Good question @Wilie..Business registration is dependent on the type of the business, whether a one person business (sole proprietorship) partnership or a limited liability company.
According to the Business Registration Service website, a sole proprietorship business registration is 850 shillings and Ksh 200 for every additional business branch..
Business registration process is online and can be done through the E-Citizen platform or seek assistance on how to go about it in Huduma Centres.