Line4

2 min read · Bank of England taxonomy 2.2.0 · Updated 11 November 2026

Every Solvency UK validation rule, in plain words

Every one of the Bank of England's validation rules Line4 Check runs on its insurance taxonomy 2.2.0, in plain words: 2,292 validation IDs for the quarterly solo, quarterly group, annual solo, annual group and annual third-country branch returns (QRS, QRG, ARS, ARG and ARB). Search for the code in your rejection message, read what the rule means and what to do, then check your return in your browser.

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1,515 of the 2,292 rules are blocking: a return that fails one is normally rejected. The other 777 are warnings: they do not stop a return, but your supervisor may ask about them.

Content of the submission (IR.01.01) · 190 rules, 174 blocking
Basic information - general (IR.01.02) · 78 rules, 34 blocking
Basic information - RFF and matching adjustment portfolios (IR.01.03) · 6 rules, 2 blocking
Balance sheet (IR.02.01) · 151 rules, 132 blocking
Assets and liabilities by currency (IR.02.02) · 4 rules, 4 blocking
Off-balance sheet items - general (IR.03.01) · 12 rules, 10 blocking
Premiums, claims and expenses by country (IR.05.02) · 27 rules, 21 blocking
Life income and expenditure (IR.05.03) · 23 rules, 20 blocking
Non-life income and expenditure (IR.05.04) · 317 rules, 203 blocking
Life premiums and claims by country (IR.05.05) · 3 rules, 3 blocking
Business model analysis - financial guarantee insurers (IR.05.07) · 5 rules, 4 blocking
Assessable mutuals (IR.05.09) · 2 rules, 1 blocking
Excess capital generation (IR.05.10) · 19 rules, 12 blocking
List of assets (IR.06.02) · 108 rules, 68 blocking
Collective investment undertakings - look-through approach (IR.06.03) · 4 rules, 3 blocking
Open derivatives (IR.08.01) · 61 rules, 31 blocking
Assets held as collateral (IR.11.01) · 4 rules, 2 blocking
Life technical provisions (IR.12.01) · 15 rules, 14 blocking
Life best estimate liabilities by country (IR.12.03) · 2 rules, 2 blocking
Best estimate assumptions for life insurance risks (IR.12.04) · 359 rules
With-profits value of bonus (IR.12.05) · 14 rules, 10 blocking
With-profits liabilities and assets (IR.12.06) · 5 rules, 4 blocking
Life obligations analysis (IR.14.01) · 5 rules, 4 blocking
Non-life annuities information (IR.16.01) · 4 rules, 4 blocking
Non-life technical provisions (IR.17.01) · 78 rules, 61 blocking
Non-life projection of future cash flows (IR.18.01) · 1 rule
Non-life liability projection of future cash flows (IR.18.02) · 1 rule, 1 blocking
Non-life claim development (IR.19.01) · 128 rules, 84 blocking
Non-life general liability claim development (IR.19.02) · 1 rule, 1 blocking
Development of the distribution of claims incurred (IR.20.01) · 2 rules, 2 blocking
Cyber underwriting risk (IR.21.04) · 10 rules, 2 blocking
Impact of long term guarantees measures and transitionals (IR.22.01) · 22 rules, 20 blocking
Information on the transitional on interest rates calculation (IR.22.04) · 3 rules, 3 blocking
Best estimate subject to volatility adjustment by currency (IR.22.07) · 1 rule, 1 blocking
Own funds (IR.23.01) · 98 rules, 85 blocking
Detailed information by tiers on own funds (IR.23.02) · 14 rules, 14 blocking
Annual movements on own funds (IR.23.03) · 2 rules
Society of Lloyd's own funds and capital requirements (IR.23.05) · 13 rules, 10 blocking
Solvency capital requirement (IR.25.04) · 37 rules, 37 blocking
Solvency capital requirement - counterparty default risk (IR.26.02) · 1 rule, 1 blocking
Solvency capital requirement - health underwriting risk (IR.26.04) · 3 rules, 3 blocking
Solvency capital requirement - non-life underwriting risk (IR.26.05) · 15 rules, 14 blocking
Solvency capital requirement - operational risk (IR.26.06) · 4 rules, 4 blocking
Solvency capital requirement - non-life and health catastrophe risk (IR.27.01) · 47 rules, 47 blocking
Minimum capital requirement - only life or only non-life activity (IR.28.01) · 8 rules, 7 blocking
Minimum capital requirement - both life and non-life activity (IR.28.02) · 7 rules, 7 blocking
Non-life outwards reinsurance contract information (IR.30.03) · 37 rules, 35 blocking
Non-life outwards reinsurance contract reinsurer exposures (IR.30.04) · 12 rules, 12 blocking
Reinsurer and collateral provider entity information (IR.30.05) · 7 rules, 7 blocking
Life outwards reinsurance summary (IR.30.06) · 14 rules, 1 blocking
Outwards reinsurance balance sheet exposures (IR.31.01) · 24 rules, 24 blocking
Undertakings in the scope of the group (IR.32.01) · 3 rules, 1 blocking
Insurance and reinsurance individual requirements (IR.33.01) · 2 rules, 2 blocking
IGT - equity-type transactions, debt and asset transfer (IR.36.01) · 2 rules, 2 blocking
IGT - derivatives (IR.36.02) · 6 rules, 6 blocking
Content of the submission (IRR.01.01) · 137 rules, 132 blocking
Balance sheet (IRR.02.01) · 20 rules, 20 blocking
Life income and expenditure (IRR.05.03) · 10 rules, 10 blocking
Life technical provisions (IRR.12.01) · 4 rules, 4 blocking
With-profits value of bonus (IRR.12.05) · 15 rules, 10 blocking
With-profits liabilities and assets (IRR.12.06) · 6 rules, 4 blocking
Solvency capital requirement (IRR.25.04) · 16 rules, 16 blocking
Solvency capital requirement - partial or full internal model components (IRR.25.05) · 1 rule, 1 blocking
Solvency capital requirement - counterparty default risk (IRR.26.02) · 3 rules, 3 blocking
Solvency capital requirement - life underwriting risk (IRR.26.03) · 3 rules, 3 blocking
Solvency capital requirement - health underwriting risk (IRR.26.04) · 1 rule, 1 blocking
Solvency capital requirement - non-life underwriting risk (IRR.26.05) · 7 rules, 7 blocking
Solvency capital requirement - simplifications (IRR.26.07) · 20 rules, 20 blocking
Solvency capital requirement - non-life and health catastrophe risk (IRR.27.01) · 28 rules, 28 blocking

How these pages are written

Every page is written from the rule Line4 Check runs, compiled from the Bank of England's insurance taxonomy 2.2.0, and from the Bank's validations workbook, with the row and column names of the Bank's templates. Nothing is guessed. The plain words are the Bank's own, with each template's code moved after its name. Where the Bank's words are technical (a code or a pattern), they are rewritten from the check itself, and the Bank's own follow them.

The Bank counts its rules by validation ID, so each ID has its own page: IR_bv2630_07-1 and IR_bv2630_07-2 are two.

Checks like this one, run at the point of submission, are the first step to real-time supervision.

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