File your CT600 and company accounts yourself. Without the accountant's bill.
Your corporation tax return for HMRC and your micro-entity accounts for Companies House, prepared from one set of questions anyone who runs their own company can answer. And your whole tax position is there to see any day, not once a year. Built for small UK limited companies with simple affairs. £49 flat, covering both filings or either one alone. No subscription.
Takes most companies under an hour. You can stop and come back any time.
- Companies House authorised software filing
- Files directly to HMRC
Your whole tax position, live, any day of the year
Sign in and your Tax cockpit shows every company you run, with its corporation tax and National Insurance, and your own Self Assessment, all worked out together, with the deadlines coming up. So you decide salary and dividends before the year ends, rather than hearing about them months after it.
Your own Self Assessment files from here too, with your salary and dividends already filled in from the company: £25 when you file the company's CT600 with us, £35 on its own. It's free on GOV.UK and typically £150 to £400 plus VAT with an accountant.
More than one company? Companies under the same control share the corporation tax limits, connected companies get one Employment Allowance between them, and your Self Assessment covers your salary and dividends from all of them, so you see one true total.
Then connect ChatGPT or Claude and ask the questions you'd normally save for an accountant's meeting: what if I took a lower salary, paid this dividend after 5 April, or put more into my pension? Which company should pay my salary, or buy the van? Your AI works each option out with the same engines we file with, and you decide.
It's not regulated advice, and for anything complex we'll tell you to see an accountant.
Connect your AIHow it works
Find your company
Type your company number and we read your company name, registered office and accounting dates straight from the Companies House register, the same register your accounts are filed back to.
Check it fits
A two-minute eligibility check. If your company has anything that needs professional judgement, we tell you up front, before you have typed a single figure.
Enter your figures
Turnover, expenses, equipment bought, cash, money owed and any director’s loan. Plain questions about your company’s year, answered from your own records, and the tax computation updates live as you type. Or connect your AI and let it do the typing for you.
Review and file
See your full CT600, your micro-entity accounts and your tax computation exactly as HMRC and Companies House will receive them, then file with your own Government Gateway login.
Works with your AI
Work through it with Claude, ChatGPT or Claude Code
A.X.E.L Filing plugs straight into your AI assistant. Connect it once from your account and it works alongside you: it can look up your company, talk you through the eligibility check and help draft the figures from your records. Every draft lands in your account exactly as if you had typed it yourself. You review the CT600, the accounts and the computation, and you are the one who pays and presses Submit with your own Government Gateway login.
Your AI helps with the reading and the typing. The figures, and the return, stay yours.
Built for
- ✓ Active UK private limited companies (Ltd)
- ✓ Micro-entity accounts (FRS 105) filed to Companies House
- ✓ A single UK trade, or a dormant company
- ✓ Losses brought forward, AIA on equipment, marginal relief
- ✓ Overdrawn director’s loans, with the s455 tax on a CT600A
Not for
- ✕ Groups, R&D claims, property income or chargeable gains
- ✕ Companies above the micro-entity size limits
If your company is one of these, you need an accountant, and we will tell you so before you start, not after.
One filing, three documents
A complete company tax return is three things filed together: the CT600 form itself, your accounts, and your tax computation, the last two in HMRC's required iXBRL format. This tool prepares all three from the same answers and files them in one submission.
Guides
The mechanics accountants rarely explain, each on one page with a worked example.
What to have ready, when your first year is due, and every step of filing it yourself, with screenshots and a first year that needs two returns.
Made a loss this year but paid corporation tax last year? The claim many small companies never hear about.
Depreciation is not tax deductible. The Annual Investment Allowance is what replaces it, and it is usually better.
Between £50,000 and £250,000 of profit, every extra pound costs more than either headline rate. How marginal relief works.
Accounts at 9 months, tax money at 9 months and a day, the return at 12. And why Companies House filing does not count for HMRC.
Where the extra weeks come from, the 18-month ceiling, and when a first year means two CT600 returns rather than one.
See your company's numbers all year, not once, months after it ends. The two codes to request first, and what to ask your accountant for.
Check if your company qualifies
The eligibility check is free and takes two minutes.
Prepare your return