Alternatively, leaving your corporation tax filing for the last minute will lead to high cost errors, missed information, and unnecessary fines. Therefore, at OneTeam Chartered Accountants, we have made easy the whole process of completing and submitting your company tax return online. You won’t have to deal directly with HMRC, and you will never miss a deadline. Moreover, you will always pay the correct amount of Corporation Tax, that too without any stress.
Managing a business can be difficult at times, and we know that. Therefore, that is why OneTeam Chartered Accountants offers a stress free, all compliant monthly accountancy service to take the stress off you. Moreover, whether you are a start up, freelancer, limited company, or a small business, we manage your accounts efficiently and properly. Furthermore, our corporation tax return service is just one part of our efficient monthly accounting package. One that is made to have your financial management simple and stress free.
With one clear monthly cost, and no hidden fees, you get support from an expert team of accountants. We manage everything from book keeping to filing your corporation tax return properly and on time.
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A company tax return known as the CT600 must be submitted to HMRC by all limited companies at the end of their financial year. Moreover, your company’s accounting year end can fall on any month. This depends on when your business was started. Therefore, the corporation tax filing deadline is 12 months after the end of your accounting period. Missing this deadline will result in heavy fines.
Additionally, your Corporation Tax payment is due 9 months and 1 day after the end of your accounting period. So remember that it is important to file early. Our customers at OneTeam Chartered Accountants usually file well before the deadline for their complete peace of mind.
You can easily check your company’s year end date on the Companies House website. Furthermore, we can help you track all your key tax deadlines automatically.
The main purpose of a corporation tax return is to inform HMRC of your company’s taxable profits and the right amount of tax owed. Moreover, your taxable profit isn’t always the same as your accounting profit. This is due to allowable deductions and changes. Therefore, it is important that your corporation tax return is made by experts who know tax laws, deductions, and allowances.
Alternatively, with OneTeam Chartered Accountants, you can be confident that your corporation tax filing is done in full compliance with HMRC rules
Get in touch with our specialist team today and let us handle your accounts
Discover answers to frequently asked questions about our accounting services. Learn more about our offerings, processes, and how we can support your financial needs
A Corporation Tax Return (CT600) is a formal report submitted to HMRC by limited companies to declare their taxable profits, claim allowable expenses and reliefs, and calculate the amount of corporation tax due for the financial year. Every active limited company must file a CT600, even if it has no profit or tax to pay.
You can file a Corporation Tax Return online using HMRC’s online service or commercial accounting software. Filing requires your Government Gateway login, company tax reference, and full statutory accounts formatted in iXBRL. Many businesses prefer to file through accountants to ensure compliance and avoid costly errors.
The CT600 must be filed within 12 months of the end of your company’s accounting period. However, corporation tax payment is due earlier—usually 9 months and 1 day after the accounting period ends.
Missing the deadline results in automatic penalties from HMRC. These increase the longer the return remains overdue. If the delay was caused by a valid reasonable excuse, you may request an appeal, but it must be supported with evidence. Filing the return as soon as possible reduces additional penalties.
The cost varies depending on the complexity of your accounts, number of transactions, and required supporting documents. Typical fees range from £250 to £600+. OneTeam Chartered Accountants provides transparent, fixed-fee pricing once we review your company’s requirements.
Yes, you can file your own CT600 if you are comfortable preparing statutory accounts, understanding iXBRL formatting, and calculating taxable profits correctly. However, most companies work with accountants to avoid mistakes, ensure tax efficiency, and stay compliant with HMRC rules.
Yes. Small companies must file a CT600 even if profits are low or zero. Dormant companies must file a return only when HMRC sends a notice to deliver a tax return. If no notice is issued, dormant companies only file annual accounts with Companies House.
To complete a CT600, you will need:
Company accounts (profit & loss, balance sheet, director notes)
Bank statements and transaction records
Payroll and dividend records
Details of business expenses and allowable deductions
Company Unique Taxpayer Reference (UTR)
Any previous tax computations or losses carried forward
OneTeam Chartered Accountants guides you through the full documentation process.
OneTeam Chartered Accountants prepares your statutory accounts, calculates your taxable profits, completes your CT600, submits it to HMRC in the correct iXBRL format, and ensures compliance with all corporate tax rules. We also identify tax-saving opportunities, minimise errors, and reduce your risk of penalties.
Getting started is simple. Contact us via our website, email, or phone to schedule your initial consultation. We will review your company’s needs, outline the required documents, and begin preparing your corporation tax return. Our team supports you from start to submission.
Discover answers to frequently asked questions about our accounting services. Learn more about our offerings, processes, and how we can support your financial needs
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