Aipedia: Bookkeepers

AI guidance for bookkeepers: AAT, ICB, IAB

Aipedia, by the Apex broking team · Last reviewed 2026-10-27

As at October 2026, no UK bookkeeping body has AI-specific rules: AAT applies the PCRT AI guidance to tax work, and ICB and IAB rely on general conduct rules. Bookkeepers using AI therefore need to read existing duties onto new tools.

Part of: AI in Bookkeepers

In short

ICB's Professional Conduct Regulations and ethics pages do not mention AI or technology, and IAB has published no AI guidance. AAT applies the PCRT Topical Guidance on the Use of AI (January 2026) to tax work: disclose AI use in engagement letters, treat output as a junior colleague's work, stay accountable and keep client data out of public tools without consent. AAT's Digital ethics note covers cloud data but not AI. The CCAB draft statement on ethical AI does not apply to ICB, IAB or AAT members as such. For ICB members, the competence, confidentiality and records rules are the ones AI touches.

The position at a glance

Body or document	What it covers	Status	Date
ICB Professional Conduct Regulations	Competence, confidentiality, records, PI. No reference to AI or technology.	Binding on ICB members	Undated current version
IAB	No AI guidance found. AML supervision terms require PI.	Not applicable	Checked October 2026
PCRT Topical Guidance on the Use of AI (AAT application)	Engagement letters, checking output, accountability, confidentiality, audit trail.	Guidance that AAT applies to tax work	January 2026
AAT Digital ethics guidance note	Cloud data, security, UK GDPR Article 5. Not AI.	Guidance	Undated
AAT Comment articles	Practitioner views on AI use and accountability.	Opinion, not policy	18 and 19 August 2026
CCAB draft Statement on ethical AI	Ethical AI for members of CCAB bodies.	Exposure draft; not for ICB, IAB or AAT members as such	June 2026

ICB: general rules applied to AI

ICB has no AI-specific guidance; its ethics and regulations pages and the Professional Conduct Regulations do not mention AI or technology. The rules that matter for AI are:

Competence: s.12(a) says not to accept work where the member "lacks sufficient expertise or competence"; s.36 requires members to "perform and complete all work for clients carefully, diligently and promptly". Using an AI tool does not lower that standard, and relying on one you do not understand may fall short of it.
Confidentiality: s.14 requires confidentiality to be preserved "absolutely", unless the law or the Institute requires disclosure or it is needed to prevent crime. Uploading client data to an outside AI service needs to be squared with this.
Records: s.1 says trust depends on the "truthful, careful and diligent making and keeping of records"; s.17 forbids preparing records known to be false or misleading; s.25(d) requires CDD and transaction records to be kept for six years; ss.34 to 35 require client files to be kept safely.
Data protection: s.37 refers to the Data Protection Act 1998 "and later amendments". It has not been updated for UK GDPR or the Data Protection Act 2018, but members are bound by current law regardless.
PI: s.27(c) requires public practitioners to hold PI against claims for professional negligence, with a £50,000 minimum and cover appropriate to the size of the business.

IAB

No AI guidance was found on the IAB website. IAB acts as an AML supervisor, and its AML supervision page says applicants "must provide proof of professional indemnity insurance, which covers the services your practice provides". If AI lets you add services, that wording makes it important to keep your PI description up to date.

AAT: what members must follow

AAT licenses members in practice and is a PCRT body. It applies the PCRT Topical Guidance on the Use of AI (January 2026) to tax work. Key points:

1.3: include a statement on AI use in the engagement letter.
3.4: treat AI output as you would a junior colleague's work, and check for hallucinations.
3.5: members "remain ultimately accountable".
4.2: putting client data into public AI tools "is likely to constitute a breach of client confidentiality" without consent.
Keep an audit trail of the AI tools used.
Scenario 11 deals with tax software that can run without human review.

Outside tax work, AAT members are bound by the AAT Code of Professional Ethics, based on the IESBA Code and its five fundamental principles. AAT's Digital ethics guidance note covers cloud data, security and UK GDPR Article 5, but not AI.

Two AAT Comment articles add context. An interview with AAT's president (18 August 2026) said "Accountability does not transfer to the vendor when the processing does" and that AI should suggest, not write to the ledger. A practitioner article (19 August 2026) described smart-match bank rules, document capture, drafting assistants, chatbots and cash flow prediction. Both are opinion, not AAT policy.

CCAB, HMRC and related cases

The CCAB draft Statement on ethical AI (June 2026, exposure draft) applies to members of CCAB bodies, not to ICB, IAB or AAT members as such; see AI guidance for accountants. HMRC's mandatory tax adviser registration catches bookkeepers who deal with HMRC for clients; see GOV.UK. No disciplinary decision against a bookkeeper involving AI was found. In related tax cases, Elden v HMRC [2026] UKFTT 41 (TC) described an accountancy firm's AI-drafted submissions as "professional incompetence" (para 139), and Harber v HMRC [2023] UKFTT 1007 (TC) involved fictitious AI-generated cases.

What it means in practice and for PI

The absence of AI rules does not mean the absence of duties. A bookkeeper who accepts AI output without review risks breaching competence and records rules; one who pastes client data into a public tool risks breaching confidentiality. In practice:

Write AI use into your engagement letter, as PCRT 1.3 suggests even for non-AAT members.
Review AI output before it reaches the ledger or HMRC.
Keep a record of which tools you use and how you check them.
Keep client data out of public AI tools without consent.

No body has said anything about AI and PI. Your policy wording decides how AI-related claims are treated, and your declared services matter more than ever. See does PI cover AI mistakes for bookkeepers, answering tax questions with AI chatbots and AI software errors. Apex arranges PI for bookkeepers; a broker can review how your cover treats AI-assisted work. Back to the AI in bookkeeping hub.

Sources

Frequently asked

Has ICB published AI guidance?

No AI-specific guidance was found on ICB's website as at October 2026. Its Professional Conduct Regulations and ethics pages do not mention AI or technology, so its general rules on competence, confidentiality and records apply to AI use.

Does the PCRT AI guidance apply to AAT bookkeepers?

AAT applies the PCRT Topical Guidance on the Use of AI (January 2026) to its members' tax work. AAT bookkeepers who file returns or give tax advice should follow it. Pure bookkeeping work is governed by the AAT Code of Professional Ethics.

Does the CCAB draft statement on ethical AI apply to bookkeepers?

Not as such. The June 2026 exposure draft applies to members of CCAB bodies, which are ICAEW, ACCA, ICAS, CIPFA and CAI. It may still be a useful benchmark, but ICB, IAB and AAT members are not bound by it.

Is ICB's data protection rule out of date?

Section 37 refers to the Data Protection Act 1998 "and later amendments" and has not been updated for UK GDPR or the Data Protection Act 2018. Members must still comply with current data protection law.

Check your PI covers how you use AI

Tell us about your firm and the work you do. A broker will review how your current PI treats AI-assisted work, or arrange new cover. No fee for a quote. Or call 0117 325 0027.

Start a PI quote Request a callback

Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Registered in England and Wales, company number 07014570. This page is general information about how AI is used in the profession and how insurance may respond. It is not legal, regulatory or insurance advice on your circumstances, and it does not guarantee that cover will be available or on what terms.