How does this work with limited assurance (FY26) and reasonable assurance (FY28)?

Assurance is on the data integrity and assertion support, not on Claude's narrative. The assurer reviews the final document and the underlying evidence. Claude is the drafting layer; the sustainability lead, CFO, and assurer rely on the underlying evidence trail. The assurance discipline is preserved.

How do we handle ACCC and ASIC greenwashing risk?

Claude is conservative about unsubstantiated claims and flags claims that need verification. Sustainability lead and GC verify every substantive claim. The substantiation discipline is preserved; the drafting layer accelerates the work without bypassing the verification.

Scope 3 is the hardest disclosure for most reporters.

Yes. Claude does not generate scope 3 data; it drafts the narrative around the data your scope 3 process produces. Methodology, boundaries, assumptions, year-on-year comparison narrative. CFO and sustainability lead verify every figure. We have rolled this out for Australian reporters with mature and immature scope 3 processes.

How does this work with sustainability data platforms (Sphera, Diligent ESG, Workiva, Watershed)?

Sustainability data platforms are excellent for data collection, calculation, audit trail, and the structured record. Claude is the narrative-writing layer that sits beside them. Claude drafts the narrative from the data the platform produces; the platform stores the data and the audit trail.

What's realistic ROI for an ASX 200 first-year ASRS reporter?

Typical pattern: 50 to 70 percent reduction in narrative drafting time across the full ASRS S1 + S2 report. For an ASX 200 with a 4-month reporting cycle and 8 to 15 staff involved (sustainability, finance, IR, GC), that is 1,500 to 3,000 hours of recovered capacity per cycle. Enterprise cost: $20,000 to $35,000 per year for the team. The harder-to-measure benefit is delivering the report on time in year 1 of mandatory ASRS.

What about FY27 and FY28 reporters?

Same playbook, more lead time. FY27 (Group 2: large) and FY28 (Group 3: medium) entities benefit from learning from the FY26 cohort. We have rolled this out for FY27 entities running voluntary early-mover dry runs in FY26 and FY28 entities running data-readiness work in FY26 / FY27.

For ASRS S1 + S2 Reporting Teams

Claude AI for Sustainability Reports and ASRS Climate Disclosures

ASRS S1 and S2 (mandatory from FY26 for large entities, FY27 for mid-tier, FY28 for smaller) is the largest new disclosure obligation Australian businesses have ever faced. Several hundred hours of new narrative writing per cycle. Claude does 50 to 70 percent of the narrative drafting while the sustainability lead, CFO, and external assurer retain every figure and assertion.

We have rolled Claude into Australian sustainability functions for FY26 mandatory ASRS reporters and FY27 / FY28 voluntary early movers. Most see 50 to 70 percent reduction in narrative drafting time across the cycle.

Book an ASRS / Sustainability Briefing (03) 9999 7398

Realistic ROI

50 to 70 percent

Reduction in ASRS narrative drafting time

Across S1 + S2 governance / strategy / risk / metrics

300 to 600 hours

Recovered per cycle (typical ASX 200)

Across the sustainability team + finance + IR

$200 to $400 AUD

Per seat per month

Claude Enterprise (mandatory for board-signed disclosures)

60 to 90 days

Pre-cycle setup

Before first ASRS reporting cycle starts

Why Claude Specifically (Not Just Any AI)

Four properties of Claude make the difference between "tried it once" and "embedded into how the function works".

1M context: AASB S1/S2 + ISSB framework + climate data in one prompt

Claude Opus 4.7 holds up to 1 million tokens. Load AASB S1 and S2 standards, ISSB IFRS S1/S2 (which AASB aligns to), TCFD recommendations, prior sustainability reports, climate data exports, transition plan, scope 1 to 3 data, materiality assessment. Cross-document analysis in one Claude session.

Conservative posture: refuses to draft greenwash or unsubstantiated climate claims

ASRS disclosures carry continuous-disclosure, ACCC greenwashing, and ASIC enforcement risk. Claude flags "this claim needs substantiation" or refuses to make climate claims without data backing. For an assurer-ready cycle, that posture is the feature.

Excellent at structured ASRS narrative in standard-aligned tone

S1 general sustainability narrative, S2 climate narrative, governance / strategy / risk / metrics sections per disclosure category, scenario-analysis narrative, transition-plan narrative, scope 3 methodology narrative. Claude is the strongest general model for the structured standard-aligned writing the cycle demands.

Projects: AASB S1/S2 + prior reports + climate data + materiality pinned

Claude Projects holds AASB S1 and S2, ISSB framework, TCFD, prior sustainability reports, climate data exports, transition plan, scope 1 to 3 data, materiality assessment, house voice. Every conversation starts inside the right context.

The ASRS / Sustainability Reporting Cycle with Claude Embedded

Materiality, governance, strategy, risk, metrics, assurance. Claude has a clear role in each.

Materiality matrix + narrative

Materiality Assessment

Drafts materiality assessment from stakeholder input, sector benchmarks, prior assessment, regulator focus. Sustainability lead finalises.

Governance narrative

Governance Narrative (S1 + S2)

Drafts the governance disclosure (board oversight, management role, integration into business processes) from governance documents and prior narrative.

Strategy + transition narrative

Strategy + Transition Plan

Drafts strategy and transition-plan narrative from strategy documents, transition plan, scenarios. Sustainability lead, CFO, board sign.

Risk management narrative

Risk Management

Drafts risk management narrative (climate-risk identification, assessment, integration into ERM) from ERM framework and climate-risk register.

