What is the Merchant Discount Rate (MDR)? Charges and Calculations

13 Min

March 20, 2025

Introduction 

In the current digital era, wherein businesses mainly rely on electronic payments, many merchants overlook the major cost of digital payment—an MDR (Merchant Discount Rate). As a business owner, you should know MDR fees and their impact on turnover. This manual addresses everything about the merchant discount rate (MDR), including working with MDR charges and providing a convenient way to calculate the merchant discount rate most efficiently. The factors that will also be considered in this paper are how merchants can lower their MDR costs and how various payment processing fees for businesses can be compared. 

What is the Merchant Discount Rate (MDR)?

 The Merchant Discount Rate (MDR) is the fee banks and payment service providers charge merchants and merchants for handling electronic transactions. Whenever a customer pays using a credit or debit card in a transaction, an MDR fee is levied on the transaction value, which is then credited as payment to the merchant after the fee deduction. MDR is an immeasurable part of the merchant processing fees businesses must pay to accept card payments. The fee also goes towards other things like the operation of transactions, fraud protection, and network maintenance. 

How MDR Charges Operate 

MDR charges vary on different grounds, such as the card type utilized, the merchant category and the payment processor. This is a clear and easy definition of how MDR charges work on debit and credit cards: 

  1. Customer Uses Card: The buyer pays the required amount through a debit, credit card, or online wallet. 
  2. The Payment Gateway processes payment: The payment gateway operates the transaction through the banking network. 
  3. MDR Fee is Charged: The acquiring bank (the merchant's bank) charges transaction fees, after that, the fees are distributed among the banks, card networks (Visa, Mastercard, etc.), and payment service providers. 
  4. Merchant is Paid: The amount after subtracting the Merchant Discount Rate is credited to the merchant. 

MDR Calculation Guide: Calculating Merchant Discount Rate 

The calculation formula for Merchant Discount Rate (MDR) is: 

MDR = (Transaction Amount × MDR %) + Fixed Fee (if any) 

For example, if the MDR is 2% on a ₹1,000 transaction: 

MDR Fee = ₹1,000 × 2% = ₹20 

If the payment processor also stipulates a fixed charge of ₹3 per transaction, then the total MDR charges would be: 

Total MDR Charges = ₹20 + ₹3 = ₹23 Consequently, the merchant does not receive total of ₹1,000; 

Instead, he gets only ₹977 (₹1,000 - ₹23). 

“High MDRs can eat into merchant profits, especially in international sales. That’s why TransFi optimizes for low-cost rails without compromising on compliance or speed—empowering businesses to scale across borders without worrying about fee overload.” - Rahul Sahni, COO & CPO TransFi

MDR vs. Interchange Fees: Key Differences 

Many entrepreneurs have a mix-up with MDR and interchange fees. Even though both of them are costs related to the transaction, they stand for different purposes: 

  1. Interchange Fee: It is a charge by the acquiring bank (merchant bank) to the issuing bank (customer bank) for processing card transactions. 
  2. MDR: The merchants must pay the complete charges for processing transactions, including interchange fees, payment processor fees, and card network fees. 

How MDR Impacts Small Businesses 

For small businesses, high MDR fees may prompt a sharp drop in profits, particularly companies with a low volume of transactions. This indicates that the selection of a proper payment processor is crucial. For instance, transfi has some of the most attractive MDR rates in the market, which companies primarily use to reduce transaction costs and enhance their cash flow. 

Minimizing MDR Expenses for Merchants 

Below are some tips on how companies can make MDR costs cheaper: 

  1. Use Low-MDR Payment Processors: You can choose transfi, a consistent low-MDR payment processing service provider, to lessen your processing costs. 
  2. Barter MDR with Banks: Big companies with large volumes of transactions can ask for lower MDR rates from banks and payment providers. 
  3. Provide UPI and Net Banking Payments: Payments through UPI and net banking often involve less charge than charge than card payments. 
  4. Pass MDR Charges to Customers: Certain businesses may absorb MDR charges by adding a small convenience fee to the customers. 
  5. Opt for Transparent Pricing Payment Providers: transfi and similar companies have transparent frameworks concerning MDR with no hidden charges. 

How MDR Impacts E-commerce and Retail Businesses

MDR can be a considerable expense in both the retail and e-commerce sectors. Here is the impact that MDR has on them: 

  1. Profit Margins: Elevated MDR leads to reduced net transaction profits. 
  2. Customer Experience: Some businesses require customers to pay an extra charge for MDR, often resulting in customer dissatisfaction. 
  3. Competitive Pricing: Companies with low MDR can offer customers lower prices. 
Also Read: How to Receive International Bank Transfers Online

FAQs on Merchant Discount Rate (MDR) 

  1. What is the primary distinction between Merchant Discount Rate (MDR) and payment gateway fees? 
  • MDR deals with a vast range of fees, such as interchange fees, card network fees, and payment processor fees, while payment gateway fees are fees the payment processors charge for transaction processing.
  1.  Can businesses haggle over MDR rates with banks? 
  • The big companies that deal with a huge number of transactions can successfully negotiate mutually agreed discounts for MDR rates with banks and payment providers.
  1. Is MDR valid for UPI transactions? 
  • UPI transactions are generally free, or if they require the payment of fees, they are usually less than those of the transaction cards; thus, the merchant has a low-cost choice.
  1. Which is the most inexpensive MDR payment gateway in India? 
  • Transfi is one of the best in terms of MDR fees and clear pricing to businesses with low MDR fees.
  1. How can small businesses reduce MDR fees to the minimum? 
  • Small businesses can reduce MDR by incorporating low-cost payment service providers, which promote UPI payments and help them negotiate bank rates. 

Conclusion 

Companies that enable their clients to make online payments must get FIMM (Federal Information Maintenance Management) to provide MDRs such as Your Express (YourExpressCard.com) payments. Merchant Discount Rate (MDR) describes the ATL a merchant pays to a bank or payment network for processing payments. With the right MDR calculation method, businesses can make the right decisions and manage the MDR charges efficiently. Consequently, with the help of affordable providers, such as transfi, companies can smooth the money flow process and increase their profits to the maximum.

TransFi Team

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