UK SRS S2 Financed Emissions and Paragraph B59A: What Financial Institutions Must Explain

Educational practitioner material. Illustrative examples and wording require adaptation and technical review.

Financial institutions frequently close their financial statements before complete borrower or investee emissions data for the same period are available. Exposure balances may be current, while counterparty emissions, revenue or enterprise-value data lag by a year or more. The UK consultation recognised that using a previous-period balance sheet or other lagged inputs can still produce decision-useful time-series information, but it can also weaken connectivity and conceal recent changes in risk exposure unless the timing is explained.

The UK Government therefore added paragraph B59A to UK SRS S2. It is not part of IFRS S2 itself. The paragraph creates a specific transparency mechanism for an entity that determines it is impracticable to reliably estimate financed emissions for the same reporting period as the related financial statements. It does not simply replace the B61, B62 or B63 disclosures with a sentence saying that data are unavailable.

The B59A decision flow starts with reasonable efforts to produce same-period information and then separates a normal financed-emissions disclosure from the three-part B59A explanation.

A one-year lag in counterparty emissions data does not automatically make same-period financed emissions impracticable. UK SRS S2 already recognises that Scope 3 information can involve estimates and data from different periods. Paragraphs B40-B56 require the entity to use judgement and prioritise the highest-quality data available. Paragraph B57 presumes that Scope 3 emissions can usually be estimated reliably using secondary data and industry averages. The institution should therefore test whether a current-period estimate can be produced using a controlled combination of current exposure data, the most recent counterparty data, proxy data and adjustments for significant changes.

Impracticability is reached only when the entity cannot apply the requirement after making every reasonable effort. A team should not label a calculation impracticable merely because the preferred primary data are unavailable, a vendor feed is delayed, a portfolio is large or the calculation would require estimates. Those circumstances affect method and uncertainty; they do not necessarily prevent a reliable estimate.

The Government response specifically contemplated the industry practice of using a prior-period balance sheet when current-period estimation is impracticable. Paragraph B59A itself is broader: it requires disclosure of the measurement approach, inputs and assumptions used for any information reported. An institution might, for example, combine prior-year counterparty emissions with a prior-year exposure population, use prior-year emissions with current-period exposures, or use a controlled estimate for part of the portfolio and a lagged population for the remainder.

Each option has different information consequences. A prior-year exposure population may preserve internal consistency between exposures and emissions, but it may not reflect current lending decisions. Current exposures with lagged emissions can better show the current portfolio, but the attribution denominator and counterparty profile may be from a different period. A mixed approach can improve coverage but increases model and aggregation risk. The report should tell users which approach was used and why it remains useful.

State the reporting date or average period used for funded exposure, undrawn commitments and AUM.

State the periods represented by counterparty Scope 1, Scope 2 and Scope 3 emissions and by attribution denominators.

Explain whether the institution uses point-in-time, period-average or another exposure measure and why.

Describe significant events between the counterparty-data date and the institution’s reporting date that were assessed or adjusted.

Explain how acquisitions, disposals, refinancings, repayments, fund flows and mandate changes enter the calculation.

Identify the proportion of the portfolio using primary, secondary, proxy, modelled and verified inputs.

Describe methodology changes and whether comparative information was revised or why revision was impracticable or immaterial.

B59A sits after B59 and before B60. It therefore has to be read with the activity-specific requirements, not as a separate reporting regime. If a bank reports a lagged financed-emissions number, it should still explain the industries and asset classes represented, the gross exposure coverage, exclusions and allocation method to the extent that information is reported. The same principle applies to AUM coverage for asset managers and gross exposure for insurers.

The report should distinguish what is fully aligned to the current financial period, what uses a different data period and what is not reported. A single narrative paragraph can rarely do this well for a large financial institution. A controlled period-and-coverage table is usually clearer.

Paragraph C4 states that an entity applying UK SRS S2 is not required to disclose Scope 3 emissions, including the additional financed-emissions information for asset management, commercial banking and insurance. Unlike IFRS S2, the UK standard itself does not confine that relief to the first annual reporting period; future law or regulatory rules can determine its availability under paragraph C6. UK SRS S1 paragraph 73A requires the use of C4 to be disclosed alongside the UK SRS S2 compliance statement.

B59A, by contrast, is used when the entity is reporting financed-emissions information but cannot reliably estimate it for the same period. It requires the reason, alternative measurement approach and plan. The two mechanisms should not be blended. A report saying 'we used B59A relief' is technically imprecise because B59A is not drafted as the broader C4 exemption from Scope 3 disclosure.

A bare statement that financed emissions are unavailable does not meet the three components of B59A. It also fails to provide the measurement transparency required by paragraph 29(a)(iii) for Scope 3 methods, inputs and assumptions and can obscure the connection between the disclosed portfolio, the related financial statements and the institution's climate-risk narrative. The wider UK SRS S1 fair-presentation and materiality principles reinforce the need for a complete explanation where the missing information could influence users.

The institution should also avoid presenting a small reported subset as though it represented the whole portfolio. If the number covers only listed equities or only large corporate borrowers, the AUM or gross-exposure coverage and excluded asset types should be explicit. B59A does not cure an undisclosed population omission.

1. Map the required B61, B62-B62A or B63-B63A outputs and the reporting dates of their underlying data.

2. Classify each data input by source, period, primary/secondary status, verification and expected availability date.

3. Attempt same-period estimation using the approved Scope 3 data hierarchy and document the alternatives considered.

4. Assess whether any remaining inability meets the “impracticable after every reasonable effort” threshold rather than a convenience or cost preference.

5. Select and document the alternative measurement approach for information that will be reported.

6. Prepare a period bridge and significant-event assessment explaining what the lag could miss.

7. Approve a time-bound remediation plan with systems, data, owner, budget and milestones.

8. Draft the B59A explanation together with the coverage, methodology and compliance/relief notes so the story is internally consistent.

9. Run a dry-run assurance or internal-audit evidence request before final sign-off.

The wording identifies the affected portfolios, the reason, the periods and methods used, intervening-event assessment and a dated plan. It would still need the accompanying B62 or B63 coverage tables, exact methodology and evidence. It should not be copied where the entity has not actually exhausted reasonable estimation options.

Category 15 route: confirm the 29A-29C boundary before designing the B59A explanation.

Bank route: integrate data-timing controls into the gross-exposure and classification architecture.

Insurance route: distinguish investment-portfolio financed emissions from underwriting metrics.

Asset-management route: align AUM population, product data and client reporting calendars.