CALIFORNIA FRANCHISE TAX BOARD Internal Procedures Manual Page 1 of 4Multistate Audit Technique Manual _______________________________________________________________________________ 7000 APPORTIONMENT FORMULA Apportionment is the process by which business income is divided between taxing jurisdictions. The apportionment formula calculates the percentage of the property, payroll and sales of the unitary business, which are attributable to California. The total business income of the unitary business is multiplied by this percentage to derive the amount of business income apportioned to this state. For purposes of the apportionment formula, the property factor generally includes all real and tangible personal property owned or rented and used by the taxpayer during the taxable year, and the payroll factor includes all forms of compensation paid to employees. These factors are intended to reflect the capital investment and labor activities that generate income. The sales factor generally includes all gross receipts from the sale of tangible and intangible property, and is intended to recognize the contribution of the market state towards the production of income. Prior to 1993, California followed the model UDITPA formula (see MATM 0500). This was a three-factor formula that gave equal weight to the property, payroll and sales of the business. This formula operated as follows: For taxable years beginning on or after January 1, 1993, ...