Tax Advisor or accountant: what is the difference?

An accountant usually keeps your figures right and your returns filed on time. A Chartered Tax Advisor helps you decide what to do before a transaction, and deals with the harder questions: selling a business, leaving the UK, passing on wealth, or answering an HMRC enquiry. The two roles overlap and work well together. Many people need both, and it is common for a Tax Advisor to work alongside an existing accountant rather than replace them.

What an accountant typically does

Most accountancy practices focus on recording and reporting. That is skilled work, and getting it right underpins everything else. Typical services include:

• bookkeeping and management accounts
• annual accounts for companies, partnerships and sole traders
• VAT returns and payroll
• Corporation Tax and Self Assessment returns
• Making Tax Digital updates for landlords and sole traders

Plenty of accountants are also very knowledgeable about tax, and many hold a tax qualification. Accountants can and do advise, but a general practice is built around the yearly compliance cycle. Specialist planning is often referred out.

What a Chartered Tax Advisor does

A Tax Advisor's work is mostly forward-looking. Advice is usually most useful before something happens, because once a contract is signed or a gift is made, the tax result is largely fixed. Typical areas include:

• Structuring: salary or dividends, whether to incorporate a property portfolio, or setting up a family investment company.
• Transactions: capital gains tax on selling a business, shares or property, and whether reliefs apply.
• Inheritance tax and trusts: lifetime gifts, wills, and succession planning.
• Residence: the tax effect of leaving the UK or arriving here.
• HMRC enquiries and disclosures: responding to a compliance check or correcting past errors.

In practice the two roles complement each other. Our Director is both a Chartered Accountant (ICAS) and a Chartered Tax Advisor (CIOT), so we see both sides. When we advise a client who already has an accountant, we agree who does what, share what is needed, and leave the routine compliance where it is.

Which titles mean a qualification

In the UK, the words "accountant" and "tax advisor" on their own do not guarantee any qualification. HMRC's own 2024 consultation noted that almost anyone can start offering tax advice, and that anti-money laundering supervision was the only legal requirement to set up in business. Separate rules restrict who can carry out a statutory audit of company accounts, but preparing accounts and returns is open to anyone.

The chartered titles are different. "Chartered Accountant" and "Chartered Tax Advisor" belong to bodies incorporated by Royal Charter: ICAS (designatory letters CA) and the ICAEW (ACA) for accountants, and the Chartered Institute of Taxation (CTA) for tax. According to the CIOT, becoming a CTA requires passing its examinations and showing three years of relevant practical experience. Members then have ongoing obligations, including:

• following the Professional Conduct in Relation to Taxation, the ethical guidance shared by the main tax and accountancy bodies
• mandatory continuing professional development
• professional indemnity insurance if they are in practice
• anti-money laundering supervision

HMRC's Standard for Agents

Whatever their qualifications, anyone who deals with HMRC for a client is expected to meet HMRC's Standard for Agents. It focuses on integrity, professional competence and professional behaviour. Among other things, an agent should keep their knowledge up to date, keep records of the advice they give, have their own tax affairs in order, and agree clear terms of engagement before starting work. An agent must never ask you for your HMRC sign-in details, and must not suggest that HMRC endorses them. Our guide to spotting fake HMRC calls, texts and emails explains why that matters. HMRC estimates that around 65% of agents belong to a professional body.

What changed in 2026

The Finance Act 2026 introduced two changes for anyone paid to deal with HMRC on someone else's behalf.

Mandatory registration. The legal definition of a tax advisor covers anyone who, in the course of business, advises on tax or helps prepare documents HMRC relies on. That covers most accountants as well as Tax Advisors. Those that interact with HMRC for clients (calls, letters, filing returns or claims) must register with HMRC for an agent services account. Registration opened on 18 May 2026, in phases:

• Advisors with no HMRC agent account at all: 18 May to 18 August 2026.
• Those holding only a Self Assessment or Corporation Tax agent account: 18 August to 18 November 2026.
• Businesses that only run payroll for clients: 18 November 2026 to 18 February 2027.
• Financial services firms: from 31 December 2026, with three months to apply.

To register, a business must be supervised for anti-money laundering, be up to date with its own tax returns and payments (or have a payment plan), not be formally insolvent, and have no relevant fraud or tax convictions that are still unspent. Its directors or partners must not be disqualified. An Advisor who keeps dealing with HMRC after a compliance notice while unregistered faces a £5,000 penalty, rising to £10,000 in some cases, and HMRC may stop dealing with them. Firms that already had an agent services account did not need to register again. Help given free to friends or family is outside the rules.

Wider conduct powers. From 1 April 2026, HMRC's old powers against dishonest tax agents were replaced with a broader "sanctionable conduct" regime, which can apply to firms as well as individuals.

Registration is a minimum standard, not a quality mark. It does not test technical knowledge. The government has also not yet decided whether to regulate the tax advice market more widely.

Signs you need a Tax Advisor

• You are selling a business, a second property or a large shareholding.
• You are moving abroad, or have recently arrived in the UK.
• You want to plan for inheritance tax or set up a trust.
• You are thinking of moving rental property into a company.
• You have received a letter from HMRC opening an enquiry or asking about undeclared income.
• You hold shares from an employer scheme, or have income or gains overseas.

Questions to ask before you hire someone

1. Which professional body are you a member of, and can I check that on its directory?
2. Are you registered with HMRC as a tax advisor, and who supervises you for anti-money laundering?
3. Do you hold professional indemnity insurance?
4. Have you handled cases like mine recently?
5. What exactly is included in the fee, and will you send a written engagement letter before starting?
6. If I already have an accountant, how will you work with them?

Be wary of anyone who guarantees a large refund, promises tax savings that sound too good to be true, or asks for your HMRC login.

What to do now

1. Write down what you need: routine compliance, one-off advice, or both.
2. Check any Advisor's qualifications on their professional body's register.
3. Ask your current accountant whether they have registered with HMRC under the new rules.
4. If a sale, gift, move abroad or HMRC letter is coming up, get advice before you act.
5. Keep your accountant involved, so that advice and compliance stay joined up.

If you would like to talk through whether you need specialist advice, book a consultation and we will tell you plainly whether we can help, and how we would work with your existing accountant.

This article is general information about UK tax, based on the law and HMRC practice at the date shown above. It is not advice, and reading it does not make you our client. Tax rules change and their effect depends on your circumstances, so please speak to us before acting on it.