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Accountant vs Online Software: What's Better for South East London Sole Traders?
If you're a sole trader wondering whether you need an accountant or whether a piece of software can do the same job for a fraction of the price, you're asking a fair question. The honest answer: it's rarely either/or, most sole traders who get this right end up using both, just for different things.
Published 14 September 2026 · 6 min read
What online accounting software actually does well
Cloud software like Xero, QuickBooks or FreeAgent has genuinely changed what a sole trader can do without any help. For a few pounds a month, you get:
- Bank transactions pulled in automatically instead of typed up by hand
- Invoices sent and tracked in one place
- A live view of what you've earned and spent, not a spreadsheet from three months ago
- Making Tax Digital compatibility built in, which matters more each year as HMRC extends the requirement
For a sole trader with straightforward income and modest turnover, that alone covers a lot of ground.
Where software runs out of road
Software records what you tell it. It doesn't know what you haven't told it, and it definitely doesn't know tax law. In practice, that means:
- It won't flag an allowable expense you didn't think to claim
- It won't tell you if you'd be better off as a limited company instead of a sole trader
- It won't check your Self Assessment return before it's submitted, that's still entirely on you
- It won't notice a mistake unless you already know enough to spot it yourself
The software is only ever as good as the person using it, and most sole traders didn't start their business to become tax experts.
What an accountant actually adds
A good accountant isn't competing with your software, they're using it. The value is in what happens around the data, not the data entry itself:
- Reviewing what the software has recorded before anything gets filed with HMRC
- Catching allowable expenses and reliefs the software will never flag on its own
- Explaining what your numbers actually mean for real decisions, registering for VAT, taking on your first member of staff, or switching to a limited company
- Someone to call when HMRC sends a letter you don't understand
So what's right for a South East London sole trader?
Most sole traders across Catford, Lewisham and the wider SE postcodes do best combining the two: software for the day-to-day recording, an accountant for the parts that actually carry risk, the tax return itself, and anything HMRC-facing.
Software alone is fine right up until the year you get something wrong, and a mistake on a Self Assessment return can cost far more in penalties and back-tax than an accountant's fee ever would have. HMRC's own guidance on record keeping is worth a read either way, since the responsibility for accurate records sits with you regardless of which tool you use.
REYS Accountants sets clients up with proper cloud bookkeeping and then has a qualified accountant review it before your Self Assessment return goes anywhere near HMRC, so you get the speed of software with someone actually checking the work.
The short version
Software handles the recording. An accountant handles the judgement calls, the checking, and the moments when something doesn't look right. For most sole traders, that's not a choice between the two, it's knowing which one to trust with which part.
Frequently Asked Questions
For a very simple sole trader, some do. The risk is that software only records what you tell it, it won't catch a missed expense or check your return before it's filed, and mistakes on a Self Assessment can cost more than an accountant would have.
Common cloud platforms like Xero, QuickBooks and FreeAgent, we'll help set you up on whichever suits your business rather than insisting on one.
Already compulsory if you're VAT-registered. HMRC is extending it to Income Tax Self Assessment for higher-earning sole traders and landlords, with the threshold lowering over time, check gov.uk's current timeline for where that stands.
No, a good accountant reviews and checks what's already there rather than re-entering it, that's the point of using both together.
This article is general guidance for UK businesses and individuals and does not constitute personal financial or tax advice. Rules, thresholds and individual circumstances vary, always confirm your specific position with a qualified accountant before acting.
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