─── Specialist Micro-Entity Accountants In The UK

CT600 Tax Return Filing in Llangefni: Professional Preparation and HMRC Submission of Your Company Tax Return

If your company needs to report its Corporation Tax position to HMRC, professional CT600 Tax Return Filing takes the guesswork out of the process. We support companies in Llangefni and across the UK with preparing their Company Tax Return, reviewing the accounting figures behind it, and submitting the completed CT600 to HMRC accurately and efficiently. It is important to understand that a CT600 is not the same thing as statutory accounts filed with Companies House — the accounts are a separate filing obligation, even where the same figures feed into the Corporation Tax calculation. Our approach is straightforward: clear, transparent pricing, a knowledgeable point of contact, and practical support with the tax adjustments that can turn accounting profit into taxable profit. Whether you are filing for the first time or want a second pair of eyes on a more complex period, we aim to make your Corporation Tax reporting clearer, better organised and far less of a burden on your time.

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 300 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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 .
  
 
      Posted on Google  
   
   Mael Leboucher 
 
 
 
 Trustindex verifies that the original source of the review is Google. We worked with a few different accountants before finally settling with Accotax, and we’re really glad we did. Their team is great. Abdul is responsive and easy to reach whenever I have a question, which makes a big difference. They take the time to understand how our business works and what our needs are. They are very knowledgeable, and when they don’t have the answer straight away, they take the time to look into it and get back to us quickly. Anum, who looks after our account on a day-to-day basis, including reconciling invoices and preparing the annual accounts, is amazing. She is professional, efficient, and follows the processes we have put in place together. She's also very quickin getting back to us whenever needed. We’re very happy to work with her and hope to continue doing so for as long as possible. Overall, Accotax has made our accounting experience much smoother and easier. We see them as a long-term partner as our business continues to grow. I would 100% recommend them.
  
 
      Posted on Google  
   
   3rd Hub 
 
 
 
 Trustindex verifies that the original source of the review is Google. Imran provides a very dependable and straightforward accounting service. He is always responsive and professional when managing our accounts. Excellent support.
  
 
      Posted on Google  
   
   Martin Tyrrell 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have really impressed to date with all dealings with Accotax highly enough. From day one, they've made what can often be a complicated and stressful part of running a business feel straightforward and hassle-free. A special mention has to go to Anum, who has been friendly, incredibly responsive, and genuinely cares about providing the best possible service. No question is ever too much trouble, and she consistently goes above and beyond to make sure everything is dealt with efficiently. I wouldn't hesitate to recommend you to anyone looking for an accountant they can genuinely trust.
  
 
      Posted on Google  
   
   Matthew Lyon 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great speedy service and very personable. Anum dealt with my income certificate and did everything quickly and helped me out massively. Very happy with the service provided.

What Is a Micro-Entity CT600? How CT600 Tax Return Filing Works for Micro-Entity Companies in Llangefni

There is no separate official “micro-entity CT600” form. A CT600 is the standard Company Tax Return used to report a company’s Corporation Tax position to HMRC, and micro-entity companies use exactly the same form as any other company where they have a filing obligation. What makes a micro-entity different is usually the accounting framework it applies and the level of detail in its statutory accounts, not the tax return itself. A company that qualifies as a micro-entity may still have Corporation Tax obligations and, where required, will need to submit a Company Tax Return to HMRC. That return is separate from the statutory accounts filed with Companies House, although the company’s accounting records and accounts often form the starting point for the Corporation Tax calculation. This is where the distinction between accounting profit and taxable profit matters: taxable profit can differ from the profit shown in the accounts because the Corporation Tax computation may require adjustments, such as adding back disallowable expenditure or deducting allowable items that were not treated as expenses in the accounts. Applying a particular accounting framework, such as FRS 105, does not by itself determine whether Corporation Tax is payable or how much. Equally, every micro-entity is in a different position — some may have no Corporation Tax to pay for a given period — and the obligation to file a CT600 is not the same as the obligation to pay Corporation Tax, which is handled separately. Working through this properly, with preparation and Corporation Tax filing treated as related but distinct processes, helps ensure the figures reported to HMRC are accurate and consistent with the accounts.

