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

Own funds (CA1): "Retained earnings" must equal the sum of "Previous years retained earnings" and "Profit or loss eligible" (C01.00.01.01, SC01.00.01.01, Bank of England check v0175_m)

A blocking check on the own funds (CA1) (C01.00.01.01) and own funds for SDDTs (CA1 SDDT) (SC01.00.01.01) templates, in the own funds (PRA001) and own funds for SDDTs (PRA116) returns.

Line4 Check runs it on the own funds (PRA001) and own funds for SDDTs (PRA116) returns, proven on test files, check by check: the same outcome on all six test files of those returns.

The rule in plain words

In column "Amount" (0010) of Own funds (CA1) (C01.00.01.01): "Retained earnings" (row 0130) must equal the sum of "Previous years retained earnings" (row 0140) and "Profit or loss eligible" (row 0150).

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 C01.00.01 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

Own funds (CA1) (C01.00.01.01)

Rows

  • R0130Retained earnings
  • R0140Previous years retained earnings
  • R0150Profit or loss eligible

Column

  • C0010Amount

Own funds for SDDTs (CA1 SDDT) (SC01.00.01.01)

Rows

  • R0130Retained earnings
  • R0140Previous years retained earnings
  • R0150Profit or loss eligible

Column

  • C0010Amount

A worked example

With simple numbers.

Illustrative values
Previous years retained earnings1,200
Profit or loss eligible800
Together2,000
What the rule then expects

Retained earnings must then be 2,000.

2,000Passes
2,100Fails

A file that reports 2,000 passes. One that reports 2,100 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) and own funds for SDDTs (PRA116) returns on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) and own funds (PRA001) 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:

v0175_m: [C01.00.01.01] {r0130, c0010} = {r0140, c0010} + {r0150, c0010}
Show the formulaShow

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

{t: C01.00.01.01, r: 0130, c: 0010} = {t: C01.00.01.01, r: 0140, c: 0010} + {t: C01.00.01.01, r: 0150, c: 0010}

Every PRA banking rule on C01.00.01.01

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.