The AI accountant for UK business, built in London.
ac-co.ai is accounting and tax software that files with HMRC and Companies House through their official APIs, with a person approving every submission. Self Assessment, iXBRL accounts, Tracker & Timesheets and File from chat are in production today; the rest of the platform is in open beta.
A UK company, on the public register.
- Legal name
- ACCO-AI LTD, trading as ac-co.ai
- Company number
- 15253234 (England and Wales)
- Incorporated
- 1 November 2023
- Registered office
- 167–169 Great Portland Street, London W1W 5PF
- Recognition
- On HMRC’s list of Self Assessment software; recognised for MTD VAT and for Companies House iXBRL accounts.
4 products in production. The rest you can try.
We label every door on this site with its status, and the label means the same thing everywhere: Live is deployed and sellable; Open beta is on the production system behind sign-in and still moving; Waitlist is not deployed yet.
Four rules we hold ourselves to.
Every HMRC or Companies House submission stops at a review screen. You see the boxes, the figures behind them and the source document for each one, and you press the button.
Bank feeds come through Open Banking and are read-only. Xero and QuickBooks connections read your books; they never post to them unless you ask.
A box on a return links back to the transaction, invoice or HMRC record it came from. Receipts and statements are kept for six years.
A refund figure or a tax estimate says so until it matches your SA302 or the filed computation. We do not quote numbers we have not measured.
Rules from HMRC, not from a model’s memory.
The tax computations run the same formulas HMRC publishes for each form and tax year, and the filing channels are the ones HMRC and Companies House test us against before recognition. Our guides cite gov.uk for every figure and carry the date they were last checked. Where we are not sure, the page says so.
Questions about ac-co.ai?
Write to support@ac-co.ai, or use the contact form. Post reaches us at the registered office above.