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Socio de formación del ISSB IFRS S2 · Climate-related Disclosures · Paragraphs 29–a–vi–1

Scope 3 categories

s2-29-a-vi-1 · mandatory · metrics + narrative

This asks the organisation to explain which Scope 3 categories are included in the emissions information it reports. In practice, the focus is on making clear the boundary of the Scope 3 figure: which upstream and downstream categories are covered, and whether any categories are left out or treated separately.

Foco de la divulgación

The practical point is comparability and completeness. A reader should be able to see whether the reported Scope 3 number reflects all relevant categories across the business, or only a selected set such as the most material ones, flagship operations, or categories where data are available. If coverage is partial, that should be clear from the disclosure.

Este material formativo de LRA apoya la preparación de la divulgación. Para los requisitos exactos, consulte siempre la fuente oficial de IFRS.

Preparar

Qué recopilar antes de redactar

Marque cada campo cuando llegue la evidencia. Los responsables son los equipos que suelen custodiar los archivos fuente.

  • Excluded categories

    Sustainability reporting

    List the emissions categories left out of the calculation, and give the reason each one was left out.

    Evidencia Working papers showing the boundary decision, category list, and the documented reason for each exclusion.

    Atención a The excluded set does not reconcile to the category inventory, so a category is left out without a documented reason.

  • Impracticability note

    Sustainability reporting

    Record whether a formal note was prepared to explain why a full calculation could not be done, and keep the wording used.

    Evidencia Signed methodology memo or disclosure draft showing the impracticability explanation and approval trail.

    Atención a The note is used without a supporting memo, so the explanation is not tied to the actual data limitation or reporting period.

  • Included Scope 3 list

    Sustainability reporting

    Capture which upstream and downstream emissions categories are included in the reported Scope 3 set.

    Evidencia Scope mapping, category register, and consolidation workbook showing the final included categories.

    Atención a The included list does not match the category mapping, so one or more relevant categories are omitted or double-counted.

  • Calculation basis

    Sustainability reporting

    Set out the calculation approach, key assumptions, and any estimation rules used to build the figure.

    Evidencia Method statement, calculation model, and assumption log with version control and sign-off.

    Atención a The assumptions are not aligned to the model inputs, so the calculation basis changes between files or reporting cycles.

  • Data source mix

    Sustainability reporting

    Show how much of the result comes from direct source data versus estimated or third-party data.

    Evidencia Source register and calculation workbook with fields tagged by data origin and aggregation method.

    Atención a Primary and secondary inputs are mixed without a clear split, so the reported mix cannot be traced back to the source files.

  • Value chain boundary

    Sustainability reporting

    Describe which parts of the upstream and downstream chain are inside the reporting boundary and which are not.

    Evidencia Boundary memo, supplier/customer coverage list, and process map showing the included stages.

    Atención a The boundary is set at the wrong stage, so the reported scope does not match the defined value-chain coverage.

  • Verified data share

    Sustainability reporting

    Calculate the share of the reported figure that has been independently checked, using the same total as the main disclosure.

    Evidencia Assurance report or verification log linked to the reported total and the verified subset.

    Atención a The verified portion is calculated against a different total, so the percentage does not reconcile to the disclosed figure.

Antes de empezar

  • Which parts of the value chain are you treating as in scope, and which are you leaving out?
  • For any category you are not covering, have you settled the reason and whether an impracticability note will be used?
  • Are you clear on the method and assumptions that will sit behind the figures, including how you define the categories you are using?
  • Will the numbers come mainly from your own records, from external sources, or a mix of both?
  • Do the figures relate to the reporting period you are using, and can you trace them back to source evidence?
  • If you plan to show a verified-data share, have you agreed what counts as verified and how that share will be calculated?
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Cómo prepararlo

Set the boundary for the value chain work first, so you know which parts of upstream and downstream activity are in scope for this disclosure and which are not.
Decide, in plain business terms, what will count for each required field: the included Scope 3 categories, the mix of direct and indirect information, the share of data that has been checked, and any methodology or assumptions you will rely on.
Gather the support behind each figure or statement, including source records, working papers, and any checks that show how the numbers or narrative were built.
Prepare the disclosure content itself, making sure you can state the categories left out and why, explain the value-chain coverage, describe the data mix, and set out the methods and assumptions used.
If you rely on an impracticability explanation, draft it clearly and keep it linked to the specific item it supports, rather than treating it as a general note.
Before finalising, compare your draft with the official source to confirm nothing has been missed, any exclusions are explained, and any changes from prior workings are documented consistently.

