Your accounts, finished.Not another tool to maintain.
Finn keeps the books current, prepares VAT, payroll and annual accounts, and brings you only the decisions that need approval.
Finnyour AI accountantMeanwhile, nobody asked Finn to
- Close July month-end, 148 transactions reconciled overnight
- Set aside £6,410 for corporation tax, due in 21 days
- Ask you for one missing receipt, on WhatsApp, at a sensible hour
15 inputs, one set of books. You never opened AccountsOS, there is a full ledger when you want it.
I love the innovative approach to accounting
I love the innovative approach to accounting, which can often be quite dull. I particularly appreciate how interactive it is, including the emails, reminders, and the ability to anticipate the next step.
Ksenija · SI
Great UI, fast response
Great UI, very quick at fixing any errors/bugs.
Mitch Edwards · GB
Work, completed
Finn does the work. You keep the judgement.
AccountsOS is built around a simple division of labour: AI handles the repeatable accounting work, people stay in control of decisions, approval and advice.
Send
Forward the evidence
Email, upload, snap or connect. Finn reads receipts, bills and statements.
Finn works
The books move forward
Transactions are matched, categorised and reconciled in the background.
You decide
Approve the exceptions
Finn asks only where judgement or permission is genuinely required.
Finished
Returns are ready
VAT, payroll, month end and annual accounts arrive prepared for sign-off.
The boring, important part
HMRC and Companies House,handled before they’re urgent.
Finn tracks every deadline your company actually has, prepares the return from the live ledger, and asks you to approve it. Nothing is submitted without you.
HMRC
Tax, filed on time
VAT · Making Tax Digital
Quarterly return built from reconciled books
7 Aug
Ready
PAYE · RTI
FPS filed on or before every payday
22 Jul
Scheduled
Corporation tax · CT600
Accrued monthly, so there's no year-end shock
1 Jan
£4,120 set aside
Self assessment
Salary and dividends carried across for directors
31 Jan
Tracking
Companies House
The register, kept correct
Annual accounts
Statutory accounts drafted from your ledger
30 Sep
Drafting
Confirmation statement
Register monitored, changes surfaced to you
14 Mar
Clear
Directors & PSC register
Appointments and shareholdings kept in step
—
Current
Year-end date
Every deadline recalculated if you change it
31 Dec
Set
90-second product film
Watch Finn finish the accounting work.
See receipts captured, questions answered, invoices chased and month end prepared, with approval kept where it matters.
- Evidence arrives through the tools you already use
- Finn prepares and explains the work
- You review the decisions, not every line
Automation you can account for
Fast enough to feel automatic. Clear enough to trust.
Finn is the execution layer. AccountsOS is the accounting system of record. People keep control of judgement, approval and advice.
See how your data is protectedA real ledger underneath
Every action lands in a double-entry accounting record, so reports and returns trace back to the underlying transaction.
Approval before submission
Finn prepares the work and explains what changed. You approve filings, payments and decisions before anything leaves AccountsOS.
A trail your team can follow
Source documents, AI suggestions, corrections and approvals stay connected, giving founders and practices a reviewable history.
Finn
Your AI accountant
Ask a question.Or give Finn the job.
Finn can explain the numbers, open the right client, prepare a return or reconcile the month. Conversation is the interface, but completed accounting work is the outcome.
Your books are reconciled to 30 June. Two things need you:
Review VAT return · £2,184 due
Prepared and ready for approval
Confirm one director expense · £86.40
Receipt matched, business purpose missing
Work you can verify
See what finished while you were building.
Every completed job shows the evidence Finn used, the result in your books and whether anything still needs you.
June books closed
184 transactions reconciled
2 exceptions approved
184 transactions reconciled
CompleteVAT return prepared
38 source records linked
Ready for your approval
38 source records linked
ReviewOverdue invoice recovered
Reminder sent and payment matched
No action needed
Reminder sent and payment matched
CompleteOne accounting system
The full job, connected underneath Finn.
Not a chat layer bolted onto separate tools. The work flows through one ledger, one audit history and one set of live numbers.
Banking
Reconciliation and rules
ExploreSales
Invoices, quotes and chasing
ExploreSpending
Bills, receipts and expenses
ExplorePeople
Payroll, RTI and dividends
ExploreTax
VAT, corporation tax and deadlines
ExploreReporting
Month end, P&L and balance sheet
ExploreSwitch without the rebuild
Bring the history. Start with books that already make sense.
Import from Xero, QuickBooks, Sage or your existing statements. Finn maps the records, shows you the proposed setup and keeps your opening position visible for review.
A guided start
- Import or start fresh
- Review the proposed account mapping
- See what needs attention before going live
Straightforward pricing
The whole job. One price.
No feature maze and no separate AI charge. Banking, books, payroll, VAT and reporting are included from day one.
For founders
Everything included. 14 days free, no card required.
Before you decide
The sensible questions, answered.
Can I trust the numbers?
AccountsOS keeps a full double-entry ledger. Finn links proposed work to the source records and asks for approval where judgement is needed.
Do I still need an accountant?
Many founders use Finn for routine bookkeeping, VAT, payroll and reporting. For complex tax planning or regulated advice, you can still bring in a chartered accountant.
Will anything file without me?
No. Finn prepares and explains the work; submissions and other important actions remain behind explicit approval.
Can I move from existing software?
Yes. Import from Xero, QuickBooks, Sage or statements, review the proposed mapping, and only then bring the opening position live.
Built for the agent era
AI agents are already finding AccountsOS.
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 your own AI to your books now. Claude today, Grok Build plugin submitted to xAI's marketplace.
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 crawler and assistant traffic. Access to your books is scoped, sensitive actions require approval, and financial totals are computed rather than generated.
Every screen
Finn, wherever you work.
The same Finn, the same books: a desktop app that sits in your dock, a Chrome extension beside whatever you're reading, and mobile on the way.
Accounting should end in done.
Give Finn the routine work. Keep your attention for the business, the client and the decisions that deserve it.