How Finn Works
Finn isn't software you use — he's an AI CFO that works for you 24/7. Throw information at him however you like. He processes it all automatically, proactively alerts you on deadlines, and optimizes your tax.
Four Ways to Brief Finn
However you work, Finn adapts. Snap photos, forward emails, talk while driving, or upload in bulk. Every input method works seamlessly.
Snap Receipts
Take a photo of any receipt. Finn extracts the vendor, amount, date, and category automatically.
- Finn reads every detail from the image
- Auto-categorizes by expense type
- Stores original image for HMRC
- Works with crumpled, faded receipts
Forward Emails
Forward invoices, statements, and receipts to documents@accounts-os.com. We process them automatically.
- Unique email per company
- Processes PDFs, images, and text
- Extracts invoice details automatically
- Links to your transactions
Voice Commands
Talk to your accounts while driving. Ask questions, record expenses, or dictate notes — hands-free.
- Natural language processing
- Works with any accent
- Record expense notes on the go
- Ask complex accounting questions
Upload Documents
Drag and drop bank statements, contracts, and any financial documents. We read and categorize everything.
- PDF, CSV, Excel supported
- Bank statement parsing
- Contract term extraction
- Bulk upload support
Always On, Always Working
You don't "use" Finn. He runs in the background, processing everything you throw at him — receipts, emails, voice notes, bank transactions — and proactively alerts you when action is needed.
Intelligent Features That Work For You
From automatic company setup to proactive tax optimization, every feature is designed to save you time and money.
Companies House Sync
Enter your company name or number — we fetch everything else automatically. Incorporation date, directors, SIC codes, PSC details, and all your filing deadlines.
- One-click company setup
- Auto-populated director details
- SIC code-specific tax advice
- Deadline calculation from incorporation
Proactive Deadline Alerts
Based on your incorporation date, we calculate every deadline: Corporation Tax, Annual Accounts, Confirmation Statement, VAT returns. Get reminded weeks ahead, not days.
- Email reminders at 14, 7, 3, 1 days
- Pre-filing checklists included
- Direct links to HMRC/Companies House
- Customizable reminder frequency
Tax Optimization by SIC
We analyze your SIC code to suggest industry-specific deductions, optimal salary/dividend splits, and expenses you're probably missing.
- Industry-specific deduction suggestions
- Optimal salary vs dividend calculator
- Missed expense alerts
- R&D tax credit eligibility checks
Bank Statement Import
Upload bank statements as CSV or PDF. We auto-detect your bank, parse every transaction, and categorize them with AI. Works with all UK banks.
- All major UK banks supported
- Auto-detect statement format
- AI-powered categorization
- Smart reconciliation with receipts
AI Chat with Your Books
Ask any question in plain English. 'How much did I spend on travel?' 'When is my CT deadline?' 'Can I claim my gym membership?' Get instant answers.
- Natural language questions
- Instant answers, not reports
- Context-aware responses
- HMRC rules knowledge built-in
Finn Runs on Cutting-Edge AI
Finn is powered by the best AI available — different models for different tasks, so you always get the most capable response. We continuously update as AI improves.
- Best-in-class AI for every task
- Vision AI for receipt scanning
- Specialized models per context
- Continuous capability updates
From Input to Insight in Seconds
Here's what happens when you brief Finn.
You Input Data
Snap a receipt, forward an email, ask a question, or sync your bank.
Finn Processes & Categorizes
Finn extracts data, categorizes every transaction against UK GAAP accounts, and updates your books instantly.
Issues Get Flagged
Personal expense on your business card? Missing receipt? Unusual amount? Finn spots it and flags it for your attention.
Finn Guides You to Fix It
Click 'Ask Finn' on any flagged item. He'll explain your options and walk you through the fix — Director's Loan, reimbursement, or whatever fits your situation.
Common Questions
Is Finn a replacement for an accountant?
For most small UK Ltd companies, yes. Finn handles bookkeeping, tax calculations, and filing preparation. For complex situations (audits, large transactions), you might still want professional advice — but Finn reduces that need significantly.
How secure is my financial data?
We use bank-level encryption, store data in EU data centers, and never share your information with third parties. Your data is never used to train AI models.
Do I need to be tech-savvy to use this?
Not at all. If you can take a photo or forward an email, you can work with Finn. The whole point is that you don't need to learn accounting software — just talk to Finn like you'd talk to an accountant.
What happens if I have questions Finn can't answer?
Finn is trained on UK tax law and HMRC guidelines. For edge cases, he'll tell you honestly and suggest consulting a professional. We'd rather say 'I don't know' than give bad advice.
You said
“How much have I spent on software this month?”
AccountsOS
You've spent £1,240 on software — Figma, GitHub, and 4 others. That's up £180 vs last month.
Tap the mic to ask anything
Your accountant, in your pocket
The AccountsOS mobile companion app. Chat with your books, snap receipts, and check your numbers — all from your phone.
Ready to Put Finn to Work?
Start your Free during Early Access. No credit card required.