California Code, Elections Code - ELEC § 8105

(a) The filing fees for all candidates shall be paid at the time the candidates obtain their nomination forms from the county elections official. The county elections official shall not accept any papers unless the fees are paid at the time required by this section, or unless satisfactory evidence is given to the county elections official or to the registrar of voters that the fee has been paid at the time of the declaration of candidacy in another county. The county elections official shall transmit the appropriate fees to the Secretary of State at the time he or she delivers the declarations of candidacy for filing. All filing fees received by the Secretary of State and county elections officials are nonrefundable.

(b) The filing fees for candidates required to file declarations of intention pursuant to Section 8023 shall be paid at the time the declarations are filed with the county elections official.