There are obvious benefits going ltd the main one tax breaks and probably as important is the protection from being bankrupted personally , as you are taking on bigger contracts this may me the most important benefit to you , you only need one company to go bust on you when you have laid out for mats and wages etc and it could be the end for you as a sole trader, but as a ltd company it's the company that goes into liquidation and not you that becomes bankrupt (unless it's proven that you knowingly traded whilst insolvent, then it could be jail ;D) , be careful what you list as company assets , get a good accountant and keep in touch on a regular basis, penalty's can be astronomical so be careful (up to ten grand fine and three years jail for no/late returns i think) lot's to get your head round mate but as has been mentioned you pay your self the max allowance before tax, 6k ish (£106 a week) and then a monthly/qaurtely,half yearly divi