A resale certificate is a document a business gives its supplier to buy goods without paying sales tax, because it's going to resell them and collect tax from the final customer. The seller keeps the certificate as its evidence for not charging tax, and each state sets its own form, contents and record keeping rules.
I've taken the rules here from the California Tax Service Center, the Texas Comptroller, the Florida Department of Revenue and the Illinois Department of Revenue, all read in October 2026. The biggest misunderstanding I see is people treating a sales tax permit number as if it were the certificate. In Texas, the Comptroller says plainly that it isn't.
How a resale certificate works
- You register with your state to collect sales tax.
- You buy stock from a supplier and give them a resale certificate instead of paying sales tax.
- The supplier keeps the certificate as proof of why they didn't charge tax.
- You sell the goods to your customer and collect sales tax on that sale.
- You report and pay that tax to the state.
The tax is collected once, at the final sale, rather than at every step in the chain.
The rules in four big states
| State | Form | How long the seller keeps it | One detail to know |
|---|---|---|---|
| California | Any form with the required contents, or the state's blank certificate | See Publication 103 | Must include the buyer's seller's permit number, unless they aren't required to hold one |
| Texas | Form 01-339 | Four years | A copy of the buyer's sales tax permit is not a substitute for the certificate |
| Florida | Florida Annual Resale Certificate for Sales Tax | Three years for copies | Issued to every business registered to collect sales tax |
| Illinois | Form CRT-61, or the buyer's own certificate | Kept in the retailer's books and records | A copy must be given to the retailer |
What California needs on the certificate
California lets the certificate be in any form, as long as it contains:
- The purchaser's seller's permit number, unless they aren't required to hold one.
- A description of the property being bought.
- An explicit statement that the property is being bought for resale.
- The signature of the purchaser or someone authorised to act for them.
If the buyer doesn't need a seller's permit, for example because they don't make sales in California, they must say so on the certificate and explain why. The state's guide for the detail is Publication 103, Sales for Resale.
Texas: the permit number trap
This is the insight I'd want every Texas supplier to know. The Comptroller says resale certificates require the purchaser's Texas taxpayer number, but the customer's sales tax permit number, or a copy of their permit, is not a substitute for a resale certificate and doesn't relieve the seller of the duty to collect tax. If all you've got on file is a permit copy, you've got nothing.
A few more Texas rules from the Comptroller:
- A customer who buys only for resale can give a blanket resale certificate covering all purchases.
- If a buyer pulls an item out of resale stock and uses it, they owe tax on it. The Comptroller's example is a broom bought for resale and then used to sweep the store.
- Buyers shouldn't use a certificate if there's any question whether they'll resell the item.
- Sellers should question a certificate that doesn't fit the buyer's business, such as a service station buying a sofa.
Florida's annual certificate and verification
Florida works differently. Businesses that register to collect sales tax are issued an Annual Resale Certificate. A buyer gives the seller a copy, and the seller documents each sale in one of several ways: keep a copy of the customer's current certificate for three years, or get a transaction authorization number for each sale by phone on 877-FL-RESALE, online, or through the state's app. A transaction authorization number only covers that one purchase, so you need a new one for each sale.
Illinois: CRT-61
Illinois retailers must keep a certificate of resale in their books and records for each tax-exempt sale for resale. Buyers can use Form CRT-61 or make their own certificate, and a copy has to be given to the retailer. The state points to its administrative code, section 130.1405, for what a valid certificate must contain.
Using one correctly
- Register for sales tax in each state where you're required to collect it.
- Use the state's own form, or check your own form has every required item.
- Only use it for goods you'll resell, or for items your state lets you include.
- Separate resale and non-resale items on mixed orders.
- As a seller, keep certificates for at least as long as your state requires.
If you're working out where you need to register, my business licence guide covers the other registrations, and my sales tax software roundup covers tools that store certificates for you.
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My verdict
A resale certificate is simple in principle and strict in the detail. Get the state's form, fill in every field, and as a seller keep it for the full period your state sets. In Texas especially, a permit copy isn't enough. Fraudulent use carries criminal and civil penalties in Florida, so only use a certificate for goods you'll resell.
Frequently asked questions
What is a resale certificate?
It's a document a business gives its supplier to buy goods tax free because it will resell them and collect tax from the final customer.
Is a sales tax permit the same as a resale certificate?
No. The Texas Comptroller says a customer's permit number or permit copy is not a substitute for a resale certificate.
How long do I keep resale certificates?
Texas says four years. Florida says three years for copies of customers' Annual Resale Certificates. Check your own state's rule.
What is a blanket resale certificate?
In Texas, a customer who buys only for resale can give one certificate covering all purchases, stating everything will be resold.
What form is used for a resale certificate in Illinois?
Form CRT-61, Certificate of Resale, or the buyer's own certificate with the required contents.
Who issues the resale certificate in Florida?
The Florida Department of Revenue issues an Annual Resale Certificate to businesses registered to collect sales tax.
Can I use a resale certificate for things I use in my business?
No. If you use an item bought for resale, you owe tax on it, as the Texas Comptroller's broom example shows.
