CT600 Tax Return Filing in Sunningdale: Preparing and Submitting Your Company Tax Return to HMRC

A CT600 is the form used to submit a Company Tax Return to HMRC. It sets out the company's Corporation Tax position for an accounting period, including details such as the company's income, allowable deductions, profits chargeable to Corporation Tax, reliefs and the tax payable. It is a tax filing made to HMRC, not a Companies House filing, and it is normally submitted online using HMRC's Corporation Tax service. A CT600 works alongside a Corporation Tax computation, which shows how the figures in the return were calculated.

A Company Tax Return — filed as a CT600 — is the document a company sends to HMRC to report its Corporation Tax position for an accounting period. Statutory accounts are a different document altogether: they are prepared under company law and filed with Companies House. The two are linked because the accounts usually provide the starting figures for the tax return, but they serve different purposes, go to different authorities and are subject to different rules. Filing statutory accounts with Companies House does not discharge the obligation to file a Company Tax Return with HMRC, and vice versa.

Broadly, a company may need to file a CT600 where it is within the charge to Corporation Tax, or where HMRC has issued a notice to deliver a Company Tax Return. There are also situations where a return is required even if no tax turns out to be payable — for example, because losses or reliefs reduce the taxable profit to nil. Because the requirement depends on the company's own circumstances and on whether HMRC has asked for a return, it is worth checking your position rather than assuming that a dormant or very small company has nothing to do.

Yes. The computation and the return are two related but distinct documents. The Corporation Tax computation is the working paper that starts with the company's accounting profit per the accounts and applies the relevant tax adjustments to arrive at the taxable profit and the resulting Corporation Tax liability. The CT600 is the return form that reports those figures to HMRC. In practice they are prepared together and submitted together, but the computation is the calculation and the CT600 is the filing.

It can. Micro-entity status is an accounting classification that allows a qualifying small company to prepare accounts under a simplified framework. It does not remove Corporation Tax obligations and it does not create a separate 'micro-entity' return. If HMRC has issued a notice to deliver a Company Tax Return, or the company has circumstances that require a return, the company still needs to complete a CT600. Whether any Corporation Tax is actually payable is a separate question that depends on the company's taxable profits, reliefs and losses.

The two obligations run alongside each other rather than being interchangeable. A Company Tax Return generally relies on accounts and a tax computation to support the figures reported, and HMRC expects the company to have prepared the underlying records properly. Separately, the statutory accounts must be filed with Companies House by the relevant deadline for that filing. Completing a CT600 does not satisfy the Companies House requirement, and filing accounts at Companies House does not satisfy the HMRC requirement. Companies often handle both together so that the figures are consistent.

The starting point is usually the accounting profit shown in the company's accounts. Adjustments are then applied to reach the taxable profit. These commonly include adding back expenditure that is not allowable for tax purposes, deducting income that is not taxable, replacing accounting depreciation with capital allowances, and taking account of reliefs or losses brought forward where the rules allow. Because the adjustments depend on the nature of the company's transactions, the taxable profit can be higher or lower than the accounting profit — and a company's choice of accounting framework, such as FRS 105, does not by itself determine its Corporation Tax liability.

No, these are separate obligations. Filing the CT600 reports the company's Corporation Tax position to HMRC. Paying Corporation Tax is a separate step, and the payment deadline can differ from the filing deadline, so submitting the return on time does not automatically mean the tax has been dealt with. A company should always check what is payable, if anything, and when the payment is due based on its own circumstances and HMRC's guidance.

Yes. Company directors can authorise an accountant or agent to act on the company's behalf, which typically includes preparing the Corporation Tax computation, completing the CT600 and submitting it to HMRC online. The company remains responsible for the accuracy of what is filed, which is why a good agent will work from your records, ask questions about unusual items and explain the basis of the figures before submission. In Sunningdale and across the surrounding area, this is one of the most common ways companies manage their CT600 Tax Return Filing.