The Chartered Tax Adviser (CTA) qualification from the Chartered Institute of Taxation (CIOT) is the higher level, advisory qualification; the ATT qualification from the Association of Taxation Technicians is aimed at tax compliance work. Many people take both through the ATT CTA Tax Pathway. Once qualified, both sets of members follow the same professional rules, insurance rules and anti money laundering arrangements, and neither body issues a practising certificate.

What is the difference between the CTA and the ATT?

The CIOT describes the CTA as the highest level tax qualification in the UK. When it explains the joint Tax Pathway, it describes the ATT qualification as providing tax compliance knowledge and the CTA as the gold standard for tax professionals. In practice, the ATT suits people who prepare returns and computations, and the CTA suits people who give technical and planning advice across one or more specialist areas.

The two are separate bodies. Both the Association of Taxation Technicians and the Chartered Institute of Taxation appear separately in Schedule 1 to the Money Laundering Regulations 2017 as professional body supervisors. They share a single conduct code, the Professional Rules and Practice Guidelines (PRPG), covered in more detail in CIOT and ATT professional rules.

What does the CTA exam structure look like?

On the direct route the CTA consists of seven exams:

  • One Awareness exam of 3 hours 15 minutes. Candidates choose three of five modules: VAT including Stamp Taxes; Inheritance Tax, Trusts and Estates; Corporation Tax; Taxation of Individuals; and Taxation of Unincorporated Businesses. Each module has 12 short questions worth five marks. A pass needs at least 50% overall and at least 35% in each chosen module, so a strong score on two modules cannot carry a weak third.
  • Three computer based exams (CBEs) of one hour each: Principles of Accounting, Law, and Professional Responsibilities and Ethics. All three must usually be passed, or exempted, before the candidate can enter the final CTA tax exam.
  • Two Advanced Technical exams of 3 hours 30 minutes, chosen from seven subjects including Taxation of Owner Managed Businesses, Human Capital Taxes, Taxation of Larger Companies and Groups, and Inheritance Tax, Trusts and Estates. They must be different subjects from the Awareness modules.
  • One Application and Professional Skills (APS) exam of 3 hours 30 minutes, a case study with pre seen information released two weeks before. No exemptions are available from the APS paper.

The CIOT says most students complete the exams in two to three years. The qualification is not awarded on passing the exams alone: the student also needs three years of relevant professional experience and must apply for CIOT membership.

How do you get into each qualification?

The CIOT lists five routes to the CTA:

  • Direct route: the seven exams above. Student registration costs £268 and is valid for three years.
  • ATT CTA Tax Pathway: a combined route to membership of both bodies. Students choose from six ATT exams at the Core Knowledge 1 and 2 stages and can sit the CTA Awareness exam instead of an ATT exam at Core Knowledge 2. No previous qualifications or experience are needed. Registration costs £449 and is valid for five years.
  • ACA CTA Joint Programme with ICAEW: open from the first day of an ACA training agreement or Level 7 apprenticeship, or partway through, provided the student works in tax. The CIOT says candidates can become dual qualified in as little as three to four years.
  • CA CTA Joint Programme with ICAS: the equivalent route for the ICAS chartered accountancy qualification.
  • Level 7 Taxation Apprenticeship in England, typically completed in 36 months. The end point assessment is the CTA APS exam plus a project report.

The joint programmes are being redesigned. Students will sit the Professional Responsibilities and Ethics exam, a new Tax Knowledge and Skills paper in either direct or indirect tax, and one Advanced level paper. The first sitting of the Tax Knowledge and Skills paper is in November 2026, and existing students may be on transitional rules.

Can an ATT or accountancy qualification shorten the CTA?

