Cal. Code Regs. tit. 18, § 1700
(a) Reimbursement for Sales Tax.
(2) Presumptions. Certain presumptions concerning the addition of sales tax reimbursement are created by Civil Code Section 1656.1. It shall be presumed that the parties agreed to the addition of sales tax reimbursement to the sales price of tangible personal property sold at retail to a purchaser if:
(C) The retailer posts in his or her premises in a location visible to purchasers, or includes on a price tag or in an advertisement or other printed material directed to purchasers, a notice to the effect that reimbursement for sales tax will be added to the sales price of all items or certain items, whichever is applicable.
It shall be presumed that the property, the gross receipts from the sale of which is subject to the sales tax, is sold at a price which includes tax reimbursement if the retailer posts in his or her premises, or includes on a price tag or in an advertisement (whichever is applicable) one of the following notices:
(b) Excess Tax Reimbursement.
(3) Evidence Sufficient to Establish that Excess Amounts have been or will be Returned to Customer.
(A) If a person already has refunded to each customer amounts collected as reimbursement for tax in excess of the tax due, this may be evidenced by any type of record which can be verified by audit such as:
(B) If a person has not already made sales tax reimbursement refunds to each customer but desires to do so rather than incur an obligation to the state, the person must:
(4) Offsets. If a person who has collected excess tax reimbursement on a transaction fails or refuses to refund it to the customer from whom it was collected, the excess tax reimbursement shall be offset against any tax liability of the taxpayer on the same transaction. Any excess tax reimbursement remaining after the offset must be refunded to the customer or paid to the state. The offset can be made when returns are filed, when a determination is issued, or when a refund is claimed. Such offsets can be made only on a transaction by transaction basis. Tax reimbursement collected on a specific transaction can be used only to satisfy a tax liability arising from the same transaction. The “same transaction” means all activities involved in the acquisition and disposition of the same property. The “same transaction” may involve several persons, such as a vendor, a subcontractor, a prime contractor, and the final customer; or a vendor, a lessor, and a series of sublessors. Tax reimbursement can be offset against the tax liability of the taxpayer whether the liability was satisfied by paying sales tax reimbursement to a vendor, paying use tax to a vendor, or paying use tax to the state.
An offset of a taxpayer's own tax liability against tax reimbursement collected from a customer can be made only with respect to transactions in which possession of the property upon which the taxpayer's tax liability is based is transferred, either permanently or temporarily, to the customer, as in the case of construction contracts or leases. A taxpayer such as a repairman or printer who uses shop supplies or printing aids in performing a job for a customer cannot offset the tax liability arising from the use of the supplies or aids against tax reimbursement collected from the customer.
A person who claims that a tax liability on a transaction should be offset against tax reimbursement paid to the state by another person has the burden of proving that tax reimbursement was in fact paid to the state on the same transaction by the other person. In the absence of such proof no offset will be allowed.
The offset allowances explained above are procedural changes mandated by statute and apply to all proceedings pending before the board on and after September 7, 1982.
(5) Particular Applications. (Examples at 8.25 percent tax rate.)
(A) Discounts and trading stamps.
1. Discounts. A retailer who allows discounts on sales prices but charges customers tax reimbursement computed upon the prices before the discount is deducted is collecting excess reimbursement.
For example, a sale is made for $100 plus $8.25 as tax reimbursement. Upon payment for the item the purchaser is allowed a discount of 20 percent of the sales price of $100 but the $8.25 tax reimbursement is excluded from the computation. Since the retailer is deducting the amount of the discount, $20, from taxable gross receipts, the retailer is actually paying a tax of only $6.60, i.e., 8.25 percent of $80, and has retained excessive tax reimbursement of $1.65.
2. Trading Stamps. A retailer who issues trading stamps or similar evidences of patronage may deduct as cash discounts the cost to the retailer of the stamps or other indicia (hereinafter called “stamps”) issued in connection with taxable retail sales. A retailer who deducts the cost of stamps as a cash discount in computing the tax payable to the state, but who charges tax reimbursement on the full sales price of the goods, collects more tax reimbursement than the retailer pays to the state. The following illustration shows why this is true: If a retailer collects sales tax reimbursement of $8.25 on a $100 sale but gives the customer trading stamps which cost the retailer $2 and then deducts the $2 as a cash discount when reporting taxable receipts, the retailer will pay a tax of only $8.08 (8.25 percent of $98).
The retailer must follow one of the three following procedures:
(B) Construction Contractors. (See Regulation 1521 (18 CCR 1521) for application of tax to construction contractors generally) A contractor furnishes and installs materials under a lump sum construction contract for the improvement of real property and collects tax reimbursement on the total contract price. As the contractor is the consumer of materials furnished and installed in the performance of the lump sum contract, the tax reimbursement collected on the total contract price constitutes excess tax reimbursement. Such excess tax reimbursement must be returned to the customer or paid to the state. However, offsets will be allowed as explained in (b)(4).
Under a lump sum contract to improve real property, a subcontractor furnishes and installs materials which were acquired without the payment of sales or use tax. The prime contractor collects tax reimbursement from the prime contractor's customer on the total contract price and pays all of the tax reimbursement collected to the state. The subcontractor's use tax liability on the materials consumed in performing the contract will be offset against the tax reimbursement paid to the state by the prime contractor, and the subcontractor has no further tax liability on the transaction. The tax reimbursement paid to the state by the prime contractor in excess of the use tax liability of the subcontractor will be refunded to the prime contractor only if it is returned to the customer.
Note: Authority cited: Section 7051, Revenue and Taxation Code. Reference: Section 6901.5, Revenue and Taxation Code; and Section 1656.1, Civil Code. Leases, see also regulation 1660; Meals, tips and other charges as tax-included amounts, see regulation 1603; “Free meals,” charging reimbursement on, see regulation 1670; Trading stamps generally, see regulation 1671; Trade-ins generally, see regulation 1654.
1. New Appendices G and H filed 5-15-73 as an emergency; designated effective on the same date that any statute becomes operative on or after June 1, 1973, which increases the combined rates of the state and local sales and transaction taxes to 6 percent and 6 ½ percent (Register 73, No. 20). For prior history, see Register 72, No. 45.
2. Certificate of Compliance filed 8-28-73 (Register 73, No. 35).
3. New subsection (c)(8) filed 5-30-75; effective thirtieth day thereafter (Register 75, No. 22).
4. Amendment filed 12-29-78; effective thirtieth day thereafter. Pursuant to Section 7051, Revenue and Taxation Code, order establishes an operative date of 1-1-79 for certain provisions (see subsection (a)) (Register 78, No. 52).
5. Editorial correction of subsections (b)(3)(B) and (b)(4)(B)2. (Register 79, No. 6).
6. Editorial correction filed 8-7-84 (Register 84, No. 32).
7. Editorial correction filed 6-26-85; effective thirtieth day thereafter (Register 85, No. 26).
8. Change without regulatory effect amending subsections (a)(3) and (b)(5)(B)-(D) and repealing appendices filed 11-17-94 pursuant to section 100, title 1, California Code of Regulations (Register 94, No. 46).
9. Change without regulatory effect amending subsections (b)(5) and (b)(5)(A)1.-2. filed 5-13-2010 pursuant to section 100, title 1, California Code of Regulations (Register 2010, No. 20).