AI bookkeeping in the UK: run one month and check it yourself
The sound way to start AI bookkeeping is one real month in which the AI proposes every entry and you release each one. You count what you had to change, then widen its rights only where the count is low. This guide gives the month, the five checks and a made up scorecard. It is general information, not advice on your own tax position.
Before you start
AI bookkeeping needs a ledger, because a chat keeps no entries and nothing in it has to balance. Your books stay your duty whichever tool you use: every company must keep adequate accounting records (Companies Act 2006, section 386).
Use a closed month you already know, so you can compare the result with what you expect. Then decide what the AI may see: what to keep out of a chat, and which plan you are on.
The month, step by step
These are the steps in Octobooks. Another ledger with an MCP connector will have its own version.
- Connect. In Claude, open Settings, then Connectors, choose Add custom connector and enter
https://mcp.octobooks.ai. Sign in as yourself, and tick what the connection may do: Read the books, Propose, Hand in documents (help page). - Keep the release with you. On the page Control, set yourself as the one who releases a booking. There are five ways to release: you, your AI, two agents together, a rule you approved, or a stamp you type.
- Hand in the month. Give it the bank statement and the receipts for that month.
- Ask it to work. "Read the Octobooks guide and tell me what my books are waiting for."
- Release one by one, and count. Mark each proposal as kept or changed, by type.
The five checks
| Check | Pass | What a fail tells you |
|---|---|---|
| Bank | The ledger's bank balance equals the statement at month end, to the penny | A line is missing, doubled or dated wrongly |
| Receipts | Every line with VAT reclaimed has a document behind it | VAT is being claimed without evidence |
| VAT | Ask: "Show me the VAT return for the last quarter and explain every figure." Each box leads to its entries | A figure has no explanation you can follow |
| Who was paid | Each supplier is someone your business really buys from, with no private spending in costs | Private items are reaching your costs |
| Trail | Every change appears as a reversal plus a new entry | Something was overwritten, so stop and find out why |
A scorecard
The figures are made up: one month with 140 proposals.
| Type of entry | Proposed | You changed | Change rate | Next month |
|---|---|---|---|---|
| Bank charges and direct debits | 42 | 0 | 0% | Approve a rule |
| Sales receipts matched to invoices | 58 | 1 | 1.7% | Approve a rule after one more clean month |
| Supplier bills | 28 | 2 | 7.1% | You release |
| Odd one offs, mixed use, VAT in doubt | 12 | 3 | 25% | You release, and keep it that way |
| Total | 140 | 6 | 4.3% |
The total does not decide anything; the rows do. The 25 percent row is where a wrong entry costs money, because those are the VAT calls. A wrong VAT figure is your problem, not the software's: see who pays if AI gets the VAT return wrong.
The thresholds in the last column are our suggestion, not a rule from HMRC. Keep the scorecard itself. HMRC expects care that suits your circumstances, and "systems" that fit how complex your affairs are (CH81120). A written review of what the AI got wrong helps show that care, though nothing we found says HMRC treats any AI tool as reasonable care by itself.
What stays with you
Octobooks does not move money or send email. It prepares the VAT return, and you submit it: direct filing is not switched on yet. For Making Tax Digital for Income Tax, Octobooks is not on HMRC's list of compatible software yet: what software must do. Year end accounts and the Company Tax Return remain the directors' job: filing a CT600 yourself.
Keep going
- Can Claude do my accounting?
- Can ChatGPT do my bookkeeping?
- Do I still need an accountant if AI keeps my books?
- What does AI accounting cost?
- Is it safe to let AI book entries in my books?
- Selling online: Amazon settlements, Shopify payouts
Sources: Companies Act 2006, section 386, HMRC CH81120: reasonable care. Seen 4 November 2026.