Accounting Changes and Error Corrections: ASC 250 Guide
Introduction
Should a company revise prior financial statements or record a change in the current and future periods? The answer depends on whether it changed an accounting principle, revised an estimate, changed its reporting entity, or discovered an error.
This guide focuses on U.S. GAAP under ASC 250 for intermediate accounting students and CPA FAR candidates. Learn the differences, work through journal entries, and test both classification and accounting treatment in the quiz.
Updated October 14, 2026 · The worked examples use 2026 as the year of the change or correction and state their tax assumptions.
Accounting changes at a glance
| Category | What changed? | General treatment |
|---|---|---|
| Accounting principle | An accepted accounting method, such as FIFO to weighted-average inventory costing. | Retrospective application, unless specific transition guidance or an impracticability exception applies. |
| Accounting estimate | An estimate based on new information, such as an asset’s remaining useful life. | Prospective application: the current period and future periods affected. |
| Reporting entity | The entity represented by the statements, such as a qualifying common-control reorganization. | Retrospective presentation of the applicable comparative periods. |
| Accounting error | Arithmetic, application of GAAP, or use of facts available when the statements were prepared. | Correct based on timing and materiality; material prior-period errors require restatement. |
Special case: a change in depreciation method for a long-lived nonfinancial asset is a change in estimate effected by a change in principle. Its treatment is prospective.
Changes in accounting principles
A change in accounting principle replaces one generally accepted method with another. For example, a company may change inventory costing from FIFO to weighted-average cost. A voluntary change must be justified because the new method is preferable; an improved earnings result alone is not a justification.
Retrospective application
For a change without special transition requirements, present prior periods using the new principle, as though it had been used throughout. Adjust the opening assets, liabilities, and retained earnings of the earliest period presented for effects arising before that period. Show each comparative period’s own effects in that period.
A new accounting standard may prescribe its own transition method. Follow those requirements first. If retrospective application is impracticable, apply ASC 250’s alternative approach from the earliest practicable period or date; this is not permission to skip available comparative information.
Video: retrospective application and retained earnings
Watch Professor Farhat explain the cumulative adjustment, deferred taxes, and beginning retained earnings. This approximately 13-minute lesson focuses on changes in accounting principle.
Watch the retrospective accounting-principle example on YouTube
- 2:34 — What retrospective application means
- 6:15 — Worked example
- 11:50 — Disclosures and retained earnings presentation
Context for the video: its construction-accounting example uses historical completed-contract and percentage-of-completion terminology to illustrate retrospective mechanics. For current revenue contracts, apply ASC 606’s criteria for recognition over time or at a point in time. These are not freely interchangeable accounting-policy choices. See the FASB’s revenue-recognition guidance.
Worked example: FIFO to weighted-average cost
On January 1, 2026, ABC Corp changes from FIFO to weighted-average cost and documents why the new method is preferable. All information needed for retrospective application is available. Assume a 30% tax rate, an unchanged FIFO tax basis, and full recognition of the resulting deferred tax asset.
| Item | Amount |
|---|---|
| Inventory under FIFO | $500,000 |
| Inventory under weighted-average cost | $450,000 |
| Beginning retained earnings before adjustment | $2,000,000 |
| Pretax cumulative decrease in inventory and earnings | $50,000 |
| Deferred tax asset: $50,000 × 30% | $15,000 |
| After-tax decrease in retained earnings | $35,000 |
Adjusted beginning retained earnings = $2,000,000 − $35,000 = $1,965,000.
| Account | Debit | Credit |
|---|---|---|
| Deferred tax asset | $15,000 | — |
| Retained earnings | $35,000 | — |
| Inventory | — | $50,000 |
The entry reduces book inventory while its tax basis remains unchanged. Its tax effect is a deferred tax asset under the stated assumptions, not an immediate cash tax refund.
Which year’s opening retained earnings changes?
If only 2026 statements are presented, the cumulative $35,000 reduction appears in beginning 2026 retained earnings. If 2025 and 2026 are presented together, the comparative presentation must also reflect the change.
