Key Takeaways
- Residual value reduces the depreciable amount, so overestimating it directly understates the annual depreciation charge and overstates carrying amount.
- IAS 16.51 requires the residual value to be reviewed at least at each financial year-end, with any change treated as a change in accounting estimate under IAS 8.
- For most plant and machinery in European industrials, residual value sits between 0% and 15% of original cost, depending on the secondary market for the asset.
- An asset's residual value can increase to the point where the depreciable amount is zero, suspending depreciation until the estimate reverses.
What is Residual Value?
IAS 16.6 defines residual value as the estimated amount that an entity would currently obtain from disposal of the asset, after deducting the estimated costs of disposal, if the asset were already of the age and in the condition expected at the end of its useful life. The definition anchors the estimate to current prices, not projected future prices. That distinction trips practitioners up: you are estimating what the asset would fetch today in its end-of-life condition, not what it might fetch in ten years.
The depreciable amount equals cost (or revalued amount) minus residual value (IAS 16.50). A higher residual value means a lower annual depreciation charge. IAS 16.51 requires the entity to review both residual value and useful life at least at each financial year-end. If expectations differ from previous estimates, the entity accounts for the change prospectively as a change in estimate under IAS 8.36. The auditor's job under ISA 540.13(b) is to evaluate whether the data and assumptions supporting the residual value estimate are appropriate for the method used, particularly when management sets a non-zero residual value for assets that typically have none.
Worked example: Hoffmann Maschinenbau GmbH
Client: German engineering company, FY2025, revenue EUR 28M, HGB reporter also preparing an IFRS reporting package for its parent. Hoffmann purchases a CNC milling machine for EUR 640,000 in January 2022, with an estimated useful life of eight years.
Step 1 — Estimate residual value at initial recognition
Hoffmann's procurement team obtains resale data from two used-machinery dealers and a manufacturer buyback programme. Five-year-old CNC machines of this model and comparable condition sell for EUR 80,000 to EUR 110,000. After deducting estimated decommissioning and transport costs of EUR 15,000, Hoffmann sets the residual value at EUR 80,000.
Step 2 — Calculate the depreciable amount and annual charge
Depreciable amount equals EUR 640,000 minus EUR 80,000, giving EUR 560,000. On a straight-line basis over eight years, the annual depreciation charge is EUR 70,000.
Step 3 — Review at 31 December 2025 (end of year four)
Updated dealer quotes show that comparable machines now sell for EUR 55,000 to EUR 70,000 due to a technology shift toward five-axis models. After disposal costs, the revised residual value is EUR 50,000. The remaining useful life is four years.
Step 4 — Recalculate the depreciation charge from 2026 onward
After four years of depreciation at EUR 70,000 per year, accumulated depreciation is EUR 280,000. Carrying amount at 31 December 2025 is EUR 360,000. Revised depreciable amount is EUR 360,000 minus the new residual value of EUR 50,000, giving EUR 310,000. Over the remaining four years, the revised annual charge is EUR 77,500.
The revised annual depreciation of EUR 77,500 is defensible because both the original and revised residual values trace to observable resale data, the disposal cost estimate is supported, and the prospective treatment of the change follows IAS 8.36.
Why it matters in practice
Teams commonly set residual value at zero for all property, plant, and equipment without assessing whether a secondary market exists. IAS 16.53 acknowledges that residual value is often insignificant, but the standard requires an active assessment. ISA 540.13(a) requires the auditor to evaluate whether the entity's method for the estimate is appropriate. A blanket-zero policy without asset-by-asset (or class-by-class) analysis does not meet either requirement when the assets have demonstrable resale value.
The year-end review required by IAS 16.51 is frequently omitted or performed only at initial recognition. When residual values are not reassessed, the depreciable amount drifts from economic reality. The FRC's thematic review of depreciation practices has flagged insufficient evidence of annual reassessment as a recurring finding in the fixed-asset audit area.
Residual value vs. salvage value
| Dimension | Residual value (IAS 16 / IFRS) | Salvage value (US GAAP / ASC 360) |
|---|---|---|
| Definition basis | Current disposal proceeds in end-of-life condition, less disposal costs (IAS 16.6) | Estimated fair value at the end of useful life, sometimes gross of disposal costs depending on policy |
| Price reference | Anchored to current prices, not projected future prices | May incorporate expected future prices depending on the entity's methodology |
| Review frequency | At least annually under IAS 16.51 | ASC 360 requires review when events indicate a change; no explicit annual mandate |
| Change treatment | Prospective change in estimate under IAS 8.36 | Prospective change under ASC 250 |
The distinction matters on cross-border engagements where an IFRS subsidiary reports to a US GAAP parent. The IFRS subsidiary's residual value, anchored to current prices, may differ materially from the salvage value the parent expects in its consolidation, creating an adjustment that the group auditor needs to quantify.
Related terms
Frequently asked questions
How do I audit a residual value estimate?
Obtain management's source data (resale quotes, auction results, manufacturer buyback terms) and compare the estimate to observable market prices for assets of similar age and condition. ISA 540.18 requires the auditor to evaluate whether management's assumptions are reasonable. For specialised assets without a liquid secondary market, consider engaging a valuation expert or requesting an independent appraisal.
Can residual value be higher than original cost?
In theory under IAS 16, yes. If an entity uses the revaluation model and the revalued amount increases, the residual value could approach or equal the carrying amount, reducing the depreciable amount to zero. IAS 16.54 states that in such cases depreciation is zero until the residual value subsequently decreases below the carrying amount. This situation is rare but arises with certain land-adjacent assets or assets in appreciating markets.
Does residual value apply to intangible assets?
IAS 38.100 presumes the residual value of an intangible asset is zero unless a third party has committed to purchasing the asset at the end of its useful life, or an active market exists for that type of asset. The presumption can be rebutted, but in practice intangible assets with non-zero residual values are uncommon.