If the financial year ending in the year of taxation extends over a period of more or less than twelve months, the tax is nevertheless assessed on the basis of the results of that financial year.
If no balance sheet is drawn up in the course of any year, the tax due in respect of the same year is assessed on the profits of the period elapsed since the end of the last taxed period or, in the case of a new business, from the commencement of operations until 31 December of the year in question. These same profits are then deducted from the results of the balance sheet in which they are included.
Where successive balance sheets are drawn up in the course of the same year, the results are added together for the purposes of calculating the tax due in respect of that year.