calculating tax and national insurance to aid budgeting

homersimpson_3

a friend of mine who works in a very stressful job is thinking of asking his employers to work at a lower grade but wants to know effect on disposable income before doing so.
where can i find a calculator which will show how much pay he will receive after tax and national insurance. can you provide link?
thanks

Pennywise

This same question came up in another section a few weeks ago. Try this link to one of many online payslip calculators:-

http://www.wellwoodhoyle.com/ard/calculators/payslip.asp?AID=326&SID=11&FID=5380

lkoky

try this

http://www.listentotaxman.com/