Hi, I was wondering about this question.
I am a student too, and have been abroad for the year (not working), however, I also got a small inheritence from my grandmother and some money wired to my account from my parents for Christmas and stuff. Would I include any money that came into my bank account, or just that which I earned through working?
In the Document Checklist for the Sponsor (IMM 5491) it says to "provide evidence of income" (Item 19) if you received that income (dividends, pension, maternal or sickness benefits, etc.) over the twelve months before signing the sponsorship application.
Note however that this probably only applies if your specific situation requires you to meet minimum income requirements. I'm not sure but I think that this only applies if you're sponsoring members of your family who are NOT your spouse and children.
Maybe a more experienced forum member can clarify.