Ct600 2025

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The document is the Company Tax Return (CT600) for accounting periods starting on or after April 1, 2015. It outlines the requirements for companies to file their tax returns, including necessary forms, supplementary pages, and information about income, deductions, and tax calculations. The document emphasizes compliance with filing deadlines to avoid penalties and provides detailed guidance on how to complete the return accurately.

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Click ‘Get Form’ to open the CT600 in the editor.
Begin by entering your company information in the designated fields, including the company name, registration number, and tax reference. Ensure accuracy to avoid penalties.
In the 'About this return' section, specify the accounting period by filling in the start and end dates. Mark any relevant boxes that apply to your return.
Proceed to complete the 'Accounts and computations' section. Attach necessary documents if required, and provide explanations if accounts are not attached.
Fill out the income and tax calculation sections carefully. Input figures for turnover, trading profits, and any deductions or reliefs applicable to your situation.
Review all entries for accuracy before submitting. Utilize our platform's features to save your progress or make edits as needed.

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Versions	Form popularity	Fillable & printable
2023	4.3 Satisfied (56 Votes)
2021	4.8 Satisfied (120 Votes)
2020	4.4 Satisfied (211 Votes)
2018	4.3 Satisfied (284 Votes)
2015	4.4 Satisfied (279 Votes)
2008	4.3 Satisfied (172 Votes)

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What are CT600 filing deadlines?

So, if your accounting year ends on 31 October 2025, your Corporation Tax bill must be paid by 1 August 2025 and the return completed by 31 October 2026. Missing this payment deadline can result in interest charges from HMRC, separate from any filing penalties for a late CT600.

Who needs to complete a CT600?

All companies registered in the UK with Companies House need to file a CT600 annually. Why? So that HMRC knows how much corporation tax youll need to pay on your profits. This includes limited companies, public limited companies (PLCs), and certain clubs, societies and associations that are liable for corporation tax.

What is the CT600?

Use this service to file your company or associations: Company Tax Return (CT600) for Corporation Tax with HM Revenue and Customs ( HMRC ) accounts with Companies House. Company Tax Return and accounts at the same time if theyre for the same accounting period.

When to file CT600?

HMRC require a Corporation Tax return (CT600) after the end of the accounting period. But as a CT600 can only report up to a maximum of 12 months, so you will need to file online two CT600s.

What is a CT600?

A CT600 form is part of a Company Tax Return. The form and other supporting documents constitute the Company Tax Return, which must be submitted to HMRC if a company receives a Notice to Deliver a Company Tax Return. Limited companies use the information in a CT600 form to calculate the Corporation Tax that they owe.

Is there CT600 filing software?

The CT600 Corporation Tax software includes CT600 and relevant supplementary forms as listed on the Features page. Data entry forms within the software are similar to HMRC forms, with some small variations, thus simplifying the form filling exercise.

Who needs to file CT600?

Every business thats registered in the UK with Companies House must submit a CT600 form every year as part of a Company Tax Return. Organisations that must complete the return include: Limited companies registered in the UK. Foreign companies with a UK branch or office.

Ct600 2025

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Ct600 2025

Here's how it works

How to use or fill out ct600 with our platform

See more ct600 versions

Complete this form in 5 minutes or less

Got questions?

What are CT600 filing deadlines?

Who needs to complete a CT600?

What is the CT600?

When to file CT600?

What is a CT600?

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People also ask

Is there CT600 filing software?

Who needs to file CT600?

Related links

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