Bigbasket Big Save: 20% Cashback. Offer valid from 1/02/2018 – 5/02/2018.Offer valid on a minimum transaction amount of Rs.1500/- Offer valid on Citibank Credit Cards and Debit Cards. Offer is not applicable for Corporate Credit Cards. The offer is applicable for a maximum cashback of Rs.500/month. Cashback will be credited within 90 days from the date of the transaction. Valid only on online payments with Valid Citibank Credit & Debit cards.