2 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Non-life technical provisions: a total must equal the sum of its parts (IR.17.01, Bank of England rule IR_bv0820)

A blocking check on the non-life technical provisions template (IR.17.01), in the annual solo (ARS) and annual third-country branch (ARB) returns.

The rule in plain words

The item "Provision for claims outstanding - Gross - Total" reported in Non-Life Technical Provisions (IR.17.01.01.01) should be equal to the sum of "Provision for claims outstanding - Gross - direct business", "Provision for claims outstanding - Gross - accepted proportional reinsurance business" and "Provision for claims outstanding - Gross - accepted non-proportional reinsurance business"

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 IR.17.01 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

Non-life technical provisions (IR.17.01.01.01)

Rows

  • R0160Gross - Total
  • R0170Gross - direct business
  • R0180Gross - accepted proportional reinsurance business
  • R0190Gross - accepted non-proportional reinsurance business

Column

  • C0180Total Non-Life obligation

A worked example

With simple numbers.

Illustrative values
Gross - direct business1,200
Gross - accepted proportional reinsurance business800
Gross - accepted non-proportional reinsurance business450
Together2,450
What the rule then expects

Gross - Total must then be 2,450.

2,450Passes
2,550Fails

A file that reports 2,450 passes. One that reports 2,550 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 annual solo (ARS) and annual third-country branch (ARB) returns on Bank of England taxonomy 2.2.0. The Bank of England applies it to annual third-country branch (ARB) and annual solo (ARS) returns, as a blocking check.

The Bank’s own words and formula

In the Bank of England’s list of validations, word for word:

The item "Provision for claims outstanding - Gross - Total" reported in IR.17.01.01.01 - Non-Life Technical Provisions should be equal to the sum of "Provision for claims outstanding - Gross - direct business", "Provision for claims outstanding - Gross - accepted proportional reinsurance business" and "Provision for claims outstanding - Gross - accepted non-proportional reinsurance business".
Show the formulaShow

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

{t: IR.17.01.01.01, r: R0160, c: C0180} = {t: IR.17.01.01.01, r: R0170, c: C0180} + {t: IR.17.01.01.01, r: R0180, c: C0180} + {t: IR.17.01.01.01, r: R0190, c: C0180}

Every Solvency UK rule on IR.17.01

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.