Accounting Software Built Specifically for UK Limited Companies

Not adapted from US software. Not simplified from enterprise. Built from the ground up for UK Ltd company directors.

Save up to Same or less, plus hours of time back

AccountsOS is purpose-built accounting software for UK Ltd companies. It handles Companies House deadlines, CT600, dividends and director's loan accounts automatically via Finn, your AI accountant. £20/month + VAT all-in, 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

£20-50/month for Ltd-capable software

AccountsOS

£20/month + VAT with all Ltd features

You Save

Same or less, plus hours of time back

Free for 14 days • No credit card required

Sound familiar?

Using software designed for sole traders that doesn't understand Ltd company needs

Missing Companies House deadlines because your software doesn't track them

Manually calculating Corporation Tax and marginal relief

No proper dividend tracking or director's loan account management

There's a better way

AccountsOS understands UK limited companies inside out. Automatic Companies House deadline sync, Corporation Tax with correct marginal relief, dividend vouchers, director's loan tracking with S455 warnings, and proper UK Chart of Accounts. Finn, your AI accountant, handles all of it in the background. You just review and approve. £20/month + VAT, nothing extra.

Companies House deadline sync - never miss a filing

CT600 preparation with marginal relief calculations

Dividend voucher generation and tracking

Director's loan account with S455 tax warnings

UK GAAP compliant Chart of Accounts

Year-end accounts preparation

AccountsOS vs Typical accounting software

Feature	AccountsOS	Typical accounting software
Monthly cost	£20/month + VAT, all-in	£20-50/month, often + add-ons
Companies House sync	Automatic, deadlines tracked	Manual entry or not available
CT marginal relief	Calculated automatically	Often manual or not supported
Dividend vouchers	Generated and tracked in-app	Often not included
Director's loan (S455)	Tracked with automatic warnings	Basic or not supported
Answering tax questions	Ask Finn, instant reply	Support ticket or forum
Receipt handling	Photo/email/WhatsApp - done in seconds	Manual upload or paid add-on

Perfect for

Directors of UK limited companies

PSC (personal service company) owners

Small business directors managing their own accounts

Anyone fed up with software that wasn't designed for Ltd companies

Frequently Asked Questions

Why do I need Ltd company specific accounting software?

Limited companies have unique requirements: Corporation Tax instead of Income Tax, Companies House filings, dividend vs salary decisions, director's loan rules, and different expense categories. Generic software often gets these wrong or makes them harder than necessary.

How does the Companies House sync work?

AccountsOS connects to the Companies House API to pull your company details and filing deadlines automatically. Confirmation Statement due? Annual Accounts deadline? Corporation Tax filing date? All tracked and synced, with reminders before they're due.

Can it calculate my Corporation Tax correctly?

Yes, including the marginal relief calculations that trip up many founders. For profits between £50k and £250k, the CT rate isn't simply 25%. There's a complex relief calculation. AccountsOS handles this automatically.

What does AccountsOS cost?

£20/month + VAT, all-in. Every Ltd company feature is included: Companies House sync, CT600, dividends, director's loan, VAT/MTD, invoicing, and Finn. Try free for 14 days.

Ready to save Same or less, plus hours of time back?

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