California courts use software that determines the amount of child support. These calculations are used statewide, whether you live in Alameda County, Santa Clara County, or San Mateo County, etc. These programs are available online for free.
The state of California has provided this service to the public:
These calculations will generally cost you money when prepared by your attorney. There is a “first time” charge in the $100.00 range. Some attorneys will assist you for the limited purpose of helping establish child support