When the Government postponed the 2015 business rates revaluation to 2017, it extended the period over which bills would be based on rateable values in the 2010 rating list. This also extended the period over which alterations to rateable values could be backdated. As a result, under the current arrangements, by March 2018, a business could potentially have received a business rates bill backdated for up to 8 years and ratepayers could have had 7 years in which to challenge the rateable value.
This is an excessively long period of uncertainty for both businesses and local government. Therefore, the Government decided to address this. The Government has now changed the rules so that alterations to rateable values can only be backdated to the period between 1 April 2010 and 1 April 2015 for Valuation Office Agency alterations made before 1 April 2016 and ratepayers' appeals made before 1 April 2015. Regulations implementing this measure were laid on 3 March.
The statutory instrument can be found at the following link: