Updating your tax code. You may be put on an emergency tax code if you change jobs. HM Revenue and Customs ( HMRC) will correct it automatically after you’ve given your employer details of your previous income or pension. Tax codes with ‘K’ at the beginning mean you have income that is not being taxed another way and it’s worth more than your tax -free allowance.
Tax Code Your Tax Code tells your employer how much tax to take off your pay. What if your code is wrong ?

In the past years, in employed taxpayers have been overcharged tax because their employer has received the wrong code from HMRC! Tax is deducted each pay day from your pay before you receive it and by the end of the tax year, you should have paid the right amount of tax. Sometimes there are mistakes and you may pay too much or too little tax. PAYE is only a method of collecting tax.
If there are any errors and the wrong amount of tax is collecte you,. Understanding all the codes on your payslip. If you’re on an emergency tax code your payslip will show: These mean you’ll pay tax on all your income above the basic Personal Allowance.
