─── Specialist Micro-Entity Accountants In The UK

CT600 Tax Return Filing in Ascot – Prepare and File Your Company Tax Return with HMRC

Every UK company that needs to report a Corporation Tax position has to send a Company Tax Return — the CT600 — to HMRC. Professional CT600 Tax Return Filing in Ascot takes the weight off that process: we work through your accounting records, review the figures for the tax adjustments that apply, prepare a clear Corporation Tax computation, and file the CT600 with HMRC on your company’s behalf. It is worth being clear from the outset that the CT600 is a separate filing from the statutory accounts you send to Companies House, even though both are built on the same underlying records. Accounts preparation and Corporation Tax filing are related but distinct jobs, and treating them as one can lead to gaps. Our approach is built on accuracy, plainly explained workings and a straightforward process that saves you time and keeps your Company Tax Return filing on a sound footing.

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.

      EXCELLENT  
   Based on 302 reviews 
    
 
 
 
   
 
 
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   Ayotunde Rufai 
 
 
 
 Trustindex verifies that the original source of the review is Google. Best accountants we've ever had. Umer is ace, and makes everything easy and transparent.
  
 
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   Sofia 
 
 
 
 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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   Zest For Life 
 
 
 
 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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   Pete Wrist 
 
 
 
 Trustindex verifies that the original source of the review is Google. Sterling work. Many thanks to Muhammad and the team for all their help and expertise
  
 
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   Hansen Personal Training 
 
 
 
 Trustindex verifies that the original source of the review is Google. We have been a client for years - very quick responsive and personalised service
  
 
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   Jamie Fletcher 
 
 
 
 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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   Mansur Liman 
 
 
 
 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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   Muna Mohamoud 
 
 
 
 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.

Throughout the process, he was incredibly patient, took the time to answer all of my questions, and explained everything clearly. He guided me through each step and helped rectify issues that had built up over time, making what felt like an overwhelming situation much more manageable.

I'm very pleased with the service I've received and truly appreciate his support. If you need help with your accounts or taxes, I would highly recommend Imran.
  
 
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   Sergey M 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a positive experience with Accotax. The work was completed promptly, my tax return was successfully filed, and I received a refund of overpaid tax. I found the cooperation efficient and helpful. Special thanks to Muhammad Saifullah for his assistance.
  
 
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   Ebba Qureshi 
 
 
 
 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 Is a Micro-Entity CT600 and How Does It Fit Into CT600 Tax Return Filing?

There is no separate official “micro-entity CT600” form. A company that qualifies as a micro-entity still reports its Corporation Tax position to HMRC using the same CT600 as any other company — what changes is how its accounts are prepared, not which tax return is filed. A micro-entity may be able to prepare simpler statutory accounts, often under the FRS 105 framework, but the choice of accounting framework does not by itself determine what Corporation Tax is due. Where HMRC requires a Company Tax Return, the company needs to submit a CT600, supported by a Corporation Tax computation that starts with the accounting profit shown in the accounts and adjusts it for items treated differently for tax purposes — for example disallowable expenditure, capital allowances, or income that is not taxable. The end result is the taxable profit, which is then used to work out the Corporation Tax liability, if there is one. That distinction matters: accounting profit and taxable profit are frequently not the same figure, and whether any Corporation Tax is actually payable depends entirely on the company’s own circumstances and taxable position. It is also worth separating two obligations that are often confused — filing the CT600 with HMRC and paying any Corporation Tax that falls due are separate steps with their own timings, so submitting the return does not automatically settle the tax.

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 Take Care of Your CT600 Tax Return Filing – Accurate Corporation Tax Reporting Without the Admin

Preparing a Company Tax Return can quickly become complicated: the accounting figures need reviewing, adjustments have to be identified and explained, and the resulting Corporation Tax computation has to line up with the CT600 before it goes to HMRC. If that is the part of running your company you would rather not be doing late at night, Micro Entity Accounts can help. We handle CT600 preparation, build the Corporation Tax computation from your accounts, review the tax adjustments with you, and manage the HMRC filing itself, so your records stay organised and your reporting stays consistent. Get in touch to talk through your company’s position and let us take the CT600 Tax Return Filing off your to-do list.

─── 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 formal name for a Company Tax Return. It is the return a UK company submits to HMRC to report its Corporation Tax position for an accounting period — the income, profits and gains it needs to account for, along with the resulting Corporation Tax due or repayable. The CT600 is normally supported by a Corporation Tax computation and, in most cases, by a copy of the statutory accounts for the same period. It is an HMRC document, not a Companies House document.

Who needs to file a CT600?

A company generally needs to file a Company Tax Return where HMRC has issued a notice to deliver one, or where the company has taxable profits, gains or other chargeable amounts to report. Some companies with no Corporation Tax to pay may still be required to submit a return, depending on their circumstances and on whether HMRC has asked for one. Because the position varies from company to company, it is worth checking your specific obligation rather than assuming a dormant or loss-making year means no filing is needed.

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

Yes — they are two separate filings with two separate bodies. The CT600 goes to HMRC and reports the company's Corporation Tax position. The statutory accounts go to Companies House and present the company's financial statements for the period. The accounts figures usually feed into the Corporation Tax computation, but the two documents serve different purposes, follow different rules in places, and are submitted independently. There are also other obligations, such as the Confirmation Statement and any VAT Returns, that sit entirely outside the CT600 process.

Is a CT600 the same as a Corporation Tax computation?

No. The Corporation Tax computation is the working that starts with the company's accounting profit and adjusts it to arrive at the taxable profit — adding back disallowable items, deducting allowances and reliefs where they apply, and dealing with income or expenditure that is treated differently for tax. The CT600 is the return form on which the resulting figures are reported to HMRC. You need the computation to complete the CT600 accurately, but they are not the same document.

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

Possibly. Being a micro-entity affects how the company's statutory accounts may be prepared — it does not exempt a company from Corporation Tax reporting. If the company has taxable profits, gains or other chargeable amounts, or if HMRC has issued a notice requiring a return, a CT600 will normally be needed. Whether Corporation Tax is actually payable depends on the company's own taxable position, and filing the CT600 is a separate step from paying any tax that is due.

How is taxable profit worked out from accounting profit?

The starting point is usually the profit shown in the company's accounts. From there, the Corporation Tax computation adjusts for items that are treated differently for tax: expenditure that is not allowable for tax purposes is added back, capital allowances may replace the depreciation charged in the accounts, and income that is not taxable or reliefs that are available are dealt with in the computation. The result is the taxable profit, which is then used to calculate the Corporation Tax liability. Because the adjustments depend on the company's transactions, the taxable figure can differ meaningfully from the accounting profit.

Is filing a CT600 the same as paying Corporation Tax?

No — they are two separate obligations. Filing the CT600 is about reporting the company's position to HMRC by the filing date that applies to the company. Paying Corporation Tax is about settling the liability, and the payment date can differ from the filing date. Submitting an accurate return does not automatically discharge the tax, and paying the tax does not remove the need to file. It is sensible to plan for both and keep records that support the figures in the return.

What happens if a company files its CT600 late?

If a Company Tax Return is filed after the applicable filing date, HMRC may charge penalties and may add interest or late payment charges on any Corporation Tax that remains unpaid. The amount involved depends on how late the return is, whether tax is outstanding, and the company's filing history, so the position is always specific to the circumstances rather than a single fixed figure. Beyond the cost, late filing tends to create knock-on admin — chasing correspondence, amending estimates and reconstructing records — which is why keeping the CT600 Tax Return Filing on schedule is usually the simpler route.