Metrics + targets narrative

Metrics + Targets

Drafts metrics and targets narrative (scope 1, 2, 3, intensity, internal carbon price, targets, performance) from data. CFO verifies every figure.

Assurer-ready pack

Assurance Pack

Drafts the assurance pack (evidence trail, control descriptions, methodology, materiality memo) for the external assurer. Sustainability lead and CFO finalise.

Eight High-Leverage ASRS / Sustainability Use Cases

Task	Traditional	With Claude	Notes
Full ASRS S1 + S2 narrative	300 to 600 hours per cycle	80 to 150 hours total	Claude drafts each section from standards, data, prior report. Sustainability lead and CFO verify every assertion and figure.
Materiality assessment + narrative	60 to 120 hours per cycle	15 to 25 hours	Claude drafts the matrix, narrative, stakeholder summary. Sustainability lead finalises.
Scope 3 disclosure narrative + methodology	60 to 120 hours per cycle	15 to 25 hours	Claude drafts narrative from data, methodology, prior disclosure. CFO verifies every figure.
Transition plan narrative	80 to 160 hours per cycle	20 to 35 hours	Claude drafts from strategy, targets, prior plan, scenarios. Board and CFO sign.
Scenario analysis narrative (S2)	40 to 80 hours per cycle	10 to 15 hours	Claude drafts narrative from scenario outputs, methodology, prior narrative. Sustainability lead, CFO, board sign.
Assurer-ready evidence pack	60 to 120 hours per cycle	15 to 30 hours	Claude drafts evidence trail, control descriptions, methodology, materiality memo. Sustainability lead and CFO finalise.
Investor sustainability letter	8 to 16 hours per cycle	90 min to 2 hours	Claude drafts from report, strategy, prior investor comms. Head of IR finalises.
Board sustainability brief (quarterly)	8 to 14 hours per brief	90 min to 2 hours	Claude drafts from current data, regulator updates, stakeholder feedback. Sustainability lead and CFO finalise.

Six ASRS Reporting Discipline Notes

Every figure verified by CFO + sustainability lead

ASRS figures carry continuous-disclosure and assurance-grade requirements (limited assurance from FY26, reasonable assurance from FY28 for large entities). Claude drafts; CFO and sustainability lead verify every figure against source data.

Greenwashing discipline preserved

ACCC has greenwashing as an enforcement priority; ASIC has greenwashing in scope. Claude flags unsubstantiated claims; sustainability lead and GC verify every substantive claim before publication. The substantiation discipline is preserved.

Forward-looking statements restricted

Transition-plan forward-looking statements (targets, pathways, scenarios) carry continuous-disclosure risk. Pin in the Project: "Claude drafts the narrative around approved targets and approved pathways. New forward-looking commitments require board sign-off."

Audit-committee briefing before first cycle

Audit committee briefed on AI use in sustainability reporting before the first cycle. Document the verification chain, the access pattern, the named-accountable-officer discipline. We draft the audit-committee paper as part of the engagement.

External assurer notified of AI use

External assurer (Big 4 or mid-tier sustainability assurance team) notified of AI use in narrative drafting. Assurance focus on data integrity and assertion support unchanged.

Assurance-ready evidence trail maintained

Assurance requires evidence trail: data source, methodology, internal control, sign-off. Claude drafts the evidence-trail pack from the underlying records; the sustainability lead, CFO, and external assurer rely on the underlying evidence (not on Claude's representation of it).

How Yes AI Helps With ASRS Reporting

ASRS Project setup

We load AASB S1 and S2, ISSB framework, TCFD, prior sustainability reports, climate data exports, transition plan, scope 1 to 3 data, materiality assessment, and house voice into a restricted Enterprise Project. From day one every cycle conversation starts with the right standards and data context.

ASRS prompt library

The 15 to 25 prompts the cycle runs: materiality, governance, strategy, transition plan, risk management, metrics + targets, scope 3, scenario analysis, assurer pack, investor letter, board brief. Saved in the Project library.

ASRS cycle working session (full day)

Full-day session with sustainability lead, CFO finance team, climate-data specialists, external sustainability advisor. We run real current cycle work through Claude. Outputs become 15 to 25 saved prompts.

Annual review + audit-committee + assurer brief

Annual (60 min) pre-cycle with sustainability lead and CFO. Refresh standards Project, retire stale prompts, brief on new features. Annual paper to audit committee and notification to external assurer.

Our 5-Step ASRS Rollout

Most ASRS-reporting entities complete the setup in 60 to 90 days, before the first reporting cycle.

Discovery with sustainability lead + CFO + GC

Half-day session. Map the cycle, the ASRS / TCFD obligations, the data flows, the assurer relationship, the board sign-off chain. Agree engagement scope.

Procure Claude Enterprise + set up ASRS Project

Set up Enterprise with admin audit logs and data residency. Build the restricted ASRS Project with standards, prior reports, climate data pre-loaded.

Cycle working session (full day)

Full-day session with cycle team. Run real current cycle work through Claude. Outputs become 15 to 25 saved prompts.

Audit-committee brief + assurer notification

Draft audit-committee paper on AI approach. Notify external assurer. Document verification chain.

Annual review

60 min once a year, pre-cycle. Refresh standards Project, retire stale prompts, brief on new features. Annual audit-committee update.

FAQ

Book an ASRS / Sustainability Briefing

90-min working session for the sustainability lead and CFO. We walk through the cycle rollout playbook, address ASRS, greenwashing, and assurer concerns, and propose a STANDARD or STRATEGIC engagement scope.