F54 - ADDITIONAL AMOUNTS: This is the additional amount field used in transactions. It can take different values depending on the transaction.
For example, in financial transactions, the account balance information is sent in this field for balance inquiry transactions.
Sending the F54 value in 110 and 210 messages is optional. If sent, it may be printed on the transaction receipt by the acquirer to make it easier for the cardholder to use.
Account balance information on the receipt and terminal screen is displayed in the cardholder's currency.
It is a 120-character-long, alphanumeric, LLLVAR format field.
(Can be used in 20-character blocks)
It consists of the following components:
| Position | Usage | Length |
| 1–2 | Account Type ( 10 = savings account, 20 = checking account, 30 = credit card account) | 2 |
| 3–4 | Amount Type (01 = Ledger Balance, 02 = Available Balance, 40 = Cash-back, 90 = Available Credit, 91 = Credit Limit) | 2 |
| 5–7 | Currency Code | 3 |
| 8 | Debit or Credit indicator (C = credit amount or positive balance, D = debit amount or negative balance) | 1 |
| 9–20 | Amount—12 digits, zero-padded on the right. | 12 |
