Meet Finn.
Your AI CFO. Always on. Always honest.
Finn handles your bookkeeping, answers your tax questions, raises your invoices, reconciles your expenses, and keeps you ahead of every filing deadline — in plain English, on any device.
Free during beta · No credit card required
Finn does everything a CFO does
Not a chatbot. A proper AI CFO that knows your books inside out.
Answer your questions
- "What's my estimated Corporation Tax this year?
- "Can I claim my home office as an expense?
- "When's my next VAT deadline?
Handle your bookkeeping
- "Log this receipt — coffee meeting with client
- "Mark that invoice as paid
- "Categorise last month's transactions
Create and send invoices
- "Raise an invoice for £4,500 to Acme Ltd
- "Send a payment reminder to my overdue clients
- "What invoices are outstanding this month?
Report on your finances
- "How much revenue have I made this quarter?
- "What's my profit and loss for the year so far?
- "Show me my top expense categories
Keep you ahead of deadlines
- "What do I need to file in the next 90 days?
- "Set a reminder for my Confirmation Statement
- "Remind me when my VAT return is due
Optimise your tax
- "What's the optimal salary/dividend split for me?
- "Am I claiming everything I'm entitled to?
- "What expenses am I missing?
Finn is wherever you work
On your laptop, your phone, in Slack, on a voice call. Finn fits around your day.
Web & desktop
LiveFull chat interface at accounts-os.com
Voice
LiveHands-free — talk while driving or working
Slack
LiveDM Finn directly in your workspace
Message Finn from your phone
Forward receipts to documents@accounts-os.com
"Think of Finn as the CFO you always wished you had — available at 11pm when you remember something, straight with you about your tax position, and never charging by the hour."
Paul Gosnell, Founder of AccountsOS
Questions about Finn
Is Finn actually an accountant?
Finn is an AI CFO — trained on UK tax law, HMRC rules, and accounting standards. Finn handles the day-to-day work a human bookkeeper or CFO would do, available 24/7. For complex edge cases, we recommend supplementing with a qualified accountant.
Can Finn take actions, or just answer questions?
Finn can take actions — create transactions, raise invoices, mark things as paid, log expenses, set deadlines, and more. Finn asks for confirmation before writing anything to your books.
How does Finn know about my company?
Finn has full context of your company — your transactions, invoices, deadlines, VAT status, and filing history. Every conversation is personalised to your actual financial situation.
Is my data safe with Finn?
Yes. Your data is encrypted, stored in the EU, and never used to train AI models. Finn only has access to your own company data.
Can I use Finn from my phone?
Yes — via WhatsApp, Slack, or the mobile browser. A native app is in the roadmap. Finn works wherever you work.
Ready to meet Finn?
Free during beta. Your first conversation takes 30 seconds.
Start talking to Finn