Chapter 2: Qualitative characteristics of financial information and the fundamental bases of accounting
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3.2 Historical cost accounting
Financial statements are prepared under the historical cost accounting convention.
Under this convention, most assets, liabilities and items of revenue and expense are
recorded and reported at their actual historical cost.
International accounting standards permit the use of other bases of valuation, and
sometimes require the use of a different basis. Even so, the term ‘historical cost
accounting’ is applied to the normal method or basis for preparing financial
statements.
Advantages of historical cost
Using historical cost to give a money value to assets and the cost of sales has certain
advantages.
It is objective. It is an amount of money that has actually been paid, or a cost that
can be measured from historical data. There is no element of judgement or
opinion in the valuation.
It is simple. Unless assets are valued at historical cost, it becomes necessary to re-
value them regularly and change their current value (replacement cost or
realisable value) or present value.
It seems logical. It seems logical to suppose that if an item is sold for $1,000 and
its historical cost was $700, a profit of $300 has been made.
Disadvantages of historical cost
Unfortunately, there are some important disadvantages with historical cost
accounting, especially in a period of high price inflation.
When price inflation means that the current value or replacement cost of assets is
continually rising, historical cost would cease to represent a realistic value for
some long-term assets (non-current assets). An obvious example is land and
buildings, which are often used for many years and whose value tends to rise
over time. For example suppose that historical cost is used to value buildings
purchased in 1970, 1985, 2000 and 2009. Their total historical cost would not
represent their actual value, and the historical cost of each asset would not be
comparable because they were bought at different times.
When the rate of inflation is very high, the historical cost of sales might not be a
suitable basis for measuring the cost of sales. For example suppose that a retail
company sells an item for $10,000 which has a historical cost of sale of $6,000,
but to replace the item that as been sold from the supplier would now cost
$6,500. It could be argued that the profit on the transaction is only $3,500 (and
not $4,000) if the company wishes to continue trading at the same level in ‘real
terms’.
The conclusion is that historical cost accounting, particularly in a period of high
inflation, tends to:
under-state the value of assets, and
under-state the cost of sales and so over-state profits.