Sorry, but another Child Benefit tax question

I've just received a payrise which will take me over the 50k limit, I plan on raising my pension contributions but just want to check how BIK is added. I have Bupa cover through work which has an annual subscription figure of £812.31. Is it just a matter of adding this to my salary including car allowance? If so, my total is £55322, so should I just pay 10% into pension? Thanks