PE48510 | Consideration of Partial Exemption special methods: unsatisfactory methods: background
From HM Revenue & Customs · VAT Partial Exemption Guidance
A partly exempt business must use a ‘method’ to determine the amount of input tax it can recover that relates to its taxable supplies (and certain other supplies that carry the ‘right to deduct’). It has two options
The standard method - a relatively simple calculation prescribed by law.
A special method (PESM) - a bespoke method proposed by the business and approved by HMRC. Before April 2005 it was possible for a PESM to have ‘de facto’ approval. See PE44500 - Consideration of PE methods: De facto approval - for more information on de facto approval including the criteria to be met for de facto approval.
From 1 April 2005 any new PESM must be formally approved in writing.
Any method must be ‘fair and reasonable’. This means it must
produce a fair recovery of input tax, and
be reasonable both for the business to operate and for HMRC to check.