ISO 20022 · Balance sub 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, eg, 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

Balance sub type contains 22 registered codes. Its exact identifier is ExternalBalanceSubType1Code.

Specifies the balance sub-type, as published in an external balance sub-type code list. 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 32 published message references

This code in other sets 3

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