GST on Interest received / Paid if payment made/received after due date

Sir / Madam,

Whether a merchant made payment towards purchase of goods or received payment towards sale of goods in course of business, raised debit note/ credit note towards interest for payment made/received after due date is subject to GST. If yes, then what would be rate of GST?

Almost, there is no GST applicability on interest for payment made to or received after due days on debit /credit note(s).

Pls. clarify it.