A Chartered Tax Adviser (CTA) is a member of the Chartered Institute of Taxation (CIOT) who has passed its seven CTA exams and completed three years of relevant professional experience. Chartered Tax Adviser is a protected title, whereas anyone in the UK can call themselves a tax adviser, so the letters CTA tell you who has examined the adviser and whose conduct rules they follow.
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What is a Chartered Tax Adviser?
A CTA is a member of the CIOT, a body founded on 5 December 1930 that gained charitable status on 15 September 1981 and a Royal Charter on 29 April 1994. In 1997 the Privy Council agreed that members may use the title Chartered Tax Adviser. The CIOT says it has over 20,000 members in the UK and over 30,000 worldwide.
The CIOT states that Chartered Tax Adviser is a protected title in the UK and also in Ireland, Australia, Hong Kong and South Africa. A member who resigns can no longer use the CTA designation or call themselves a Chartered Tax Adviser.
This page is written for people deciding whether to use a CTA and how to check one. If you are choosing which qualification to study, our comparison of CTA and ATT qualifications is the better starting point.
Can anyone call themselves a tax adviser?
Yes. The CIOT says the provision of tax services is not a formally regulated activity, and that anyone is able to refer to themselves as a tax adviser, whether or not they are professionally qualified. The title Chartered Tax Adviser is different, because only CIOT members can use it.
HMRC is now bringing in compulsory registration for anyone who deals with HMRC about someone else’s tax affairs and is paid for it. It is being introduced in stages, with different groups given registration windows opening on 18 August 2026, 18 November 2026 and 31 December 2026. Registration is an HMRC requirement, not a qualification. Our guide to tax adviser registration with HMRC covers the detail.
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How does someone become a CTA?
The CIOT’s direct route has seven modular exams:
- an Awareness exam covering three subjects chosen from VAT including Stamp Taxes, Inheritance Tax, Trusts and Estates, Corporation Tax, Taxation of Individuals and Taxation of Unincorporated Businesses
- three computer based exams in Principles of Accounting, Law, and Professional Responsibilities and Ethics
- two Advanced Technical exams chosen from seven options
- one Application and Professional Skills exam chosen from five options
The CIOT says most students complete the seven exams in two to three years. Passing is not enough on its own: the CTA is only awarded once the student has three years of relevant professional experience and has applied for membership. That experience can be in tax, audit or accounts, as long as it includes some UK tax work. There is also a joint ACA CTA and CA CTA programme for trainee chartered accountants.
What rules does a CTA have to follow?
- Professional Conduct in Relation to Taxation (PCRT). This sets the standards for tax work by members of seven bodies: AAT, ACCA, ATT, CIOT, ICAEW, ICAS and STEP. An updated version took effect on 1 January 2026, keeping five fundamental principles and five standards for tax planning.
- Professional indemnity insurance. CIOT and ATT members running tax or accountancy businesses must hold it.
- Continuing professional development. There is no set number of hours, but members must keep their skills current and confirm this in an annual statement.
- Anti money laundering supervision. Tax advisers must be registered for it, and the CIOT acts as a supervisor for members in practice who apply.
- Discipline. Disciplinary cases are handled by the Tax Disciplinary Board, and a member with an ongoing case cannot resign.
Our page on CIOT and ATT professional rules looks at these duties from the member’s side.
How is a CTA different from an ATT member?
The Association of Taxation Technicians (ATT) is a charity and describes itself as the leading professional body for those providing UK tax compliance services. Its members use the practising title Taxation Technician, and its Fellows use Taxation Technician (Fellow). The ATT says one of its key aims is to provide a qualification for people who do tax compliance work, while the CIOT describes the CTA as the leading qualification in professional tax expertise. The ATT also provides eligibility to take the CIOT’s exams. The two bodies run an ATT CTA Tax Pathway leading to membership of both, and the ATT publishes the monthly journal Tax Adviser jointly with the CIOT.
