CT600 Tax Return Filing in Ickenham — Prepare and File Your Company Tax Return with HMRC

A CT600 is the form used to submit a Company Tax Return to HMRC. It reports the company's turnover, income, allowable expenses, tax adjustments and the resulting Corporation Tax position for an accounting period. In practice, the CT600 is supported by a Corporation Tax computation and, usually, a copy of the statutory accounts, which together give HMRC the detail behind the figures on the return. The CT600 is a company-level tax filing, not a personal tax return.

A Company Tax Return is the return a company files with HMRC to report its Corporation Tax position for an accounting period. The CT600 is the form used to make that return, and it is normally accompanied by a Corporation Tax computation and the statutory accounts. A Company Tax Return deals with Corporation Tax only — it does not cover VAT, PAYE, or the accounts filed with Companies House, each of which has its own separate filing process and timetable.

Whether a company needs to file a CT600, and for which periods, depends on the company's circumstances — for example whether it is active for Corporation Tax purposes, whether HMRC has issued a notice to deliver a return, and whether any exemptions from filing apply. Because this is fact-specific, it is worth checking your position rather than assuming. If you are unsure whether your company falls within the filing requirement, professional advice based on your own company's activity and HMRC correspondence is the safest starting point.

Yes. Statutory accounts are prepared under an accounting framework and, for a limited company, filed at Companies House. A CT600 is a tax return submitted to HMRC and reports the Corporation Tax position. They are related — the accounts figures usually feed into the Corporation Tax computation — but they are separate documents with separate purposes, separate recipients and separate filing obligations. Filing your accounts does not mean you have filed your Company Tax Return, and vice versa.

They are connected but not the same thing. The Corporation Tax computation is the working schedule that starts with accounting profit, applies the relevant tax adjustments to arrive at taxable profit, and calculates the Corporation Tax position. The CT600 is the return form on which those results are reported to HMRC. In a well-prepared submission, the computation supports and explains the figures entered on the CT600.

There is no separate micro-entity CT600 — a micro-entity uses the same CT600 form as any other company, and whether it needs to file depends on its own Corporation Tax circumstances rather than its size classification. Qualifying as a micro-entity affects how the statutory accounts are prepared, often under FRS 105, but the accounting framework does not decide the Corporation Tax liability. A micro-entity may still have a Corporation Tax obligation where HMRC requires a return, and it may still owe no tax if its taxable position results in no liability — the two questions are answered separately.

Typically you will need the company's accounting records and draft or final accounts for the period, details of income and expenses, records of asset purchases and disposals for capital allowances purposes, any tax already paid or credits to account for, and the previous period's return where relevant. Details of the accounting period, company registration information and any HMRC correspondence also help. Because Corporation Tax calculations often involve adjustments, clear records of items such as business entertaining, depreciation and non-deductible costs make the preparation smoother and more accurate.

The calculation normally begins with the accounting profit shown in the company's accounts, and then adjustments are made to arrive at taxable profit. Common adjustments include adding back expenditure that is not allowable for tax, replacing depreciation with capital allowances, and accounting for income or expenses in the correct tax period. Timing differences and losses brought forward can also affect the figure. Because each company's circumstances differ, taxable profit frequently differs from accounting profit, and the Corporation Tax computation is where that reconciliation is set out.

No. Filing the CT600 and paying Corporation Tax are separate obligations. Submitting the Company Tax Return reports the company's position to HMRC, while payment of any tax due is handled through HMRC's payment arrangements and follows its own timetable. Filing a return on time does not itself discharge a tax liability, and a company with no tax to pay may still have a filing obligation where HMRC has required a return.

Yes. Directors remain responsible for the accuracy of the information submitted and for approving the return, but the preparation, computation work and submission of the CT600 can be carried out on the company's behalf. Many companies appoint an accountant to handle CT600 Tax Return Filing, which helps ensure the figures are consistent with the accounts, that adjustments are considered, and that the Company Tax Return is submitted to HMRC through the proper channel.

Late filing can lead to penalties and interest charges from HMRC, and the longer a return remains outstanding, the more the position can escalate. The exact consequences depend on the circumstances and HMRC's rules at the time, so it is best to deal with an overdue return promptly rather than leave it. If you have missed a filing date, getting the return prepared and submitted as soon as possible, together with clear records of what is owed, is usually the most practical way forward.