─── Specialist Micro-Entity Accountants In The UK

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

CT600 Tax Return Filing in Radlett is about getting your company’s Corporation Tax position right and reporting it accurately to HMRC. A CT600 is the Company Tax Return a UK company submits to HMRC to report its Corporation Tax position for an accounting period — it is not the same document as the statutory accounts filed with Companies House, and filing one does not satisfy the other. Professional support helps you bring together the figures from your accounting records, work through the tax adjustments that turn accounting profit into taxable profit, and submit the completed CT600 on your company’s behalf. Whether yours is a small or micro company with straightforward trading income or a business with more involved Corporation Tax reporting needs, the aim is to make the process clear and convenient, so you know what has been filed, what it was based on, and what needs your attention next.

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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 Trustindex verifies that the original source of the review is Google. I had a really positive experience with Muhammad. He was incredibly quick to action everything and made the whole process straightforward and stress-free. He took care of everything promptly and kept me informed throughout, which was greatly appreciated.

Muhammad was professional, responsive and genuinely helpful from start to finish. It was clear that he cared about providing a great service and making sure everything was handled properly. I would definitely recommend him to anyone looking for someone reliable, efficient and professional.
  
 
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 Trustindex verifies that the original source of the review is Google. I worked with Accotx on a HMRC reclaim and overall, they did ultimately deliver on their promise, which I appreciate. The process did take longer than any of us expected, partly due to external delays with the tax authorities, and partly because there were some hiccups in communication and follow-up. However, despite those challenges, they stayed professional and stuck to the original agreed terms. If you’re considering using them, be prepared to stay in regular contact to keep things moving along. They are absolutely capable, have the expertise and willing to work with you, and overall  improving their services over time. I would certainly return for any future needs.
  
 
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 Trustindex verifies that the original source of the review is Google. It was a pleasure working with Anum on our accounts. The whole process was swift and effortless, and it was one less thing to worry about. I'd highly recommend them.
  
 
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 Trustindex verifies that the original source of the review is Google. Accotax have been our accountants for many years now. We maintained them, because of their professionalism. In the last coiple of years, i have working with Imran, who has been very professional and helpful in guiding us through the whole process explaining and clarifying every aspect of it. Very prompt in responding to questions and patient with us even when we seem to be slow. I really enjoy working with him. Thank you
  
 
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 Trustindex verifies that the original source of the review is Google. I highly recommend Imran to anyone looking for a reliable and knowledgeable accountant. He helped me sort out a very complicated backlog of accounts and prepared my overdue tax returns with professionalism and attention to detail.

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 Trustindex verifies that the original source of the review is Google. Fabulous team at ACCOTAX - very efficient and good response time . Honest and professional with their work. I would highly recommend them even if you’re a young start up - or a large business they have it covered .

What Does a CT600 Mean for a Micro-Entity Company?

Micro-entity status is an accounting framework question. It affects how a company’s statutory accounts are prepared and filed, but it does not create a separate official tax return — there is no distinct “micro-entity CT600” form. Where a company is required to file a Company Tax Return, it does so on the standard CT600, and that applies to micro-entity companies just as it does to others. In practice, the accounting records and the statutory accounts are a natural starting point for the Corporation Tax computation that supports the CT600, because the accounts show the company’s accounting profit. Taxable profit, however, is calculated under tax rules rather than accounting rules, so adjustments — such as adding back disallowable expenditure or accounting for capital allowances and other reliefs — may be needed before the taxable profit and any Corporation Tax liability are confirmed. 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 separating the CT600 filing from the payment of Corporation Tax, since these are two distinct obligations with their own requirements.

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.

Ready to Get Your CT600 Tax Return Filing Sorted in Radlett?

Pulling together a Company Tax Return can quickly become the job you keep putting off — especially once you add Corporation Tax computations, tax adjustments and organised records to everything else on your plate. Micro Entity Accounts can take that off your hands. We help with CT600 preparation, Corporation Tax computation and tax adjustment review, and submission of your Company Tax Return to HMRC, all backed by clear, transparent pricing. If you would like your CT600 Tax Return Filing in Radlett handled properly and without the usual last-minute scramble, get in touch and we can talk through your company’s position and what is needed next.

─── 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 Company Tax Return that a company submits to HMRC, now filed online. It sets out the company's Corporation Tax position for an accounting period, including its taxable profit or loss, the Corporation Tax calculation and details of any reliefs or allowances being claimed. It is a tax filing that relates to the company itself rather than to its directors or shareholders personally, and it is separate from the statutory accounts a company prepares for its members.

Is a CT600 different from the statutory accounts filed with Companies House?

Yes, and the two are often confused. Statutory accounts are prepared under company law and filed at Companies House for the company's members and other users. A CT600 is a tax return submitted to HMRC. The figures in the accounts usually feed into the Corporation Tax computation that supports the CT600, but the accounts are not the CT600, and filing one does not discharge the other obligation. Many companies have both requirements running alongside each other, each with its own format and its own timetable.

Who needs to file a CT600?

Broadly, a UK company within the scope of Corporation Tax will need to file a Company Tax Return where it has a Corporation Tax liability or where HMRC has issued a notice to deliver a return for the relevant accounting period. Some companies with no taxable profit may still have a filing requirement, while others may not need to file at all. Because it turns on the company's own circumstances, it is worth confirming your position rather than assuming that no tax due means nothing to file.

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

It may well do. Micro-entity status describes the accounting framework used to prepare a company's statutory accounts; it does not exempt a company from Corporation Tax or from filing a Company Tax Return where HMRC requires one. If a micro-entity company is within the Corporation Tax system it may need to file a CT600, and if it has taxable profits it may also have Corporation Tax to pay — although that depends entirely on its own figures and circumstances.

Is a CT600 the same as a Corporation Tax computation?

No. The Corporation Tax computation is the working calculation that starts with the company's accounting profit, applies the relevant tax adjustments to arrive at taxable profit, and works out the Corporation Tax due. The CT600 is the return that reports the outcome to HMRC. The two go hand in hand in practice: a properly prepared computation is what makes the figures entered on the CT600 reliable, and it is also what supports your position if HMRC asks questions later.

How is taxable profit calculated from accounting profit?

The usual starting point is the profit shown in the company's accounts. That figure is then adjusted for tax purposes — for example by adding back expenses that are not allowable for Corporation Tax, deducting items treated differently under tax rules, and taking account of capital allowances and any reliefs the company can claim. The result is the taxable profit on which Corporation Tax is calculated. Because these adjustments vary considerably from one company to another, each computation has to be considered on its own facts rather than by applying a single formula.

Is filing a CT600 the same as paying Corporation Tax?

No — filing and payment are separate steps. Submitting the CT600 tells HMRC what the company's Corporation Tax position is, including how much tax is due or that no tax is due. Payment is a separate transaction with its own deadline, and you should not assume that filing the return settles the liability. Keeping both in view helps you avoid the situation where a return has been filed but the tax itself has not been dealt with.

Can someone prepare and file a CT600 on behalf of my company?

Yes. A company can appoint an agent to prepare its Company Tax Return and submit it to HMRC on its behalf. You remain responsible for the accuracy of the information the return is based on, which is why the process normally begins with a review of your records, your accounts and any relevant tax matters before the CT600 is finalised and filed. That review stage is also where tax adjustments and reliefs are considered, so nothing material is missed.