What it means
The framework groups events into four buckets and applies a different treatment to each. Changes in accounting principle and changes in reporting entity are applied retrospectively, changes in estimate are applied prospectively, and errors in previously issued statements are corrected by restating the affected prior periods.
Getting the classification right is the whole exercise, because each bucket produces a very different set of published numbers. The most sensitive of the four is error correction.
An error is a mistake under the rules that already applied, such as a missed accrual, a mathematical slip, an oversight of available facts, or a misapplication of a standard. When the error is material, the business restates the affected comparative figures and adjusts the opening balance of retained earnings for the earliest period presented, so the cumulative effect lands in equity rather than distorting the current year's profit.
Restatement is a serious event and organisations treat it as one. It usually means the previously published statements can no longer be relied upon, which triggers communication with lenders, investors and sometimes regulators.
Because of that, materiality assessment is done carefully: immaterial errors are typically corrected in the current period rather than by restating history. Estimates get a gentler treatment for a good reason.
Revising a bad debt provision or a warranty accrual because new information arrived is not an admission that anything was wrong, so the revision flows through the current period and future ones with no restatement. If an estimate changes because facts that existed at the time were ignored, though, it is an error, not a change in estimate.
Disclosure carries as much weight as the arithmetic. Whatever the category, the notes should explain the nature of the change or error, the reason for it, the amount of the adjustment for each line item affected, and the effect on earnings per share where relevant.
That transparency is what allows an analyst to rebuild a comparable multi year trend.
In practice
Real-world examples.
Example
A software business realises it capitalised $260,000 of development costs that failed the recognition criteria under the standard it was already applying. Because this is an error rather than a change in view, the prior year is restated and the asset is removed, with opening retained earnings reduced by the net of tax amount.
Example
A construction firm revises its estimate of costs to complete on a long term contract after a supplier price rise, reducing expected margin by $340,000. This is a change in estimate, so the effect is taken in the current period and no prior statement is reopened.
Example
A group changes its inventory costing method following an accounting policy review and applies the new method retrospectively. Prior year cost of sales moves by $520,000, the comparative gross margin is restated, and the notes quantify the effect on each affected line.
Formula
Calculation
For a material prior period error, the restatement is: Adjustment to opening retained earnings = Pre-tax error amount - Related tax effect, with the comparative figures corrected line by line.
A distribution company discovers after publication that depreciation on a warehouse fit out was understated by $180,000 in the prior year, because an asset was recorded at the wrong cost. The company's tax rate is 25%.
Tax effect: $180,000 x 25% = $45,000.
Net of tax adjustment: $180,000 - $45,000 = $135,000.
Opening retained earnings for the current year were previously reported as $4,200,000, so the restated figure is $4,200,000 - $135,000 = $4,065,000. The prior year comparative depreciation expense increases by $180,000, the prior year tax charge falls by $45,000, prior year net profit falls by $135,000, and the accumulated depreciation balance rises by $180,000. Nothing at all is charged against the current year's profit, because the cost belonged to last year.Case study
Seen in the real world.
Halberd Retail Group is an invented company used here purely as an illustrative case. Three months after publishing its annual accounts, the finance team found that supplier rebates of $920,000 had been recognised in the wrong period for two consecutive years, because a spreadsheet linked to the wrong contract schedule.
The audit committee assessed materiality against pre-tax profit of $11,000,000 and concluded the misstatement was material, so a correction in the current period was not acceptable. The group restated both comparative years, adjusted opening retained earnings, and issued a note setting out the effect on revenue, cost of sales, receivables and earnings per share.
The share price fell on the announcement and then recovered over the following quarter, largely because the disclosure was detailed and the group simultaneously announced a rebate accounting control with independent contract review. The illustrative lesson is that the restatement itself does less damage than the suspicion that more remains undiscovered.
Watch out
Common mistakes.
- Correcting a material prior year error by putting the whole adjustment through the current year's profit. That hides the mistake inside current trading and makes both years misleading rather than one.
- Labelling an error as a change in estimate to avoid restating. If the facts were available and were simply missed, it is an error, and calling it something else compounds the original problem.
- Restating history for every small mistake. Immaterial errors are normally corrected in the current period, and unnecessary restatements alarm lenders and investors for no analytical gain.
Questions
People also ask.
What is the difference between a change in accounting principle and an error?
A change in principle moves between two acceptable methods, while an error is a departure from the rules that already applied at the time.
Does correcting an error affect the current year's reported profit?
Generally not, because a material correction is taken to opening retained earnings and the restated comparatives, leaving current year trading undistorted.
Who needs to be told when statements are restated?
Typically the auditors, the board, lenders whose covenants use the affected figures, and, for listed businesses, the market through a formal announcement.
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