I took this off the HMRC Website: "If you are an Accountancy Service Provider then the Money Laundering Regulations 2007 will affect you. The new Regulations come into force on 15 December this year. What is an Accountancy Service Provider? Accountancy Service Providers (ASPs) is the term used by HMRC for auditors(a), external accountants(b) and tax advisers(c) who are not already supervised by the FSA or one of the professional bodies listed in the Regulations. An auditor is any person eligible for appointment as a company auditor under section 25 of the Companies Act 1989(a) or article 28 of the Companies (Northern Ireland) Order 1991(b) who by way of business provides audit services. An accountant is any person who by way of business provides accountancy services. A tax adviser is any person who by way of business provides advice about the tax affairs of another person. If you provide bookkeeping services you come under b - (I got told by a bookkeeper that they weren't an accountant - but b, classes bookkeepers as accountants as they provide accountancy services as accountancy services includes bookkeeping!)" If you provide bookkeeping services after 15 December 2007, and are not regulated under this act by one of the professional bodies (IAB is just one of the many), then you have to register (and pay a fee) with the HMRC to be regulated by them. There will be a transitional period of a couple of months, because I don't think the HMRC is ready yet to accept direct registration!