Solicitar los datos

Request the Scope 3 category evidence pack

Traduzca la divulgación a una pregunta de negocio interna y adáptela después al lenguaje propio de su organización.

Which value-chain emissions categories are included in our reporting, which ones are left out, and what support do we have for the choices and calculation approach?

Use your organisation’s own labels for value-chain emissions, spend, logistics, purchased goods, travel, waste, and similar internal groupings first; then map them to the reporting categories only when you prepare the disclosure pack. Keep the request in the language the data owner already uses, and check the official source before sign-off.

Solicitud débil

Please provide the Scope 3 category disclosure inputs for the reporting period, including excluded categories, methodology, data mix, value-chain scope, and verified-data share.

Por qué falla: This uses framework language that many internal owners will not recognise, so it is harder to action and easier to answer incompletely. It also does not tell the owner what their own files, labels, or evidence should look like, so the response may not be usable for the reporting pack.

Solicitud mejor

Please send the value-chain emissions pack for [period] from your team’s own systems and working files. Use your normal internal category names first, then map them to the reporting categories if needed. Include what you covered, what you left out and why, the method and assumptions, the split between supplier/activity data and estimates, the coverage of the value-chain, and the share of data that has been checked or verified.

Plantilla de correo formal
Subject: Request for value-chain emissions category evidence pack

Hi [name],

I’m pulling together the reporting pack for [period] and need your help with the value-chain emissions section.

Please could you send over the information for the areas your team owns, using your normal internal labels first and then, if helpful, mapping them to the reporting categories?

I’m looking for:
- which value-chain areas are included in this cycle
- which areas are left out, and why
- the method and main assumptions used
- the split between supplier/activity data and estimated data
- the scope of the value-chain covered
- the share of data that has been checked or verified

A simple table plus any supporting notes, files, or links would be ideal.

Please include the period covered, the source system or file, and the person who prepared it.

If anything is unclear, I’m happy to talk it through. Please also check the official source before sign-off.

Thanks,
[preparer name]
Versión corta para Teams / Slack
Hi [name] — could you share the value-chain emissions evidence for [period] from your team’s normal files/systems? I need: included areas, excluded areas and why, method/assumptions, primary vs estimated data split, coverage, and any checked/verified share. A table plus notes is fine. Please use your own internal labels first, then map if needed. Thanks — [preparer name]

Ejemplos sectoriales

Manufacturing

Contexto. A plant team tracks purchased materials, inbound freight, waste, and outsourced processing in separate operational files.

Solicitud adaptada. Please share the emissions evidence pack for [period] from your plant reporting files. Use your own labels for materials, transport, waste, and outsourced work first, then map them if needed. Include what was covered, what was left out and why, the calculation method, the assumptions used, the split between supplier data and estimates, the value-chain areas covered, and the share of data that was checked.

Ejemplo de respuesta. Included: purchased steel, inbound road freight, production waste, and third-party coating. Excluded: employee commuting, because it was not assessed in this cycle. Method: supplier activity data for steel and freight; spend-based estimates for waste and coating. Primary data share: 58%. Checked data share: 41%.

Retail

Contexto. A retail sustainability team holds data on bought-in products, upstream transport, packaging, store waste, and some customer-use assumptions.

Solicitud adaptada. Please send the value-chain emissions evidence for [period] from your retail reporting workbook and source files. Use your internal labels for product supply, logistics, packaging, store waste, and customer-related assumptions first, then map them if needed. Include included and excluded areas, reasons for any exclusions, the method and assumptions, the split between direct supplier data and estimates, the coverage of the value chain, and the share of data that has been checked or verified.

Ejemplo de respuesta. Included: bought-in products, inbound logistics, packaging, and store waste. Excluded: customer use of products, because the team has not modelled it this year. Method: supplier data for packaging and logistics where available; estimates for product categories with limited supplier detail. Primary data share: 46%. Verified data share: 29%.

Redacte su divulgación

Notas que convierten los datos en una divulgación

Plantillas formativas de LRA: adáptelas a su organización y consulte la fuente oficial antes de la aprobación.

