Ind AS 8 — Accounting Policies, Changes in Estimates and Errors

Ind AS 8 deals with three related things: how an entity selects and applies accounting policies, how it accounts for changes in those policies and in accounting estimates, and how it corrects errors. The standard's purpose is to enhance the relevance, reliability, and comparability of financial statements over time and against other entities. Its treatment of policy changes and prior period errors — applied retrospectively — is one of the more significant differences from the AS framework.

Objective and scope

The objective is to prescribe the criteria for selecting and changing accounting policies, together with the accounting treatment and disclosure of changes in accounting policies, changes in accounting estimates, and corrections of errors. The standard is applied in selecting and applying accounting policies and in accounting for the three types of change.

Selecting and applying accounting policies

Accounting policies are the specific principles, bases, conventions, rules, and practices applied in preparing and presenting financial statements. When a standard specifically applies to a transaction, the policy is determined by applying that standard. In the absence of a specific standard, management uses judgement to develop a policy that results in information that is relevant and reliable, referring first to the requirements in other Ind AS dealing with similar issues and to the definitions and recognition criteria in the framework. Accounting policies are applied consistently for similar transactions unless a standard requires or permits otherwise.

Changes in accounting policies

A change in accounting policy is permitted only if it is required by a standard, or it results in financial statements providing reliable and more relevant information. A change required by a standard is accounted for under that standard's transitional provisions; otherwise, a voluntary change is accounted for retrospectively — that is, the new policy is applied as if it had always been applied. Retrospective application means adjusting the opening balance of each affected component of equity for the earliest prior period presented, and restating the comparative amounts, as if the new policy had always been in use. (Where retrospective application is impracticable, the standard provides limited relief.) This retrospective approach is a major contrast with the AS framework.

Changes in accounting estimates

Many financial statement amounts must be estimated — bad debt provisions, useful lives, warranty obligations, fair values. A change in accounting estimate is an adjustment of the carrying amount of an asset or liability, or the amount of the periodic consumption of an asset, resulting from the assessment of the present status of, and expected future benefits and obligations associated with, assets and liabilities. Changes in estimates result from new information or developments and are not corrections of errors. The effect of a change in estimate is recognised prospectively — in profit or loss in the period of the change (if it affects only that period) or in the period of change and future periods (if it affects both). This prospective treatment is the same as under AS 5.

The standard notes that when it is difficult to distinguish a change in policy from a change in estimate, the change is treated as a change in estimate.

Errors and their correction

Prior period errors are omissions from, and misstatements in, the financial statements for one or more prior periods arising from a failure to use, or misuse of, reliable information that was available when those financial statements were approved and could reasonably be expected to have been obtained and taken into account. Errors include the effects of mathematical mistakes, mistakes in applying policies, oversights, misinterpretations of facts, and fraud.

Material prior period errors are corrected retrospectively in the first financial statements approved after their discovery, by restating the comparative amounts for the prior periods in which the error occurred, or — if the error occurred before the earliest prior period presented — by restating the opening balances of assets, liabilities, and equity for the earliest period presented. The correction is made as if the error had never occurred; it is not included in profit or loss of the period in which the error is discovered. This is the most consequential difference from AS 5, under which prior period items are included in the current period's profit or loss with separate disclosure rather than by restating the past.

Disclosure

For a change in accounting policy, disclosures include the nature of the change, the reasons, and the amount of the adjustment for each line item affected and for prior periods, to the extent practicable. For a change in estimate, the nature and amount of the change is disclosed if it has an effect in the current period or is expected to in future periods. For corrections of errors, the nature of the prior period error and the amount of the correction for each prior period presented are disclosed.

A full worked example

Ind AS 8's whole point is a decision tree: is this a change in policy, a change in estimate, or the correction of an error? Each is treated differently. Consider three situations a company faces in the year, all involving ₹5,00,000.

Situation	Classification	Treatment
Switches inventory formula from FIFO to weighted average	Change in policy	Retrospective — restate prior periods
Revises machinery useful life from 10 to 8 years	Change in estimate	Prospective — adjust current & future depreciation
Discovers last year's sales were overstated by 5,00,000	Prior-period error	Retrospective — restate last year's figures

Why the change in estimate is prospective. Suppose the machine cost ₹40,00,000 with ₹16,00,000 already depreciated (4 years at ₹4,00,000). Revising the remaining life to 4 more years (8 total) changes only future depreciation — no restatement.

Item	Amount (₹)
Carrying amount now	24,00,000
Remaining life (revised)	4 years
New annual depreciation	6,00,000

Why the error is retrospective. The ₹5,00,000 sales overstatement is corrected by restating last year's comparative figures — reducing prior-year revenue and adjusting opening retained earnings — as if the error had never happened.

The distinction is the examinable heart of Ind AS 8: a change in estimate (useful lives, provisions, bad-debt rates) is applied only going forward, because new information legitimately updates a judgement. A change in policy or a prior-period error is applied retrospectively, restating the comparatives, so that the accounts remain comparable over time. Ind AS 8 corresponds to AS 5.

How Ind AS 8 compares with AS 5

Both standards treat changes in estimates prospectively and require a valid basis for changing accounting policies. The differences are significant in two areas. First, Ind AS 8 requires voluntary changes in accounting policy and corrections of material prior period errors to be applied retrospectively (restating comparatives and opening equity), whereas AS 5 includes prior period items in the current period's profit or loss. Second, Ind AS 8 has no concept of extraordinary items, and indeed under Ind AS no item may be presented as extraordinary — consistent with the broader Ind AS framework.

Common pitfalls

Frequent issues include treating a correction of a prior period error as a current-period item rather than restating retrospectively; confusing a change in estimate with an error and applying the wrong treatment; changing an accounting policy without the required justification; and inadequate disclosure of the effects of changes and corrections.

Why this is cleaner on a unified system

Retrospective restatement and reliable correction of prior period errors depend on having complete, consistent historical data — which is far easier to maintain when all financial information lives in one connected system rather than being reconciled across separate tools where past figures may have been recorded inconsistently. A single source of truth makes it more straightforward to identify genuine errors, restate comparatives accurately, and apply policies consistently over time.

This article is a detailed educational summary of Ind AS 8 in plain language. It is not a substitute for the full text of the standard. Accounting standards are amended from time to time; always verify the current, authoritative text of Ind AS 8 as notified under the Companies Act before relying on it, and consult a qualified chartered accountant for application to your specific circumstances.