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

A CT600 is the Company Tax Return that a limited company submits to HMRC to report its Corporation Tax position for an accounting period. It captures income, allowable deductions, tax adjustments and the resulting taxable profit, together with the Corporation Tax calculated on that profit. CT600 Tax Return Filing is therefore the act of preparing that return and submitting it to HMRC. It is a tax filing rather than a set of published accounts, and it is used by HMRC to assess the company's Corporation Tax position.

Yes — CT600 is simply the name of the form used for the Company Tax Return. When people refer to the Company Tax Return, the Corporation Tax Return, or CT600 filing, they are generally talking about the same submission to HMRC. The CT600 is normally accompanied by a Corporation Tax computation and, in most cases, a copy of the statutory accounts, so that HMRC can see how the figures on the return were arrived at. In practice, CT600 Tax Return Filing means preparing all of that together, not just completing a single online form.

Yes, and the distinction matters. Statutory accounts are prepared under an accounting framework and filed at Companies House as a public record of the company's financial position and performance. The CT600 is a tax return filed with HMRC. They are separate obligations with separate filing routes, even though the accounts usually provide the starting point for the tax figures. A company can have filed its accounts correctly and still have CT600 Tax Return Filing outstanding, so it is worth tracking both to avoid one being overlooked.

They are related but not identical. The Corporation Tax computation is the working document that starts with the accounting profit shown in the accounts and applies the adjustments needed to reach taxable profit — for example, adding back expenditure that is not allowable for tax and applying the appropriate treatment for capital items. The CT600 is the return on which those resulting figures are reported to HMRC. Good CT600 Tax Return Filing therefore depends on a properly prepared computation, because the return should reflect the calculation rather than being completed in isolation.

It may do, depending on the company's circumstances. There is no separate micro-entity tax return — the CT600 is the same return used across companies — and a company that qualifies as a micro-entity for accounting purposes can still have Corporation Tax obligations. Preparing micro-entity accounts does not, by itself, decide whether Corporation Tax is payable or whether a return is required. If you are unsure whether your company needs to file, it is worth checking your position with HMRC correspondence or with an accountant who can look at your specific circumstances.

Yes. A director or company officer remains responsible for the accuracy of the return, but the preparation and submission of the CT600 can be handled by an accountant or tax agent acting on the company's behalf, usually through HMRC's online services. This is one of the main reasons companies look for professional CT600 Tax Return Filing support: it brings an experienced eye to the computation, the adjustments and the supporting records, and it reduces the internal admin burden on a busy director.

In broad terms, you need the company's accounting records and finalised accounts for the period, details of income and expenditure, information on capital purchases and disposals, records of any items that may need tax adjustment, and details of any reliefs, losses or other Corporation Tax matters relevant to the company. You also need the company's registration details for HMRC's online filing service. The exact list depends on what the company does and how it is structured, which is why the computation and the return are usually prepared together rather than separately.

No — they are separate obligations. Filing the CT600 tells HMRC what the company's taxable profit and Corporation Tax position are. Paying Corporation Tax is a separate step, with its own timetable, and filing the return does not automatically settle any liability. A company can also have a filing obligation even where no Corporation Tax is ultimately payable. It is worth keeping both dates and both tasks clearly on your annual compliance calendar so that CT600 Tax Return Filing and any payment are dealt with properly.

Filing after the relevant deadline can lead to HMRC penalties and interest, and the longer the delay the more serious the consequences tend to be. Because the rules and the outcomes depend on the company's particular circumstances and on HMRC's own processes, the practical response is to act quickly: check the position, prepare and submit the outstanding return as soon as possible, and consider speaking to an accountant who can help you get the filing back on track and, where appropriate, correspond with HMRC on your behalf.