Nota metodológica

Set out the calculation basis in plain terms, including the assumptions used, how the boundary was drawn, which categories were included or left out, and whether any exclusions were due to practical limits.

Nota de contexto

Explain what the figures represent in business terms, including how much of the value chain is covered, the mix of direct and indirect data, and the extent to which the underlying information has been checked.

Declaración sobre las variaciones

If the numbers move materially from one period to the next, point to the main drivers — such as a wider or narrower boundary, a different data mix, or changes in the share of checked information — and say whether the shift reflects a real change or a reporting-method change.

Entrada del índice de contenidos

s2-29-a-vi-1 Scope 3 categories — [location / page] / [notes]

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Verificación

Para cada afirmación, compruebe la evidencia

  • We documented which parts of the wider value chain we left out of the coverage figure, and why those parts were not brought in.

    Riesgos An assurer will test whether the exclusions were chosen consistently, whether the reasons are specific rather than generic, and whether any omitted parts should have been included.

    Evidencia que comprobar Boundary memo or methodology note; list of excluded categories; management rationale for each exclusion; review sign-off; any correspondence showing how the boundary decision was agreed.

  • Where we relied on an impracticability judgement, we recorded that conclusion and kept notes on how we are still handling the related emissions estimate in practice.

    Riesgos An assurer will probe whether the impracticability call was made on a supportable basis, whether it was applied only where needed, and whether the related emissions were still addressed through an appropriate process.

    Evidencia que comprobar Impracticability assessment; internal approvals; working papers showing the estimation approach used instead; action plan or controls for ongoing handling; evidence of periodic reassessment.

  • We set out which value-chain categories were brought into the disclosed figure, and the list matches the scope we used in the working papers.

    Riesgos An assurer will check completeness and consistency: whether all intended categories were included, whether any category was accidentally left out, and whether the published list matches the calculation file.

    Evidencia que comprobar Category mapping schedule; calculation workbook; consolidation or boundary checklist; draft-to-final comparison; sign-off from the preparer and reviewer.

  • Our method note explains how we measured the figure, including the main inputs we used and the assumptions we applied.

    Riesgos An assurer will test whether the method is described clearly enough to reproduce the result, whether the inputs are appropriate, and whether the assumptions are reasonable and consistently applied.

    Evidencia que comprobar Methodology paper; calculation model; assumption log; source data extracts; version history showing changes and approvals.

  • We can show how much of the figure came from direct activity information from within the value chain, rather than from broader estimates alone.

    Riesgos An assurer will examine whether the stated mix of direct and indirect inputs is accurate, whether the direct activity data is sufficiently relevant, and whether the mix was calculated on a consistent basis.

    Evidencia que comprobar Data source register; activity-level data files; allocation logic; calculation of the direct-input share; evidence of review over source selection.

  • Our boundary note makes clear which upstream and downstream parts were counted, and which related categories were left out.

    Riesgos An assurer will probe whether the boundary description is complete, whether the omitted categories were intentionally excluded, and whether the published wording matches the internal scope decision.

    Evidencia que comprobar Boundary statement; category inclusion/exclusion matrix; internal scope papers; management review notes; final disclosure cross-check.

Paquete de evidencia que preparar

Carencias habituales en los informes

  • Figures are stated without the supporting narrative, or narrative without figures.
  • Scope is inconsistent between the text and the numbers.
  • The reporting boundary is left undefined.
  • Material changes since the previous period are not disclosed.
  • Estimates and measured values are not distinguished.
  • Source records for the figures are not identified.

Dónde fallan los borradores

Errores que evitar y dónde se requiere juicio profesional

La columna izquierda muestra lo que los preparadores hacen mal al recopilar; la derecha, dónde tendrá que tomar y explicar un juicio.

