I did contracting through an umbrella company too. I found I had to pay Employers NI along with Employees NI as I was classed as self employed. In terms of Tax it's about the same as any other job and same as me I only lived a 10 min drive from work so was unable to claim expenses apart from mileage. I'm sure they will give you something for your travel if not any money towards your meals. To be honest I found contracting a lot of fun and laid back but I would definitely ask for a higher rate of pay if you think after tax and NI you won't be looking forward to much. Try and ring your umbrella company and ask them how much would go in deductions from your salary and that should give you a good idea. Which umbrella company were you with? I was with Plan IT, hope you not with them they were useless.