Yes khums is applicable.
Sayed, I need to ask a quick question, and I trust ur answer above many others. If I have a chunk of money that I want to use to gain interest from a non-muslim bank. The more I have in there the more interest I get. This account is a “high-interest savings account” which cannot be used for everyday banking or expenditure. It’s exclusive to gaining interest. If I were to use that money exclusively for this sort of gains, as another source of income, do I still need to pay khums on it? Considering the khumsed money taken out will directly effect how much interest I gain. Please let me know your thoughts.