Things to keep in mind!

In case Surcharge feature has been enabled by your PA / PG for your account, a surcharge value is expected separately by them to process the Surcharge, in addition to Order Amount. Please reach out to Juspay Support team to get the respective PA / PG surcharge param enabled at Juspay.

• txn_amount - Total order amount including surcharge

• surcharge_amount - The additional charges to be paid by the user

• tax_amount - tax amount calculated on the surcharge amount(If the tax rate is added on dashboard)

• net_amount - Base order amount

• effective_amount - Order amount paid by the user

No. The value is not configurable. Tax amount is calculated based on Tax rate, Surcharge amount and Flat fee

Yes

Flat Fee is a constant value and does not vary with the order amount, but the surcharge amount changes with the order amount

Tax rate is the additional tax amount added on the surcharge debited from the user. The tax rate is calculated on the total surcharge value i.e. Surcharge Amount + Flat Fee

In MDR model, Juspay calculates the surcharge and sends the complete amount (order amount + Surcharge) to the gateway. Gateway calculates the MDR on the total amount that was sent to them and then settle the balance.

Example:

• Order Amount: 100

• Surcharge Amount: 1

• Total Amount sent to Gateway: 101

• MDR charged by gateway: 1%

• Balance Amount to be settled to merchant: 99.99

In Customer Fee Bearing model, the surcharge gets calculated and the breakup of order amount and surcharge is sent to the gateway along with the total amount. Since the gateway has the context of the breakup, gateway understands that the MDR is already paid by the customer and settles the order amount to the merchant.

Example:

• Order Amount: 100

• Surcharge Amount: 1

• Total Amount sent to gateway: 101

• MDR charged by gateway: 1%

• Balance to be settled to Merchant: 100