Useful Life

What Is Useful Life?

The estimate is about the entity rather than about the equipment. A machine capable of running for twenty years has a useful life of eight if the business intends to replace it at eight, and the depreciation follows that intention rather than the engineering. This is why two companies operating identical assets can properly depreciate them over different periods without either being wrong.

Schedule II supplies indicative lives by class, which most companies adopt because doing so is straightforward and defensible. Departing from them is permitted where a technical assessment supports a different period, and the assessment then has to exist as a document rather than as an assertion. The estimate is not fixed for the asset's life either: where expectations change materially, through heavier usage, a change in the production plan or a technological shift, the remaining life is revised and the charge adjusted prospectively rather than restated. Residual value is set alongside it, and a life estimate paired with an optimistic residual understates the annual charge twice over.

Useful Life Under Indian Law

Position: the useful lives set out in the schedule are indicative rather than binding. A company may adopt a longer or shorter life where it is justified on technical grounds.

• Where a different life is used, the justification has to be supported by a technical assessment and disclosed in the financial statements. The departure is permitted; an undisclosed and unsupported departure is not.
• Source: the depreciation schedule to the Companies Act 2013, Part A.
• Note: adopting the indicative life is the simplest defensible position and is what most companies do. The question an auditor asks is not why the schedule was followed but, where it was not, what assessment supports the alternative and where that assessment is recorded.

How Useful Life Applies to a Fixed Asset Register

The life is a field held against every line, and how it is stored decides whether the register can be checked.

• It belongs on the line itself rather than being applied by class from a separate schedule, so any individual charge can be recomputed without rebuilding the whole calculation.
• It is paired with a residual value, and the depreciable amount is the difference, which means an optimistic residual quietly depresses the charge as effectively as a long life does.
• Where the figure departs from the indicative schedule, the technical justification is referenced against the line rather than filed elsewhere.
• Revisions are recorded with their effective date and the reason, since the remaining balance is spread forward rather than restated backwards.
• A register holding only an accumulated figure, with no life against the line, cannot be tested at all.

How Useful Life Works in Practice

1. At the point of capitalisation somebody estimates how long the business expects to keep drawing service from the item, weighing how hard it will be run, how fast it will wear, how soon it may be superseded and any legal ceiling on its operation.

1. The Companies Act schedule sets out suggested spans for each category, and most businesses simply take them. Where a different period is used, a technical assessment supporting it is documented at the time.

1. A residual value is estimated alongside, and the depreciable amount is cost less that residual.

1. The charge is computed and posted each period on the chosen method, applied consistently.

1. The estimate is reviewed rather than fixed. Where expectations change materially, because equipment is worked harder, output plans are redrawn or technology moves, the balance still on the books is spread over the new remaining period going forward, without restating any period already closed.

Useful Life: A Worked Example

A Chakan press shop runs three shifts and sets lives against actual working rather than a table.

The second and third rows are where the judgement sits. Schedule II lives are indicative rather than prescribed, so a company may adopt a different life provided the reason is documented and disclosed. Triple-shift working genuinely consumes a machine faster, and a mould rated for a finite number of strokes is exhausted by output rather than by time. What cannot happen is a shorter life chosen because it suits the tax or profit position, with no technical support. At verification the question asked is not whether the life differs from the schedule but whether the file explains why.

Common Mistakes With Useful Life

The estimate concerns the business's own expected use, and errors follow from forgetting that.

• Adopting the indicative schedule lives without considering whether they describe your actual usage, particularly where equipment runs multiple shifts.
• Departing from them without documenting the technical assessment, which leaves the shorter or longer life unsupported when it is questioned.
• Never revising the estimate, though running equipment harder, reshaping the output plan, or a shift in technology each call for the remaining charge to be recomputed.
• Pairing a long life with an optimistic residual value, which depresses the yearly figure from both ends at once.
• Restating prior periods when the estimate changes, rather than adjusting the remaining charge prospectively as a change in estimate requires.
• Applying one life across a class containing equipment used very differently between sites, which averages away the distinction the estimate exists to capture.

Related Stock Audit Terms

Splitting an asset into parts with different lives changes the whole calculation, so componentisation is the entry to read next. Every other term in this cluster is listed in the stock audit glossary, grouped by the part of the work it belongs to.