dont forget you need to cover all costs now and holidays then also cover down time.. ie time when your company would normally let you sit around making the tea waiting for work to come in .. as know youll be at home instead..
I freelance and roughly if you are on €32k a year plus holiday, bonus sick pay etc you want to be looking for about €200+ a day basically this means you will need to do about 40 weeks a year to break even, and don't forget you are now taking the risk of not having work tomorrow which you need to factor in.
Dont forget the 600-1000 accountants bill.
one piece of advice keep your head down, save for a rainy day as you can have months of them each year and look for other clients all the time.