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What Is the "MDR" Fee, and Why Do Merchants Have to Pay It?

26 June 2025

What Is the "MDR" Fee, and Why Do Merchants Have to Pay It?

MDR (Merchant Discount Rate) is the fee a merchant pays to a bank or payment provider whenever a customer pays through a service such as PromptPay QR, TrueMoney or ShopeePay — and credit cards too.

Merchants using PromptPay Dynamic QR through Qashier POS are charged an MDR of 0.3%, which is low compared with other providers and other payment methods. Credit card payments, by way of comparison, carry an MDR of 1-3% depending on the provider.

Think of the MDR as a service fee that buys a smoother payment experience, because taking payment by Dynamic QR solves a whole set of payment headaches for merchants.


How Dynamic QR helps merchants take payment

1. Payments are more secure

Merchants can be sure the money has actually landed in the system. No more worrying about transfers that never arrive, customers sending the wrong amount, fake payment slips, or a customer who never presses send at all.

2. It is easier for customers

Customers no longer have to type in the amount and send the transfer themselves — scanning the Dynamic QR locks in the amount due straight away.

3. Service is faster

Staff no longer have to stop and check the amount on a payment slip, so customers are served more quickly.

What to know about using Dynamic QR and receiving your money

Payments made through systems like Dynamic QR, and through credit cards, do not land in your account immediately the way an ordinary bank transfer does. They have to pass through several processing steps, and they depend on the Bank of Thailand's operating hours.

Merchants using Qashier POS receive their money on the next business day, known as T+1 (short for Transaction Date + 1 — that is, one business day after the transaction).

How can merchants use PromptPay Dynamic QR with Qashier POS?

1. Through the Qashier POS system

Either on a Qashier POS device — QashierX1, QashierX2, QashierXS or QashierXL Slim — or on an Android tablet.

Qashier POS is a complete, capable system for selling and running a shop. When the merchant rings up a sale, the QR appears on screen for the customer to scan and pay on the spot, and once the Dynamic QR payment goes through the system prints the receipt straight away.

การสแกนจ่ายผ่านเครื่อง Qashier POS

(*The QashierX1 terminal are now unavailable; merchants can instead choose the QashierXS and QashierX2 models.)

2. With a QashierPay Soundbox

The QashierPay Soundbox is the newest PromptPay payment device from Qashier. It could hardly be simpler: key in the amount, confirm, and the device displays a QR for the customer to scan. When the payment completes, it announces it out loud.

If you would like to use Dynamic QR at your own shop, just get in touch with our team.

Start levelling up the way you run your shop with Qashier today

If you would like Qashier to be the assistant your business needs, get in touch for more information. The Qashier team is ready to support you — with POS hardware for restaurants and retail alike, a POS system that does the heavy lifting, and support from our team seven days a week.

For more details, reach us on Line Official: @qashier.th or call 02 544 0267

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