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

A CT600 is the form HMRC uses for a Company Tax Return. It sets out a company's Corporation Tax position for an accounting period, including income, expenses, profits, tax adjustments and any Corporation Tax due. It is a tax filing made to HMRC, and it is not the same document as the statutory accounts a company files with Companies House. A CT600 is usually accompanied by a Corporation Tax computation and, in most cases, a copy of the company's accounts, so that HMRC can see how the figures in the return were arrived at.

A company normally needs to file a Company Tax Return when HMRC has issued a notice to deliver one, or where the company is within the charge to Corporation Tax for the period. This is determined by the company's own circumstances, so the starting point is always the position of the individual company and any correspondence received from HMRC. Companies that are dormant for Corporation Tax purposes, or that have had no notice to file, may have different obligations, and it is worth confirming the position rather than assuming either way. If you are unsure whether a CT600 is required for your company or for a particular period, it is sensible to check before the filing window closes.

Yes. Statutory accounts are prepared under the applicable accounting framework and filed with Companies House as a company law obligation. The CT600 is a Company Tax Return submitted to HMRC as a tax obligation. The two often share the same underlying accounting records, and the accounts figures frequently form the starting point for the Corporation Tax computation, but they serve different purposes, go to different bodies and can contain different figures once tax adjustments have been made. Filing one does not discharge the other, so both need to be dealt with separately.

No. The Corporation Tax computation is the working document that takes the company's accounting profit and adjusts it to reach taxable profit — for example by adding back expenditure that is not allowable for tax, adjusting for depreciation, or applying available reliefs and allowances. The CT600 is the return that reports the resulting figures to HMRC. They are prepared side by side and the computation normally supports the entries made in the CT600, but they are distinct pieces of work. Getting the computation right is often where the real detail of CT600 Tax Return Filing lies.

It can do. Micro-entity status relates to how a company's statutory accounts are prepared and filed, not to whether it has Corporation Tax obligations. There is no separate micro-entity CT600 form — the same Company Tax Return is used. Where HMRC requires a return for the period, a company that qualifies as a micro-entity will still need to file a CT600, supported by a computation based on its accounting records. Equally, not every micro-entity will have Corporation Tax to pay; that depends on the company's taxable position for the period.

Yes. A company can authorise an agent to prepare and file its Company Tax Return with HMRC, and many businesses choose to do this because of the detail involved in the computation and the record-keeping behind it. An agent will typically gather the accounting information, prepare the Corporation Tax computation, review the adjustments, complete the CT600 and submit it to HMRC. The company remains responsible for the accuracy of the information provided and for making sure any Corporation Tax due is paid, so keeping good records and sharing them promptly makes the whole process smoother.

Taxable profit starts with the accounting profit shown by the company's accounts, but it is rarely the final figure. The Corporation Tax computation adjusts that starting point: expenses that are not allowable for tax purposes are typically added back, depreciation is usually replaced with capital allowances where available, and other reliefs or adjustments are taken into account. The result is taxable profit, which is then used to work out the Corporation Tax position reported in the CT600. Because these adjustments depend entirely on the company's own transactions, two businesses with identical accounting profits can have quite different taxable profits.

No — filing and payment are separate obligations. Submitting the CT600 to HMRC reports the company's Corporation Tax position for the period; it does not itself transfer any money. Where Corporation Tax is due, the payment has to be made separately, and the deadline for payment is not necessarily the same as the deadline for filing the return. It is possible to file a CT600 on time and still incur interest or other charges if the associated payment is made late, which is why it helps to plan for both at the same time.