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

Own funds for SDDTs (CA1 SDDT): this is the TIER1 Capital amount calculated by using as parameters c0010 or c0030 if it’s greater than c0010 (SC01.00.01.01, SC02.00.01.01, SC03.00.01.01, Bank of England check boe_b0024_ss)

A blocking check on the own funds for SDDTs (CA1 SDDT) (SC01.00.01.01), own funds requirements for SDDTs (CA2 SDDT) (SC02.00.01.01) and capital adequacy - capital ratios and capital levels for SDDTs (CA3 SDDT) (SC03.00.01.01) templates, in the own funds for SDDTs (PRA116) return.

Line4 Check runs it on the own funds for SDDTs (PRA116) return, proven on test files, check by check: the same outcome on all three test files of that return.

The rule in plain words

This is the TIER1 Capital amount calculated by using as parameters c0010 or c0030 if it’s greater than c0010

In Own funds for SDDTs (CA1 SDDT) (SC01.00.01.01): "Tier 1 capital" in column "Amount" (row 0015, column 0010) must equal "Total risk exposure amount" in column "All approaches" (row 0010, column 0010) in Own funds requirements for SDDTs (CA2 SDDT) (SC02.00.01.01) multiplied by "T1 Capital ratio" in column "Amount" (row 0030, column 0010) in Capital adequacy - capital ratios and capital levels for SDDTs (CA3 SDDT) (SC03.00.01.01).

This is a blocking check. A return that fails it is normally rejected, so fix it before you submit. It runs only when your filing indicators mark SC01.00.01, SC02.00.01 and SC03.00.01 as reported.

The cells it reads

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

Row

  • R0015Tier 1 capital

Column

  • C0010Amount

Own funds requirements for SDDTs (CA2 SDDT) (SC02.00.01.01)

Row

  • R0010Total risk exposure amount

Column

  • C0010All approaches

Capital adequacy - capital ratios and capital levels for SDDTs (CA3 SDDT) (SC03.00.01.01)

Row

  • R0030T1 Capital ratio

Column

  • C0010Amount

Which returns it applies to

Line4 Check runs it on the own funds for SDDTs (PRA116) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) returns, as a blocking check.

The Bank’s own words and formula

The first paragraph of the plain words above is the Bank of England’s own, word for word, from its list of validations. The second spells out its formula, with each cell named from its templates.

Show the formulaShow

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

{t: SC01.00.01.01, r: 0015, c: 0010} = {t: SC02.00.01.01, r: 0010, c: 0010} * {t: SC03.00.01.01, r: 0030, c: 0010}

Every PRA banking rule on SC01.00.01.01

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.