Free Tax Guide
What Is a California Sales Tax Exemption? [Definition Examples]
Key Takeaway
California sales tax exemptions fall into four main categories: (1) resale (goods purchased for resale under CDTFA-230); (2) specific property exemptions (food for home consumption, prescription medicine, certain farm products); (3) buyer-based exemptions (government, nonprofit); and (4) partial exemptions (manufacturing equipment under RTC §6377.1). The short version is that most exemptions require specific documentation — exemption certificates from the buyer — and CDTFA audits exemption claims rigorously. Misuse of resale certificates is one of the most common audit findings.1
CDTFA auditing your exemptions? A 15-minute consultation is free.
Exemptions are the most audited area in California sales tax. Understanding which exemptions apply and documenting them correctly is the difference between a clean audit and a large assessment. This chapter walks through the four main categories.
For sales tax overview, see What is CA Sales Tax?. For resale specifically, see Resale Audits.
If CDTFA is challenging a sales tax exemption you claimed — or you’re unsure which exemptions apply:
California sales tax exemptions are narrow and frequently disputed in audits. A free 15-minute call covers whether the exemptions you applied were correctly documented, what the CDTFA’s examination process looks like, and what your options are if they’re disallowed.
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The Four Categories of CA Sales Tax Exemptions
Most CommonResale
Specific PropertyFood / Medicine
Buyer-BasedGovernment / Nonprofit
PartialManufacturing Equip
| Category | Authority | Documentation2 |
|---|---|---|
| Resale | RTC §6091 | Form CDTFA-230 |
| Specific Property | RTC §6359, §6369, §6374 | Category-based |
| Buyer-Based | RTC §6381, §6368 | Exemption certificate |
| Manufacturing Partial | RTC §6377.1 | CDTFA-230-M certificate |
Quick Reference
Jump to category: resale, specific property, buyer-based, or partial manufacturing.
1. Resale Exemption
The most common exemption — purchases for resale are exempt from sales tax under RTC §6091. Requires CDTFA-230 resale certificate from buyer.
If this is you: Wholesaler or retailer selling to resellers. Collect valid CDTFA-230 from each reseller customer. Retain for audit. Resale certificate audits are common.
Resale Certificate Strategy
- Obtain CDTFA-230 before making exempt sale.
- Verify buyer’s seller’s permit.
- Retain certificate for audit period + statute.
- Update certificates periodically.
- Challenge conversions (resale item used for non-resale).
2. Specific Property Exemptions
California exempts specific categories of property from sales tax. Food for home consumption (RTC §6359), prescription medicine (§6369), certain farming products (§6358), newspapers and periodicals (§6362.5), and others.
If this is you: Your business sells items in exempt categories. No exemption certificate from buyer required — the item itself is exempt. Documentation of the sales by category is required for audit.
3. Buyer-Based Exemptions
Certain buyers are exempt regardless of property: US government (RTC §6381), foreign diplomats, certain nonprofit organizations (§6375 limited).
If this is you: Selling to exempt buyers. Obtain buyer’s exemption certificate. State-government, county-government, and city-government purchases are typically exempt with proper certificates.
4. Partial Manufacturing Exemption (RTC §6377.1)
California offers a 3.9375% partial exemption on manufacturing equipment used in qualified research and development or manufacturing. Reduces the effective rate from 7.25% to 3.3125% on qualified purchases.
If this is you: Manufacturer or R&D company purchasing qualifying equipment. Form CDTFA-230-M certificate. Partial exemption applies to state portion only; district taxes still apply at full rate.
CDTFA auditing exemption claims? Resale certificate audits are common. Book a consultation.
CA Exemption Document Lookup
| Document | Purpose |
|---|---|
| CDTFA-230 | General Resale Certificate |
| CDTFA-230-M | Manufacturing Partial Exemption |
| CDTFA-230-G | Government Exemption |
| CDTFA-230-D | Diplomatic Exemption |
| RTC §6091 | Resale exemption |
| RTC §6359 | Food exemption |
| RTC §6369 | Prescription medicine |
| RTC §6377.1 | Manufacturing partial |
| CDTFA Publication 103 | Sales for Resale |
Exemption Statute
- 3-year CDTFA audit statute.
- 8-year for substantial understatement.
- Unlimited for fraud.
- Certificates must be retained for at least the audit period.
