─── Specialist Micro-Entity Accountants In The UK

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

CT600 Tax Return Filing is the process of preparing and submitting a company’s Company Tax Return to HMRC so that its Corporation Tax position is reported accurately. For directors in Anglesey, professional support with CT600 Tax Return Filing means the accounting figures behind your accounts are reviewed, the tax adjustments that affect taxable profit are considered, and the completed return is submitted to HMRC with the supporting information it requires. It is important to understand that the CT600 is not the same as the statutory accounts you file with Companies House. Statutory accounts and the Company Tax Return are separate filing obligations, even though they draw on the same underlying bookkeeping. Good CT600 Tax Return Filing brings clarity to how your Corporation Tax position has been calculated, removes much of the administrative burden from directors who are already busy running a business, and gives you a clear record of what was submitted and why.

CT600 TAX RETURN FILING

(Turnover up to £100K)

£499.00

+vat

CT600 Return Preparation
Corporation Tax Computation
Tax Adjustment Review
Allowable Expenses Review
HMRC CT600 Filing
Filing Deadline Support

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Trusted by Micro-Entity Businesses Across the UK

From newly incorporated companies to established owner-managed businesses, our clients trust us to prepare their accounts accurately and handle their annual filing requirements.

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What Is a CT600 and How Does It Relate to Micro-Entity Companies?

There is no separate official form called a micro-entity CT600. A CT600 is simply the Company Tax Return that a company submits to HMRC to report its Corporation Tax position, and it is the same core return whether the company is large, small or a micro-entity. What differs is the accounting framework a company uses to prepare its accounts and the level of detail those accounts contain. A company that qualifies as a micro-entity may prepare accounts under a reduced disclosure framework such as FRS 105, but that choice does not by itself determine whether Corporation Tax is due or how much is payable, and it does not remove any obligation to file a Company Tax Return where HMRC requires one. Crucially, the CT600 is separate from the statutory accounts filed with Companies House: the accounts are a Companies House obligation, while the CT600 is an HMRC obligation, and the two are prepared for different audiences and purposes. In practice the two are related, because the figures in the accounts — together with the company’s accounting records — usually form the starting point for the Corporation Tax calculation. Taxable profit can differ from the accounting profit shown in the accounts, because the Corporation Tax computation may require adjustments, for example to add back disallowable expenditure or to deduct items treated differently for tax purposes. Not every micro-entity will owe Corporation Tax; whether any is payable depends on the company’s own circumstances and its taxable position. It is also worth keeping in mind that filing the CT600 and paying any Corporation Tax due are separate obligations that happen to share the same underlying figures.

What a Complete CT600 Submission Includes

The CT600 Form

Company details, accounting period, turnover, profit and the tax calculation.

Tax Computations

A working showing how accounting profit is adjusted into taxable profit.

iXBRL Accounts

Your statutory micro-entity accounts, machine-tagged to HMRC's taxonomy.

Supporting Schedules

Capital allowances, losses, directors' loans and any claims or reliefs.

─── OUR CT600 SERVICE

What's Included in Our CT600 Preparation Service?

Our fixed-fee service covers everything a qualifying micro-entity company needs to complete and file its Corporation Tax Return correctly and on time.

CT600 Return Preparation

Preparation of your Company Tax Return (CT600) from your bookkeeping records, ready for HMRC submission.

Corporation Tax Computations

Full tax computations showing how your taxable profit and Corporation Tax liability have been calculated.

Accounts & Tax Computation Support

Micro-entity accounts tagged in iXBRL format and attached to your CT600 as HMRC requires.

Allowances & Reliefs Review

We check capital allowances, allowable expenses and available reliefs so nothing is claimed twice or missed.

HMRC Filing & Deadline Tracking

Online submission to HMRC plus reminders for your payment and filing deadlines.

─── How It Works

How Our CT600 Tax Return Filing Service Works

Share Your Company Records

Provide the accounting records and relevant company information required to prepare the return.

Review Your Accounting Figures

Review the financial information and identify relevant Corporation Tax adjustments.

Prepare the CT600

Prepare the Company Tax Return and supporting tax computation based on the company's circumstances.

Prepare the CT600

Prepare the Company Tax Return and supporting tax computation based on the company's circumstances.

Review & Approve

You review the information and confirm the return before submission.

File With HMRC

Submit the Company Tax Return through the appropriate HMRC filing process.

─── WHY CHOOSE US

Why Choose Our CT600 Tax Return Filing Service?

We keep Corporation Tax simple, transparent and predictable for busy company directors, with fixed fees agreed before any work begins.

Micro-Entity Expertise

We work exclusively with small limited companies filing under FRS 105, so the CT600 is routine work for us.

Accurate Accounts Preparation

Every adjustment, disallowed expense and capital allowance claim is documented and explained in plain English.

Tax & Filing Support

Missed a deadline? We prepare overdue CT600 returns quickly to limit penalties and interest building up.

Clear Fixed-Fee Pricing

One transparent fee covers preparation, iXBRL tagging and HMRC submission of your Corporation Tax Return.

───WHO WE HELP

CT600 Support for Micro-Entities Across the UK

We support qualifying micro-entity companies across London and the UK, from one-director businesses to consultants and online companies.

