Would you have any idea how much will it cost you to register a sole proprietor business in the Philippines?

As far as I know, registration fee varies per city. But just to make sure, I suggest you allocate around 5,000 pesos. I based it from these articles. Here's some further read that might be helpful for your concern. http://businessdiary.com.ph/3634/business-registration-steps-the-easy-way/ http://businessdiary.com.ph/3634/business-registration-steps-the-easy-way/