ISO 8583 field 9 settlement conversion rate

DE 9—CONVERSION RATE, SETTLEMENT: the settlement conversion rate.

It is an 8-digit numeric value. The first byte shows the position of the decimal point from the right, and the next 7 bytes show the value.

For example, the value 71121834 is interpreted as 0.1121834.

In which transactions is it used?

F9 is used when the transaction currency is different from the settlement currency. For example, a transaction made abroad in the local currency may be settled between banks by the card scheme in a different settlement currency, such as US dollars or euros. In this case, the transaction amount (F4) is in the local currency, while the settlement amount is carried in field F5 (Settlement Amount) in the settlement currency.

Formula

F5 = F4 × F9

The amount in the settlement currency is found by multiplying the transaction amount by the rate in F9.

How the rate is represented

As seen in the example above, the first digit of field F9 shows how many of the remaining 7 digits are decimal places. For example, the value 61234567 is read as 1.234567 because the first digit is 6. This way, exchange rates of different magnitudes can be expressed precisely in a fixed 8-digit field.

Related fields

  • F4 (Transaction Amount) and F49 (Transaction Currency Code): the amount and currency in which the transaction was made
  • F5 (Settlement Amount) and F50 (Settlement Currency Code): the settlement amount and currency
  • F16 (Conversion Date): the date the exchange rate belongs to

In domestic transactions made in Turkish lira, F9 is usually not used because the transaction and settlement currencies are the same.