All UK political parties are required every year to confirm with the commission that their details are accurate and pay a pre-registration fee of £25, which the BNP failed to do.
The Electoral Commission said: “The last date a notification can be submitted to the commission is six months after the deadline for submission of a party’s statement of accounts.
“The BNP’s statement of accounts were due on 7 July 2015. Their annual confirmation of registered details was therefore due on or before 7 January 2016.
“The Electoral Commission did not receive the notification by this date and is required by law to remove the BNP from its register of political parties in Great Britain.”
The commission said the BNP, which won two seats in the European parliament in 2009, had failed to meet the annual requirement to submit its registration details on time.