1) Are we supposed to pay khums on investments (if you need to know more specific s it's a UK investment ISA)? If so, on which amounts do we pay the Khums, and would this be every year?

2) And would I then pay khums on any profit generated on that amount at the end of the khums year?

by

1) If the investments are savings then yes, and it would be once. For example if I have an investment of £5000 which is saved for a whole year, I will pay £1000 on it and then that investment is khums’d and I do not need to pay on it again even if it stays for another year

2) Correct