Free template

AI policy and engagement letter clause for accountants.

A free AI policy written for UK accountancy practices, and a clause for your engagement letters: client consent, the AI in your software and review before filing.

By James Tennant, independent AI consultant. Updated . Part of our guide to AI for accountants.

How to use these

  1. List your tools. Section 3 matters most: include the AI features in your accounting and practice software, not just ChatGPT and Copilot. Our checklist helps you work out what each one does.
  2. Fill in the brackets and delete what doesn’t apply.
  3. Add the clause to your engagement letters, so you have client consent before client data goes into AI tools.
  4. Brief the team, including anyone outsourced.
  5. Review every six months, and whenever your software adds AI features. It will.

The policy

[Practice name]: AI acceptable use policy

1. Purpose

AI tools can save our practice time, but our clients trust us with their financial affairs. This policy sets out how everyone at [Practice name] may use AI, so that we protect client confidentiality, meet our professional body’s Code of Ethics and the PCRT guidance, and stay responsible for every piece of work we produce.

2. Who this policy applies to

Partners, staff, contractors and anyone who works on client files for us, including outsourced and subcontracted bookkeepers, whenever they use AI for our work.

3. Approved AI tools

General AI assistants, used only through our business accounts:

  • [e.g. Microsoft 365 Copilot, with your work account]
  • [e.g. ChatGPT Business, through the practice workspace]

AI features in our practice and client software, and what each may be used for:

  • [e.g. Xero JAX: reading source documents and suggesting transactions, for review]
  • [e.g. Sage Copilot: pre-submission checks on VAT returns]
  • [e.g. IRIS Elements: anomaly checks before filing]

Only [Name or role] may switch on new AI features in any of our software, or connect AI tools to client ledgers, our practice management system or our document store.

4. Client consent

Client information may go into an approved AI tool only for clients whose engagement letter includes our AI clause, or who have otherwise agreed in writing. Clients who opt out are flagged in [our practice management system], and their information never goes into AI tools.

Client information must never go into a publicly available AI tool, such as a free or personal ChatGPT, Claude or Gemini account.

5. Information that never goes into AI tools

  • Identity documents and the results of anti-money laundering checks
  • Anything relating to money laundering concerns or suspicious activity reports
  • Login details, including HMRC and Companies House credentials and authentication codes
  • Special category data, such as health information
  • [Anything else your practice decides]

6. Review before anything leaves the practice

A qualified member of the team reviews any work produced with the help of AI before it goes to a client, HMRC, Companies House, a lender or anyone else. Check figures, tax rates, rules, dates and references against the source. AI-assisted work is never filed or sent unchecked, and the reviewer is as responsible for it as if they had prepared it themselves.

7. Recording AI use

When AI helped with a piece of work, note on the client file which tool was used, what for, and who reviewed it.

8. AI that talks to clients

AI that chases or replies to clients, such as automated reminders for missing records, uses wording approved by [Name or role]. It must not give tax or accounting advice, make promises about fees or deadlines, or pretend to be a person.

9. Accounts and security

Use your work account for every approved tool, never a personal one, and protect it with multi-factor authentication. Don’t install AI browser extensions, meeting note-takers or add-ons without approval from [Name or role].

10. Mistakes and incidents

If client information goes into the wrong tool, or AI produces something that worries you, tell [Name or role] straight away. We will assess whether it’s a personal data breach, which may need reporting to the Information Commissioner’s Office within 72 hours, and whether to tell the client or our professional indemnity insurer. Reporting it quickly matters more than the mistake.

11. Training and review

Everyone will be shown how to use the approved tools safely before they start. This policy was last reviewed on [date] and will be reviewed at least every [six] months, and whenever our software adds new AI features.

Signed: ______________________   Name: ______________________   Date: __________

The engagement letter clause

Section 4 of the policy relies on client consent. This clause asks for it. Adapt it to the tools you actually use.

Use of artificial intelligence

We use artificial intelligence (AI) tools to help us provide our services efficiently, for example to process and categorise records, draft documents and check our work.

We only use AI tools that keep your information confidential and do not use it to train their AI models. [Your information is processed in the UK or the European Economic Area, or with equivalent safeguards.] We do not put your information into publicly available AI tools.

A qualified member of our team reviews any work produced with the help of AI before we rely on it or send it to you, HMRC or anyone else, and we remain responsible for that work.

If you would prefer us not to use AI tools on your work, please tell us. [This may affect our fees or timescales.] More detail is in our privacy notice.

The policy and clause are a starting point, not legal advice. Check them against your professional body’s guidance and engagement letter helpsheets, and with your professional indemnity insurer, and make sure they match what your tools actually do.

Questions about AI policies for practices.

  • Do accountancy practices need an AI policy?

    If anyone in the practice uses AI, yes, and that now includes the AI built into accounting software. A policy shows how the practice meets its professional body’s Code of Ethics and protects client confidentiality, and it’s the first thing to point to if something goes wrong.

  • Do we need client consent to use AI?

    For publicly available AI tools, the January 2026 PCRT guidance says putting client data into them is likely to breach confidentiality unless the client has consented. Most practices also want consent for business AI tools, and the engagement letter is the natural place to get it.

  • Does using the AI in Xero, QuickBooks or Sage need consent?

    It depends on what the feature does with client data, such as whether it sends data to another AI company, and what your engagement letters already say. Check each feature’s terms, and cover AI in your engagement letter so the question doesn’t arise.

  • Does this replace our professional body’s guidance?

    No. It’s a practical starting point. Check it against your professional body’s guidance, your engagement letter helpsheets and your professional indemnity insurer’s requirements.

Start with an AI health check.

A fixed-price review of how your practice uses AI today, and what to change.

  • The AI in your software: Xero, QuickBooks, Sage, IRIS and the rest, what’s switched on and what it does with client data
  • The tools your team uses, including the ones nobody signed off
  • Client consent: your engagement letters and policies against the PCRT guidance
  • Clear next steps, in a short written report that’s yours to keep

£750 + VAT, fixed price.

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