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.

Make Your CT600 Tax Return Filing Straightforward, Accurate and Stress-Free

Preparing a Company Tax Return can quickly become complicated — particularly when you need to move from accounting profit to taxable profit, decide which adjustments apply, and keep your Corporation Tax records organised alongside everything else your company has to file. Micro Entity Accounts helps take that weight off your shoulders. We can assist with CT600 preparation, a clear Corporation Tax computation, a review of the tax adjustments behind your taxable profit, and submission of your Company Tax Return to HMRC, all supported by clear, transparent pricing and a friendly point of contact who explains things in plain English. If you are in Llangefni and want your CT600 Tax Return Filing handled properly, get in touch with us today and let us guide you through the next steps.

─── 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 the company's income, gains, deductions and reliefs for an accounting period and sets out the company's Corporation Tax position for that period. The CT600 is normally submitted as part of the wider Company Tax Return, which will usually also include the company's statutory accounts and a Corporation Tax computation, depending on the company's circumstances.

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 income, profits or gains that must be reported. Whether a specific company has a filing obligation depends on its own circumstances, including whether it has been trading, whether it has any taxable activity, and whether HMRC has asked it to file. If you are unsure whether a CT600 Tax Return Filing obligation applies to your company, it is sensible to check HMRC's guidance or take professional advice rather than assume.

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

Yes — they are two separate filings with two different organisations. Statutory accounts are filed with Companies House and deal with the company's financial reporting obligations. A CT600 is filed with HMRC and reports the company's Corporation Tax position. The figures in the accounts often feed into the Corporation Tax calculation, but the filings are made separately and serve different purposes, so completing one does not discharge the other.

Is a CT600 different from a Corporation Tax computation?

Yes. The Corporation Tax computation is the working document that starts with the company's accounting profit, applies the necessary tax adjustments, and arrives at the taxable profit and the resulting Corporation Tax liability. The CT600 is the form on which the resulting figures are reported to HMRC. In practice the computation supports the return, and both are usually prepared together as part of the same Corporation Tax filing exercise.

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

It may do. Being a micro-entity affects the accounting framework and the presentation of the statutory accounts, not whether the company has Corporation Tax obligations. A micro-entity company that has taxable profits or that has been asked by HMRC to file will normally need to submit a Company Tax Return in the same way as any other company. It is also worth remembering that not every micro-entity will owe Corporation Tax for a given period, and that filing the return and paying any tax due are separate matters.

What information is needed to prepare a CT600 for filing?

We typically need the company's year-end accounts or trial balance, details of income and expenditure for the accounting period, capital allowances information, any other reliefs or adjustments that may apply, and the company's registration details for HMRC. Where the company has been trading in more than one accounting period, previous computations can help ensure consistency. The exact information required varies from company to company, so it is worth discussing your circumstances before you start gathering records.

How is taxable profit calculated from accounting profit?

The starting point is usually the accounting profit shown in the company's accounts. From there, adjustments may be needed — for example adding back expenditure that is not allowable for tax, deducting items that are allowable but were not treated as expenses in the accounts, and reflecting capital allowances or other reliefs. The adjusted figure is the taxable profit on which Corporation Tax is calculated. Because these adjustments depend on the company's own transactions, the taxable profit will often differ from the accounting profit.

Is filing a CT600 the same as paying Corporation Tax?

No. Filing a CT600 is a reporting obligation — it tells HMRC what the company's position is for the period. Paying Corporation Tax is a separate obligation, with its own arrangements for how and when any liability is settled. A company can have a CT600 to file even where no Corporation Tax is payable, and conversely, the tax due must still be paid through the correct process regardless of when the return is submitted.