For illustration, assume the cumulative pretax difference was $30,000 at January 1, 2025 and rose to $50,000 by December 31, 2025. The comparative presentation is:
| When the effect arose | Presentation |
|---|---|
| Before January 1, 2025 | Reduce beginning 2025 inventory by $30,000; recognize a $9,000 deferred tax asset; reduce beginning retained earnings by $21,000. |
| During 2025 | Increase 2025 cost of goods sold by $20,000, reduce income tax expense by $6,000, and reduce net income by $14,000. |
| Total at January 1, 2026 | $21,000 + $14,000 = $35,000 cumulative reduction in retained earnings. |
The ledger entry and comparative presentation serve different purposes. Recording the cumulative adjustment in the current ledger does not eliminate the requirement to adjust comparative statements. Do not count the same effect twice.
What to disclose
Describe the nature and reason for the change, why the new method is preferable, how it was applied, the effects on affected statement lines and applicable per-share amounts, and the cumulative opening-equity adjustment. Explain any impracticability exception used. See ASC 250-10-50-1.
Changes in accounting estimates
A change in estimate updates an amount because new information, experience, or circumstances become available. Examples include useful lives, residual values, expected credit losses, inventory obsolescence, and warranty obligations.
Apply the change prospectively: recognize its effect in the current period, and in future periods when affected. Do not revise prior financial statements simply because a reasonable estimate later changes.
Worked example: revise an asset’s useful life
On January 1, 2021, XYZ Corp purchased machinery for $1,000,000, with no residual value and a 10-year useful life. After five full years of straight-line depreciation, accumulated depreciation is $500,000. At the start of 2026, new information reduces the total useful life to eight years, leaving three years (2026–2028).
- Remaining carrying amount: $1,000,000 − $500,000 = $500,000.
- Revised annual depreciation: $500,000 ÷ 3 = $166,666.67, approximately.
- Increase from the former annual charge: $166,666.67 − $100,000 = $66,666.67, approximately.
| Account | Debit | Credit |
|---|---|---|
| Depreciation expense | $166,666.67 | — |
| Accumulated depreciation | — | $166,666.67 |
Depreciation for 2021–2025 remains unchanged. Depreciate the remaining carrying amount over 2026–2028, with a final rounding adjustment so total remaining depreciation equals $500,000. Disclose the nature and material current-period effect of the revision, including applicable per-share effects.
Special case: changing depreciation methods
Changing the method used for a long-lived nonfinancial asset—for example, from straight-line to an accelerated method—is a change in estimate effected by a change in accounting principle. Account for it prospectively, justify the new method as preferable, and provide the applicable disclosures. It is not the same as an ordinary retrospective inventory-method change.
Changes in reporting entity
A change in reporting entity means that the financial statements represent a different reporting entity under ASC 250. Examples include certain changes in the entities included in combined statements and qualifying reorganizations under common control.
An ordinary acquisition from an unrelated party is not an ASC 250 reporting-entity change. Do not revise prior years to include an acquired business as though it had always been owned. Apply the relevant acquisition and consolidation guidance. Likewise, a substantive gain or loss of control is not automatically a retrospective reporting-entity change.
Worked example: a transfer under common control
Parent P has controlled operating businesses A and B throughout 2023–2026. On January 1, 2026, P transfers business B to A in a qualifying common-control reorganization. Consider the receiving entity A’s financial statements, not P’s unchanged consolidated group.
If A presents 2024, 2025, and 2026, it presents the receiving reporting entity on a combined basis for those periods, with intercompany amounts eliminated. All those periods fall within common control in this example. Do not extend the example to periods before common control or to an unrelated-party acquisition.
What to disclose
Explain the nature and reason for the change and its effects on income from continuing operations, net income, other comprehensive income, and applicable per-share amounts for the periods presented. The receiving entity’s common-control presentation also requires consideration of ASC 805-50.
Reference: ASC 250-10-20 and 45-21; see the ASC excerpts and common-control discussion in EY’s accounting-changes guide.
Correction of accounting errors
An accounting error can arise from arithmetic mistakes, incorrect application of GAAP, or failure to use facts available when the statements were prepared. Correcting an error is not an accounting change, even though correcting a prior-period error may also require revising comparative information.
