## Sufficient Audit Evidence

Sufficiency refers to the quantity of audit evidence collected.

### Sufficiency vs. Quality (Appropriateness)

> High-quality (appropriate) evidence → Less quantity needed

> Low-quality evidence → More quantity needed

> High ROMM → More quantity needed

---

### Factors Affecting Sufficiency

#### A) Materiality / Significance of Assertion to Users

Significance	Evidence Required
More significant to users	More evidence required
Less significant to users	Less evidence required

#### B) Risk of Material Misstatement (ROMM)

ROMM Level	Evidence Required
High ROMM	More evidence required
Low ROMM	Less evidence required

#### C) Size & Characteristics of the Population

Population Type	Evidence Required
Small, homogeneous population	Less evidence required
Large, heterogeneous population	More evidence required

---

### Summary Table

Factor	Increases Evidence Needed	Decreases Evidence Needed
ROMM	Higher ROMM	Lower ROMM
Quality of evidence	Lower quality	Higher quality
Materiality	More significant	Less significant
Population	Large, heterogeneous	Small, homogeneous

Worked example

### Example 1

Revenue recognition for a telecom company (millions of heterogeneous transactions, high ROMM) requires substantially more audit evidence than testing prepaid stationery expenses (small, homogeneous, immaterial).

### Example 2

If the auditor obtains a bank confirmation directly from the bank (high-quality external evidence), fewer additional procedures are needed to verify the bank balance compared to relying only on the client's bank reconciliation.

⚠️ Common exam mistakes

Thinking 'more evidence is always better' — high-quality evidence reduces the quantity needed; over-auditing wastes resources
Forgetting the inverse relationship: higher quality of evidence REDUCES the quantity required (not increases)
Applying the same evidence threshold to all accounts regardless of materiality and ROMM
Confusing sufficiency (quantity) with appropriateness (quality) — they are distinct but interrelated concepts

Reference: SA 500 – Sufficiency of Audit Evidence — SA 500 – Audit Evidence (ICAI)

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 →

SA 500 – Sufficient Audit Evidence: Quantity and Influencing Factors

Worked example

⚠️ Common exam mistakes