Exemption Certificates & B2B Sales

Are resale certificates valid across multiple states?

Most state-issued resale certificates are only valid in the state that issued them. To make an exempt purchase across multiple states, buyers use the MTC Uniform Sales and Use Tax Certificate (accepted in most states) or the SST Exemption Certificate (accepted across SST member states). Sellers must verify which certificates their state accepts.

Do I need exemption certificates from universities, hospitals, and nonprofits?

Yes, sellers must collect valid state-issued exemption certificates from nonprofits, universities, and hospitals before exempting their purchases. A 501(c)(3) IRS determination letter alone is not sufficient. Each state issues its own exemption documentation and may require a separate application from the nonprofit.

Do I need to upload exemption certificates for SST filing?

SST filing through a CSP does not require bulk uploading of exemption certificates to the SST system. Sellers retain their certificates locally. The CSP's audit liability protection applies when a seller accepted a certificate in good faith: the certificates don't need to be pre-submitted to receive that protection.

Does selling wholesale automatically exempt me from collecting sales tax?

Selling wholesale does not automatically exempt a sale from sales tax. The exemption applies only when the buyer provides a valid resale certificate, without one, the seller must collect tax. Selling to a business doesn't make the sale automatically exempt; the buyer's intent to resell and a valid certificate are both required.

How do I accept a resale certificate from a B2B buyer?

To accept a resale certificate, collect the state-specific or SST uniform form, verify it's complete and signed, check the buyer's registration number, and retain it. Here's the step-by-step process.

How do I collect and store exemption certificates from customers?

Exemption certificates must be collected before or at the time of sale and retained in a retrievable format for audit purposes. Most states require certificates to be kept for 3-5 years after the last exempt sale to that customer. Digital storage is accepted; the key requirement is retrieval on audit demand.

How do I manage exemption certificates across multiple states?

Multi-state exemption certificate management requires matching each certificate to the correct state form, tracking expiration by state, and maintaining audit-ready records. The SST uniform certificate simplifies 24 states to one form.

How do I validate that an exemption certificate is legitimate?

Sellers are required to verify that an exemption certificate is facially valid, complete, plausible, and not obviously fraudulent. Sellers are not required to independently verify whether the buyer actually qualifies. Good-faith acceptance of a facially valid certificate generally protects the seller from audit liability.

How does a CSP's audit liability shield work in SST states?

Sellers who use a Certified Service Provider (CSP) in SST member states receive statutory audit liability protection for miscalculations caused by relying on CSP-provided rates and calculations. If the CSP calculates tax incorrectly and the seller followed the CSP's output, the liability shifts to the CSP, not the seller. This protection is unique to the SST CSP designation and has no equivalent in non-SST states.

How long are exemption certificates valid?

Exemption certificate validity periods vary by state, typically 1 to 5 years. SST states use a standard 5-year cycle. Here's what expires when and how to manage renewals.

What certificate management software options exist for scaling B2B sellers?

Certificate management software automates the collection, validation, storage, and renewal tracking of exemption certificates. Major options include Avalara CertCapture, Vertex Certificate Center, and EXEMPTAX. These tools integrate with tax engines and ERP systems to manage certificates at scale, typically necessary above 100-200 exempt customers.

What happens if I accept an invalid exemption certificate?

If you accepted an invalid exemption certificate and didn't collect tax, you owe the tax, not the buyer. Good faith acceptance of a facially valid certificate protects you. Here's how the liability works.

What is a blanket exemption certificate?

A blanket exemption certificate covers all purchases of the same type from a buyer over a period, rather than one certificate per transaction. Most states allow them for ongoing B2B accounts. Here's when they apply and what limits them.

What is a direct pay permit and what do I do when a buyer presents one?

A direct pay permit lets large buyers pay use tax directly to the state rather than paying sales tax to vendors. When a buyer presents one, you sell without charging tax and retain the permit as your documentation.

What is an exemption certificate and when do I need one?

An exemption certificate is a document a buyer provides to claim a tax-exempt purchase. Sellers must collect and retain them to avoid owing the tax themselves. Here's how they work.

What is the difference between a resale certificate and an exemption certificate?

A resale certificate is a specific type of exemption certificate used by buyers who intend to resell the product. Exemption certificate is the broader term covering all reasons a sale may be exempt, resale, nonprofit status, manufacturing, government purchase, and others. A resale certificate is always an exemption certificate, but not all exemption certificates are resale certificates.

What is the SST Exemption Certificate, and is it accepted in all SST states?

The SST Exemption Certificate is a standardized exemption form accepted by all 24 SST member states. A buyer fills out one certificate and it serves as the exemption documentation for purchases from any SST-registered seller in any SST state. CSPs like TaxCloud are required to accept it.

What R&D and manufacturing exemptions exist, and how do I qualify?

Most states exempt machinery, equipment, and direct-use inputs in manufacturing and sometimes R&D. The scope varies significantly, some states require the exempt item to directly contact the manufactured product; others apply a broader 'used in' standard. Sellers must collect an exemption certificate claiming the manufacturing or R&D exemption.

Who qualifies as an exempt buyer?

Exempt buyers include resellers (with a valid resale certificate), qualifying nonprofits, government entities, and in some states manufacturers and R&D operations. The buyer must provide a valid exemption certificate for each applicable exemption type. Business status alone doesn't make a buyer exempt.