## Documentation Index Access the complete documentation index at: https://www.zoho.com/uk/books/kb/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # What is the difference between Standard period type and Calendar period type? The Period Type determines how your quarterly reporting obligations are structured throughout the year. * **Standard Period Type:** Your reporting periods follow the UK tax year (6 April to 5 April). Each quarter ends on the 5th of the month, covering 6 Apr to 5 Jul, 6 Jul to 5 Oct, 6 Oct to 5 Jan, and 6 Jan to 5 Apr. * **Calendar Period Type:** Your reporting periods follow the calendar year, with each quarter ending on the last day of the month, covering 1 Jan to 31 Mar, 1 Apr to 30 Jun, 1 Jul to 30 Sep, and 1 Oct to 31 Dec.