Down payment cap
On a home improvement contract the down payment may not exceed $1,000 or 10 percent of the contract price, whichever is less, and the contract must state that cap in bold type. A contractor carrying a performance and payment bond approved by the registrar is exempt from the cap. Later progress payments may not exceed the value of the work performed and materials delivered.
Business and Professions Code section 7159 (California) (opens in new tab) · CSLB: progress payment restrictions bulletin (opens in new tab)