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

Own funds (CA1): a total must equal the sum of its parts (CP01.00.04.01, Bank of England check v0187-1_m)

A blocking check on the own funds (CA1) template (CP01.00.04.01), in the capital+ actuals and forecasts (PRA112) return.

Line4 Check runs it on the capital+ actuals and forecasts (PRA112) return, proven on test files, check by check: the same outcome on all eight test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

In column "Current reporting month" (0010) of Own funds (CA1) (CP01.00.04.01): "Capital instruments eligible as T2 Capital" (row 0760) must equal the sum of "Fully paid up, directly issued capital instruments" (row 0771), "Share premium" (row 0791), "(-) Own T2 instruments" (row 0800) and "(-) Actual or contingent obligations to purchase own T2 instruments" (row 0842).

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. 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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 CP01.00.04 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

Own funds (CA1) (CP01.00.04.01)

Rows

  • R0760Capital instruments eligible as T2 Capital
  • R0771Fully paid up, directly issued capital instruments
  • R0791Share premium
  • R0800(-) Own T2 instruments
  • R0842(-) Actual or contingent obligations to purchase own T2 instruments

Column

  • C0010Current reporting month

A worked example

With simple numbers.

Illustrative values
Fully paid up, directly issued capital instruments1,200
Share premium800
(-) Own T2 instruments450
(-) Actual or contingent obligations to purchase own T2 instruments300
Together2,750
What the rule then expects

Capital instruments eligible as T2 Capital must then be 2,750.

2,750Passes
2,850Fails

A file that reports 2,750 passes. One that reports 2,850 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 capital+ actuals and forecasts (PRA112) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to 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:

[v0187-1_m];[{t: CP01.00.04.01, r: 0760, c: 0010} = {t: CP01.00.04.01, r: 0771, c: 0010} + {t: CP01.00.04.01, r: 0791, c: 0010} + {t: CP01.00.04.01, r: 0800, c: 0010} + {t: CP01.00.04.01, r: 0842, c: 0010}]
Show the formulaShow

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

{t: CP01.00.04.01, r: 0760, c: 0010} = {t: CP01.00.04.01, r: 0771, c: 0010} + {t: CP01.00.04.01, r: 0791, c: 0010} + {t: CP01.00.04.01, r: 0800, c: 0010} + {t: CP01.00.04.01, r: 0842, c: 0010}

Every PRA banking rule on CP01.00.04.01

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.