You can't do any work if the total job cost more then 500 dollars. In other words if I'm a general on a new home, you can't just do the sprinklers because the sprinkler project was under 500. The whole project which is the building of the home is over 500. It keeps the GC from saying everybody's a sub that's making 500 or less.Curious,,,, so in CA no license if all work is legitimately under $500, but what about a business account, insurance etc.. you still need to be set up as a proper business correct? The $500 dollar rule doesn't mean you can be a pirate and work under the table.