Yes. The CIOT publishes exemptions based on prior qualifications. The most useful for practitioners are:

Existing qualification CTA exemptions available
ATT exam qualified Awareness exam; valid ATT CBE passes carry across without charge
ACA exam qualified Awareness exam and Principles of Accounting CBE
ACCA exam qualified, having passed Advanced Taxation (UK) Awareness exam and Principles of Accounting CBE
AAT Level 4 exam qualified Principles of Accounting CBE
CIMA exam qualified Principles of Accounting CBE

ATT CBE passes carried across remain valid for nine sessions from when they were passed. If they lapse, the CBEs must be sat again. Exemptions can only be claimed after student registration has been approved, and the CIOT says it reviews requests within five to ten working days.

Which rules apply once you set up in practice?

The CIOT states that it does not require or provide practising certificates for members setting up as tax advisers. That is a real difference from ICAEW, ACCA and AAT, which all license members in practice, as explained in practising certificates. Instead, a CTA or ATT member in practice must meet the shared rules:

  • Professional indemnity insurance. The joint PII Regulations effective from 1 January 2023 define a member in practice as someone providing taxation services as a sole practitioner, partner, LLP member, proprietor of an unincorporated body, or director registered at Companies House of a company providing taxation services. The minimum limit is £1 million for each and every claim, but where gross fee income is below £400,000 it is the greater of 2.5 times gross fee income and £100,000. Any excess must not exceed £30,000 per principal, and cover must continue for at least six years after the member stops practising.
  • Anti money laundering supervision. A firm can be supervised by the CIOT or ATT only if at least one principal is a member. The supervision year runs from 1 June to 31 May and the fee for 2026/27 is £375. The CIOT recommends applying one to two months before trading. Registration that is three months or more late is charged for every year it should have been in place, and registration more than a year late is automatically referred to the Taxation Disciplinary Board.
  • PCRT, CPD and client money. All tax work must follow Professional Conduct in Relation to Taxation, CPD is mandatory for members in tax practice, and client money such as tax refunds must be held in a designated client account.

Separately, HMRC’s mandatory tax adviser registration applies to anyone paid to deal with HMRC on a client’s behalf, whatever their qualification. Online registration rolls out in stages between 18 May 2026 and 31 March 2027; see tax adviser registration with HMRC.

What can each member call themselves?

Paragraph 12.4.1 of the PRPG says a member must not use designatory letters or describe themselves as a CTA, CTA (Fellow), Chartered Tax Adviser, ATT, Taxation Technician or ATT (Fellow) unless authorised to do so. Under paragraph 12.4.2 a firm may describe itself as Chartered Tax Advisers or Taxation Technicians only if it complies with the bodies’ published regulations. A student who has passed every exam but not yet completed the experience requirement is not a CTA and should not use the letters.

How might the choice work out in practice?

Illustration only. Priya is a bookkeeper with an AAT Level 4 qualification who prepares sole trader and landlord returns. Her work is compliance heavy, so the Tax Pathway suits her: she can take ATT exams first, and if she later moves into advisory work she continues to the CTA without repeating the Awareness exam. Tom is ACA qualified and works in an owner managed business tax team. He can claim the Awareness exam and the Principles of Accounting CBE, leaving two Advanced Technical exams, the APS exam and two CBEs, plus the three year experience requirement. If either sets up alone, neither needs a CIOT practising certificate, but each needs compliant PII, AML supervision and HMRC registration from day one.

What mistakes do people make?

  • Using the CTA letters after passing the exams but before admission to membership.
  • Assuming that because there is no practising certificate there is no regulation. PII, AML supervision and CPD rules still apply to members in practice.
  • Starting to trade before AML registration is approved, which triggers back fees and possible disciplinary referral.
  • Letting ATT CBE passes lapse before transferring to the CTA, so they have to be sat again.
  • Treating the qualifications as alternatives to an accountancy qualification for audit or other reserved work. Neither confers audit rights; see what accountant qualifications mean.

Solar Protect runs fee protection schemes for accountancy and bookkeeping practices. See how our accountant schemes work or read fee protection schemes for accountants.

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Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 19 October 2026. Part of Accountapedia, the Solar Protect guide to UK tax and accounting. This page is general information, not personalised advice.