A tax exemption certificate looks like a single-page form on which a buyer declares, under signature, that a purchase qualifies for a sales tax exemption. It has a header identifying the seller and buyer, a row of checkboxes for the buyer’s business type, a grid of state tax registration numbers, a checkbox or short entry for the reason the purchase is exempt, a written description of the goods and of the buyer’s business, and a dated signature line at the bottom. The most widely recognized version is the Multistate Tax Commission’s Uniform Sales and Use Tax Resale Certificate, accepted in roughly 38 states.1Multistate Tax Commission. Uniform Sales and Use Tax Exemption Certificate
The Fields on the Form
Nearly every exemption certificate, whether it comes from a single state or a multi-jurisdictional body, collects the same information in roughly the same order. Reading top to bottom, here is what you see:
- Seller information. The full legal name and address of the business making the sale, filled in either by the seller or by the buyer before handing it over.
- Buyer information. The full legal name and address of the purchaser claiming the exemption. Both names must match official registration records.
- Business type. A row of checkboxes identifying the buyer as a wholesaler, retailer, manufacturer, lessor, or other category.
- State registration numbers. On multi-state forms, a grid listing each participating state where the buyer enters its sales tax permit or registration number for every state it is registered in. On a single-state form, just one number field.
- Reason for exemption. A checkbox or short line indicating why the purchase is exempt: resale, manufacturing use, nonprofit status, agricultural use, or another qualifying category.
- Description of property. A written description of the tangible goods or taxable services being purchased, plus a general description of the buyer’s business so the seller can confirm the purchase fits the buyer’s normal operations.
- Signature and date. An authorized officer, partner, or owner signs and dates the form, certifying that the information is accurate and the purchase qualifies for exemption.
Some versions add a checkbox near the signature for a blanket certificate covering ongoing purchases, which is discussed further down. State-specific forms may add extra checkboxes for exemption reason codes that only apply in that state, but the underlying anatomy is the same.
Which Version You’ll See
Three form families cover almost every certificate a buyer or seller encounters, and they look similar enough that once you have seen one, the others are easy to recognize.
The MTC Uniform Certificate
The Multistate Tax Commission’s Uniform Sales and Use Tax Resale Certificate is a single page designed to work across roughly 38 participating states. It carries the MTC heading at the top, followed by the seller and buyer fields, the business-type checkboxes, and the large multi-state registration grid that is its most distinctive feature. Below the grid sit the description fields and the signature block. A cautionary paragraph on the form reminds sellers to make sure the goods being sold are the type normally resold, leased, or used as a component in the buyer’s manufacturing process.2Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate – Multijurisdiction
The Streamlined Sales Tax Certificate
The Streamlined Sales Tax Exemption Certificate is accepted by all 24 member states of the Streamlined Sales Tax Governing Board. The layout is comparable to the MTC form but uses a single tax identification field with an option to indicate which state issued it, rather than the multi-state grid. If a buyer is not registered in the state where the purchase is happening, the Streamlined form allows the buyer to provide the home state’s ID number instead.3Streamlined Sales Tax Governing Board. Exemptions
State-Specific Forms
Individual states publish their own exemption certificates, often with designations like ST-120 for a resale certificate or similar numbering conventions. They live as PDFs on the state Department of Revenue website. The fields are essentially the same as the MTC form, sometimes with additional state-specific checkboxes or exemption reason codes. For a purchase in a state that participates in neither the MTC nor the Streamlined system, the state’s own form is the only option.
How the Form Changes by Exemption Type
The certificate itself stays a one-page form, but which checkbox gets marked and what supporting information appears in the description field depends on why the purchase is exempt.
Resale Certificates
The most common version is a resale certificate, used when a retailer or wholesaler buys inventory it plans to resell to end customers. Sales tax is deferred to the point when the consumer eventually buys the product. On the form, the buyer checks the resale reason and describes the goods in a way that matches its business. A wholesaler buying electronics for resale, for example, would note that the goods are for resale rather than internal office use. The MTC’s Uniform Certificate is titled as a resale certificate and is the standard form for these transactions across most participating states.2Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate – Multijurisdiction
Nonprofit Certificates
Organizations recognized under 26 U.S.C. ยง 501(c)(3), including charities, religious organizations, and educational institutions, can often purchase goods and services without paying sales tax.4Office of the Law Revision Counsel. 26 US Code 501 – Exemption From Tax on Corporations, Certain Trusts, Etc. A federal tax-exempt determination letter from the IRS does not automatically exempt an organization from state sales tax, so most states require a separate application. The certificate a nonprofit presents to a vendor typically requires a copy of or reference to both the federal determination letter and the state-issued exemption number, entered in place of a standard sales tax registration number. Qualifying organizations and covered purchases vary significantly from state to state, and a nonprofit operating across state lines may need to secure separate exemptions in each state where it buys.
Government and Educational Institution Certificates
Federal, state, and local government agencies, along with public schools and universities, generally hold a distinct tax-exempt status. These entities use their own exemption certificates or government purchase orders, which look similar to a standard certificate but identify the agency and cite its statutory exemption rather than a resale reason. The exemption applies only to purchases made for official government or institutional purposes, not personal purchases by employees.
Manufacturing and Agricultural Certificates
A majority of states offer exemptions for machinery and equipment used directly in manufacturing or agricultural production. On the certificate, the buyer checks the manufacturing or agricultural reason and writes a detailed description of how the equipment will be used. That description carries weight, because states draw a line between equipment that is an integral part of production and general office equipment, furniture, or building fixtures used for administration or marketing. A tractor used on a farm qualifies; the office computer used to manage the farm’s books generally does not. A machine on a factory floor that transforms raw materials qualifies; the breakroom microwave does not. Each state draws this line slightly differently, which is why the description field on this type of certificate tends to be longer than on a plain resale certificate.
Blanket vs. Single-Purchase
Near the signature block, most exemption certificates include a checkbox marking the form as either a blanket certificate or a single-purchase certificate. A blanket certificate covers all similar future purchases from the same vendor indefinitely, so a plumbing wholesaler buying copper tubing from a manufacturer every month can hand over one form rather than generating paperwork with each order. A single-purchase certificate covers only one specific transaction, which makes sense for a one-time buy from a vendor you don’t expect to use again.
If your address, tax ID number, or business circumstances change after issuing a blanket certificate, you provide the vendor an updated version. The vendor can also request an updated certificate at any time. Otherwise, a blanket certificate stays in effect as long as you continue making exempt purchases from that vendor. Expiration rules vary widely: roughly half the states impose no formal expiration date, while others set defined periods ranging from one year to ten years, with some falling in the three-to-five-year range and a few requiring annual renewal.
Filling It Out Correctly
Accuracy on every field matters more than anything else. Legal names and addresses should match your official business registration exactly. The tax identification number is your state-issued sales tax registration number or seller’s permit number, though some states accept the Federal Employer Identification Number instead. On the MTC form, you enter a registration number for each state where you are registered; on the Streamlined form, if you are not registered in the purchase state, you can enter your home state’s ID number.3Streamlined Sales Tax Governing Board. Exemptions
The description of goods or services should be clear and specific, since vague descriptions invite problems during audits. The signature must come from an authorized officer, partner, or owner. If any required field is blank or the certificate is otherwise incomplete when handed to a seller, the seller is required to collect the full sales tax amount, and the buyer’s exemption effectively disappears for that transaction. Most modern retailers accept scanned or digital copies of completed certificates, and many have online portals where you can upload a certificate to be stored on file so that sales tax is automatically removed at checkout for future purchases.