Trading micro-entity limited companies
Enter income, costs, tax adjustments and balance sheet figures. We prepare the CT600, tax computation and accounts.
PRODUCT TOUR · Updated 4 October 2026
How it works: file your company tax in 5 steps.
Prepare your CT600 and supported accounts with a guided, step-by-step wizard. Upload prepared financial reports or enter your figures, review the documents and approve filing to your chosen destinations.
- No card required to preview
- CT600 v3 schema compliant
- Upload prepared reports or enter figures
CT600 and accounts filing for your company
Prepare your figures, review your documents and approve your filing. When you select Submit, the platform sends it using the credentials you enter. Support staff do not file it manually.
Property companies
Enter rental income and property expenses separately from any trading figures. Property company filing guide →
Dormant companies
Enter the balance sheet figures for dormant accounts. A nil CT600 can be filed when needed. Dormant company filing guide →
We also support eligible associated companies and companies limited by guarantee. For CICs, the platform sends the CT600 to HMRC after you approve it and prepares an accounts and CIC34 package for you to upload to Companies House. Follow the illustrated CIC filing guide.
CHECKLIST
Before you start: what you'll need.
Have these ready before you begin. Don't worry if you're unsure about some figures — the wizard explains each field as you go.
- Your company number — the 8-digit number from Companies House (e.g. 12345678).
- Your Companies House authentication code — the 6-character code Companies House posts to your registered office (request or reset it via Companies House WebFiling). Used to file your accounts.
- Your HMRC Government Gateway user ID and password — for the account enrolled for Corporation Tax for this company. Used to file your CT600. Recover them at gov.uk/log-in-register-hmrc-online-services.
- Your Corporation Tax UTR — the 10-digit reference from HMRC's Corporation Tax letters or your Business Tax Account.
- Your basic financial figures — turnover, expenses, and any other income for the accounting period.
- Your accounting period dates — the start and end dates of the period you're filing for.
01 — CONNECT
Connect your company.
Enter your company number and we fetch your details from Companies House instantly:
- Company name and registered address
- Date of incorporation
- Current directors
- Accounting reference date
- Filing history
You'll also enter your Companies House authentication code when you're ready to submit. It's used only for that submission and is never stored.
About 2 minutes
02 — INPUT
Enter your financial data.
Our guided wizard walks you through the information needed for your CT600 return and statutory accounts. The form is broken into clear sections:
Company profile and period
Choose your accounting period and select your company type (trading, dormant, or property income).
Tax-scope inputs
- Turnover (total sales / revenue)
- Cost of sales
- Operating expenses (rent, utilities, salaries)
- Interest receivable, dividends received and property income
- Other income with no row of its own (CT600 box 205)
- Depreciation and capital allowances
- Directors' remuneration
Community interest companies: your CIC34 report
On Financial Data, open CIC34 report for Companies House below Director’s loans and section 455 tax. Choose Simplified or Detailedand complete your report. Leave None selected if you are preparing it elsewhere. Follow the illustrated CIC34 guide →
Accounts data
- Balance sheet figures (fixed assets, current assets, creditors, share capital)
- Profit & loss confirmation
Each field includes a plain-English explanation. If a field doesn't apply to your company, you can leave it as zero.
10–20 minutes depending on complexity
03 — VALIDATE
Validate automatically.
Once you've entered your figures, our system runs four automatic validation checks:
Mathematical checks
Do your figures balance? Does the P&L reconcile with the balance sheet?
CT600 compliance
Every required CT600 box populated correctly against HMRC schema v3.
Tax calculation
Corporation tax computed across all applicable bands, including marginal relief.
iXBRL tagging
Accounts tagged against the correct FRS 105 taxonomy.
If any issues are found, you'll see clear error messages explaining what needs to be corrected.
Automatic (a few seconds)
04 — REVIEW
Review everything before filing.
Before filing, you can review and download everything that will be submitted:
- CT600 return (XML with all computed values)
- iXBRL statutory accounts (HMRC + Companies House tagged)
- Tax computation (step-by-step breakdown)
Review the summary to make sure everything looks correct. You can go back and edit any figures if needed — regenerating documents is unlimited and included in your subscription.
5 minutes
05 — FILE
Submit to your chosen filing destinations.
When you're satisfied with your documents, you're ready to submit:
- CT600 XML submitted to HMRC when selected
- Supported accounts submitted to Companies House when selected, with a separate upload package for CICs
- iXBRL accounts accompanying the CT600 submission
- IRmark receipt stored on your account
- Downloadable copies of all documents for your records
About 1 minute
What happens after filing?
For a CIC, your filing page shows Your Companies House package when you have prepared a CIC34 report with us. Select Download the package (ZIP), then upload it through the Companies House CIC accounts service. You pay Companies House its separate £15 fee. When you approve the CT600 filing, the platform sends it to HMRC.
- HMRC processing — HMRC typically processes CT600 returns within a few days. You'll see the filing reflected in your HMRC online account.
- Companies House: if you chose to file with Companies House, we submit your supported accounts and show the result. You can also download the generated iXBRL accounts file. CICs use the separate customer-uploaded package.
- Payment — Remember to pay your corporation tax by the deadline (9 months and 1 day after your accounting period end). We calculate the liability — you arrange payment to HMRC.
Use the prepared reports you already have
Upload trial balance, profit and loss or balance sheet exports from Xero or QuickBooks Online, or tabular CSV/Excel reports. Review automatic account recognition and change each mapping before use. This is a financial-report upload, not live syncing.
Follow the import steps →FAQ
Frequently asked questions about the process.
How long will preparing a filing take?
The time depends on your prepared figures and filing route. You can save a draft, return later and review every document before submission.
The filing process →Can I pause a filing and return later?
Yes. Saved filing inputs let you resume the supported draft. Review restored figures, dates and any allocations before continuing.
Preparing your filing →Can I change a draft before submitting?
Yes. Change your inputs and review the regenerated documents before approving the filing. An active annual subscription includes supported filings and amendments for the same company.
Annual filings and amendments →Can I download my prepared filing documents?
Yes. Download the supported CT600, accounts and tax computation files for review and your records. Available documents depend on the filing route, including whether accounts are generated or supplied by you.
PDF copies of filing documents →Ready to review your filing?
From £10 +VAT per company, per year. One flow for HMRC and Companies House — £10 +VAT dormant, £25 +VAT micro-entity.