This article is designed to help you understand the work before you start. It uses the service scope, document checklist and common questions maintained by LEGAL CENTRE; final requirements remain subject to the relevant authority and your facts.
Why this matters to a new or growing CA practice
The 2026 Code of Ethics includes a dedicated volume for Ethics Standards for Sustainability Assurance, including independence standards.
For new CAs, sustainability work is attractive because it combines reporting, controls and assurance, but the engagement needs a clear boundary between advisory work, measurement support and independent assurance.
What to understand
- Identify whether the assignment is advisory, assessment or assurance.
- Document independence threats before accepting assurance work.
- Separate management responsibility from practitioner work.
- Build competence in sustainability metrics, evidence and reporting frameworks.
What to do in practice
- Use an engagement-classification checklist.
- Document the responsible party and intended users.
- Record independence safeguards.
- Keep evidence trails for non-financial metrics as rigorously as financial evidence.
Working-paper checklist
- Create a dated working-paper note stating the objective and scope.
- Keep the primary-source document or link used for the conclusion.
- Record client/practice impact, owner and next action.
- Retain reviewer sign-off for material professional judgement.
Common mistakes to avoid
- Calling advisory work “assurance” without meeting assurance requirements.
- Helping create the subject matter and then ignoring self-review threats.
- Underestimating data-quality problems in ESG metrics.
Current-source note
ICAI’s 2026 Code includes sustainability assurance ethics and independence standards; practitioners should use the current official text for engagement-specific requirements.
This article is an educational practice guide. For a live engagement, verify the latest ICAI, regulator, law, rule, notification, circular, portal instruction or standard that applies to the facts and date of the work.
Answers before you start.
Is this article a substitute for the current ICAI or regulator material?+
No. Use it as a practice orientation and working-paper checklist. Verify the current primary source for the engagement date and facts.
What should a newly qualified CA document first?+
Document the objective, scope, primary source, key facts, professional judgement, reviewer conclusion and next action.
How should a small CA firm use this guide?+
Convert the relevant points into a repeatable checklist or standard operating procedure, then adapt it to the client and engagement.
How do I keep this topic current?+
Maintain an official-update log and record the effective date and impact whenever ICAI or the regulator issues a new announcement, circular, standard or portal change.
Rules, forms, portal processes, statutory fees, timelines and eligibility can change. Confirm the current requirement for your specific case before relying on a filing or compliance step. LEGAL CENTRE is a private service-assistance platform and is not a government authority.