Tax Code

I am currently a non tax resident but I will return to take up employment in the UK from 1 November 2024. My annual salary from new UK job will be 120k but since I will be joining the company on 1 November only 50k of my annual salary will fall in tax year 24/25 which means I should receive full Personal Allowance of 12.75k. However if my UK employer uses my current tax code it will be based on my annual salary giving me reduced PA? Should I ask HMRC to issue a different tax code for the 5 months of this tax year and then revert to normal tax code from 6 April 25?

Hi,
The pesonal allowance is based on your income received in the tax tax year rather than what your yearly salary will be.
As the tax year runs from Apr 24 - Mar 25 and as you have said your income Nov 24-Mar 25 will be 50k you will be entitled to the full PA of 12570 with the remaining
being taxed at 20% till after Apr25.
After April 25 ou will need to make sure the code is correct based on your income of 120K
See Income Tax rates and Personal Allowances
Thank you.