Starting a business in the UK involves working through a small number of essential steps - choosing a legal structure, registering with the relevant authorities, and putting the right foundations in place before trading. Getting these basics right from the outset avoids costly corrections later and gives you the confidence to focus on building your business.
The process begins with choosing your business structure: sole trader, limited company, or partnership. Sole traders must register with HMRC for Self Assessment by 5 October after the end of the tax year in which they began trading. When you register a limited company through Companies House, you are usually set up for Corporation Tax automatically at the same time; a separate HMRC notification is not normally required unless the company is dormant. Limited companies require a dedicated business bank account; sole traders are not legally obliged to have one, though keeping finances separate is strongly recommended for bookkeeping and tax purposes and may require specific licences or insurance depending on their sector. For most small businesses, the registration process is straightforward and can be completed online.
The most common question at this stage is whether to operate as a sole trader or form a limited company — both are legitimate paths, and the right choice depends on your individual circumstances. Given the tax and liability implications, it is worth speaking to an accountant before deciding. Our guides to business structure and company registration walk through each option in detail for UK founders.