Potential contract overlapping

Hello, my current employment contract expires on 29th February 2024. However looking at my unused annual leaves of 12 days my current employer has allowed 13th of February to be my last working day. My new employer wants me to join on 15th of February as there is an urgent event lined up and they cant wait until 1st March. I have aligned with both the employers - current and new- and both are okay with me starting my new job with contract overlapping dates however they asked me to check the taxation implications on my own as there might be two tax codes against my name between 15th to 29th of Feb. So wanted to understand what needs to be done here in this case.

You must complete the New Starter Decleration before commencing your new role - https://assets.publishing.service.gov.uk/media/6331a05f8fa8f51d29278ebc/Starter_checklist.pdf. At the point of starting the new role you will have more than one employment so you would need to tick box C. As soon as your other contract has ended, and as long as you have been paid in your new role you can call HMRC and ask them to allocate your tax code to the new employer (you will need the old and new PAYE reference for this call) 0300 200 3300 - be prepared for a wait - the employer helpline is regularly 2+ hours wait! Just be aware that it is very close to the payroll year end, and depending on the timing of your call and the payroll department cut off dates it may overlap and not reach them in time. Do ensure that as soon as you receive your P45 from the previous employment pass this over, otherwise your P60 may not include the whole year figures. Do keep your P45 copy in case this happens for tax purposes (keep it for at least 7 years to be safe)

Hi Arghya Dutta,

To avoid any overlap of allowances, your new employer should use a code of BRX. Due to the time of year, it is unlikley a new code could be issued before the end of the
tax year.

Thank you.