Manufacturers do charge sales tax, but only on a narrow slice of their sales: transactions where the buyer is the final user of the product. Sales to wholesalers, distributors, retailers, or other manufacturers who will resell the goods or build them into another product are exempt under the resale exemption. Because most of a manufacturer’s revenue flows through the supply chain rather than to end users, the majority of transactions are tax-free. The work lies in documenting the exemptions correctly and tracking where collection is actually required.
When a Manufacturer Has to Collect
Collection kicks in whenever the buyer will use the product rather than resell it. Direct-to-consumer sales through an online store, a factory outlet, or a phone order are the clearest case. In those transactions the manufacturer is functionally a retailer and owes the same duties any store would.
The same rule catches sales of items outside the normal product line. Selling off surplus office furniture, a decommissioned machine, or a used delivery truck to a company that will use it internally is taxable. The buyer isn’t feeding the item back into the supply chain, so tax applies.
Even then, collection is required only in states where the manufacturer has nexus, the legal connection that creates a collection duty. Without nexus in the destination state, there is no obligation to collect. When there is nexus, the applicable rate is the combined state, county, and municipal rate at the delivery address.
Forty-five states impose a statewide sales tax. The five that do not are Alaska, Delaware, Montana, New Hampshire, and Oregon.1Tax Foundation. State and Local Sales Tax Rates, 2026
The Resale Exemption
The resale exemption is what keeps sales tax from stacking at every link in the supply chain. When a manufacturer sells to a wholesaler or retailer who will resell the product, no tax is charged. Tax is collected later, when the product reaches the person who will use it. Without this rule, every business-to-business transaction would embed a layer of tax in the price, a problem known as tax pyramiding.
The exemption isn’t limited to finished goods. When a manufacturer sells component parts to another manufacturer who incorporates them into a finished product, that sale qualifies too. The component is taxed only when the completed product reaches an end user.
Intent is the pivot. The buyer must genuinely plan to resell the item in the ordinary course of business. Not every purchase by a retailer qualifies: if a retailer buys a product to use as a permanent display model, give away as a promotion, or consume internally, that purchase is taxable. Verify the buyer’s stated purpose before accepting an exemption claim.
The legal burden sits on the manufacturer as the seller. If an auditor examines the transaction and no valid exemption certificate is on file, the manufacturer owes the uncollected tax plus penalties and interest, even if the sale genuinely qualified. Documentation is the only real protection.
Drop Shipping
Drop shipping trips manufacturers up regularly. A retailer takes an order from a customer and directs the manufacturer to ship the product straight to that customer. Two transactions occur: the retailer’s retail sale to the customer, and the manufacturer’s wholesale sale to the retailer, which should qualify as a resale.
The problem arises when the retailer has no nexus in the state where the customer receives the goods but the manufacturer does, often because it ships from a warehouse there. Most states let the manufacturer accept alternate documentation from the retailer to prove the transaction is a resale, but what qualifies varies by state. Manufacturers that drop ship into multiple states have to track each state’s specific rules or risk getting stuck with the tax.
Economic Nexus and Out-of-State Sales
Before 2018, a manufacturer only had to collect sales tax in states where it had a physical presence. The Supreme Court’s decision in South Dakota v. Wayfair changed that by letting states require collection based purely on economic activity within their borders.2Supreme Court of the United States. South Dakota v. Wayfair, Inc.
Every state with a sales tax has since enacted an economic nexus law. The most common threshold is $100,000 in sales into the state during the current or prior calendar year. A few states set higher bars: Alabama and Mississippi use $250,000, while California and New York require $500,000. Once a manufacturer crosses the applicable threshold, it must register, collect, and remit sales tax on all taxable sales into that state, regardless of where the manufacturer is physically located.3Streamlined Sales Tax Governing Board. Remote Seller Thresholds Terms
When states first adopted these laws, most included an alternative trigger of 200 separate transactions. That’s changing. As of January 2026, roughly half the states with economic nexus laws have eliminated their transaction threshold entirely, leaving only the dollar amount. Colorado, Illinois, Indiana, Iowa, Maine, and North Carolina have all dropped the transaction count in recent years. About 18 states still use a transaction-based alternative.
