Two businesses, same size, same trade. One pays an accountant a fixed amount every month. The other pays once a year, in a single larger bill, for accounts and a tax return. Both will tell you they have an accountant. What they have is quite different.
The year-end model looks backwards
Year-end only engagement is exactly what it sounds like. Once a year you hand over your records, and the accountant turns them into statutory accounts and tax filings. It is history-writing: accurate, necessary, and finished months after the events it describes. If a problem was growing all year, you find out when the year is already closed. For a stable business with simple affairs and an owner who keeps decent records, this is genuinely all that is needed, and it is the cheaper option.
The subscription model watches as you go
A monthly package typically bundles bookkeeping or bookkeeping review, VAT returns where relevant, payroll for a small team, software subscription, and the year-end work rolled in. The better ones add the thing that is hard to price: someone looking at your numbers while they are still current, who notices that margins slipped in the spring rather than the following February. With Making Tax Digital pushing record-keeping into software and towards more frequent reporting, this model is steadily becoming the default for VAT-registered businesses.
The honest caveat is that a subscription can also be a way of charging more for automation you could run yourself. Software already fetches bank transactions and drafts the categorisation. If the monthly fee is mostly for that, you are overpaying.
Questions that separate the two properly
Ask any firm quoting a monthly fee to walk through what happens in a month where nothing goes wrong. If the answer is essentially reconciliation and a VAT return, weigh that against the software doing most of it. Then ask what happens in a month where something does go wrong: an HMRC letter, a cash flow scare, a big customer paying late. The firms worth a subscription treat those calls as included. The ones to avoid treat every question as billable extra, which quietly rebuilds hourly charging inside a fixed fee.
Ask the year-end firms the mirror question: what will this cost me if I ring you in July with a problem? A clear per-question or per-hour answer is fine. Vagueness is not.
Matching the model to the business
Growing headcount, VAT registration, and any owner who dreads their own bookkeeping all point towards monthly. A one-person business with tidy records and no VAT points towards year-end only, with the saved fee kept for the year that changes.
Both kinds of firm are easy to find among the 3,441 accounting firms listed on this site, and listings generally say which model a practice leads with. Compare firms in your area, or describe your business and ask for quotes both ways. Request each shortlisted firm to price you monthly and annually for the same scope. The gap between the two numbers tells you exactly what the watching costs, and you can decide if it is worth it.
