Your payslip must show:
your earnings before and after any deductions
the amount of any deductions that may change each time you’re paid, for example tax and National Insurance
the number of hours you worked, if your pay varies depending on time worked
Employers must also explain any deductions fixed in amount, for example repayment of a season ticket loan. They can choose to do this either on a payslip, or in a separate written statement.
This separate statement must be sent out before the first payslip. Employers must update this every year.
Read more about deductions that can be taken from your pay.