When you are calculating expenses for a project, it is easy to forget the office supplies and other expenses you might incur while working on the project.

A journal or a spreadsheet will help log and keep track of all your expenses on a per project basis. If you don't wish to keep exact details, it is still necessary to track all your expenses.

It is also necessary to separate your "living expenses" from your "business expenses".

What are some expenses for a web firm or company?

What are some expenses for a freelancer or contractor?