Is GST payable on a proforma invoice?
No. GST becomes payable when the tax invoice is issued or, for services, when an advance is received. A proforma invoice is only an offer.
Is GST payable on an advance received against a proforma?
For goods, no: GST on advances for goods was removed in November 2017. For services, yes: issue a receipt voucher and pay GST on the advance.
Can the buyer claim input tax credit on a proforma invoice?
No. Credit needs a tax invoice or debit note.
Why do banks ask for a proforma invoice?
To release payment for imports or open a letter of credit, banks need a document from the supplier showing price and terms. Buyers also use them for loan and licence applications.