Niki, thank you for your reply...
I wish to know the following:
- Do I need to declare this?
you should declare this fee as income on your tax return under other taxable income.
- Would the employer declare it in anyway?
Your employer may declare it
- What tax / NIE would I have to pay?
This income would be added to your earning and other incoem in the tax year and chargeable to income tax at your marginal rate... it would appear from information provided that it would attract tax at 20%
As this is casual income (fee) .. it would not attract NI contribution provided it is not deemed part of salary. The period of 3 months could be viewed as consultancy.
- How do I go about this?
You should view the 3 month period as consultancy on self employed basis before signing a contract.
I hope this is helpful.
If you are happy and there are no more issues I will appreciate if you would kindly rate the service I provided to ensure I get credited for it.