─── Specialist Micro-Entity Accountants In The UK

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

CT600 Tax Return Filing in Carmarthen is about making sure your company’s Corporation Tax position is worked out properly and reported to HMRC through the Company Tax Return. We help you pull together the figures from your accounting records, review the tax adjustments that may be needed to turn accounting profit into taxable profit, and submit the CT600 to HMRC on time. It is important to be clear that a CT600 is not the same as the statutory accounts you file with Companies House — they are separate obligations with separate purposes. Statutory accounts report your company’s financial position to Companies House, while the CT600 reports the company’s Corporation Tax position to HMRC. If you would rather focus on running your business in Carmarthen and the wider West Wales area than on Corporation Tax calculations and HMRC filing, we can handle the preparation and filing for you with clear communication at each stage and transparent, fixed-fee pricing.

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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 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 .

Is There Such a Thing as a Micro-Entity CT600? Understanding CT600 Filing for Small Companies

There is no separate official “micro-entity CT600” form. 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 form regardless of the size or accounting framework of the company completing it. What differs is the level of detail and the way the supporting figures are prepared. Micro-entity companies — those that qualify under the relevant company size thresholds and often prepare accounts under a simplified regime — may still have Corporation Tax obligations, and where HMRC requires a Company Tax Return, a CT600 will normally need to be filed. It is worth separating the different pieces: your statutory accounts (which may be prepared under a micro-entity framework and filed with Companies House) and your Corporation Tax filing (which goes to HMRC) are distinct requirements, even though they draw on the same underlying bookkeeping. Your accounting profit and your taxable profit are also not automatically the same figure. The tax computation may need adjustments — for example for disallowable expenditure, capital allowances or other tax-specific treatments — before the taxable profit and any Corporation Tax liability can be established. Whether Corporation Tax is actually payable depends on the company’s own circumstances and taxable position. Equally, filing the CT600 and paying any Corporation Tax due are two separate obligations: submitting the return does not itself settle a tax bill, and the payment process runs separately.

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 Carmarthen — Accurate, Organised and Submitted to HMRC

Preparing a Company Tax Return can feel far more complicated than it first appears. Stripping your accounting figures back to a taxable profit, tracking down the tax adjustments, and keeping the Corporation Tax records organised alongside everything else you have to file can quickly become a distraction from running the business. That is where Micro Entity Accounts comes in. We support companies in Carmarthen and across the surrounding area with CT600 preparation, Corporation Tax computation work, tax adjustment reviews, and submission of the Company Tax Return to HMRC — keeping the accounting records, the statutory accounts process and the tax filing clearly separated so you know exactly what has been done and what still needs doing. Get in touch with us to talk through your Corporation Tax position and get your CT600 Tax Return Filing underway.

─── 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. It reports the company's Corporation Tax position for an accounting period, showing the figures on which the tax position is based, such as turnover, allowable expenses and the resulting taxable profit, along with any Corporation Tax due and details of reliefs or allowances that apply. It is an HMRC document, not a Companies House document, and it is normally submitted online.

Who needs to file a CT600 Tax Return with HMRC?

A company may be required to file a Company Tax Return when HMRC has issued a notice to deliver one, and there are other circumstances in which a return is expected. Not every company will be in that position — a dormant or otherwise inactive company may have different obligations, and there are limited situations where a company may not need to file. Because the requirement depends on the company's own circumstances and on what HMRC has told the company, it is worth checking your specific position rather than assuming one way or the other. If you are unsure whether a CT600 is due for your company, we can review the position and confirm the next step.

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

Yes, and this is one of the most common misunderstandings. Statutory accounts are prepared under an accounting framework and filed with Companies House, and they report your company's financial performance and position. The CT600 is a tax return filed with HMRC that reports the Corporation Tax position. They use the same underlying accounting records, but they serve different purposes, go to different bodies, and can contain different figures. Preparing and filing one does not automatically take care of the other, so both obligations need to be tracked separately.

Is a CT600 different from a Corporation Tax computation?

They are closely connected but they are not the same thing. The Corporation Tax computation is the working paper that starts from the company's accounting profit and makes 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 work to HMRC. In practice you need the computation first, because the figures on the CT600 should be built on that calculation rather than taken straight from the accounts.

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

A micro-entity company can still have Corporation Tax obligations, and where HMRC requires a Company Tax Return, a CT600 will normally need to be filed. The absence of a separate micro-entity tax form is worth repeating: the CT600 is the same return for all companies, and what changes is the volume and complexity of the supporting information. Preparing accounts under a micro-entity regime does not by itself settle your tax position or determine what Corporation Tax is payable, and no accounting framework automatically decides the liability. The company's own trading activity, its accounting period and its taxable position all feed into whether Corporation Tax is due.

How is taxable profit calculated from accounting profit?

The starting point is usually the accounting profit shown in the company's accounts, but that figure is not automatically the taxable figure. The tax computation will normally add back items that are not allowable for tax purposes, deduct items that are treated differently for tax, and apply capital allowances and any other available reliefs. This can move the figure in either direction. Because the adjustments depend on your particular transactions and circumstances, the taxable profit has to be worked out case by case rather than inferred from the accounts alone.

Is filing a CT600 the same as paying Corporation Tax?

No — they are separate obligations. Filing the CT600 tells HMRC what the company's position is and reports the Corporation Tax that is due. Paying Corporation Tax is a separate process with its own deadline, and submitting the return does not discharge any amount owed. It is quite possible to have filed the return on time and still be dealing with a payment, or to have no Corporation Tax payable at all while still needing to report the position accurately.

What information do you need to prepare and file a CT600?

The main ingredients are the company's accounting records and draft accounts for the relevant accounting period, details of income and allowable expenditure, a breakdown of fixed assets and any capital expenditure, and information about other income, reliefs or allowances that may apply. Prior year figures and the previous return are also helpful for consistency. Once everything is to hand, we can work through the Corporation Tax computation, review the adjustments, prepare the CT600 and submit it to HMRC on the company's behalf. Starting early usually makes the process far smoother.