Banks will be looking at your net profit, ie your taxable earnings.

This is the figure they will use for affordability calculations and income multiples.

There are other aspects that will affect a self employed mortgage applicants success. Many lenders require a minimum of 2 years trading and some will want to see 2 years accounts.

If you don't have these, don't worry, they may well still be options out there for you, and I suggest you speak to an independent Mortgage broker and discuss your circumstances with them, as they will be able to advise on the best way forward.