Updated 2026-05-21
A UK accountant for personal tax costs £150–500/year for Self Assessment, £800–2,000/year for a limited company. Licensed bodies: ICAEW, ACCA, AAT, CIOT, CIMA. Non-accountant alternative: AML-supervised bookkeepers. Simple PAYE with a single employer does not need an accountant.
A real accountant in the UK is registered with one of four bodies: ICAEW, ACCA, AAT or CIOT. They charge a fixed fee (£150–400 for SA) — never a percentage of your refund. They never ask for your Government Gateway password — they connect through their own Agent Services Account. If an accountant found you through a WhatsApp group and charges a percentage, that is a sign of a scammer.
Find a real accountant — and avoid a fake one.
4 official registers, real prices for 2026/27, and 5 red flags you can spot in a minute. If an accountant is on a register and charges a fixed price — that is a professional.
DIY or hire — a simple test.
Most CIS workers and sole traders can manage on their own. You only need an accountant when things are really complicated.
DIY — you can do it yourself
Simple PAYE
One job, correct tax code, no side income. Check through your Personal Tax Account — nothing else needed.
CIS with standard expenses
One or two contractors, typical expenses (tools, PPE, travel), all statements available. SA103S takes 2–3 hours to fill in.
Sole trader with one income stream
Uber, Deliveroo, cleaner, tutor — one source, expenses are clear. Save £150–300 on an accountant.
Hire an accountant
Property income + SA
Renting out a property, mortgage interest, SA105 — complicated maths, many details (including Mortgage Interest Relief changes).
Foreign income
Double taxation treaties, remittance basis, SA106 — without a professional you risk overpaying or compliance problems.
Limited Company
Corporation Tax + PAYE + dividends + Companies House filing. DIY is almost impossible without specialist knowledge.
Income > £100,000
PA taper, pension contributions for optimisation — the cost of a mistake is higher than an accountant's fee.
4 official registers — only search here.
If an accountant is not in any of the four, they are not a licensed accountant. The UK does not have a mandatory government licence, but professional bodies are the only real protection.
Institute of Chartered Accountants in England and Wales
The largest professional body in the UK. All ACA-chartered accountants. Firms with the BAS logo offer a free first consultation.
Association of Chartered Certified Accountants
A global organisation, strong in small business and sole traders. Search by location and specialisation.
Association of Accounting Technicians
Licensed Members are often cheaper than chartered accountants, while still fully qualified for CIS, sole traders and property income.
Chartered Institute of Taxation
CTA (Chartered Tax Adviser) — specialises in tax. Needed for foreign income, non-residency, complex tax structures.
How much it costs — guide for 2026/27.
Prices vary by region, complexity and experience. London is more expensive. Regional accountants are closer to the lower end. All amounts exclude VAT unless stated otherwise.
An accountant with a fixed fee has no conflict of interest. They get the same amount regardless of your refund. An accountant who charges a percentage of your refund is a red flag. That is the structure of a refund agent, not an accountant.
5 red flags — spot them in a minute.
"Accountants" from WhatsApp chats who are not on any register are either refund agents or scammers. Five questions will help you filter them out.
Not in a public register
Check: find.icaew.com / accaglobal.com / aat.org.uk / tax.org.uk. If the name or firm is not found in any of them, it is an unlicensed practitioner.
Asks for your Government Gateway login and password
HMRC clearly says: never share your Government Gateway password. A real accountant registers as an agent through Agent Services Account and gets access without your password.
Promises a specific refund amount before seeing your documents
Without analysing P60, CIS statements and expenses, nobody can know the exact amount. Promising a specific figure "on the hook" is a marketing trick used by agents.
Only WhatsApp, no office and no engagement letter
A professional accountant provides an engagement letter (written contract) describing the services, responsibilities and fee. Working through WhatsApp without documents is a red flag.
Cash only, no fixed price and no receipt
Cash-only and verbal pricing make it impossible to protect yourself in a dispute. A real accountant issues an invoice and accepts bank transfer.
"Will I stay in control of my HMRC account?"
The correct answer is always: "Yes". An accountant works through Agent Services Account — they can see your data through the HMRC agent portal, but they do not need and should not have your login and password.
The accountant registers as an HMRC-authorized agent. You receive a 64-8 form (authorisation letter), sign it. The accountant gets read/write access to your SA through Agent Services Account — without your password.
The accountant asks for your Government Gateway email and password so they can "log in themselves". After that they have full control over your tax account. You cannot see what is happening. Refunds could be redirected to another account.
How to check agents and revoke access
Personal Tax Account → "Manage your agents". Here you can see the full list of who has agent access to your account. If you see unwanted agents, revoke access using the "Remove" button.
In development: enter a name or company — automatic check across ICAEW, ACCA, AAT, CIOT registers at once. The page /en/taxes/check-accountant will appear in the next iteration.
What next.
Where the numbers come from.
- find.icaew.com — ICAEW Find a Chartered Accountant
- accaglobal.com — ACCA Find an Accountant
- aat.org.uk — AAT Licensed Accountants Directory
- tax.org.uk — CIOT Find a CTA
- gov.uk — Using an agent to deal with HMRC
- gov.uk/appoint-tax-agent — Form 64-8, agent authorisation
- Sleek — How much do accountants charge for Self Assessment 2026