4.2 Additional Amount Field

The additional amount field (Additional_Amt_DE54) contains additional amount information for the transaction, if relevant. For example, for purchase with cashback transactions, the additional amounts field is present with the cashback amount. In practice, in request messages, you probably only want to read this field for cashback transactions to extract the cashback amount should you need it. (See also Get Transaction Message fields: Additional_Amt_DE54)

Mastercard and Visa may add new Account Type and Amount Type codes at any time. Ignore any amounts where you do not understand the amount type or account type. These are not errors.

4.2.1 Additional Amount Subfields

The Additional amounts field (Additional_Amt_DE54) can contain between 1 and 6 different amounts. Each individual amount is a 20 character block. There can be between 1 and 6 blocks. Each block is formatted as follows:

Subfield	Name	Format	Description / Valid Values
1	Account Type	2 digits 00-99	Describes which account this amount refers to. See Account Type Codes for valid values.
2	Amount Type	2 digits 00-99	Describes what this amount means. See Amount Type Codes for valid values.
3	Currency Code	3 digits 000-999	ISO 3-digit numeric currency code. See Currency Code for valid values.
4	Amount sign	‘D’ or ‘C’	C = Positive (credit) amount D = Debit (negative) amount
5	Amount value	12 decimal digits	The amount in minor units of the currency in subfield 3 (currency code.)

4.2.2 Amount Type Codes

Amount Type provides a description of this amount.

Amount Type	Description
01	Debit accounts: Ledger Balance Credit card accounts: credit amount remaining for customer (the open to buy amount)
02	Debit accounts: Available Balance Credit Card accounts: customer’s credit limit
03	Amount Owing
04	Amount Due
10	Healthcare eligibility amount. Allows the acquirer to indicate the portion of the amount spent on eligible healthcare products/services (USA only).
11	Prescription eligibility amount. Allows the acquirer to indicate the portion of the amount spent on eligible prescriptions (USA only).
12	Vision Rx eligibility amount. Allows the acquirer to indicate the portion of the amount spent on eligible vision Rx or vision products/services (USA only).
17	Mastercard prepaid online bill pay transaction fee amount
40	Cashback amount
42	Surcharge amount
44	Gratuity amount
56	Member provided fee
57	Original amount
58	Point of Interaction amount (e.g. before Dynamic Currency Conversion at the terminal)
59	Limit/Balance available amount from Mastercard In-Control