Every business must keep records of the transactions it makes, to comply with rules set by HM Revenue & Customs (HMRC).
ICAEW chartered accountant Nila Khan explains why it's so important.
Record-keeping and the law
Whether you're trading as a sole trader or limited company at the end of each financial year, you need to complete a tax return in the required format and send it to HMRC. Sole traders return figures on a Self Assessment tax return, while companies will complete a Corporation Tax return.
In both cases, HMRC require the figures declared on these tax returns to be supported by proper documentation. As a result, by law, your business must keep records that show the transactions it has undertaken.
As a minimum, your business should keep for six years copies of:
Keeping these records is also vital when it comes to monitoring your cash flow and staying on top of your debtors (the customers who owe you money).
Enquiries into your tax return
HMRC can select your tax return for an enquiry or a check. This means it's looking for verification that there are documents to support the transactions you've entered on your tax return.