Exemption Audit Patterns
| Issue | Typical Outcome |
|---|---|
| Missing resale certificates | Assessment on exempt claimed sales |
| Expired certificates | Assessment |
| Invalid buyer seller’s permit | Assessment |
| Converted inventory (resale → own use) | Use tax on converted |
| Manufacturing partial exemption misuse | Assessment of partial portion |
Exemption Audit Escalation
Examination to Disallowance
CDTFA reviews exemption documentation. Missing or invalid certificates trigger disallowance and assessment.
Assessment to Petition
30-day Petition for Redetermination window.
Appeals Review
CDTFA Appeals, OTA, Superior Court paths.
First 48 Hours of Exemption Audit
- Compile all exemption certificates for audit period.
- Verify buyer seller’s permits.
- Reconcile exempt sales to documented exemptions.
- Identify any conversions or misuse.
- Engage counsel for material cases.
★
Brotman Law has represented taxpayers in CDTFA exemption audits across every category. Based in San Diego.
The ROI Question
Exemption audit assessments can be six figures. Professional defense produces documentation and challenges that save multiples of the fee.
When to Engage Attorney
- Exemption audit notice.
- Resale certificate dispute.
- Manufacturing partial exemption audit.
- Exemption certificate volume issues.
Exemption audit?
15-minute consultation is free.
Guide Chapters
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Frequently Asked Questions
What is a California sales tax exemption?
A specific category of sale that is not subject to California sales tax. Four main categories: resale (goods for resale), specific property (food, medicine, certain farm products), buyer-based (government, nonprofit), and partial exemptions (manufacturing equipment). Each has specific documentation requirements.
What is a CA resale certificate?
Form CDTFA-230 documentation from a retail purchaser stating the purchase is for resale. Exempts the transaction from sales tax collection. Issuer assumes responsibility for collecting sales tax on the eventual retail sale. Must be valid, timely, and in good faith.
What's exempt from CA sales tax?
Food for home consumption (not restaurant meals), prescription medicine, certain farming products and equipment, newspapers and periodicals, sales to U.S. government, sales to certain nonprofits, resale transactions with valid certificates. Services are generally exempt (not specifically listed as taxable).
What is the CA manufacturing exemption?
Partial exemption under RTC §6377.1. 3.9375% rate reduction on qualified manufacturing and R&D equipment. Reduces the state portion only; district taxes remain at full rate. Form CDTFA-230-M certificate required.
Are services exempt from CA sales tax?
Generally yes — California sales tax applies to tangible personal property, not services. Specific exceptions exist for services that create or transfer tangible personal property. Pure services remain outside sales tax scope.
Do nonprofits pay sales tax in California?
Generally yes as buyers of property, unless a specific exemption applies. Certain religious, charitable, and educational nonprofits may have specific purchase exemptions. Sales by nonprofits are generally taxable unless otherwise exempt.
How long must I keep CA resale certificates?
At least the audit statute period — 3 years for standard, 8 for substantial understatement, longer for fraud-adjacent cases. CDTFA routinely audits resale certificate documentation. Maintain systematic retention.
Can I use an out-of-state resale certificate in CA?
Generally no. California requires CDTFA-230 or an acceptable equivalent. Out-of-state certificates may be accepted in limited circumstances but CDTFA-230 is the safe practice.
What if my resale certificate is invalid?
The retailer is liable for the sales tax on the transaction. CDTFA assesses the uncollected tax plus penalties and interest on transactions with invalid certificates. Verify seller’s permits before accepting certificates.
Are online sales tax exemptions different?
Same exemption rules. Online sales to out-of-state buyers may be non-taxable due to destination. Resale and other exemptions require the same documentation as in-person sales. Marketplace facilitator rules affect collection responsibility but not exemption scope.
Can I claim the manufacturing partial exemption retroactively?
Yes, within the refund statute period. Amended CDTFA returns or refund claims can capture partial exemption on qualifying historical purchases. 3-year refund statute applies.
Are clothing sales exempt in California?
No — California taxes clothing sales. Unlike some states (New York, Minnesota) with clothing-specific exemptions, California applies the standard sales tax to clothing. Some specific items within the food exemption (like food stamps purchases) may affect taxability.
How do I claim a CA sales tax exemption?
The buyer presents a valid exemption certificate (CDTFA-230 for resale, CDTFA-230-M for manufacturing, CDTFA-230-G for government, etc.). The seller verifies the certificate and accepts the exemption. The seller retains the certificate for audit. Specific property exemptions (food, medicine) apply automatically without buyer certificate.
Next Steps in This Guide
Exemption question? 15-minute consultation is free.
- Exemption statutes: RTC Division 2 Part 1.
- Documentation drawn from CDTFA practice and Brotman Law case experience.
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