How to Use an Ohio Sales Tax Exemption Certificate

An Ohio sales tax exemption certificate is a form you give the seller — not the state — declaring a legally recognized reason your purchase shouldn’t be taxed. Once you hand over a properly completed certificate, the vendor stops collecting the 5.75 percent state sales tax (plus any local additions) on that sale and keeps the form in their records.¹ Getting the form filled out correctly, choosing the right version, and delivering it on time are what actually make the exemption work.

Whether Your Purchase Qualifies

Ohio law presumes every sale is taxable until the buyer proves otherwise, and Ohio Revised Code 5739.02 sets out the categories that rebut that presumption.² The reason you write on the certificate has to match one of them. The categories most buyers use:

Resale. You’re buying goods to resell to end consumers. This requires an active Ohio vendor’s license, and the items have to actually be resold — not pulled off the shelf for your own operations.

Manufacturing. Machinery, equipment, and materials used directly in production qualify under ORC 5739.011. “Directly” is doing real work in that sentence: the item has to act on the product, move it through a continuous production process, or be consumed in the manufacturing itself.³ A lathe on the production floor, yes. Office furniture in the same building, no.

Agriculture. Equipment and supplies used primarily to produce goods for sale — tractors, seed, and the like — are exempt, but items incorporated into real property (a permanent fence, for example) fall outside this category.⁴

Nonprofits and churches. Purchases by churches, 501(c)(3) organizations, and other Ohio nonprofits operated exclusively for charitable purposes are exempt.² Ohio reads “charitable purposes” broadly — relieving poverty, improving health, running homes for the aged, operating noncommercial broadcasting, and more.

Government. Ohio, its political subdivisions, and other states that reciprocally exempt Ohio’s purchases don’t pay sales tax on their buys.²

If your reason doesn’t fit one of the statutory categories, no certificate will make the sale exempt. Vague reasons like “business purposes” won’t hold up under audit.

Which Form to Use

Ohio offers three certificate options, and picking the right one depends mostly on how often you buy from the vendor.

STEC B: Blanket Exemption Certificate

Use STEC B when you’ll be making repeated qualifying purchases from the same vendor. One form covers all future qualifying sales and stays in effect until you revoke it or your business relationship changes.⁵ One important limit: construction contractors cannot use STEC B to buy materials that will be incorporated into real property under an exempt construction contract. Those purchases follow separate rules under Ohio Administrative Code 5703-9-14.⁶

STEC U: Unit Exemption Certificate

Use STEC U for a single transaction. It’s the right choice when you don’t expect to buy from that vendor again, or when you want a paper trail tied to one specific purchase.⁷

Streamlined Sales Tax Certificate

Ohio is a full member of the Streamlined Sales and Use Tax Agreement, so vendors here also accept the multi-state SST exemption certificate. If you’re an out-of-state buyer using one form across several member states, that’s the version to reach for. Ohio hosts it alongside STEC B and STEC U on the Department of Taxation website.

Filling It Out Correctly

Ohio Administrative Code 5703-9-03 requires five elements on every exemption certificate. Miss one and the certificate is invalid.⁸

Purchaser’s name and business address. Use the legal name registered with the state, not just a trade name or DBA.
State tax identification number, if you have one. That’s your Ohio vendor’s license number or consumer’s use tax account number. The “if any” language means a nonprofit or other buyer without such a number isn’t automatically disqualified, but note why no number applies.
Type of business or organization: manufacturer, retailer, farmer, charitable organization, government entity, and so on.
Reason for the exemption, matching one of the ORC 5739.02 categories.
Signature of the purchaser on hard-copy certificates. Electronic certificates don’t require a wet signature because the administrative code allows electronic exchange.

By signing, you’re certifying under penalty of law that the information is true. The STEC U form itself spells out that willfully issuing a false exemption certificate results in a refund of the unpaid tax, interest, and an additional penalty of up to 15 percent.⁷

Giving It to the Vendor

Deliver the completed certificate at or before the time of sale. If it’s not in the vendor’s hands by then, they’re legally required to charge you sales tax, and refunds after the fact are painful for everyone involved.

You do not file the certificate with the Ohio Department of Taxation. The vendor holds onto it as proof of why no tax was collected. Because the administrative code allows electronic exchange, most online retailers accept uploads through a tax-exemption portal or by email.⁸ In-store, the customer service desk usually handles it before checkout.

If the vendor doesn’t have a certificate on file within 90 days of the sale, Ohio presumes the transaction was taxable. There is a further backstop in ORC 5739.03: after a written notice of intent to levy an assessment, the vendor has 120 days to either prove the sale was exempt or obtain a valid certificate in good faith.⁹ Treat that window as an emergency remedy, not a plan.

When an Exempt Purchase Later Becomes Taxable

An exemption applies to a use, not to an object. If you buy inventory tax-free for resale and then take items off the shelf for your own use, or you buy manufacturing equipment exempt and later repurpose it for something that wouldn’t qualify, you owe use tax on the value at the point of conversion. Ohio’s use tax runs at the same 5.75 percent state rate plus applicable local rates and exists to catch exactly this pattern.¹ You self-assess and report it on your Ohio use tax return. Skipping that step doesn’t hide it; auditors look specifically for exempt purchases that never left the business.

Penalties for Misuse

A buyer who willfully issues a false certificate owes the unpaid tax, interest, and an additional penalty of up to 15 percent of the tax that should have been collected.⁷ “Willfully” matters — honest confusion about which category applies is handled differently from deliberate fraud.

Two problems come up most often. First, claiming resale on items you clearly consume yourself, like office supplies. Second, a blanket certificate that was accurate years ago but no longer reflects how you actually buy — you claimed resale when you filed it, but recent orders are all for internal use. Revoke and replace blanket certificates when your purchasing pattern shifts.

Records to Keep

Vendors are required to keep exemption certificates and related sales records for at least four years and make them available for inspection during business hours; the tax commissioner can extend that period by written order.¹⁰ Keep your own copy too. If a vendor closes or loses paperwork and can’t produce your certificate during an audit, your copy is what saves the exemption. In an audit, the examiner requests every certificate on file and matches it against the sales records; anything missing or incomplete gets treated as a taxable sale unless someone can prove otherwise.

1
Ohio Department of Taxation. Sales and Use Tax
2
Ohio Legislative Service Commission. Ohio Revised Code 5739.02 – Levy of Sales Tax, Purpose, Rate, Exemptions
3
Ohio Legislative Service Commission. Ohio Administrative Code Rule 5703-9-21 – Sales and Use Tax, Manufacturing
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Ohio Legislative Service Commission. Ohio Administrative Code Rule 5703-9-23 – Sales and Use Tax, Agriculture
5
Ohio Department of Taxation. Sales and Use – Exemption Certificates and Statements of Exempt Sales
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Ohio Department of Taxation. ST EC B – Blanket Exemption Certificate
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Ohio Department of Taxation. ST EC U – Unit Exemption Certificate
8
Ohio Legislative Service Commission. Ohio Administrative Code Rule 5703-9-03 – Sales and Use Tax, Exemption Certificate Forms
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Ohio Legislative Service Commission. Ohio Revised Code 5739.03 – Tax Collection and Certificate Requirements
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Ohio Legislative Service Commission. Ohio Revised Code 5739.11 – Records Open to Inspection, Exemption Certificate