The HM Revenue and Customs website has a tax checker which is a simple way of checking whether the tax you’ve been paying is correct. It cannot be used by everyone, so check the list of exceptions first.
HMRC tax checker: http://www.hmrc.gov.uk/calcs/stc.htm
If you want to understand more about how your taxes are calculated, select the tax you are interested in from our drop-down menu on the home page. We recommend reading the Income Tax pages and Employee pages to understand what your tax code means.
If you have received a recent tax refund or bill and are not sure whether it is correct, you may want to read our recent update.
Our helpline offers professional, free, confidential advice to people on low incomes