If you’ve started looking around for an accountant as a sole trader, you’ll already know that sole trader accountant fees are all over the place. One provider quotes you £24.50 a month; another wants £70. Both claim to offer roughly the same service. So what’s going on, and how do you know what you should actually be paying?

The short answer is that price reflects a mixture of what’s included, how the service is delivered, and — if you’re honest about it — how much human contact you’re actually going to get. Online-only services with slick branding can sit at the lower end precisely because you’ll be largely self-service once you’re signed up. That’s fine for some people. It’s not fine for others.

In our experience, most sole traders are better served by understanding what drives fees before they compare numbers. So that’s where we’ll start.

At a minimum, an accountant for a sole trader should be covering two things: your year-end accounts and your Self Assessment tax return. Those two tasks together represent the core compliance obligation you face each year as a self-employed person.

Beyond that, most packages layer in some combination of the following:

• Bookkeeping support or software — either access to a cloud accounting platform like Xero or QuickBooks, or someone actually doing the reconciliation for you (these are different things at very different price points)
• VAT returns — if you’re VAT-registered, quarterly submissions are a separate workload that should either be included or quoted clearly as an add-on
• Payroll — relevant if you employ anyone, including part-time staff or a spouse
• Ongoing advice — access to ask questions throughout the year, not just at year-end

The £24–£30 per month bracket tends to be compliance-only with a digital-first delivery model. You’ll handle most of your own bookkeeping, upload documents to a portal, and get limited direct contact. That suits sole traders with very simple finances, low transaction volumes, and the time and confidence to stay organised themselves.

The £45–£70 bracket typically adds more hands-on support, dedicated contact, and sometimes full bookkeeping. That’s where it starts to make sense for trades clients, anyone with a VAT obligation, or anyone who simply wants to be able to pick up the phone and get a straight answer.

Sole trader accountant fees are increasingly structured as monthly retainers rather than a single annual bill. There are good reasons for this on both sides: it smooths your cash flow, and it keeps the relationship active throughout the year rather than a frantic scramble every January.

That said, the monthly figure can mask what you’re actually committing to annually. £39 a month sounds reasonable — until you realise that’s £468 a year before VAT, and the Self Assessment alone might have been £300 as a one-off with a local firm.

A few things worth checking before you sign up to a monthly arrangement:

• Is VAT included in the quoted monthly fee, or added on top? Many online providers quote ex-VAT. At 20% that adds £5–£14 a month to the cost.
• What happens if you need something outside the package? Some providers charge separately for VAT registration, amended returns, HMRC correspondence, or anything that deviates from the standard flow.
• Is there a minimum contract term? Some require 12 months upfront. Others are genuinely rolling month-to-month.

There’s nothing inherently wrong with an annual one-off fee either, particularly if your affairs are genuinely simple. The key is to understand the total yearly cost, not just the headline number you see on a landing page.

We’re not going to pretend that price doesn’t matter — it clearly does, especially in the early years of trading when margins are tight. But the sub-£30 bracket is worth scrutinising carefully.

At that price point, you’re almost certainly getting a volume-based online service. Your Self Assessment gets processed efficiently by someone who has never spoken to you and likely never will. That’s fine if your income is straightforward — one source, no property, no capital gains events, no CIS deductions to reconcile. But if your situation is at all mixed, or if you want to talk through whether you should be doing anything differently, you’re often on your own.

The risk isn’t that these services do bad work — many file accurate returns. The risk is that they don’t do the work you didn’t know to ask for. They won’t flag that you’re approaching the VAT threshold. They won’t mention that a capital allowances claim could reduce this year’s bill. They won’t spot that you’re consistently over-paying on account payments and suggest you amend them.

That kind of proactive input isn’t standard at the low end. It’s not a criticism — it’s just a feature of the model. If you want an accountant who notices things and tells you, that has a cost.

“The cheapest accountant and the best-value accountant are rarely the same person.”

Not all sole traders have the same complexity, and fees should reflect that. Here are the factors that most commonly push costs upward — legitimately:

VAT registration

If you’re VAT-registered, your accountant takes on four quarterly submissions per year. Each one requires your records to be reconciled and the return to be filed under Making Tax Digital. That’s a material increase in workload and should be reflected in the fee. Expect to pay at least an additional £20–£40 per month if VAT is included.

High transaction volume

A sole trader turning over £80,000 with 400 transactions a month requires significantly more bookkeeping time than one turning over £30,000 with 50 transactions. Turnover alone doesn’t dictate complexity — transaction volume and the state of your records matter just as much.

Multiple income sources

If you have employment income alongside your self-employed earnings, rental income, share dividends, or capital disposals, your Self Assessment is more involved. More sources means more data to gather, more boxes to fill, and more opportunity to get something wrong — or to claim something you wouldn’t have known to claim without advice.

CIS work

Construction Industry Scheme subcontractors have their deductions to reconcile and claim back. This is a specific process with HMRC that most general-purpose online services don’t handle especially well. It warrants a specialist who knows the CIS rules and can make sure you’re not leaving refunds on the table.

The market rate for sole trader accounting in 2026 runs from roughly £25 to £70 per month for a retainer-based service, or anywhere from £200 to £600+ as an annual one-off fee, depending on complexity. Neither end of that range is inherently wrong — it depends entirely on what you’re getting.

A reasonable checklist when evaluating any quote:

• Do you have a named, dedicated contact — not a helpdesk or ticket queue?
• Is the fee fixed, or does it come with clauses about additional work?
• Does the accountant understand your sector? A trades subcontractor and a freelance designer have very different needs.
• Are they proactive — do they contact you before deadlines rather than chasing you to upload documents in January?
• Can you actually reach them? Not just via a portal message that gets picked up in three days.

The firms listed across comparison sites vary significantly in how they actually deliver against these points. Some are excellent. Some are genuinely fine for simple cases. The issue is that most people can’t tell until they’ve been a client for a year and something goes wrong — or nothing does, because the accountant was quietly on top of it the whole time.

That second outcome is what you’re actually paying for.