A screenshot keeps going viral on social media. It shows a ₹15,000 purchase becoming ₹17,700 after 18% GST, then adding a "UPI charge" of ₹70.80 and "GST on MDR" of ₹12.75, ending at a scary-looking ₹17,783.55 — captioned "GST on GST, Tax on GST." Another version shows a ₹20,000 UPI payment supposedly costing an extra ₹94.40.
It looks convincing. It has even been shared by people with "CA" in their bio. But it is wrong in the one way that matters most: you, the customer, do not pay any of those charges. Let us break it down in plain language.
Why the viral calculation is wrong
1. The customer never pays the MDR
On a ₹15,000 purchase, you pay ₹15,000 plus ₹2,700 GST = ₹17,700. That is it. The ₹70.80 "UPI charge" and ₹12.75 GST on it are a merchant-side cost of accepting a digital payment. The rules clearly state that merchants cannot pass this charge on to customers. So showing ₹17,783.55 as your "total payment" is simply made up.
2. "GST on GST" is a wrong label
MDR (Merchant Discount Rate) is a fee for processing a payment — it is not a tax. GST on that fee is normal GST on a service, exactly like the GST you would pay on any bank or processing charge. Nothing is being taxed twice. There is no "tax on tax."
3. The ₹20,000 example is even further off
If that ₹20,000 is a person-to-person transfer (sending money to family, a friend, or yourself), the fee is zero — at any amount. If it is a payment to a business, the ₹80 + ₹14.40 is the merchant's cost, not yours. Either way, no consumer receives a bill like that.
4. "Use salary by UPI, pay UPI charges" — false
There is no charge to individuals for using UPI. You can keep using it for all your daily expenses, free of cost, just as before.
What actually changed from 15 October 2026
The National Payments Corporation of India (NPCI) issued a circular on 15 September 2026 introducing MDR on certain UPI transactions, effective 15 October 2026. MDR is the fee