The Real Price Range

Why this question is harder than it looks

If you are hunting for a Small Business Online Tax Accountant in the UK, you have probably noticed that quotes range from £25 a month to well over £400. After twenty years in practice, I can tell you the gap is rarely about quality alone. It comes down to scope, complexity and who carries the risk if HMRC asks questions.

Online accountants have narrowed the gap with high street firms, because cloud software removes the paper-chasing. Yet pricing still depends on what you are asking them to do. A sole trader with one income stream and a limited company with staff are very different jobs.

Typical fees by business type

These are realistic ranges I see in 2026, based on straightforward records and no major complications.

Treat these as guides, not quotes. Anything far below them usually means limited support.

What pushes the fee up

Fees rise with transaction volume, messy records and multiple income sources. Property income, foreign earnings, CIS deductions and capital gains all add time.

• Late or incomplete bookkeeping that needs cleaning up
• Employees, pensions and P60, P45 and P11D reporting
• VAT registration with partial exemption or flat rate choices
• Director's loan account problems
• Open HMRC enquiries or penalty appeals

Sole traders: a worked example

Take a plumber with £40,000 profit in 2026/27. With the £12,570 personal allowance, taxable income is £27,430. Income tax at 20% is £5,486. Class 4 National Insurance at 6% on the same band is £1,645.80. Total: £7,131.80.

If she pays an accountant £300, that fee is an allowable expense. Her combined marginal rate is 26%, so the real net cost is about £222.

Limited companies and what they involve

A limited company has more compliance: annual accounts for Companies House, a CT600 return, a confirmation statement, and director payroll. Corporation tax is 19% on profits up to £50,000, 25% above £250,000, with marginal relief between.

That extra workload explains why even simple companies typically cost three to four times more than sole traders.

Hidden costs to ask about

Always ask whether the fee covers software licences, HMRC letters, mid-year questions and tax planning calls. Cheap headline prices often exclude these.

Making Tax Digital, Packages and Value

Making Tax Digital is changing the workload

Making Tax Digital for Income Tax began on 6 April 2026 for sole traders and landlords with qualifying income above £50,000. The threshold drops to £30,000 from April 2027 and £20,000 from April 2028.

Under MTD, you keep digital records and send quarterly updates to HMRC, then a final declaration instead of the old Self Assessment return. Expect accountants to charge more for this, typically £30 to £80 extra per quarter, because the work is now spread across the year.

Comparing common package structures

Fixed monthly fees suit most owners because budgeting is easier and advice is built in.

VAT and payroll as add-ons

The VAT registration threshold is £90,000 of taxable turnover. Once registered, you file returns under MTD for VAT, usually quarterly, and penalties for lateness now work on a points system.

Payroll brings its own obligations. Employer National Insurance is 15% above £5,000 per employee, and the Employment Allowance of £10,500 can offset it for eligible employers. A client with two part-time staff will often pay £20 to £40 monthly for payroll, plus pension auto-enrolment administration.

Online versus local accountant

Online firms win on price and speed, with document upload, video calls and fixed fees. A local accountant adds face-to-face reassurance, which some owners genuinely value. I would not tell a new sole trader they need local. I would tell a company with staff and complicated contracts to at least test a firm that has senior people available by phone.

Real saving through better advice

I once worked with a consultant paying herself a salary only. A better balance of director's salary and dividends cut her tax by roughly £2,400 a year, far more than her £1,200 annual fee. Good advice should pay for itself, so ask any prospective accountant to show examples of that.

Red flags when comparing quotes

Be wary of firms that refuse to name the individual handling your file, avoid discussing professional indemnity insurance, or do not belong to a recognised body such as ICAEW, ACCA, AAT or ATT. Unregulated bookkeepers can be excellent, but you should know exactly what safeguards exist.

Choosing, Budgeting and Getting Value

How to get an accurate quote

Prepare a one-page summary before you ask anyone. Include your business structure, turnover, number of transactions, staff, VAT status and any HMRC letters. The more precise you are, the more reliable the quote, and the fewer surprises later.

Key dates that affect your fees

Missing deadlines costs far more than any accountant. Online Self Assessment returns are due by 31 January, with balancing payments due the same day and second payments on account due 31 July. A late return starts with a £100 penalty, even if no tax is owed.

Companies House accounts and corporation tax payments follow separate deadlines, usually nine months after year end for payment.

Questions worth asking at the first call

Ask who prepares the work and who reviews it. Ask how quickly they respond, whether tax planning is included, and what happens if HMRC opens an enquiry. Their answers reveal more than their price list.

Keeping the cost down

Accountants charge by time, so good records reduce your bill. Use cloud software, reconcile your bank monthly, keep receipts digitally and answer queries promptly. I have seen clients cut fees by a third simply by sending organised records on time.

Switching accountants

Changing is straightforward. Your new accountant sends a professional clearance letter, and your former firm should provide handover information. Do it just after a filing deadline, not weeks before one.

Conclusion

A sensible price for a Small Business Online Tax Accountant in the UK sits between £150 and £400 for a sole trader, and £60 to £200 monthly for most limited companies. Aim for clear scope, a named adviser and genuine tax planning rather than the cheapest quote. Make sure your accountant is ready for Making Tax Digital, and treat the fee as an investment that should save you more than it costs. Rules and thresholds change by tax year, so always check current HMRC guidance or your adviser before acting.