One-Director Companies

Straightforward CT600 preparation for owner-managed limited companies with simple salary and dividend structures.

Limited Companies Run by Freelancers & Contractors

Corporation Tax returns for contractors trading through qualifying micro-entity limited companies.

Startups & Small Companies

First-year and dormant-to-trading CT600 filings for newly incorporated and growing micro companies.

CT600 Deadlines and Late Filing Penalties

Corporation Tax has two separate deadlines, and HMRC charges penalties that increase the longer a return stays outstanding.

How late the CT600 is	HMRC penalty
1 day late	£100
3 months late	A further £100
6 months late	HMRC estimates your tax bill and adds 10% of the unpaid tax
12 months late	A further 10% of any unpaid tax

Penalty levels are set by Companies House and may change. Separate HMRC penalties and interest apply to a late Corporation Tax return and unpaid tax. Check the updated guide here.

Let Us Handle Your CT600 Tax Return Filing in Anglesey

Preparing a Company Tax Return is rarely as simple as copying figures from your accounts. Taxable profit has to be worked out from accounting profit, adjustments need to be reviewed and documented, and HMRC expects the return to be accurate and the records behind it to be in order. That is where Micro Entity Accounts can help. We support businesses across Anglesey with CT600 preparation, Corporation Tax computation, review of the tax adjustments that affect your taxable profit, and submission of the Company Tax Return to HMRC, all handled with clear, transparent pricing and a straightforward process. If you would rather spend your time on the business than on the intricacies of your Corporation Tax position, get in touch and let us take your CT600 Tax Return Filing off your desk.

─── FAQs

Micro-Entity CT600 FAQs

Still unsure where you stand? Reach out to our UK team at info@microentityaccounts.co.uk and we will review your filing history with you.

What is a CT600?

A CT600 is the form used to submit a Company Tax Return to HMRC. It reports a company's Corporation Tax position for an accounting period, including the figures on which taxable profit has been calculated and, where applicable, the Corporation Tax due. The return also carries supplementary pages and supporting information depending on the company's circumstances, such as the nature of its income, any losses brought forward, or details of particular reliefs and allowances.

Is a CT600 the same as the statutory accounts filed with Companies House?

No. They are two separate filings with two different bodies. Statutory accounts are filed with Companies House and set out the company's financial position and performance in a prescribed format. The CT600 is filed with HMRC and reports the company's Corporation Tax position. The figures in the accounts often provide the starting point for the Corporation Tax calculation, but the accounts themselves do not satisfy the requirement to file a Company Tax Return, and filing a CT600 does not satisfy the requirement to file accounts.

Does a micro-entity company need to file a CT600?

It may do. There is no separate return for micro-entities, and a small or micro company can still be required to file a Company Tax Return if HMRC has issued a notice to deliver one, or if it has taxable profits or other circumstances that trigger a filing requirement. Filing obligations depend on the company's own position rather than on its size or accounting framework alone. Not every company will owe Corporation Tax, but that is a separate question from whether a return needs to be submitted.

Is a CT600 different from a Corporation Tax computation?

Yes. A Corporation Tax computation is the working paper that starts with the accounting profit shown in the accounts and applies the necessary tax adjustments to arrive at taxable profit and the resulting Corporation Tax liability. The CT600 is the return that reports the outcome of that computation to HMRC. The computation sits behind the return and is typically retained as part of the company's tax records rather than being a standalone statutory filing.

What information is needed to prepare a CT600?

In most cases you will need the company's accounts or a trial balance for the accounting period, the underlying bookkeeping and bank records, details of income and expenditure, information on any losses carried forward or brought back, and records supporting items treated differently for tax purposes, such as business entertainment, depreciation, or capital expenditure. Details of any payments already made towards Corporation Tax, and the company's registration details with HMRC, are also relevant. The exact list depends on the size and activities of the company.

How is taxable profit calculated from accounting profit?

Taxable profit usually begins with the accounting profit shown in the company's accounts, but it is not normally the same figure. The Corporation Tax computation adjusts that starting point — for example by adding back expenditure that is not allowable for tax, by accounting for capital allowances instead of depreciation, or by dealing with income and losses in the way tax rules require. The adjustments that apply vary from company to company, so the computation is prepared on the specific facts of the business rather than by applying a single formula.

Is filing a CT600 the same as paying Corporation Tax?

No, these are separate obligations. Submitting a Company Tax Return tells HMRC what the company's Corporation Tax position is, while paying Corporation Tax is the act of settling any liability that arises. A company can have a filing requirement without having a Corporation Tax liability to pay, and a company that owes Corporation Tax still needs to file its return. Keeping the two processes distinct helps avoid confusion about what has been submitted and what has been paid.

What happens if a company files its CT600 late?

HMRC expects returns to be submitted by the deadline that applies to the company, and a late Company Tax Return can lead to penalties and interest on unpaid tax. The exact consequences depend on the circumstances, how late the return is, and HMRC's published guidance, so it is better to address a delay early rather than leave it unresolved. If you think a return may be late, speaking to an accountant about your options is a sensible first step.