A notice of coding shows your tax code if you are going to pay through the PAYE system. The notice is usually sent out in January or February for the tax year beginning on the following 6 April.
The code shown in the notice is given for that tax year only. The notes that come with the notice of coding explain how the code is worked out. Not everyone gets a notice of coding each year, it depends on what allowances and reliefs you are claiming and whether these tend to change from year to year.
If the only changes are the increase of allowances in the Budget or any change in the tax rates, your umbrella will include these automatically in your wages or pension and you won’t get a notice of coding.