Asset Impairment and Depreciation before the 15th Century

This paper investigates impairment and depreciation accounting in the 13th to 15th century. It finds that the first known instance of impairment accounting was in 1321, while for depreciation, it was 1399 not, as has previously been claimed, 1299. The study demonstrates the difference in approach at that time between the two forms of adjustment and shows that impairment was the original form of adjustment for reduction in asset values, a form that was applied in situations where physical assets had been lost, or deteriorated, or devalued over the reporting period. In contrast, depreciation was algorithmic, linked to a time-based straight-line depreciation charge equivalent to 10 percent per annum. These findings not only relocate recognition of the emergence of depreciation provisions to the end of the 14th century but, also, from France to Spain. However, in both cases, in Italian firms with Italian accountants.