Timing and materiality determine the correction
- Current-period error found before statements are issued: correct the affected accounts before issuance.
- Error material to previously issued statements: restate the affected prior periods and adjust opening balances of the earliest period presented for earlier effects.
- Error immaterial to prior periods: also assess the effect of correcting it in the current period. Do not record a catch-up adjustment that would materially misstate current results; revision of comparative information may be necessary.
Materiality involves both amounts and circumstances; a percentage threshold alone is insufficient. Under U.S. GAAP, there is no impracticability exemption for correcting material prior-period errors. The exception for some principle changes must not be carried over to this section.
Worked example: equipment incorrectly expensed
XYZ bought equipment for $100,000 on January 1, 2024 but incorrectly expensed the entire amount. The equipment has a five-year useful life, no residual value, and straight-line depreciation. The material error is discovered at the beginning of 2026, after two full years. Ignore income taxes in this example.
- Correct annual depreciation: $100,000 ÷ 5 = $20,000.
- Accumulated depreciation for 2024 and 2025: $40,000.
- Missing net equipment and cumulative understatement of retained earnings: $100,000 − $40,000 = $60,000.
| Account | Debit | Credit |
|---|---|---|
| Equipment | $100,000 | — |
| Accumulated depreciation | — | $40,000 |
| Retained earnings | — | $60,000 |
The debit restores the equipment’s original cost. The credits establish the depreciation that should already have accumulated and increase retained earnings for the cumulative net income understatement. This entry does not create $60,000 of current-year income.
Restating the comparative information
| Period | Correction |
|---|---|
| 2024 | Remove the incorrect $100,000 expense and recognize $20,000 depreciation: net income increases by $80,000. |
| 2025 | Recognize the omitted $20,000 depreciation: net income decreases by $20,000. |
| Cumulative through December 31, 2025 | Retained earnings increases by $80,000 − $20,000 = $60,000. |
If only 2025 and 2026 are presented, increase beginning 2025 retained earnings by $80,000 for the 2024 effect, then reduce 2025 income by $20,000. Beginning 2026 retained earnings is therefore $60,000 higher. Record the normal $20,000 depreciation for 2026 separately.
Disclose the nature of the error, the effect of correction on each affected financial statement line and applicable per-share amount, and the cumulative opening-equity adjustment. Include tax effects when they are relevant; they are omitted here solely to isolate the correction mechanics.
Common exam mistakes
- New information versus an old mistake: distinguish a reasonable estimate revised today from an estimate that ignored information already available.
- Current ledger versus comparative presentation: a beginning-retained-earnings entry does not remove the need to adjust comparative statements.
- Depreciation method versus inventory method: the former has special prospective treatment; do not classify both mechanically as retrospective principle changes.
- Acquisition versus reporting-entity change: buying an unrelated business does not make its pre-acquisition results part of the acquirer’s historical consolidated results.
- Cash basis versus GAAP: cash-basis statements properly prepared under a special-purpose framework are not automatically erroneous. An error arises when the prior statements were required or claimed to follow GAAP and failed to do so.
- First-time transactions: adopting a method for a genuinely new type of transaction is not necessarily a change from a previously used accounting principle.
U.S. GAAP and IFRS: keep the frameworks separate
This lesson’s main rules and examples use U.S. GAAP. Under IFRS, IAS 8 also distinguishes policies, estimates, and errors, but the detailed requirements differ. In particular, IAS 8 permits an impracticability exception for retrospective correction of prior-period errors; U.S. GAAP does not extend that exception to material error corrections. Read the IFRS Foundation’s IAS 8 overview for the IFRS framework.
Accounting changes and errors: practice quiz
References and further reading
- ASC 250: accounting changes and error corrections, including 250-10-45-5 through 45-10 (principles), 45-17 through 45-20 (estimates), 45-21 (reporting entity), and 45-23 (errors). EY’s August 2026 guide reproduces relevant ASC text and provides further explanation.
- ASC 805-50: transfers of assets or businesses between entities under common control.
- FASB: Revenue Recognition Implementation Q&As — background for the video context note.
- IFRS Foundation: IAS 8 overview — the separate IFRS framework.
Responses