Do Exempt Wholesale Sales Count Toward the Threshold?
This is where manufacturers get blindsided. Whether tax-exempt wholesale transactions count toward the economic nexus threshold depends on how each state defines its threshold. States that use “gross sales” include everything, even sales that would be exempt when filed. States that use “retail sales” exclude sales for resale but include other exempt sales. States using “taxable sales” count only transactions that actually generate tax.3Streamlined Sales Tax Governing Board. Remote Seller Thresholds Terms
A manufacturer doing $5 million in wholesale business into a gross-sales state will blow past the threshold even if every single transaction is exempt from tax. The registration obligation still triggers, and the manufacturer must file returns even if every sale reported is non-taxable.
Shipping and Delivery Charges
Whether tax applies to shipping depends on the state and on how the charge appears on the invoice. Some states tax delivery as part of the selling price regardless of how it’s billed. Others exempt shipping when it’s a separate line item but tax it when bundled into the product price. A smaller group exempts delivery charges entirely.
Itemize shipping separately on every invoice. In states that distinguish between bundled and separately stated charges, this one formatting choice can save the buyer money and reduce audit exposure for the manufacturer. When a shipment mixes taxable and exempt products under a single delivery charge, some states require the manufacturer to allocate the charge proportionally, taxing only the portion tied to the taxable goods. Delivery charges on wholesale transactions generally follow the underlying sale: if the sale is exempt as a resale, so is the shipping.
Exemption Certificates
An exemption certificate is the manufacturer’s proof that a sale was legitimately tax-free. Without one on file, the manufacturer is liable for the uncollected tax if the transaction is audited, even if the sale genuinely qualified. Auditors routinely pull a sample of exempt transactions and check for certificates first. Missing paperwork is the fastest route to a large assessment.
A properly completed certificate typically includes the buyer’s name, address, and state tax identification number, the reason for the exemption, a description of the property being purchased, and a signature from an authorized representative of the buying company. Each state has its own form and its own rules for what counts as complete.
The Streamlined Sales Tax Certificate of Exemption simplifies this for transactions involving its 24 member states, letting a single form cover purchases across multiple jurisdictions.4Streamlined Sales Tax Governing Board. Exemptions Not every exemption type is available in every member state, so confirm that the specific exemption claimed on the form is valid where the sale occurs.
Member states of the Streamlined agreement relieve sellers of tax liability when they obtain a properly completed certificate within 90 days of the sale.5Streamlined Sales Tax Governing Board. Relaxed Good Faith Requirement Outside the Streamlined system, most states apply a similar good-faith standard: if the manufacturer accepted a certificate that appeared reasonable on its face and had no reason to believe the claim was fraudulent, liability shifts to the buyer.
Retain certificates for at least the length of the state’s assessment period. Most states use a three-year statute of limitations for sales tax assessments, though several set it at four years, and the period extends to six or more years when a return substantially understates tax owed. If no return was filed at all, many states impose no time limit. Keeping certificates for a minimum of four years, and longer in states with extended periods, is the safest approach.
What Non-Compliance Costs
Failing to collect or remit sales tax goes well beyond paying back taxes. Failure-to-file penalties typically run from 5% to 25% of the tax due, depending on the state and how late the return is. Some states charge a flat percentage; others impose a monthly escalating penalty that caps at 25% or higher. Interest accrues separately on the unpaid balance from the original due date until payment.
The larger risk is a retroactive assessment. If a manufacturer crossed an economic nexus threshold two years ago and never registered, the state can assess tax on every taxable sale made during that entire period, plus penalties and interest running from each missed filing date. For a manufacturer with significant sales volume into a state, one overlooked registration can generate a six-figure liability.
Manufacturers that come forward before an audit begins can often reduce or eliminate penalties through a state’s voluntary disclosure agreement program. Most states offer them. They typically waive penalties and limit the look-back period in exchange for registering and becoming compliant going forward. Once an audit notice arrives, that option is off the table.