HMRC-Recognised CT600 Software
Corporation Tax software that files your CT600.
#GoFile is HMRC-recognised Corporation Tax filing software. Prepare the CT600, generate iXBRL accounts and tax computations, and file your Company Tax Return online — without a heavyweight practice suite.
No card required · Set up free · Pay when ready to submit
The software checklist
What CT600 software needs to do.
HMRC’s free Company Tax Return service closed on 31 March 2026, so companies now need commercial software to file Corporation Tax online. Whatever software you choose, it has to cover four jobs — #GoFile covers all of them in one guided workflow.
Compare your options
Company Tax Return software vs the alternatives.
Most CT600 software is built for accountancy practices and priced accordingly. #GoFile is built so a small company — or an accountant with a mixed client base — can file Corporation Tax without paying for a full tax suite.
| What you need | #GoFile | Practice tax suites | Using an accountant |
|---|---|---|---|
| CT600 + iXBRL filing | Included | Included | Handled for you |
| Typical cost per year | From £49.99 | Often hundreds per year, licensed per practice | Commonly several hundred pounds per return |
| Built for non-experts | Guided, plain-English flow | Assumes tax-professional knowledge | No software needed, but you depend on their timetable |
| Pay only when you file | Prepare free, pay to submit | Licence paid up front | Fees agreed in advance |
| VAT, Income Tax & Payroll in the same account | Yes | Varies by module | Depends on the engagement |
From sign-up to submission
File Corporation Tax in four steps.
Create your free account
Add the company name, number and UTR. Setting up and preparing the return is free — you only pay when you are ready to submit.
Enter or import year-end figures
Work through the guided financial sections for the accounting period, or import figures to quick-fill the accounts and computation.
Review the Corporation Tax calculation
Check taxable profit, marginal relief, reliefs claimed and the tax due before anything is sent to HMRC.
Submit the CT600 online
#GoFile generates the iXBRL attachments and files the Company Tax Return directly with HMRC, then stores the confirmation.
Try the software before you pay anything.
Set up free, prepare the whole return, and judge the software on your own company’s numbers. When you are ready, file Corporation Tax online — you only pay at submission.
Start Your CT600 ReturnKeep researching
More on filing Corporation Tax.
Corporation Tax software FAQs
What people ask before choosing Company Tax Return software.
Is #GoFile HMRC-recognised Corporation Tax software?
Yes. #GoFile is HMRC-recognised software for Corporation Tax (CT600) filing, as well as for VAT and Making Tax Digital Income Tax.
Do I need software to file a Company Tax Return?
In most cases, yes. HMRC’s free Company Tax Return service has closed, so companies now file the CT600, accounts and tax computation online using commercial Corporation Tax software or through an accountant. Our guide on how to file a CT600 walks through the whole process.
What does CT600 software need to include?
Four things: the CT600 form and supplementary pages, a Corporation Tax computation, iXBRL-tagged accounts, and direct submission to HMRC’s Corporation Tax online service. #GoFile includes all four in one guided workflow.
How much does CT600 software cost?
#GoFile starts from £49.99/year for one active service. You can set up and prepare the return for free, and only pay when you are ready to submit to HMRC.
Can accountants use #GoFile for Corporation Tax?
Yes. Accountants can add Corporation Tax to a #GoFile agent plan, manage multiple companies from one practice dashboard, and file Company Tax Returns alongside client VAT, Income Tax and Payroll.
Does the software handle dormant or nil CT600 returns?
Yes. If HMRC has issued a notice to deliver a return, a dormant or loss-making company may still need to file a CT600. #GoFile supports nil and simple returns using the same guided workflow.