ISO 20022 · System balance type

BLCKBlocked

Registered in sourceSource release: August 2026 (v3)

Published definition

Balance representing the regulatory reserve that a financial institution must have with the account servicing institution, such as the minimum credit balance a financial institution is to keep with its Central Bank for mandatory reserve purposes. In some countries, a blocked balance is known as a 'reserve' balance.

Code set and usage

System balance type contains 70 registered codes. Its exact identifier is ExternalSystemBalanceType1Code.

Specifies the system balance type, as published in an external system balance type code set. External code sets can be downloaded from www.iso20022.org.

Use the code with the applicable message version and implementation guide. A matching code value alone does not establish the same meaning in another set.

View 7 published message references

This code in other sets 3

These share the characters BLCK. Their meanings belong to their respective sets.