What all should a budget include?

Answer 1

Which Budget -- is it a Personal Budget or a Business Budget?

OF Course, in either case, the NECESSARY Costs (Shelter, Utilities, needed supplies/food) must be placed in the budget. You need to look at Maslow's Hierarchy of Needs (the bottom part of the pyramid) to really understand the NECESSITIES of life for a personal budget -- it simplifies your thoughts quite appropriately.

Other than this generality, I can't really add more because the question is too general in nature.

Answer 2

Everything you expect to spend and earn over the period being budgeted.