For accounting practices
Take the next fifty clients.Not the next hire.
Finn works every client book continuously, reconciling, closing the month and drafting the returns, then brings your team the exceptions. You review and sign. The compliance grind stops setting your client ceiling.
No demo · no sales call · 14 days free, no card
94
Live clients
31
Deadlines this quarter
88
Reconciled to today
6
Need a human
Overnight, across the book
1,206 transactions categorised across 94 clients
Every connected feed, every client's rules
312 receipts collected and matched
From client inboxes, WhatsApp and email forwarding
41 customer payments matched to invoices
Marked paid, reminders cancelled, clients told
12 VAT returns drafted for the 7th
Prepare with Finn ran the whole VAT group
88 books reconciled to today
6 blocked. Each blocker named, none guessed
For your team today
VAT · 7 Sep
Corp tax · 30 Dec
12 to reconcile
Bank feed gap 3 to 9 Aug, ask the client
Accounts · 30 Dec
VAT · 7 Sep
Finn does the production work. Your team keeps the judgement, the client relationship and the sign-off.
£12
per live client + VAT, from client 1. No minimum.
£1.50
per dormant file + VAT on the Ledger tier, any volume.
100+
clients and volume discounts apply automatically.
Pro rata
billed by the day a client is live. Remove one and it stops.
You pay, never your clients. Bundle it into your fee however you like, and the price does not climb every September the way Xero’s and QuickBooks’ have.
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.
Portfolio
See the whole book
Deadlines, missing records and unreconciled work across every client.
Prepare
Run work in batches
Ask Finn to prepare VAT or annual accounts across the selected clients.
Review
Work the exceptions
Ready, blocked and failed work is separated with the exact reason why.
Sign off
Keep professional control
Nothing files without approval. Your team owns the judgement and client advice.
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 Sep
Ready
PAYE · RTI
FPS filed on or before every payday
22 Sep
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
Ongoing
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.
11 clients are overdue. I prioritised them by days late and found 7 I can prepare now.
Work you can verify
See the work move across the whole book.
Prepared, blocked and ready work stays separated, with the evidence and next owner visible to your team.
47 client months prepared
39 ready, 8 blocked with reasons
Review the exceptions
39 ready, 8 blocked with reasons
Prepared12 VAT returns prepared
Source records and changes listed
Manager sign-off required
Source records and changes listed
ReviewPilot client mapped
Trial balance and opening items checked
Approve the import plan
Trial balance and opening items checked
PreparedOne 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
ExplorePilot before you migrate
Prove the workflow with one client before moving the whole book.
Move a pilot client, inspect the mapping and review the prepared work with your team. Scale into batch migration only when the process is proven for your practice.
A controlled practice pilot
- Choose one representative client
- Review before anything posts
- Agree the rollout plan with your team
Straightforward pricing
The whole job. One price.
Pricing follows live client companies, with unlimited team members and no separate charge for Finn across the portfolio.
For practices
No minimum. Automatic volume pricing, billed per day a client is live.
Before you decide
Control stays with your practice.
Can we review every AI action?
Yes. Source documents, suggestions, corrections and approvals remain connected in a reviewable audit history.
Will clients have to learn another product?
No. Your team can run the books without client logins, or selectively invite clients when uploads and questions benefit from a shared workspace.
How risky is migration?
Start with one representative client. Review the mapping and prepared work before anything posts, then agree the wider rollout with your team.
Does Finn replace professional judgement?
No. Finn prepares repeatable work and surfaces exceptions. Your team retains sign-off, judgement and the advisory relationship.
Built for the agent era
The AI-native one. And it shows.
You already use AI every day. Your ledger software has not noticed. AccountsOS is built the way the AI tools you use are built: Finn runs on Claude Sonnet and Gemini, your own AI can connect to your clients' books today, and when practices run on agents, those agents will talk to Finn directly.
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.