Q. Which one of the following best describes the term "Merchant Discount Rate" sometimes seen in news? (UPSC Prelims 2018)
Answer: The charge to a merchant by a bank for accepting payments from his customers through the bank's debit cards.
Notes: The correct answer is [C] The charge to a merchant by a bank for accepting payments from his customers through the bank's debit cards. The Merchant Discount Rate (MDR) is a critical component of the digital payment ecosystem in India.

• Definition: MDR is the fee that a merchant (shopkeeper/business) pays to a bank for the privilege of accepting payments from customers via credit and debit cards. It is expressed as a percentage of the total transaction value.
• Distribution: This fee is shared among three parties: the bank that issued the card (Issuing Bank), the bank that installed the PoS machine (Acquiring Bank), and the payment network provider (like Visa, Mastercard, or RuPay).
• Statement [A] (Incorrect): MDR is a cost/charge to the merchant, not an incentive given by the bank.
• Statement [B] (Incorrect): This describes a "Cashback" or reward system, not MDR.
• Statement [D] (Incorrect): While the government has occasionally subsidized MDR (notably for RuPay and UPI transactions) to promote digital India, the term itself refers to the charge, not the government incentive.

Currently, the Government of India has mandated a zero-MDR policy for transactions made through RuPay debit cards and Unified Payments Interface (UPI) to encourage digital adoption, meaning merchants are not charged for these specific payment methods.