“You run the business. I’ll run the books.”
Hi, I’m Finn.Your AI accountant.
Snap a receipt or forward me an email and I’ll book it. Then I file your VAT to HMRC, run payroll, close month-end, and prepare your annual accounts. The whole accounting job, done, for $24/month.
AccountsOS is AI accounting software for founders, sole traders and small businesses, live in 23 countries. Plain-English accounting that runs itself, from $24/month.
Free for 14 days, then $24/month · No card required
One Finn, every channel. Tap me to say hello.
I don’t stop at bookkeeping. One receipt in, filed accounts out:
One Finn. However you talk to her.
- Built secure
- Two-factor authentication
- Bank-level encryption
- Read-only bank access
- Row-level data isolation
- AI never trains on your data
Built for you
Whatever you run, Finn runs the books.
Just starting out
First year handled. We set the company up and file your first return.
Sole trader & freelancer
Snap receipts, track expenses, file Self Assessment. No spreadsheets.
Contractor
Inside or outside IR35. Books, VAT and tax, sorted in seconds.
Limited company
Companies House, VAT, Corporation Tax and annual accounts, on autopilot.
Bigger team or running a practice? Established business · Accountants & practices
See it in action
Meet Finn, your AI accountant.
Ninety seconds: receipts captured, questions answered, invoices chased, month-end closed, and VAT filed straight to HMRC, all in the background.
She works while you don’t
You run the business. Finn runs the books.
Not a dashboard you fill in. An accountant who works in the background, 24/7. Send your receipts and statements and Finn reconciles, closes your month, and prepares your accounts on her own. She only asks when something is genuinely missing.
Send it, any way you like
Finn
takes it from here
Finn handles the rest, automatically
Talk to her
No forms. No menus. Just ask Finn.
Type it, say it, or send it over. Ask “how much did I spend on software?” or “when’s my VAT due?” and get a straight answer. Tell her to raise the invoice or file the return and she does it, with your nod first, in over 100 languages.
The whole accounting job, not a slice of it
Books that just happen
Forward a receipt or statement. Finn files it, matches it, keeps it straight.
Tax, handled before it's due
Deadlines tracked, VAT filed to HMRC, savings flagged while you can still act.
Money in, money out
Invoices that chase themselves. Bills, payroll and expenses in one place.
Know your numbers
P&L, balance sheet and VAT, live from your ledger. No spreadsheet required.
One platform, one price
Finn runs your books, and everything that feeds them.
Your contacts, pipeline, quotes, contracts, invoicing and chasing live in the same place as your accounts. One tool, $24/month, instead of a pile of apps that don’t talk to each other.
Each country has its own tax engine, registry sync and currency. Not a generic translation layer.
See all countriesThe maths
A whole accountant for $24/month.
Founders typically spend hundreds a month on an accountant, bookkeeping software, receipt scanning, payroll and invoicing. Finn replaces all of it.
| What you’re replacing | Typical cost |
|---|---|
| Accountant | £100-300/month |
| Bookkeeping software | £20-35/month |
| Receipt scanning | £15-30/month |
| Payroll software | £10-20/month |
| Invoicing tool | £10-20/month |
| Traditional total | £155-405/month |
| AccountsOS | Free* |
*Free for 14 days, then just $24/month
Everything included. No credit card to start. Cancel anytime. See all 75+ features
You’re always in control
Jump into the numbers, or let Finn run them.
Some founders want to see everything. Some never want to think about it. Finn works either way. Open the dashboard for a live view of cash, what you’re owed and what’s due, or close the laptop and let her get on with it.
See it yourself
A clean dashboard with your cash, receivables, payables and what needs you, plus the full books one click away. Everything a spreadsheet gave you, kept up to date for you.
Or don’t lift a finger
Feed Finn your receipts and statements and forget it. She keeps the books straight, files on time, and pings you only when she needs the one thing she’s missing.
Real activity on AccountsOS today
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Built for the agent era
AI agents read this site more than humans do.
That is not a problem, it is the point. AccountsOS is built AI-native: Finn runs on Claude Sonnet and Gemini, your own AI tools can plug into your books today, and when your business runs on agents, they will talk to Finn directly. You keep the dashboards. The agents get a handshake.
Finn's reasoning. The model accountants already use for advice, running your books.
Reads your receipts, statements and contracts. Vision built in.
Connect Claude to your books now. Ask your own AI about your numbers.
Your agents can talk to Finn directly. The handshake is already wired.
Your records stay in London. AI calls never train the models.
Every number above is live. Nothing an agent does can touch your books without a confirmed, logged action, and the sums are computed, never generated.
Everything included in AccountsOS
AI & assistant
- Finn on every page
- Voice that acts
- Document intelligence
- Long-term memory
- Proactive insights
- Month-end close
Bookkeeping & banking
- Any-bank CSV/PDF import
- Auto-categorisation
- Bank rules
- Reconciliation
- Double-entry ledger
Tax & filing
- VAT MTD to HMRC
- Corporation Tax + marginal relief
- Annual accounts wizard
- Deadline reminders
- Self assessment
Invoicing & money
- Multi-currency invoices
- Recurring + auto-chasers
- Bills & payments
- Estimates & quotes
- Dividends & vouchers
Payroll & expenses
- Payroll with RTI
- Expense claims
- Approval workflow
- Mileage & home office
- Batched reimbursement
Reports
- Profit & loss
- Balance sheet
- VAT summary
- Cash-flow forecast
- Trial balance
Integrations
- Claude Desktop & ChatGPT
- WhatsApp, Slack, Telegram
- Companies House
- Plaid, Stripe, Wise, Mercury
- Deel
Security
- Two-factor auth
- Bank-level encryption
- Row-level isolation
- Audit trail
- AI never trains on your data