Accounting Software That Understands Agency Life
Multiple clients, project billing, retainers, scope creep. AccountsOS makes sense of the chaos. Finn runs your books while you run your clients.
AccountsOS is accounting software built for UK agency owners: Finn tracks client profitability, retainers, project costs, and contractor payments in the background, so you always know which clients make money. £20/month, 14-day free trial.
Not sure if AccountsOS is right for you?
Ask Finn anything about how it compares or what it would do for your business. No signup needed.
Traditional Cost
£30-60/month for project-capable accounting
AccountsOS
£20/month with client and project tracking
You Save
Up to £480/year, plus hours of admin back
Free for 14 days • No credit card required
Sound familiar?
No visibility into which clients are actually profitable
Retainer income mixed up with project billing
Contractor costs impossible to attribute to the right client
Generic accounting that doesn't understand agency workflows
There's a better way
AccountsOS is built for agency owners. Track income and expenses by client and project. See which clients make money and which cost you money. Manage retainers separately from project work. Finn handles the bookkeeping in the background: receipts, invoices, bank reconciliation, VAT. You get the clarity without the admin. £20/month, everything included.
Client profitability tracking: income vs expenses per client
Project-based accounting: see if projects actually make money
Retainer management: track recurring client income separately
Multi-client invoicing: professional, branded invoices
Expense allocation: assign costs to specific clients
Contractor payments: track outsourced work by project
AccountsOS vs Generic accounting software
| Feature | AccountsOS | Generic accounting software |
|---|---|---|
| Monthly cost | £20/month, everything included | £30-60/month for project-capable plans |
| Client profitability view | Built in: income vs expenses per client | Manual reports or expensive add-ons |
| Project tracking | Assign costs and income to projects natively | Limited or requires third-party integration |
| Retainer vs project revenue | Tracked separately, visible on dashboard | All revenue in one bucket by default |
| Contractor cost allocation | Assign contractor invoices to clients and projects | Manual or not supported |
| AI answers about your agency numbers | Ask Finn in plain English, instant reply | Run reports yourself |
| Receipt and expense handling | Snap or forward, Finn processes and allocates | Upload and categorise manually |
Perfect for
Marketing and creative agency owners
Digital agency founders
Consultancy firm directors
Any service business with multiple ongoing clients
Frequently Asked Questions
How does client profitability tracking work?
Can I track retainers separately from projects?
How do I handle contractor payments?
What about clients who pay late?
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
Ready to save Up to £480/year, plus hours of admin back?
Join UK founders who've switched to smarter, more affordable accounting.
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