Prospective does not mean “future years only.” If new claims experience arrives in September and changes the year-end warranty estimate, the current reporting period reflects the supported revision. Future periods do so only to the extent they are affected.
The schedule begins with the recognized carrying amount at the change date, then applies the revised assumption or allocation. It retains the evidence that supports the new information and separately tests whether any earlier fact was overlooked. A prospective worksheet cannot convert an error into an estimate change merely by starting with the booked balance.
Begin at the supported change date
ASC 250-10-45-17 places an estimate change in the period of change, future periods, or both, based on which periods the change affects. It also bars restatement of earlier periods for the estimate change.
If a revised warranty rate is supported before the annual statements are issued and changes the year-end estimate, the current annual period reflects it. If a useful-life revision occurs on July 1, the revised allocation begins with the carrying amount and remaining benefit pattern on that date. The exact partial-period convention must come from the entity's supported policy and facts.
Put the concept to work
Understand this concept
- Explain why prospective treatment preserves historical amounts but includes the current period when the new information affects it.
Apply this concept
- Build a current-and-future schedule from the supported carrying amount and revised inputs at the change date.
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Build on these ideas
- Change in accounting estimate — Understand
To understand this concept: Helpful. Estimate changes provide the primary prospective application.
- Prospective application — Understand
To apply this concept: Required. The schedule begins at the correct date.
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Use this idea next
- Prospective application — Apply
Required level here: understand. Required. The schedule begins at the correct date.