How is a CTA different from an accountant?
The CTA is a tax qualification awarded by the CIOT. An accountant qualifies through an accountancy body; an ICAEW chartered accountant, for example, uses ACA or FCA after their name. The two can overlap: the joint ACA CTA programme lets trainee chartered accountants work towards both, and PCRT is issued jointly by seven bodies that include ICAEW, ICAS, ACCA and AAT as well as the CIOT and ATT. For the accounting titles, see accountant qualifications explained and the chartered accountant designation; for who supervises whom, see regulated and unregulated accountants.
How do you find and check a CTA?
The CIOT runs a “Find a CIOT Member” directory to help businesses and the public find Chartered Tax Advisers, with a separate directory for ATT members. The CIOT does not endorse any listed member for particular advice, so treat the directory as a starting point.
The CIOT’s own guidance on choosing an adviser suggests asking:
- what services they provide, and their qualifications and experience
- whether they belong to a professional body that follows PCRT
- whether they hold professional indemnity insurance
- whether they are registered for anti money laundering supervision
- whether they have specialist expertise for your situation, and who will actually do the work
A firm can describe itself as “Chartered Tax Advisers” only if it meets CIOT conditions, such as all principals being CTAs or at least 50% of principals in public practice being CTAs. Once you appoint someone, expect an engagement letter setting out the work; see engagement letters. If HMRC later opens an enquiry, the adviser’s fees for handling it can be insured through tax investigation insurance.
What does checking a CTA look like in practice?
Illustration only. Helen owns a small manufacturing company and wants advice on passing shares to her two adult children. Her bookkeeper prepares the VAT returns, but says this is outside their experience.
- Helen searches the CIOT directory and finds two CTAs near her who list Inheritance Tax and owner managed businesses as specialisms.
- She asks each one whether they follow PCRT, hold professional indemnity insurance and are supervised for anti money laundering. Both confirm, and one asks for her identity documents straight away.
- She asks who will do the work and gets an engagement letter before any advice is given.
| Adviser | Body | Title or letters | Main focus | Follows PCRT |
|---|---|---|---|---|
| Chartered Tax Adviser | CIOT | CTA, a protected title | Professional tax expertise | Yes |
| Taxation Technician | ATT | Taxation Technician | UK tax compliance | Yes |
| ICAEW chartered accountant | ICAEW | ACA or FCA | Accounting, audit and tax | Yes |
| Unqualified tax adviser | None | Any | Varies | Not required |
Frequently asked questions
Is a CTA the same as a chartered accountant?
No. A CTA is qualified in tax through the CIOT; a chartered accountant is qualified in accounting through a body such as ICAEW. Some people hold both.
Does a CTA have to have insurance?
Yes, if they run a tax or accountancy business. The CIOT requires those members to hold professional indemnity insurance.
Can a CTA lose the title?
Yes. A member who resigns cannot use the designation, and the Tax Disciplinary Board handles disciplinary cases.
Do I need a CTA for a simple tax return?
Not necessarily. The ATT says its qualification is aimed at people who do tax compliance work, and accountants also prepare returns. A CTA is worth considering when the question goes beyond completing the return.
If HMRC opens a check into your return, tax investigation insurance pays your accountant’s fees. Solar Protect cover pays up to £100,000 with no excess; it never pays tax, interest or penalties. Read how our cover works or get a quote.
Sources
- CIOT: Our history
- CIOT: Cta membership overview
- CIOT: Membership faqs
- CIOT: Cta qualification direct route
- CIOT: Choosing a tax adviser
- CIOT: Pcrt update published to reflect new international standards
- GOV.UK: Check if and when you need to register as a tax adviser with hmrc
- www.att.org.uk: About att
- CIOT: Cta the international standard
- pilot-portal.tax.org.uk: Find a member
Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 8 November 2026. Part of Accountapedia, the Solar Protect guide to UK tax and accounting. This page is general information, not personalised advice.