“Section FRS3300 of the FRS guidance states ‘The policy is to refuse retrospection where the business has already calculated its VAT for the period(s) using a different accounting method. The reason for this is that the FRS exists to simplify VAT accounting and record keeping for small businesses, so that they are able to spend less time on VAT. Section FRS3300 of the guidance also states ‘In line with the rationale of the scheme, the fact that a business will pay, or would have paid, less tax, is not sufficient reason to authorise retrospective use of the FRS.’ Where a trader has already calculated their VAT liability using normal accounting, retrospective use of the Flat Rate Scheme would be authorised only where justified by exceptional circumstances.”
“I comment that this appears to me to be an entirely rational policy, which reflects the simplification policy of the flat-rate scheme itself. If a taxpayer has already accounted for VAT in the past on the normal basis, and in accordance with the general law then in force, there is no way in which retrospective admission to the scheme can simplify the accounting exercise that he has already carried out. In such cases, the only likely motive for seeking retrospective entry is that the taxpayer would, in fact, have ended up paying less tax had he been a member of the scheme, and that is indeed the position so far as Mr Burke is concerned.”