials, MRO, and software — AUTOSOLV eliminates the manual review burden and ensures that no taxable purchase goes unaccrued. Together, these tools address the two most common sources of sales and use tax exposure for manufacturers: missing or invalid exemption certificates from customers and unaddressed use tax on vendor purchases. Read the ACTSOLV case study on streamlining compliance to see how automated certificate and use tax management changes audit outcomes in practice.