In the United Kingdom, the term fiscal year is sometimes used to refer to the tax year, the year used by statute for tax reporting by individuals, and is not commonly used for accounting years used by companies. The equivalent of fiscal year applied to companies is the accounting reference period (required under the Companies Acts), which usually forms the basis of the accounting period used for tax purposes.
A popular use of a non-calendar year as the fiscal year involves retailers. In many countries, at the end of December, levels of inventory, receivables and payables will be higher than at other month ends and consequently more complex and time-consuming to measure accurately. Therefore, retailers commonly use a month other than December to end their fiscal year. January may be chosen as the last month of the fiscal year because activity levels are likely to be closer to normal by the end of January.
In addition, many companies find that it is convenient for purposes of comparison and for accurate stock taking to always end their fiscal year on the same day of the week, where local legislation permits. Thus some fiscal years will have 52 weeks and others 53. Major corporations that adopt this approach include Cisco Systems and Tesco.
In the United Kingdom, a number of major corporations that were once government owned, such as BT Group and the National Grid, continue to use the government's financial year, which ends on the last day of March, as they have found no reason to change since privatisation.
Nevertheless, for about 65% of publicly traded companies in the United States and for a majority of large corporations in the UK and elsewhere, except in Australia, New Zealand and Japan, the fiscal year and calendar year are identical.
The U.S. government's fiscal year begins on October 1 of the previous calendar year and ends on September 30 of the year with which it is numbered. Prior to 1976, the fiscal year began on July 1 and ended on June 30. The Congressional Budget and Impoundment Control Act of 1974 stipulated the change to allow Congress more time to arrive at a budget each year, and provided for what is known as the "transitional quarter" from July 1, 1976 to September 30, 1976. As stated above, the tax year for a business is governed by the fiscal year it chooses.
The Australian government's fiscal year begins on July 1 and concludes on June 30 of the following year. This applies for personal income tax and the federal budget, and most companies are required to use it as their own.
The United Kingdom, the fiscal year runs from April 6 to April 5. United Kingdom corporation tax is charged by reference to the government's financial year, but companies can adopt any year as their accounting year: if there is a change in tax rate, the taxable profit is apportioned to financial years on a time basis.
In the UK, the tax year (which governs liability to personal income tax and capital gains tax) runs from April 6 to April 5. This reflects the old ecclesiastical calendar, with New Year falling on March 25 (Lady Day), the difference being accounted for by the eleven days "missed out" when Great Britain converted from the Julian Calendar to the Gregorian Calendar in 1752 (the British tax authorities, and landlords were unwilling to lose 11 days of tax and rent revenue, so under provision 6 (Times of Payment of Rents, Annuities, &c.) of the Calendar (New Style) Act 1750, the 1752–3 tax year was extended by 11 days). From 1753 until 1799, the tax year in Great Britain began on 5 April, which was the "old style" new year of 25 March. A 12th skipped Julian leap day in 1800 changed its start to 6 April. It was not changed when a 13th Julian leap day was skipped in 1900, so the tax year in the United Kingdom is still 6 April.
Ireland also used the year ending April 5 until 2001 when it was changed, at the request of Finance Minister Charlie McCreevy, to match the calendar year (the 2001 tax year was nine months, from April to December).
In some jurisdictions, particularly those that permit tax consolidation, companies that are part of a group of businesses must use nearly the same fiscal year (differences of up to three months are permitted in some jurisdictions, such as the U.S. and Japan), with consolidating entries to adjust for transactions between units with different fiscal years, so the same resources will not be counted more than once or not at all.