Payslips and tax: calculating your own

In the UK, it&rsquo;s very common that your employer pays you once a month. When this happens, they give you a document called a payslip , that has some numbers on it, such as how much your salary is, how much they paid you this month, how much went to HMRC in tax, how much went to your pension, and a few other numbers. But they never show any workings, so you really have no way to check whether…