If a customer's extended-warranty company authorizes and gets billed for a repair, does the auto dealer have to charge Missouri sales tax on the parts used, even though the warranty company claims it's tax-exempt?

Plain-English summary

The Missouri Department of Revenue ruled that when an auto dealer repairs a customer's vehicle under an extended warranty and bills the parts to the warranty company ("Company"), those parts sales are subject to Missouri state and local sales tax.

The dealer's normal process was to estimate the needed repair, submit it to Company for authorization, and then bill Company for the parts used. Company claimed it didn't have to pay sales tax and backed that up with a document it called a "Multi-State Certification." The Department disagreed. Under Section 144.020.1, RSMo, Missouri taxes sellers on the privilege of selling tangible personal property at retail, and the ruling found nothing in the facts showing the parts were purchased for resale, nor did Company otherwise qualify for any exempt status. On top of that, the Department made clear it does not recognize the "Multi-State Certification" form as a valid Missouri exemption certificate at all.

Because neither a resale exemption nor any other exemption applied, and because the certificate Company offered wasn't one the Department accepts, the dealer's sales of the warranty repair parts to Company came out fully taxable.

What this means for you

Auto dealers and repair shops handling warranty work

If a customer brings in a vehicle under an extended warranty and you bill the parts to the warranty company rather than the customer, don't assume the sale is tax-exempt just because the warranty company says so. Unless the warranty company gives you a Missouri-recognized exemption certificate (and actually qualifies for resale or another exemption), you should charge and collect Missouri state and local sales tax on those parts just as you would on any other retail parts sale.

Dealers presented with a "Multi-State Certification"

This ruling specifically flags that a "Multi-State Certification" document is not accepted by the Missouri Department of Revenue as a valid exemption certificate. If a warranty company or any other customer hands you this particular form to avoid tax, treat the sale as taxable unless they can provide documentation the Department actually recognizes.

Accountants and tax professionals

The analysis here is narrow but useful as a template: absent proof the property is purchased for resale, or that the buyer holds a recognized exempt status, sales of tangible personal property at retail are taxable under Section 144.020.1, RSMo. Warranty administrators sometimes present nonstandard "certifications" to dealer clients, and this ruling is a reminder to verify the certificate type before treating a sale as exempt.

Common questions

Q: Does an extended warranty change how sales tax applies to repair parts?
A: Not in this ruling. The existence of a warranty program didn't exempt the parts sold to the warranty company; the Department taxed the sale the same as any other retail sale of tangible personal property because no resale or exempt status was shown.

Q: We were given a "Multi-State Certification" by a warranty company — can we rely on it to skip sales tax?
A: Based on this ruling, no. The Department stated it does not recognize the Multi-State Certification form as a valid exemption certificate, so it does not support a tax-exempt sale.

Q: Who actually owed the tax here — the dealer or the warranty company?
A: The ruling addresses the dealer's obligation as the seller: Section 144.020.1, RSMo, imposes the tax "upon all sellers for the privilege of engaging in the business of selling tangible personal property... at retail." The dealer's sales to the warranty company were found taxable.

Q: Does this ruling apply to my dealership if I have a similar warranty arrangement?
A: Not automatically. This is a letter ruling binding on the Department only as to the specific Applicant who requested it, only for three years from its date, and only as long as the facts and the underlying law don't change. No other taxpayer can rely on it directly — it shows how the Department reasoned on these facts, but your own facts and documentation would need to be evaluated separately.

Q: What would change the outcome?
A: The ruling suggests two things would matter: proof the parts were purchased for resale, or proof the buyer held a valid exempt status backed by a certificate the Department actually recognizes. Neither was present here.

Citations and references

• Section 536.021.10, RSMo (authority for the Director of Revenue to issue letter rulings)
• Section 144.020.1, RSMo (imposes sales tax on sellers for the privilege of selling tangible personal property or taxable services at retail)
• 12 CSR 10-1.020 (Missouri Code of State Regulations governing the letter ruling process)

Source

• Landing page: Missouri DOR Rulings Search
• Ruling: LR 8402

Original ruling text

Dear Applicant:

This is a letter ruling issued by the Director of Revenue under Section 536.021.10, RSMo, and Missouri Code of State Regulations 12 CSR 10-1.020, in response to your letter dated May 14, 2026.

The facts as presented in your letter ruling request are summarized as follows:

Applicant is a Missouri automobile dealer which also services automobiles. When customers present with a extended warranty, Applicant's standard procedure is to prepare an estimate for the necessary repairs and submit the required information to Company for authorization.  Company has asserted that it is exempt from sales tax and has provided a document identified as a Multi-State Certification.

ISSUE 1:

Are sales to Company as a part of the warranty repair process subject to Missouri state and local sales tax?

RESPONSE 1:

Yes. Applicant's sales to Company of parts relative to the warranty repair process are subject to Missouri state and local sales tax.

Section 144.020.1, RSMo, provides: "A tax is hereby levied and imposed [...] upon all sellers for the privilege of engaging in the business of selling tangible personal property or rendering taxable service at retail in this state."

There is no indication Applicant's products are sold in anticipation of resale, nor does Company as an entity occupy an exempt status, so the repair parts are subject to tax. The Multi-State Certification form presented is not recognized by the Department of Revenue as a valid exemption certificate.

This letter ruling is binding upon the Department of Revenue with respect to the Applicant for three (3) years from the date of this letter and is subject only to statutory changes by the General Assembly and to changes in the interpretation of law by the courts or administrative tribunals.  If a change occurs, the taxpayer who relies upon an outdated interpretation may be subject to additional taxes, interest, and penalties, which may be imposed prospectively from the date of the change.  For this reason, the interpretation set forth above should be reviewed on a regular basis.  Please note that any change in or deviation from the facts as presented will render this ruling inapplicable.

Should additional information be needed, please contact Associate Counsel Kent L. Brown General Counsel's Office, Post Office Box 475, Jefferson City, Missouri 65105-0475, phone (573) 751-0961.

Sincerely,

Trish Vincent