Accounting Reference Date (ARD) Change This submission can be used to change the accounting reference date relating to either the current or immediately previous accounting period. You may not change a period for which the accounts are already overdue. You may not extend a period beyond 18 months unless the company is in administration. You may not extend any period more than once in five years (five accounting periods) unless you have provision to do so. Your Details Name First name Surname * Email * Phone * Order Details Company Name * Company Number * Companies House Authentication Code This is a 6 character code you can obtain from your company formation agent. * New Accounting Reference Date (dd/mm/yyyy) Please enter the date (in the format dd/mm/yyyy) you want the accounting period to end *