Accountancy · Ch 2 — Theory Base of Accounting
Consistency Concept
Consistency Concept
The Consistency Concept
The financial statements of a business are meant to be useful. For them to be truly useful, you must be able to compare them — compare this year's performance with last year's, or compare your business with a competitor's. This is where the Consistency Concept comes in.
The core idea is simple: once a business chooses an accounting policy or method, it should stick with that same method from one accounting period to the next. This ensures that the figures you see in the financial statements are comparable over time (inter-period comparison) and across different firms (inter-firm comparison).
Why Consistency Matters
Imagine an investor looking at a company's net profit. This year it is ₹10 lakh, last year it was ₹8 lakh. A 25% increase — excellent. But what if the company changed its method of calculating depreciation this year? Last year it used the Straight Line Method; this year it switched to the Written Down Value method. The profit figures are no longer comparable. The increase might be entirely due to the change in method, not an improvement in actual performance. The investor would be misled.
The same logic applies to stock valuation. If a firm values its closing stock using FIFO one year and Weighted Average the next, the cost of goods sold and the profit will change, making a comparison between the two years meaningless.
Consistency eliminates personal bias and ensures that the results of different accounting periods are comparable. It is the foundation for meaningful trend analysis.
What Consistency Applies To
Consistency applies to all accounting policies and practices, including:
- Methods of depreciation (SLM vs. WDV)
- Methods of stock valuation (FIFO, Weighted Average, etc.)
- Treatment of goodwill
- Treatment of research and development expenditure
- Classification of assets and liabilities
The Critical Exception: Consistency Does Not Mean Rigidity
This is a point the textbook makes very clearly. Consistency does not mean a business can never change its accounting policies. If a change is genuinely required — for example, to comply with a new accounting standard, or because a different method gives a more accurate picture of the business — the change is allowed.
However, the concept demands full disclosure. When a change is made, the business must:
- Clearly state in the financial statements that a change in accounting policy has occurred. …