Errores que evitar

  • Unclear ownerThe request goes to the wrong team or person, so the data is chased in framework language instead of the organisation’s own operational terms.
  • No boundary setPeople start collecting figures before agreeing which parts of the business and value chain are in scope, so different teams work to different cut-offs.
  • Wrong reporting periodThe data pull uses a different time basis from the rest of the pack, which leaves the category set out of step with the reporting cycle.
  • Mixed counting basisSome teams send direct records while others send estimates without flagging the difference, so the final mix is not built on one consistent basis.
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Requiere juicio profesional

  • Boundary shifts after buying or selling a businessSet out whether the reporting perimeter was updated for the year’s acquisitions or disposals, and explain which value-chain activities were brought in or left out as a result.
  • Different country labels for the same activityWhere local records use different names or groupings, map them to one internal category basis and explain the mapping so the same activity is not counted twice or missed.
  • Activities close to the edge of the value chainFor shared, outsourced or partially controlled activities, state the rule used to decide inclusion or exclusion and explain any cases treated differently from the main approach.
  • Choosing the cut-off date for the yearIf the reporting period does not align neatly with operational or supplier data cycles, explain the date basis used and why it gives the fairest picture for the year.
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Ejemplos

Cómo se lee en la página

Sintéticos, redactados por LRA: no proceden del informe de ninguna empresa ni del texto de ninguna norma.

Illustrative (synthetic) example — Manufacturing

we set out the value-chain emissions areas we left out, and why, because some upstream and downstream activities could not be measured with enough confidence for this reporting cycle. We also note where we relied on estimates rather than direct records, the parts of the chain covered by our review, and the main calculation choices and assumptions used.
- We included purchased goods and services, capital items, fuel- and energy-related activities, upstream transport and distribution, waste from operations, business travel, employee commuting, leased assets, downstream transport and distribution, processing of sold products, use of sold products, end-of-life treatment of sold products, and downstream leased assets; we excluded investments, franchises, and downstream processing where we had no reliable activity data, and we treated those exclusions as immaterial to the overall result.
- Our figures combine 68% primary records and 32% secondary factors; 74% of the total is based on data we had checked or had independently assured, while the rest comes from modelled or supplier-estimated inputs. We covered our own operations plus upstream and downstream activities across the full value chain, and we used spend-based factors where supplier-specific data were not available, distance-based methods for freight, and product-use assumptions based on expected lifetime and energy intensity.

Synthetic illustration for practitioner review only; not legal or compliance advice.

Illustrative (synthetic) example — Retail

we explain which emissions areas were left out, the reason for each omission, and the point at which we judged further estimation to be too uncertain for this year’s report. We also describe the parts of the chain we covered, the mix of direct records and external factors, and the main assumptions behind the calculations.
- We reported on purchased goods and services, upstream transport and distribution, waste from operations, business travel, employee commuting, leased assets, downstream transport and distribution, use of sold products, and end-of-life treatment of sold products; we left out capital items, fuel- and energy-related activities, processing of sold products, investments, and franchises because the available information was too patchy or the activity was not material for our business model.
- Our dataset was 41% direct supplier or internal records and 59% third-party or modelled inputs; 62% of the total emissions figure rests on data that had been checked by an external party or otherwise verified, with the remainder unverified. We covered upstream, our own operations, and selected downstream stages, and we used average emission factors for missing supplier data, route-based freight estimates, and product-use assumptions tied to average customer behaviour and product life.

Synthetic illustration for practitioner review only; not legal or compliance advice.

Escalera de calidad

  • Básico

    I included Scope 3 categories 1, 2 and 4, and I left out categories 3 and 5 because we could not gather reliable data for them.

  • Mejor

    I included categories 1, 2 and 4 across our value chain, excluded categories 3 and 5 with a short reason for each gap, and used a mix of direct records and estimates based on our stated method.

  • Óptimo

    I reported categories 1, 2 and 4 for the full value chain in the year ended 31 December 2025, explained why categories 3 and 5 were left out, set out the method and assumptions, showed that 60% of the data was directly verified, and noted that the excluded items were omitted because the underlying records were not available in time.

Compruebe su comprensión

Escenarios para trabajar

A preparer has mapped 11 upstream and downstream emissions categories for the year, but two of them were left out because the team could not obtain reliable activity data in time. The draft note also says those two areas were not included in the totals.

PHow should the team handle the omitted categories in the disclosure, and what extra explanation is needed if the omission is due to practical limits on data collection?
Mostrar la respuesta modelo →

A group has included only purchased goods, transport, waste, and business travel in its value-chain emissions work because those were the only areas with usable data this year. The sustainability team is unsure whether it should also describe the wider set of categories it considered but did not include.

PShould the disclosure show only the categories counted, or also make clear which other categories were excluded from the scope of the calculation?
Mostrar la respuesta modelo →

A preparer has built the calculation using a mix of supplier invoices, internal records, and industry averages. The team has also applied a few simplifying assumptions where direct measurements were unavailable, but these choices are only documented in working papers.

