Offer DetailsPaytm Electricity Bill Payment Offer - Get up to Rs.25 Cashback on 1st Electricity Bill Payment. Use Promocode FIRSTPAY to be eligible for this offer. Flat 2% Cashback. (Max. 25 Cashback). Promocode is applicable for 1st-time electricity users only. Promocode can be used only once per user and once per CA number. Please make sure to apply the Promocode before clicking on 'Proceed to Pay' Cashback will be credited within 24 hours of the transaction into user's Paytm Wallet. Pay your electricity bill now!