Change in accounting estimate versus change in accounting principle
Classify accounting principle changes, estimate revisions, and error corrections, then apply retrospective or prospective treatment.
The decision that earns the point
Classify the item before measuring it
A change in accounting principle generally changes from one accepted accounting principle to another and is applied retrospectively unless impracticable or specific transition guidance applies. A change in accounting estimate results from new information and is applied prospectively. A material error correction is a prior-period adjustment and is not an estimate change.
Exam use
FAR can give you a depreciation revision, inventory-method change, new valuation input, or discovered mistake and require the change type, affected periods, retained-earnings treatment, and disclosure.
Your scratch-paper plan
Solve it in three moves
- 1
Identify what changed
Ask whether the entity changed the accounting principle, revised an estimate using new information, or corrected an error in prior accounting.
FASB ASC 250: Accounting Changes and Error Corrections - 2
Match the transition method
Use retrospective application for a principle change and prospective recognition for an estimate change, subject to the authority's stated exceptions.
FASB ASC 250: Accounting Changes and Error Corrections - 3
Protect prior-period correction
Restate material errors in prior-period statements presented and adjust opening balances for the earliest period presented when required.
FASB ASC 250: Accounting Changes and Error Corrections
Worked problem
Work the facts before choosing the answer
Equipment cost $120,000 with no residual value and was depreciated straight-line over six years. After two years, new operating evidence changes total expected life to eight years. Separately, the entity elects to change inventory accounting from weighted average to FIFO because FIFO is preferable.
CPAPass exam analysis using the stated assumptions
Show the work
After two years, accumulated depreciation is $40,000 and carrying amount is $80,000. The life revision is an estimate change applied prospectively over six remaining years, producing about $13,333 annual depreciation. The inventory-method change is a principle change and is applied retrospectively unless impracticable or transition guidance says otherwise.
Rule source: FASB ASC 250: Accounting Changes and Error CorrectionsAnswer
Do not revise the first two years for the useful-life estimate. Use about $13,333 depreciation in each remaining year under unchanged assumptions, while recasting comparative inventory periods and the earliest opening equity balance for the principle change as required.
Rule source: FASB ASC 250: Accounting Changes and Error CorrectionsDo it now
Test the same decision with a fresh question
Start with free FAR practice. Create an account only when you want the 5-day no-card CPAPass trial and continued section practice.
The trap and the repair
Common trap
Calling every change prospective because management made a new choice can hide a principle change or an error that belongs in prior-period reporting.
Repair
Name the underlying accounting method or estimate, identify whether new information or a prior mistake caused the change, and only then choose the transition method.
Authority and scope boundary
FASB ASC 250 controls accounting changes and error corrections. A change in depreciation method is treated as a change in estimate effected by a change in principle, while a change in useful life is an estimate revision. This route does not own the mechanics of each underlying inventory or depreciation model.
2026 Uniform CPA Examination Blueprints and FASB ASC 250: Accounting Changes and Error Corrections were reviewed on 2026-08-14. Check a newer authority when the effective date or facts change.
Change-type decision tree
The change type determines which periods move
Classify the cause before adjusting the numbers. Similar-looking current-year entries can have very different comparative-statement effects.
| Change type | Transition treatment | Illustrative result | Authority |
|---|---|---|---|
| Accounting principle | Retrospective unless impracticable or specific transition applies | Recast comparative periods and adjust earliest opening equity as needed | FASB ASC 250: Accounting Changes and Error Corrections |
| Accounting estimate | Prospective in the period of change and future periods affected | Revised useful life changes current and future depreciation only | FASB ASC 250: Accounting Changes and Error Corrections |
| Estimate effected by principle | Treat as an estimate change | A depreciation-method change is prospective | FASB ASC 250: Accounting Changes and Error Corrections |
| Material prior-period error | Retrospective restatement of prior periods presented | Correct comparative amounts and earliest opening balances | FASB ASC 250: Accounting Changes and Error Corrections |
After a miss
Repair an accounting-change classification miss
- 1
Write principle, estimate, or error beside the fact that caused the change before calculating an adjustment.
- 2
Rework the equipment example after discovering that the original six-year life came from a spreadsheet error rather than new information.
- 3
Answer a fresh FAR accounting-change question and record both the classification and the exact periods affected.
Your exam workflow
- Step 1Identify the requirementAsk whether the entity changed the accounting principle, revised an estimate using new information, or corrected an error in prior accounting.FASB ASC 250: Accounting Changes and Error Corrections
- Step 2Classify the factsUse retrospective application for a principle change and prospective recognition for an estimate change, subject to the authority's stated exceptions.FASB ASC 250: Accounting Changes and Error Corrections
- Step 3Apply the authorityRestate material errors in prior-period statements presented and adjust opening balances for the earliest period presented when required.FASB ASC 250: Accounting Changes and Error Corrections
- Step 4Check the outputDo not revise the first two years for the useful-life estimate. Use about $13,333 depreciation in each remaining year under unchanged assumptions, while recasting comparative inventory periods and the earliest opening equity balance for the principle change as required.FASB ASC 250: Accounting Changes and Error Corrections
Keep the next step narrow
Quick questions
What is the key rule?
A change in accounting principle generally changes from one accepted accounting principle to another and is applied retrospectively unless impracticable or specific transition guidance applies. A change in accounting estimate results from new information and is applied prospectively. A material error correction is a prior-period adjustment and is not an estimate change.
How can this topic be tested on the CPA Exam?
FAR can give you a depreciation revision, inventory-method change, new valuation input, or discovered mistake and require the change type, affected periods, retained-earnings treatment, and disclosure.
What mistake most often changes the result?
Calling every change prospective because management made a new choice can hide a principle change or an error that belongs in prior-period reporting. Name the underlying accounting method or estimate, identify whether new information or a prior mistake caused the change, and only then choose the transition method.
Where should I practice the decision?
After the worked example, open the FAR free-practice link and work a fresh question that tests the same decision. If the miss depends on Depreciation methods, review that handoff before trying another set.