7.
To the best of my knowledge, it seems penalty in question is subject to GST.
Please refer para 7.1.6 of the Circular No. 178/10/2022-GST dated 03.08.2023, wherein it is clarified the facility of accepting late payments with interest or late payment fee is naturally bundled with the main supply it is naturally bundled with the main supply and therefore subject to GST.
The said para is reproduced for reference:
7.1.6 If a payment constitutes a consideration for a supply, then it is taxable irrespective of by what name it is called; it must be remembered that a “consideration” cannot be considered de hors an agreement/contract between two persons wherein one person does something for another and that other pays the first in return. If the payment is merely an event in the course of the performance of the agreement and it does not represent the ‘object’, as such, of the contract then it cannot be considered ‘consideration’. For example, a contract may provide that payment by the recipient of goods or services shall be made before a certain date and failure to make payment by the due date shall attract late fee or penalty. A contract for transport of passengers may stipulate that the ticket amount shall be partly or wholly forfeited if the passenger does not show up. A contract for package tour may stipulate forfeiture of security deposit in the event of cancellation of tour by the customer. Similarly, a contract for lease of movable or immovable property may stipulate that the lessee shall not terminate the lease before a certain period and if he does so he will have to pay certain amount as early termination fee or penalty. Some banks similarly charge pre- payment penalty if the borrower wishes to repay the loan before the maturity of the loan period. Such amounts paid for acceptance of late payment, early termination of lease or for pre-payment of loan or the amounts forfeited on cancellation of service by the customer as contemplated by the contract as part of commercial terms agreed to by the parties, constitute consideration for the supply of a facility, namely, of acceptance of late payment, early termination of a lease agreement, of prepayment of loan and of making arrangements for the intended supply by the tour operator respectively. Therefore, such payments, even though they may be referred to as fine or penalty, are actually payments that amount to consideration for supply, and are subject to GST, in cases where such supply is taxable. Since these supplies are ancillary to the principal supply for which the contract is signed, they shall be eligible to be assessed as the principal supply, as discussed in detail in the later paragraphs. Naturally, such payments will not be taxable if the principal supply is exempt
it is also important to refer para 9 of the said circular.
Late payment surcharge or fee
9. The facility of accepting late payments with interest or late payment fee, fine or penalty is a facility granted by supplier naturally bundled with the main supply. It is not uncommon or unnatural for customers to sometimes miss the last date of payment of electricity, water, telecommunication services etc. Almost all service providers across the world provide the facility of accepting late payments with late fine or penalty. Even if this service is described as a service of tolerating the act of late payment, it is an ancillary supply naturally bundled and supplied in conjunction with the principal supply, and therefore should be assessed as the principal supply. Since it is ancillary to and naturally bundled with the principal supply such as of electricity, water, telecommunication, cooking gas, insurance etc. it should be assessed at the same rate as the principal supply. However, the same cannot be said of cheque dishonor fine or penalty as discussed in the preceding paragraphs.
Experts may correct me if I am wrong or I have misunderstood the query.