Books
Beta — Open beta — join the waitlist, we open seats in batchesBank feed reconciled automatically, with a chart of accounts built for UK company accounts, not a spreadsheet.
See the product →Beta — Open beta — join the waitlist, we open seats in batchesIncluded in Limited company · from £39/mo
Accounting software for limited companies
ac-co reconciles your company's books, files VAT under MTD, computes Corporation Tax with marginal relief handled automatically, runs payroll, and covers contracts and signatures — one ledger behind every filing.
In this stack
OBLIGATIONS CALENDAR
A year in your stack, with what we do on each date.
Every month
- Bank feed reconciledVAT, Corporation Tax and payroll all read from the same ledger.
Quarterly (VAT)
- MTD VAT return filedNine boxes, drafted from the ledger, with an HMRC receipt.
Your company's year end
- CT600 + iXBRL accounts filedCorporation Tax with marginal relief calculated automatically.
- Confirmation statement filed
Every pay run
- Payslips and RTI for up to 2 directors
Limited company
£39
or £390/yr, paid annually
- ✓VAT and CT600 + iXBRL included
- ✓RTI payroll for 2 directors included
- ✓1 SA100 included for a director
HOW IT FITS TOGETHER
From connected to filed.
01
One ledger for the company
Bank feed reconciled once — VAT, Corporation Tax and payroll all read from the same set of books, not three separate exports.
02
Each filing computed on its own rules
VAT under MTD, Corporation Tax with marginal relief between the small-profits and main rates, payroll through PAYE — each engine applies HMRC's actual rules to your figures.
03
You approve, then it files
Review the VAT return, the CT600 or the payslip run, then submit — nothing goes to HMRC or Companies House without your sign-off.
No sign-up — try it right here
Estimate your Corporation Tax.
Small-profits rate, main rate and marginal relief between them, worked out from your profit figure.
An estimate from the figures you enter, not a filed CT600 computation. Open the full calculator →
COMPARE
A limited company's three ways to get it filed.
| Row | Software only, e.g. Xero/QuickBooks | A high-street accountant | ac-co |
|---|---|---|---|
| £/year | Subscription only — files nothing | £1,068–£1,644/yr (£89–£137/mo) [Crunch — packages pricing, 2026-09-13] | From £39/mo, VAT + CT600 + payroll included |
| Hours/year | ~15 hours, plus filing yourself | ~3 hours, plus waiting | ~1 hour |
| Marginal relief calculated automatically | No | Yes | Yes |
| Payroll for directors included | No | Usually charged as an extra, per employee | Yes |
Accountant fee is a published package-pricing range, read 2026-09-13 — check your own quote.
YOUR STACK
Every part of ac-co built for this.
Each one carries its real status — no product here is described as more finished than it is.
VAT
Beta — Open beta — join the waitlist, we open seats in batchesQuarterly VAT returns drafted from the same books and filed under MTD.
See the product →Corporation Tax
Beta — Open beta — join the waitlist, we open seats in batchesCT600 computation with Corporation Tax marginal relief calculated automatically, plus the iXBRL accounts tag for Companies House.
See the product →Payroll
Beta — Open beta — join the waitlist, we open seats in batchesGross-to-net pay, payslips and P60s for directors and staff.
See the product →Legal
Beta — Open beta — join the waitlist, we open seats in batchesContract review and drafting with cited sources, for the agreements a growing company signs.
See the product →E-Sign
Beta — Open beta — join the waitlist, we open seats in batchesSend contracts and letters for signature, with the audit trail kept alongside the document.
See the product →Where to go next
OBJECTIONS
Before you sign up.
Is the Corporation Tax filing actually recognised by HMRC?
CT600 and iXBRL run in open beta on live company data; it's not yet on HMRC's recognised-software list the way our Self Assessment and VAT filing already are — we say so plainly rather than borrow that badge.
Can my accountant review before anything is filed?
Yes — invite them into the workspace; nothing goes to HMRC or Companies House without a sign-off.
What about capital allowances?
Capital allowances are part of the CT600 computation and applied from your recorded asset purchases, not a separate spreadsheet.
My company is dormant — do I still need this?
A dormant company still owes Companies House accounts and, usually, a nil CT600 — the plan covers both.
What happens to my data if I leave?
Export your ledger and filed returns at any time; nothing is locked in.
Sign in and see it on your own numbers.
Open beta — sign in and try it on your own organisation, still moving toward a full release.