2 min readWarningBank of England banking taxonomy 4.1.1Updated 11 November 2026

Breakdown of credit exposures relevant for the calculation of the countercyclical buffer by country and institution-specific countercyclical buffer rate (CCB): a value must not be more than another (C09.04.01.01, Bank of England check v10656_m)

A warning on the breakdown of credit exposures relevant for the calculation of the countercyclical buffer by country and institution-specific countercyclical buffer rate (CCB) template (C09.04.01.01), in the own funds (PRA001) return.

Line4 Check runs it on the own funds (PRA001) return, proven on test files, check by check: the same outcome on all three test files of that return.

The rule in plain words

In Breakdown of credit exposures relevant for the calculation of the countercyclical buffer by country and institution-specific countercyclical buffer rate (CCB) (C09.04.01.01): every value in "Countercyclical capital buffer rate set by the Designated Authority" (row 0120), "Countercyclical capital buffer rate applicable for the country of the institution" (row 0130) and "Institution-specific countercyclical capital buffer rate" (row 0140) in column "Percentage" (column 0020) must not be more than 1.

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Compare the values in your return. If the first is bigger than it may be, one of them is wrong: check both before you change either.
  3. 03It runs only when your filing indicators mark C09.04.01 as reported.
  4. 04This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Breakdown of credit exposures relevant for the calculation of the countercyclical buffer by country and institution-specific countercyclical buffer rate (CCB) (C09.04.01.01)

Rows

  • R0120Countercyclical capital buffer rate set by the Designated Authority
  • R0130Countercyclical capital buffer rate applicable for the country of the institution
  • R0140Institution-specific countercyclical capital buffer rate

Column

  • C0020Percentage

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds (PRA001) returns, as a warning.

The Bank’s own words and formula

The plain words above spell out the Bank’s formula, with each cell named from its templates. In the Bank of England’s list of validations, word for word:

[v10656_m];[{t: C09.04.01.01, r: 0120; 0130; 0140, c: 0020, All Sheets} <= 1]
Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

{t: C09.04.01.01, r: 0120; 0130; 0140, c: 0020} <= 1

Every PRA banking rule on C09.04.01.01

Checks like this one, run at the point of submission, are the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.