interest paid on personal loan

Yes, if utilized it for business purpose or for generating any professional income.....

But no........ if utilized it for personal use..........

Like others have said it depends on the kind of loan you get.

If it's a personal loan like this one then no: https://nzcubaywide.co.nz/get-a-loan/personal-loans/

If it's a business loan like this one, then yeah: https://www.nationalfunding.com/small-business-loans/

It also depends exactly what you use the money for, and the specifics of the tax laws that apply to your business. Might be worth checking with a professional to make sure you're claiming everything you can.