Last reviewed: July 2026.
Historical cost accounting measures an asset or liability using information derived from the original transaction, adjusted for later consumption, impairment, payments or other changes required by accounting standards. It remains widely used because transaction prices are often observable and verifiable.
Historical cost is not simply “keep the original number forever.” Depreciation, amortisation, impairment, inventory write-downs, effective interest and derecognition can change the carrying amount substantially.
Historical cost in the Conceptual Framework
The IFRS Conceptual Framework groups measurement bases into historical cost and current value. Historical-cost information is based, at least partly, on the price of the transaction or event that created the asset or liability.
The appropriate basis depends on relevance, faithful representation and the characteristics of the item and its contribution to cash flows.
How historical cost works for assets
| Asset | Initial historical cost | Common later adjustments |
|---|---|---|
| Property, plant and equipment | Purchase price and directly attributable cost | Depreciation, impairment, component replacement and disposal |
| Inventory | Purchase, conversion and other qualifying cost | Cost allocation, write-down to NRV and expense when sold |
| Finite-life intangible asset | Purchase or qualifying development cost | Amortisation and impairment |
| Financial asset at amortised cost | Fair value plus qualifying transaction costs | Effective interest, cash receipts and expected credit losses |
How historical cost works for liabilities
A liability measured using a historical-cost approach is updated for fulfilment, interest, payments and changes required by the relevant Standard. Amortised-cost borrowings, for example, use the effective interest method rather than remaining at original proceeds.
Worked property example
Equipment costs 120,000 CU, including delivery and installation. It has a 10-year useful life, no residual value and straight-line depreciation.
- Initial cost: 120,000 CU
- Annual depreciation: 12,000 CU
- Carrying amount after three years: 84,000 CU
The carrying amount is historical cost adjusted for consumption, not a current market valuation.
Worked inventory example
Inventory costs 50,000 CU but its net realisable value falls to 43,000 CU. IAS 2 requires a 7,000 CU write-down.
Historical cost therefore provides the starting point, while the lower-of-cost-and-NRV rule prevents overstatement.
Review the IAS 2 inventory accounting guide.
Advantages of historical cost
- transaction prices are usually supported by invoices and contracts;
- the method is understandable and operationally practical;
- verified costs support audit trails and accountability;
- less frequent valuation can reduce cost and subjectivity;
- realised margins can be compared with recognised transaction costs.
Limitations of historical cost
- old carrying amounts may differ greatly from current economic values;
- inflation reduces comparability between assets acquired at different dates;
- asset age can distort return and turnover ratios;
- internally generated value may not appear as an asset;
- historical transaction prices may become less relevant after major market changes.
Historical cost and fair value
Fair value is a current-value basis based on an orderly transaction between market participants at the measurement date. Historical cost and fair value answer different questions.
Fair value can improve current relevance, while historical cost can provide a clearer transaction trail. Standards select or permit the basis according to the item and reporting objective.
Cost model and revaluation model
IAS 16 permits a cost model or revaluation model for classes of property, plant and equipment when the criteria are met. A revaluation policy must be applied to the whole class and kept sufficiently current.
Compare with the IAS 16 revaluation guide.
Historical cost and depreciation
Depreciation allocates the depreciable amount over the pattern of consumption. It is not intended to update an asset to market value.
Useful lives, residual values and methods must still be reviewed. See the depreciation methods guide.
Historical cost and impairment
Impairment requirements reduce carrying amounts when recoverability falls below the recorded amount. A historical-cost model does not permit management to ignore evidence of loss.
Inflation and mixed measurement
General-purpose financial statements commonly use a mixed measurement system. Some items use historical or amortised cost, while others use fair value, current cost or fulfilment value.
In hyperinflationary economies, IAS 29 introduces additional restatement requirements.
Effect on profitability ratios
Older assets with low carrying amounts can increase asset turnover and return on capital employed even when operational performance has not improved. Analysts should examine asset age, revaluation policy and replacement needs.
Accounting policy and consistency
Entities should apply measurement policies consistently to similar transactions unless an IFRS Standard requires or permits a change. A policy change must be justified and accounted for under IAS 8.
Read the accounting policies and estimates guide.
Disclosure
Notes should identify the measurement bases used and explain material policy choices, estimation uncertainty and changes. Clear disclosure helps users understand where historical cost, fair value and other bases are applied.
The Conceptual Framework guide explains the role of measurement in useful financial information.
Common mistakes
- assuming historical cost always equals original invoice price;
- ignoring directly attributable costs or rebates;
- using depreciation as a market valuation adjustment;
- failing to recognise impairment or NRV write-downs;
- mixing cost and revaluation models within one asset class;
- comparing ratios without considering asset age and inflation.
Key takeaway
Historical cost begins with transaction information and is updated according to the applicable Standard. It offers verifiability and discipline, but users should understand its limits when current values and prices have changed.
Official references: Conceptual Framework for Financial Reporting, IAS 16 Property, Plant and Equipment, and IAS 16 supporting material.