Plenty of businesses run perfectly well on a spreadsheet and a shoebox of receipts. The question is not whether you can do your own accounts — it is whether doing them is still the best use of your time. These are the points at which the answer usually changes.
1. You are about to cross the VAT threshold
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VAT registration changes how you invoice, what you can reclaim, and how often you file. Crossing the threshold without noticing is one of the most common and most expensive mistakes a growing business makes, because HMRC will backdate it.
2. You are taking on your first employee
Payroll brings PAYE, National Insurance, pension auto-enrolment and real-time reporting to HMRC. Every one of those has a deadline and a penalty attached.
3. You are switching from sole trader to limited company
A limited company files statutory accounts, a corporation tax return and a confirmation statement, and pays you through a mix of salary and dividends. The tax saving is real, but only if the structure is set up properly.
4. You are spending evenings on bookkeeping
Work out your hourly rate, then multiply it by the hours you spend on the books. If that number is bigger than a bookkeeper’s fee, you are paying a premium for the privilege of doing your own admin.
5. You do not know if you are profitable
Money in the bank is not profit. If you cannot say which products, clients or months actually make money, you are steering blind — and that is what management accounts are for.
6. HMRC has been in touch
An enquiry, a penalty notice or a compliance check is not the moment to learn tax law. Get someone who has handled one before, and do it before you reply.
7. You are raising money or selling
Investors, lenders and buyers all want clean, credible numbers. Tidy accounts prepared by a qualified firm are the difference between a smooth process and a discount on your valuation.
What it costs
For most small businesses, ongoing support runs £75–£500 a month depending on turnover, VAT and payroll. Compare that with the cost of one missed deadline, and the maths usually makes itself.