Interest is payable on fifty lac because unless the liability is adjusted against the set off in the electronic credit ledger the liable is considered to be unpaid. Obviously there is scope to argue that having ITC balance in the ledger and not allowed to consider for the purpose of arriving at payment of interest on delayed payment. Therefore, in the GST council meeting held on 22nd December, it is recommended that available ITC shall be considered incase of payment is delayed and interest is triggered. However , the notification giving effect to the recommendation is yet to be published.