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

Own funds (CA1): every value in 28 rows in column "Amount" must be zero or more (C01.00.01.01, Bank of England check v3684_s)

A blocking check on the own funds (CA1) template (C01.00.01.01), 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.

Check your file for this ruleWhat to do if it fails

The rule in plain words

In Own funds (CA1) (C01.00.01.01): every value in 28 rows (listed below) in column "Amount" (column 0010) must be zero or more.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Look for a value below zero in these cells, such as an amount entered as a negative number.
  3. 03It runs only when your filing indicators mark C01.00.01 as reported.
  4. 04This 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

  • R0040Fully paid up capital instruments
  • R0045Of which: Capital instruments subscribed by public authorities in emergency situations
  • R0050Memorandum item: Capital instruments not eligible
  • R0060Share premium
  • R0210Funds for general banking risk
  • R0220Transitional adjustments due to grandfathered CET1 Capital instruments
  • R0330Deferred tax liabilities associated to goodwill
  • R0335Accounting revaluation of subsidiaries' goodwill derived from the consolidation of subsidiaries attributable to third persons
  • R0360Deferred tax liabilities associated to other intangible assets
  • R0365Accounting revaluation of subsidiaries' other intangible assets derived from the consolidation of subsidiaries attributable to third persons
  • R0410Deferred tax liabilities associated to defined benefit pension fund assets
  • R0420Defined benefit pension fund assets which the institution has an unrestricted ability to use
  • R0530Additional tier 1 capital
  • R0551Fully paid up, directly issued capital instruments
  • R0560Memorandum item: Capital instruments not eligible
  • R0571Share premium
  • R0660Transitional adjustments due to grandfathered AT1 Capital instruments
  • R0670Instruments issued by subsidiaries that are given recognition in AT1 Capital
  • R0740Excess of deduction from AT1 items over AT1 Capital (deducted in CET1)
  • R0750Tier 2 capital
  • R0771Fully paid up, directly issued capital instruments
  • R0780Memorandum item: Capital instruments not eligible
  • R0791Share premium
  • R0880Transitional adjustments due to grandfathered T2 Capital instruments
  • R0890Instruments issued by subsidiaries that are given recognition in T2 Capital
  • R0910IRB Excess of provisions over expected losses eligible
  • R0920SA General credit risk adjustments
  • R0970Excess of deduction from T2 items over T2 Capital (deducted in AT1)

Column

  • C0010Amount

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 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:

[v3684_s];[{t: C01.00.01.01, r: 0040; 0045; 0050; 0060; 0210; 0220; 0330; 0335; 0360; 0365; 0410; 0420; 0530; 0551; 0560; 0571; 0660; 0670; 0740; 0750; 0771; 0780; 0791; 0880; 0890; 0910; 0920; 0970, c: 0010} >= 0]
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: 0040; 0045; 0050; 0060; 0210; 0220; 0330; 0335; 0360; 0365; 0410; 0420; 0530; 0551; 0560; 0571; 0660; 0670; 0740; 0750; 0771; 0780; 0791; 0880; 0890; 0910; 0920; 0970, c: 0010} >= 0

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.