Make sure to keep track of all invoices issued and received, as well as bank statements and expense receipts. If you use a vehicle for business purposes, keep a log of business mileage. For each project, record the time spent, materials used, and all associated costs. Additionally, remember to keep contracts and project documentation, as these may be relevant for tax purposes, especially for long-term projects. If you are VAT-registered, maintain detailed VAT records. Store records for a minimum of six years, as HMRC can review records from that far back (or up to 20 years in cases of suspected fraud). Consider using cloud-based accounting software for easy record-keeping and to comply with Making Tax Digital requirements. It’s also crucial to regularly back up digital records. Good records not only aid in tax compliance but can also offer valuable insights for business planning.