## Assurance Engagements

### What Is an Engagement?

A formal agreement between auditor and client under which the auditor agrees to provide services. It takes the shape of an Engagement Letter.

### What Is an Assurance Engagement?

An engagement in which the practitioner expresses a conclusion designed to enhance the degree of confidence of intended users (other than the responsible party) about the outcome of the evaluation or measurement of a subject matter against criteria.

### Five Elements of an Assurance Engagement

Element	Detail
Three-party relationship	Practitioner + Responsible party + Intended users
Appropriate subject matter	Financial information in financial statements
Suitable criteria	Benchmarks — standards, guidelines, laws, rules & regulations
Sufficient appropriate evidence	Quantity (sufficient) + Quality (appropriate)
Written assurance report	Formal written conclusion in appropriate form

### Types of Assurance Engagements

	Reasonable Assurance	Limited Assurance
Level	High	Lower than reasonable
Procedures	Elaborate & extensive	Fewer procedures
Conclusion form	Positive (reasonable conclusion)	Negative/limited conclusion
Standard example	Audit (SA)	Review (SRE 2400 / SRE 2410)

### Assurance on Non-Historical Financial Information

Provides only moderate level of assurance
Examples: prospective financial information / forecasts, assurance on operation of controls
Standards: SAE 3400, SAE 3420, SAE 3402

### ICAI Framework — Standards Hierarchy

```

ICAI → AASB → Framework for Engagement Standards

┌────────────┴──────────────────┐

Assurance Engagements Agreed-Upon Services

| (No assurance, no independence)

┌─────┴──────┐ SRS 4400 / SRS 4410

Historical FS Prospective FS

(SA) SAE 3400/3420/3402

Absolute (100%) → Investigation

Reasonable (<100%) → Audit (SA)

Limited/Moderate → Review (SRE 2400 / SRE 2410)

```

Worked example

### Example 1

A statutory audit of a company's financial statements is a Reasonable Assurance Engagement — the auditor performs extensive procedures and issues a positive opinion: 'the financial statements give a true and fair view'.

### Example 2

A review of quarterly financial statements under SRE 2410 is a Limited Assurance Engagement — fewer procedures are performed and the conclusion is in negative form: 'nothing has come to our attention that causes us to believe the statements are misstated'.

### Example 3

A CA is engaged to examine a company's projected financial statements prepared for submission to a bank. This falls under SAE 3400 — assurance on prospective financial information, providing only a moderate level of assurance.

⚠️ Common exam mistakes

Confusing 'reasonable assurance' with '100% (absolute) assurance' — reasonable assurance is less than absolute; only investigations claim near-absolute assurance.
Saying an audit engagement provides 'absolute' assurance — it provides REASONABLE assurance.
Forgetting the three-party relationship includes INTENDED USERS as the third party, not just auditor and client.
Mixing up SRS (Standards on Related Services: 4400/4410) with SAE (Standards on Assurance Engagements: 3400/3420) — SRS covers agreed-upon/compilation services which carry NO assurance.

Bare-Act text Definition of Assurance Engagement · ICAI Framework for Assurance Engagements · click to expand

Assurance engagement means an engagement in which the practitioner expresses a conclusion designed to enhance the degree of confidence for the intended users other than the responsible party about the outcome of the evaluation or measurement of a subject matter against criteria.

Now that you've read this — what's next?

Move from understanding → mastery in 3 clicks. Each option below picks up from this lesson's topic.

🔥 Drill 5 Qs on this → ✍️ Adaptive practice →

Assurance Engagements — Concept, Elements, and Types

Worked example

⚠️ Common exam mistakes