comparability
7.2 Accounting Policies – Comparability
What are Accounting Policies?
Accounting policies are the specific rules, bases, conventions, rules, and practices a company follows when preparing its financial statements. Think of them as the “game rules” you agree on before you start playing. They make sure everyone plays by the same standards.
Why Comparability Matters
Comparability means you can compare financial statements over time or between companies. If each company uses a different set of rules, the numbers would be like comparing apples to oranges. 📊
Key Principles for Choosing Policies
- Consistency – Use the same policy from year to year unless a change is justified.
- Relevance – Choose policies that give useful information for decision‑making.
- Reliability – Ensure the policy produces true and fair representations.
- Comparability – Align with industry standards or IFRS/UK GAAP where possible.
Common Policy Choices
- Revenue Recognition – When to record sales? (e.g., cash basis vs. accrual basis)
- Inventory Valuation – LIFO, FIFO, or weighted average.
- Depreciation Method – Straight‑line, reducing balance, or units of production.
- Impairment Testing – How often to check if assets are overvalued.
Example: Changing Inventory Valuation
| Period | Policy Used | Effect on Net Income |
|---|---|---|
| 2023 | LIFO | Higher cost of goods sold → Lower profit |
| 2024 | FIFO | Lower cost of goods sold → Higher profit |
Exam Tip: Policy Consistency
When answering exam questions, always check if the company has maintained the same policy over the period. If a change is mentioned, note the justification and impact on the financial statements. 📚
Analogy: The School Report Card
Imagine each school uses a different grading scale. One school gives 100% for a B, another gives 80%. Comparing grades would be confusing. 📖 By agreeing on a standard scale (like the UK GCSE grading system), students can see how they truly performed. Similarly, accounting policies standardise how companies report their numbers.
Quick Check
- Did the company keep the same revenue recognition method? ??
- Were any policy changes disclosed in the notes? ❓
- How would a change affect comparability? 🔄
Mathematical Insight
When a company changes its depreciation method, the annual depreciation expense can be calculated as:
$ \text{Depreciation Expense} = \frac{\text{Cost} - \text{Residual Value}}{\text{Useful Life}} $
Notice how the denominator (useful life) changes with the method, affecting the expense and thus net income.
Revision
Log in to practice.