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

Capital adequacy - memorandum items (CA4): a total must equal the sum of its parts (C04.00.01.01, CP04.00.04.01, Bank of England check v0226_m)

A blocking check on the capital adequacy - memorandum items (CA4) (C04.00.01.01) and memorandum Items (CA4) (CP04.00.04.01) templates, in the own funds (PRA001) and capital+ actuals and forecasts (PRA112) returns.

Line4 Check runs it on the own funds (PRA001) and capital+ actuals and forecasts (PRA112) returns, proven on test files, check by check: the same outcome on all eleven test files of those returns.

The rule in plain words

In column "Amount" (0010) of Capital adequacy - memorandum items (CA4) (C04.00.01.01): "Total credit risk adjustments, additional value adjustments and other own funds reductions eligible for inclusion in the calculation of the expected loss amount" (row 0110) must equal the sum of "General credit risk adjustments" (row 0120), "Specific credit risk adjustments" (row 0130) and "Additional value adjustments and other own funds reductions" (row 0131).

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 tables below and find the cells the rule reads.
  2. 02Add up the parts in your return and compare the result with the total.
  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.
  4. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark C04.00.01 as reported.
  6. 06This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Capital adequacy - memorandum items (CA4) (C04.00.01.01)

Rows

  • R0110Total credit risk adjustments, additional value adjustments and other own funds reductions eligible for inclusion in the calculation of the expected loss amount
  • R0120General credit risk adjustments
  • R0130Specific credit risk adjustments
  • R0131Additional value adjustments and other own funds reductions

Column

  • C0010Amount

Memorandum Items (CA4) (CP04.00.04.01)

Rows

  • R0110Total credit risk adjustments, additional value adjustments and other own funds reductions eligible for inclusion in the calculation of the expected loss amount
  • R0120General credit risk adjustments
  • R0130Specific credit risk adjustments
  • R0131Additional value adjustments and other own funds reductions

Column

  • C0010Current reporting month

A worked example

With simple numbers.

Illustrative values
General credit risk adjustments1,200
Specific credit risk adjustments800
Additional value adjustments and other own funds reductions450
Together2,450
What the rule then expects

Total credit risk adjustments, additional value adjustments and other own funds reductions eligible for inclusion in the calculation of the expected loss amount must then be 2,450.

2,450Passes
2,550Fails

A file that reports 2,450 passes. One that reports 2,550 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) and capital+ actuals and forecasts (PRA112) returns on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds (PRA001) and capital+ actuals and forecasts (PRA112) returns, as a blocking check.

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:

v0226_m: [C04.00.01.01] {r0110, c0010} = {r0120, c0010} + {r0130, c0010} + {r0131, c0010}
Show the formulaShow

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

{t: C04.00.01.01, r: 0110, c: 0010} = {t: C04.00.01.01, r: 0120, c: 0010} + {t: C04.00.01.01, r: 0130, c: 0010} + {t: C04.00.01.01, r: 0131, c: 0010}

Every PRA banking rule on C04.00.01.01

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.