CT600 Tax Return Filing in Tenterden: Prepare and File Your Company Tax Return with HMRC

The CT600 is the form HMRC uses for a Company Tax Return. It is where a company reports its income, gains, deductions, reliefs and allowances for Corporation Tax purposes, and works through to the Corporation Tax position for the period. In practice, a CT600 is usually submitted online alongside supporting documents such as the company's accounts and a Corporation Tax computation, both prepared in the required digital format. The form is the same one used for all companies — it is not a special return reserved for any particular size or type of business.

Yes, they are separate documents with separate purposes and separate recipients. Statutory accounts are prepared for the company's members and filed at Companies House, and they follow an accounting framework with its own disclosure requirements. The CT600 is a tax return submitted to HMRC, reporting the company's Corporation Tax position. The two are related because your accounting figures normally feed into the tax return, but they are not interchangeable — and your CT600 Tax Return Filing can proceed on a different timetable from your Companies House filing obligations. A good filing process keeps both in step while recognising that each has its own rules.

It depends on the company's circumstances. If HMRC issues a notice to deliver a Company Tax Return, the company is required to file a CT600 for the period specified, even if no Corporation Tax ends up being payable. A company may also need to file a return in other situations, such as after trading has ceased or where there are outstanding matters HMRC expects to see reported. Companies that are dormant in the strict sense, or that have never traded, may not be in the same position, but the only safe way to know is to check your own company's status and the notices it has received. It is a common misunderstanding that preparing micro-entity accounts removes the need for a return — it does not.

Yes. The Corporation Tax computation is the working document that starts with your accounting profit and makes the adjustments needed to arrive at taxable profit and the resulting Corporation Tax figure. It shows, for example, which expenses are disallowed, how depreciation is treated, and what reliefs or losses are being claimed. The CT600 is the return itself, which summarises those results in the boxes HMRC expects. In most cases a computation accompanies the return, and HMRC may refer to it when reviewing the figures. Think of the computation as the reasoning and the CT600 as the formal submission.

You start with the profit shown in your accounts, then adjust it so it reflects the tax rules rather than purely accounting treatment. Typically that means adding back items that are not deductible for tax purposes, such as certain entertaining costs or expenses with a private element, and reversing accounting depreciation so the appropriate tax treatment for capital expenditure can be applied instead. Deductions, reliefs and losses brought forward may then reduce the figure where the rules allow. The outcome is taxable profit, and Corporation Tax is calculated on that amount rather than on the accounting profit. Rates and thresholds are set by the government and can change, so the current position should always be confirmed for the period you are filing.

No — filing and paying are separate obligations. Filing your CT600 is about telling HMRC what your company's taxable profit and Corporation Tax position are for the period, and there are deadlines attached to submitting that return. Paying any Corporation Tax due is a separate process with its own timetable, which can fall earlier than the filing deadline depending on the company's circumstances. It is possible to file a return showing no tax payable, and it is possible to owe tax for a period you have not yet filed. Keeping both dates in view is one of the practical advantages of having someone coordinate your CT600 Tax Return Filing for you.

As a starting point we would normally ask for your accounting records and final accounts for the accounting period, a trial balance or equivalent summary, details of income and expenses, and information about any assets bought or sold during the period, since the tax treatment of capital expenditure often differs from what appears in the accounts. It also helps to have your previous return, details of losses brought forward, records of any loans or transactions with directors or connected parties, and copies of any correspondence from HMRC. If any of this is missing, we can usually work with you to piece it together, but the more complete your records, the smoother and quicker the process tends to be.

Submitting a Company Tax Return after the deadline can lead to HMRC charging penalties and interest, and the amount can vary depending on how late the return is and how many filing obligations have been missed. Late filing can also slow things down if you are waiting on HMRC for confirmation of your position, and it may affect other administrative matters. Because the exact consequences depend on the individual company's circumstances, the most sensible step is to deal with any delay promptly — let HMRC know what is happening and get help preparing the return as quickly as possible. Filing accurately and as early as you are able remains the simplest way to avoid these complications.