For a PhD, will the company or sponsor take care of all expenses?

It depends. Some PhD sponsors or companies may fully cover all expenses - including tuition, living costs, and research fees - especially if your research matches their interests. Others might only provide partial funding or cover specific costs like tuition or a living stipend.

Funding terms vary widely, and some sponsors may expect you to work on projects relevant to them. Always clarify exactly what your sponsor will cover before committing.