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Aipedia: Bookkeepers
A VAT return is only as accurate as the coding beneath it, so AI-coded ledgers need a VAT-specific review before submission. When a return is wrong, clients commonly look to the bookkeeper for the tax, interest and penalties that follow.
Part of: AI in Bookkeepers
In short
VAT returns that bookkeepers file may be built from ledgers coded wholly or partly by AI tools. Typical errors include the wrong rate on mixed supplies, VAT reclaimed on purchases from unregistered suppliers, and missed reverse charge entries on overseas services or construction work. ICB members must work carefully (s.36) and keep truthful records (s.1); AAT members doing tax work follow the PCRT AI guidance. If HMRC assesses the client, the client may claim from the bookkeeper. PI usually responds to negligent preparation, but recovery of penalties depends on the wording.
By the time a bookkeeper opens the VAT return screen, many entries may already have been touched by AI: captured from receipts, matched from the bank feed and coded by learned rules. The return itself is then calculated by the software and submitted digitally. The bookkeeper's judgement is needed at the point most tools do not prompt for it: checking that the treatment of each type of supply is right.
Areas where AI coding is weakest include reverse charge services from overseas suppliers, the domestic reverse charge in construction, partial exemption, mixed-rate supplies, and private use.
These are judgement calls about the nature of a supply, which a tool trained on payee names cannot reliably make. A supplier name tells the software who was paid, not what was bought, where the supplier belongs or how the client will use it. That is why VAT review needs a human who knows the client's business, even when the ledger itself was coded automatically and the return calculates without errors.
The ICB rules are in its Professional Conduct Regulations.
Illustrative scenario: a bookkeeper files quarterly VAT returns for a small design firm. The firm buys software subscriptions from an overseas supplier, and the coding tool posts them as zero-rated purchases with no reverse charge. For a fully taxable business that may net to nil, but the same firm also makes some exempt supplies, so the missing entries affect the partial exemption calculation. An HMRC check finds the errors over several periods. HMRC assesses the firm, which asks the bookkeeper to pay the extra VAT, interest, any penalty and the accountant's fees for the disclosure.
Note that underpaid tax itself is usually not a loss caused by the bookkeeper, because it was always due. The claim tends to focus on interest, penalties and the cost of putting things right.
A claim that a VAT return was negligently prepared generally falls within bookkeepers' PI, subject to the policy terms, limit and excess. Policies differ on penalties: some cover a client's penalty claimed as damages, others exclude fines and penalties. HMRC enquiry costs are a separate risk; see VAT compliance check insurance. AAT licensed members must hold full civil liability cover, and ICB public practitioners must hold PI against professional negligence claims (s.27(c)).
Apex arranges PI for bookkeepers who file VAT returns; a broker checks how your policy treats penalties and declared tax work. More on the AI in bookkeeping hub.
Usually not in full. Tax that was always due is generally not a loss caused by the bookkeeper. Interest, penalties and correction costs are the more common heads of claim, and liability depends on the facts.
For AAT members doing tax work, the PCRT AI guidance recommends a statement on AI use in the engagement letter (1.3). ICB has no specific rule, but transparency helps if a dispute arises later.
Use them, but do not treat them as a review. Built-in checks catch arithmetic and format errors, not whether a supply was correctly treated. Under ICB s.36 and, for AAT members, the PCRT AI guidance at 3.4, the bookkeeper is expected to check the substance of what is filed.
Defence costs for an HMRC enquiry into your client are usually a separate tax investigation product, not PI. PI responds when the client alleges your negligence caused it a loss.
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 callbackApex 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.
