In the UK everyone has a tax code that tells your employer how much tax you're paying. It doesn't tell the employer why you have that number, which could be for

In the UK everyone has a tax code that tells your employer how much tax you're paying. It doesn't tell the employer why you have that number, which could be for lots of reasons - eg. over / under paid in the past, working two jobs, etc. Eg. my tax code is 1185L - essentially meaning I have a tax free allowance of £11,850 PA and have no additional income.