PWhat should be brought into the disclosure so users can understand how the value-chain categories were compiled?
Mostrar la respuesta modelo →

A company has complete supplier data for some categories, partial internal data for others, and industry-average estimates for the rest. The draft note says only that the figures are ‘based on available information’ and does not explain the data mix or the coverage of the value chain.

PWhat should the preparer clarify about the data sources and the part of the value chain covered by the calculation?
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Informes reales

How 3 companies report it

Ejemplos de práctica de reporte completa y parcial. Son análisis basados en evidencia, no plantillas exactas para copiar.

Informes reales publicados

Iberdrola, S.A.

Partial

Electric Utilities / IPP / Energy Traders · Spain · 2025 · p.48 ↗

Iberdrola’s 2025 Sustainability Report includes a disclosure on the mix of primary versus secondary data used for emissions calculations, noting on page 50 that categories 1 and 7 use secondary data while all others rely on primary data. The report also references verification of the Group’s inventory of Scope 1, 2, and 3 gross greenhouse gas emissions on page 46, though it does not clearly specify the share of verified data or fully detail the included Scope 3 categories. Notably, the report lacks explicit information on excluded categories and their rationale, any impracticability statements, methodology assumptions, and the overall value chain scope.

Lite-On Technology Corporation

Partial

Technology Hardware and Equipment · Taiwan · 2025 · p.77 ↗

Lite-On Technology Corporation’s 2025 Annual Report includes some related context on methodology assumptions for climate scenario analysis, mentioning the use of RCP2.6, but does not clearly disclose specific assumptions or analysis factors (p.75). There is no evidence found regarding excluded categories and rationale, impracticability statements, included scope 3 categories, primary versus secondary data mix, value chain scope, or the share of verified data. Overall, the report provides limited and unclear information on the detailed methodology and scope related to this disclosure.

CJ Cheiljedang Corporation

Partial

Food Production — Agricultural · South Korea · 2024 · p.31 ↗

CJ Cheiljedang Corporation’s Sustainability Report 2024 provides some context on Scope 3 emissions categories and efforts to improve activity data and calculation methodologies, mentioning photovoltaic facilities added in 2024 (p.24). The report includes data on Scope 3 emissions by category for 2022 to 2024, such as waste generated in operations and downstream transportation and distribution, but does not clearly disclose the included Scope 3 categories or the share of verified data (p.101). There is no evidence found regarding excluded categories and rationale, impracticability statements, methodology assumptions, primary versus secondary data mix, or value chain scope.
CampoIberdrola, S.A.Lite-On Technology CorporationCJ Cheiljedang Corporation
Excluded categoriesNo encontradoNo encontradoNo encontrado
Impracticability noteNo encontradoNo encontradoNo encontrado
Included Scope 3 listParcialNo encontradoParcial
Calculation basisNo encontradoParcialNo encontrado
Data source mixNo encontradoNo encontradoNo encontrado
Value chain boundaryNo encontradoNo encontradoNo encontrado
Verified data shareParcialNo encontradoParcial

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Prueba ¿Cómo preparo s2-29-a-vi-1? ¿Qué datos necesito recopilar? ¿Dónde puedo ver un ejemplo de un informe real? ¿Qué errores debo evitar?

Referencias del marco

Requisitos aplicables de IFRS / ISSB y divulgaciones relacionadas

IFRS / ISSB

s2-29-a-vi-1

dentro de IFRS S2: Climate-related Disclosures

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Preguntas frecuentes

Preguntas que responde esta página

For s2-29-a-vi-1, what should I gather before I start drafting the disclosure?+
How do I decide the value chain boundary for s2-29-a-vi-1 using this page?+
What does the page mean by excluded categories and how do I record them for s2-29-a-vi-1?+
What evidence should I keep for assurance on s2-29-a-vi-1?+
How do I use the six assurance claims on the s2-29-a-vi-1 page?+
What are the most common mistakes to avoid when drafting s2-29-a-vi-1?+
How do I use the Prep & Assurance workbook for s2-29-a-vi-1?+
What can I take from the synthetic example disclosure for s2-29-a-vi-1?+
How do I turn the s2-29-a-vi-1 data into a draft narrative and content index line?+
Can I reuse data from an ESRS E1 climate disclosure for s2-29-a-vi-1?+

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