For accounting practices
£12 a live client.Nothing per user, nothing per feature.
Finn prepares across the book. Your team clears the exceptions desk and signs. No seat fees, no AI surcharge.
£12 a month for a client you actively work on, £1.50 for a dormant file you only touch at year end. Volume discounts apply automatically, you are billed in arrears on what you actually had live, and removing a client stops the charge from that day. Archive one instead and it stays in your book, unbilled, with nothing running on it until you restore it.
- Per live client, per month
- £12Per live client, per month
- Per dormant Ledger file
- £1.50Per dormant Ledger file
- Per user, per feature, per AI call
- £0Per user, per feature, per AI call
- Days free, no card
- 14Days free, no card
Work out your bill before you sign up.
Move the client count to your book. There is no minimum, so the number you see for one pilot client is the number you pay.
Live-client pricing
Monthly billing moves up or down with the number of active client companies you manage.
Estimated monthly price
£1,400
£10/client above 100
1-100
£12 per live client
101-250
£10/client above 100
251-500
£8/client above 250
- Practice dashboard and portfolio Finn
- Every client company covered
- Team seats included
- AI chat, document extraction and migration tools
- Billed per day a client is live, remove one and it stops
- Archive a client and it stays in your book, unbilled, with nothing running on it until you restore it
501+ live clients are quoted separately so migration, support and usage are properly covered.
Two Tiers, One Bill
Price each client company by how much work it actually needs.
Practice
For live clients you actively work on.
£12 per live client
per month, volume discounts from 100 clients, no minimum + VAT
- Bank feeds, plus CSV and PDF statement import
- AI categorisation and reconciliation across the book
- VAT and MTD filing to HMRC
- Invoicing, bills and expense claims
- Payroll
- Annual accounts and Companies House filing
- Finn on every client, plus batch prep across the whole book
- API and MCP access
Ledger
For dormant and low-activity files you only touch at year end.
From £1.50 per file
per month, any volume, no minimum, tailored rates on large books + VAT
- CSV and PDF statement import
- Journals and adjustments
- Fixed assets and depreciation
- Financial statements: P&L, balance sheet, trial balance
- Annual accounts preparation
- Document storage
- Finn included, fair use
- Automated bank feeds
- VAT and tax filing
- Invoicing and payroll
What's Included
No Surprises. No Add-Ons.
The price we quote is the price you pay.
- Billed monthly in arrears on live client count
- An invoice with a payment link: card or bank transfer
- Remove a client and the charge stops from that day
- Archive a client and it stays in your book, unbilled, until you restore it
- No per-user fees for your team
- No extra charge for AI features
- No limits on transactions or documents
The Numbers Make Sense
Compare the cost to your current setup
50 clients on Xero
£1,850-3,250/mo
At £37-65 per client, list price
50 clients
£600/mo
£12 per live client
You save
£1,250-2,650/mo
Every month
Based on Xero list pricing after the 2026 pricing shown publicly. Even with a partner discount, the bigger saving is time: Finn handles the categorisation, reconciliation and month-end, so each person on your team services more clients.
Practice Mode: common questions
Can I move my whole client book to AccountsOS?
Yes. Practice Mode includes bulk client-book migration: you add each client and paste their export from Xero, QuickBooks or Sage, AccountsOS creates a company per client, and Finn works out what each file is (trial balance, contacts, open invoices and bills, opening balances, VAT history). You see exactly what it will import and review before anything posts to the books.
See the four ways to add a clientHow much does AccountsOS cost for an accounting practice?
Practice pricing is based on live client companies, priced from client 1 with no minimum: £12 per live client + VAT, with automatic volume discounts as your book grows. For dormant or low-activity files you only touch at year end, our Ledger tier is priced from £1.50 per file + VAT, any volume. You pay, not your clients, billing is worked out per day a client is live so removing one stops the charge that day, archive a client and it stays in your book, unbilled, with nothing running on it until you restore it, and the price does not climb every September the way Xero and QuickBooks have.
See how Full and Ledger scope workDo my clients need to log in or pay anything?
No. Clients are covered by your practice plan, not billed their own subscription, and they never need to log in. You are the user, Finn is your tool, and the Practice Dashboard is your command centre.
How is this different from Xero or QuickBooks for accountants?
Xero and QuickBooks charge per client and have raised UK prices repeatedly while unbundling features into paid add-ons. AccountsOS gives the practice AI-native migration, Finn across the whole client book, API access and MCP access in one platform. Finn does the categorisation, reconciliation and month-end across your whole book, so each person on your team services more clients instead of more software.
See how team allocation worksCan AccountsOS file VAT to HMRC?
Yes. AccountsOS is HMRC-recognised software for MTD VAT and files VAT returns straight to HMRC. MTD for Income Tax support is coming for the April 2026 changes.
How does Finn save my practice time?
Finn reads receipts, statements and invoices, categorises them, reconciles the bank, and prepares month-end and year-end across every client in the background. Your team reviews the exceptions rather than doing every line, which is how one person services far more clients.
Which countries does AccountsOS support?
AccountsOS is live in 26 countries, including the UK, Ireland, the US, UAE, Australia and most of Europe, each with country-specific tax rules, deadlines and compliance. You can manage clients across multiple countries from one practice account.
Is there a contract or lock-in?
No long-term lock-in. Practice pricing is straightforward and your data is yours. You can export at any time.
Where is my clients' data stored, and do you train AI on it?
Your clients' books are stored in London on AWS eu-west-2, encrypted and access controlled. The data is never used to train AI models: not by us, and not by our AI providers, who process it under agreements that forbid training on it. Our data processing agreement is published at /dpa, so you can read it before you sign up rather than after.
Can Finn change a client's books without me?
No. Finn reads the books freely, but anything that writes to them is proposed in plain English and waits for your confirmation first. Finn cannot quietly add a bank account and cannot connect a live bank feed for you, which stays a Settings action done by a person. Finn prepares VAT returns and annual accounts, and you review, file and sign them.
How does Finn know a tax rate is right?
Finn does not guess a rate. It looks each one up from a dated, sourced tax library and cites where it came from, so you can check it against gov.uk or the relevant revenue authority yourself. Rates are stored with the dates they apply from, which means a return for an earlier year uses that year's rate rather than today's. The arithmetic is then done in code against the ledger, not by the language model. If Finn has no source for something, it tells you instead of filling the gap.
Do I have to use the practice management side?
No. The books are the core: Finn on every client's ledger, receipts, payroll, VAT and year-end. Practice management (onboarding, contracts, team, timekeeping, economics) is a second module. Use it if you want one system. Skip it if you already run the firm in something else.
See the two modulesWhat can Finn do for my practice beyond the books?
The practice desk is the start, not the whole product: adding clients four ways, allocating work across your team, setting Full or Ledger scope per client, batch-preparing a whole deadline group, and asking a client a question without leaving the desk are all shipped, live features, not a roadmap slide.
See every practice featureBring one client across today.
No quote to request and no call to book. Sign up, add a client, and see how Finn handles their books. You’re billed in arrears on live clients, so a trial costs you nothing but the time.