Everything a UK limited company director needs. Bank transactions to CT600 filing in one place. No accountant required.
No credit card required. First period free.
CATO handled over 1.5 million filings per year. Now every one of those companies needs to find an alternative. HMRC will not extend the deadline.
File your CT600 with NVC ComplyBuilt for single-director limited companies. Every step is guided, every number explained in plain English.
Import transactions directly from Starling, or upload a CSV from any UK bank. We support Barclays, HSBC, Lloyds, NatWest, Monzo, Tide and more.
Claude AI categorises your spending using UK tax rules. Salary, PAYE, expenses, stock. Everything placed in the right box before you even look at it.
We calculate your corporation tax automatically. Marginal relief, capital allowances, director loans: all handled. You review the numbers; we do the maths.
Submit your CT600 directly to HMRC and your annual accounts to Companies House in one workflow. iXBRL generated automatically for micro-entity and small company accounts.
Enter your Companies House number and we pull your details automatically. Takes 90 seconds.
Link your bank or upload a CSV. AI categorises everything using UK tax rules.
We flag anything that needs a decision. You confirm in a click. No accounting knowledge needed.
Submit your CT600 to HMRC and accounts to Companies House. We handle the iXBRL, you get a submission reference.
First accounting period free. No credit card required to start.
Join UK limited company directors who file without an accountant. Your first period is on us.
Start free today