Capital Allowances are slightly different to everyday expenses. HMRC understands that a business will have to purchase items to use on a daily basis as ‘general expenses’ – this could be paper for the printer, stock to sell (e.g. books) or stamps for postage.
Capital Allowances are seen as something ‘bigger’ which would usually last longer than a year. This could be a new computer or office furniture. Capital Allowances can be declared separately to your main income / expenses figures which are provided to HMRC.
However, if you’re a sole trader and have income of £150,000 or less, you can use the cash basis system, which means these are classed as standard expenses.
If you’re VAT registered or have a higher income, speak with an accountant to understand your options.
Further reading for Capital Allowances: