California Code, Welfare and Institutions Code - WIC § 11155.3

(a) It is the intent of the Legislature in enacting this section to provide counties and recipients of aid under Chapter 2 (commencing with Section 11200) with increased flexibility to determine allowable business expenses and income reporting periods in order to facilitate local microenterprise development, maximize opportunities for a family to become self-sufficient, and reduce unnecessary paperwork processing by county staff.

(b) Self-employment net income shall be used in computing the aid grant under Chapter 2 (commencing with Section 11200).

(c) For purposes of determining the self-employment net income for applicants and recipients of aid under Chapter 2 (commencing with Section 11200), applicants and recipients may choose to deduct a standard deduction of 40 percent of gross income or verified actual self-employment expenses to the same extent allowed in CalFresh pursuant to Chapter 10 (commencing with Section 18900) of Part 6.  Applicants and recipients may change the method of deduction only when a redetermination of eligibility is conducted by the county or every six months, whichever occurs first.