Prior Period Errors vs Change in Estimates Under Ind AS 8

1. Introduction

The distinction between a prior period error and a change in accounting estimate is one of the most significant areas in financial reporting under Indian Accounting Standards (Ind AS). In practice, companies often identify errors relating to earlier financial years but account for such adjustments through the current year’s Statement of Profit and Loss by describing them as “changes in estimates” or “revisions in assumptions”.

Such accounting treatment may materially distort the financial performance of the current period because prior period errors are required to be corrected retrospectively, whereas changes in accounting estimates are recognised prospectively. Consequently, inappropriate classification of prior period errors as changes in estimates can lead to manipulation of profitability trends, concealment of weak internal controls, and reduced comparability of financial statements.

Ind AS 8 provides a clear distinction between these concepts and prescribes separate accounting treatments for each. Therefore, proper identification of whether an item represents an error relating to prior periods or a genuine revision in estimate is essential.

This write-up analyses the distinction between prior period errors and changes in estimates under Ind AS with the help of practical illustrations.

2. Understanding the Meaning of Prior Period Errors and Changes in Accounting Estimates

2.1 Prior Period Errors

Paragraph 5 of Ind AS 8 defines prior period errors as omissions from, and misstatements in, the entity’s financial statements for one or more prior periods arising from a failure to use, or misuse of, reliable information:

(a) that was available when financial statements for those periods were authorised for issue; and

(b) that could reasonably be expected to have been obtained and taken into account in the preparation and presentation of those financial statements.

The paragraph further states that such errors include mathematical mistakes, mistakes in applying accounting policies, oversights or misinterpretations of facts, and fraud.

Thus, where reliable information already existed in the earlier period, and the entity failed to appropriately consider such information, the matter generally represents a prior period error.

2.2 Changes in Accounting Estimates

Paragraph 32 of Ind AS 8 states that, as a result of uncertainties inherent in business activities, many items in financial statements cannot be measured precisely and can only be estimated. Estimation involves judgments based on the latest available reliable information.

Paragraph 34 of Ind AS 8 further provides that an estimate may require revision if changes occur in the circumstances on which the estimate was based or as a result of new information or more experience.

Importantly, the paragraph clarifies that a revision of an estimate does not relate to prior periods and is not the correction of an error.

Therefore, a genuine change in estimate arises only when:

(a) new information becomes available;

(b) circumstances change; or

(c) additional experience modifies earlier expectations.

3. Understanding the Difference in Accounting Treatment of Prior Period Errors and Changes in Accounting Estimates

3.1 Accounting Treatment for Prior Period Errors

Paragraph 42 of Ind AS 8 requires an entity to correct material prior period errors retrospectively in the first set of financial statements approved for issue after discovery of the error by:

(a) restating comparative amounts for prior periods presented in which the error occurred; or

(b) where the error occurred before the earliest prior period presented, restating the opening balances of assets, liabilities and equity for the earliest prior period presented.

Thus, prior period errors are not routed through the current year’s profit or loss merely because they are identified in the current period.

3.2 Accounting Treatment for a Change in Estimate

Paragraph 36 of Ind AS 8 provides that the effect of a change in an accounting estimate shall be recognised prospectively by including it in profit or loss:

(a) in the period of the change, if the change affects that period only; or

(b) in the period of the change and future periods, if the change affects both.

Accordingly, only genuine changes in estimates are recognised through current and future period profit or loss.

4. Why are Prior Period Errors Often Disguised as Changes in Estimates?

In practice, companies may classify prior period adjustments as changes in estimates for various reasons, including:

(a) avoidance of retrospective restatement

(b) prevention of adverse impact on previously reported earnings trends

(c) avoidance of regulatory scrutiny

(d) reduction of audit complications

(e) preservation of managerial performance metrics, and

(f) concealment of deficiencies in internal financial controls.

However, such classification is inconsistent with Ind AS, where the underlying issue relates to the misuse or non-use of information that already existed in prior periods.