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

"Total" must equal the sum of "Credit", "Interest rate", "Commodity", "Equity", "Foreign exchange" and "Other" (C34.05.01.01, Bank of England check v10290_h)

A warning on the counterparty credit risk: CCR exposures treated with the internal model method (IMM) (CCR 5) template (C34.05.01.01), 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 each of 8 columns (listed below) of Counterparty credit risk: CCR exposures treated with the internal model method (IMM) (CCR 5) (C34.05.01.01): "Total" (row 0180) must equal the sum of "Credit" (row 0140), "Interest rate" (row 0120), "Commodity" (row 0160), "Equity" (row 0150), "Foreign exchange" (row 0130) and "Other" (row 0170).

What to do if your return fails it

  1. 01Open the table 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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 C34.05.01 as reported.
  6. 06This 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

Counterparty credit risk: CCR exposures treated with the internal model method (IMM) (CCR 5) (C34.05.01.01)

Rows

  • R0120Interest rate
  • R0130Foreign exchange
  • R0140Credit
  • R0150Equity
  • R0160Commodity
  • R0170Other
  • R0180Total

Columns

  • C0010Number of transactions
  • C0020Notional amounts
  • C0030Current market value (CMV), positive
  • C0040Current market value (CMV), negative
  • C0090Number of transactions
  • C0100Notional amounts
  • C0110Current market value (CMV), positive
  • C0120Current market value (CMV), negative

A worked example

With simple numbers.

Illustrative values
Credit1,200
Interest rate800
Commodity450
Equity300
Foreign exchange150
Other100
Together3,000
What the rule then expects

Total must then be 3,000.

3,000Passes
3,100Fails

A file that reports 3,000 passes. One that reports 3,100 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) 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:

v10290_h: [C34.05.01.01 (c0010;0020;0030;0040;0090;0100;0110;0120)] {r0180} = +{r0140} + {r0120} + {r0160} + {r0150} + {r0130} + {r0170}
Show the formulaShow

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

{t: C34.05.01.01, r: 0180} = {t: C34.05.01.01, r: 0140} + {t: C34.05.01.01, r: 0120} + {t: C34.05.01.01, r: 0160} + {t: C34.05.01.01, r: 0150} + {t: C34.05.01.01, r: 0130} + {t: C34.05.01.01, r: 0170}

Where it applies, in the Bank's words (its scope):

scope({t: C34.05.01.01, c:0010;0020;0030;0040;0090;0100;0110;0120, f: banking, fv: banking_reporting})

Every PRA banking rule on C34.05.01.01

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.