─── Specialist Micro-Entity Accountants In The UK

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

CT600 Tax Return Filing is the process of preparing and submitting your company’s Company Tax Return to HMRC, setting out your Corporation Tax position for the accounting period. For businesses in Chiswick and across West London, working with an experienced team makes that process clearer and far less stressful: we help pull together the figures from your accounting records, review the tax adjustments that turn accounting profit into taxable profit, and prepare the CT600 itself so the return reflects your company’s circumstances accurately. It is important to remember that a CT600 is not the same thing as your statutory accounts. Statutory accounts are filed separately at Companies House, while the CT600 is filed with HMRC — the two are related but distinct obligations, and one does not replace the other. Good professional support means fewer loose ends, a better-organised Corporation Tax file, and the confidence that your Company Tax Return has been prepared carefully rather than rushed at the last minute.

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  
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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. 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?

There is no separate “micro-entity CT600” form. The CT600 is the standard Company Tax Return used to report a company’s Corporation Tax position to HMRC, and it applies regardless of the size or accounting framework of the company completing it. A micro-entity company may still have Corporation Tax obligations and, where HMRC requires it, needs to submit a Company Tax Return. Under the micro-entity regime, the statutory accounts filed at Companies House can be prepared in a simplified form, but that is a separate filing obligation from the CT600 submitted to HMRC. Where a return is required, the company’s accounting records and accounts often form the starting point for the Corporation Tax calculation — and that calculation may need adjustments. Accounting profit and taxable profit are not automatically the same figure, because items such as disallowable expenses, capital allowances or other tax-specific treatments can move the numbers in either direction. Importantly, filing a CT600 and paying Corporation Tax are two separate obligations: submitting the return reports the position, while any payment due depends on the company’s own taxable position and circumstances. Some companies will owe nothing; others will have a liability. The right answer comes from looking at the company’s actual figures rather than assuming a result based on its size or accounting framework.

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 Chiswick

Preparing a Company Tax Return can quickly become complicated once you move beyond the headline figures — separating disallowable costs, checking capital allowances, agreeing the tax adjustments and making sure the CT600 ties back to the accounts all take time you would probably rather spend running the business. Micro Entity Accounts works with companies in Chiswick and the surrounding area to take that burden off your desk, supporting CT600 preparation, Corporation Tax computations, tax adjustment reviews and submission of the Company Tax Return to HMRC. Whether you are filing for the first time, catching up on an overdue return, or simply want a second pair of eyes on your Corporation Tax position, we can review your records and explain the next steps in plain English. Get in touch with our team to discuss your CT600 Tax Return Filing and find out how straightforward the process can be.

─── 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 your company's Corporation Tax position for an accounting period, including the figures used to arrive at taxable profit and the resulting Corporation Tax liability (or a nil position, where none is due). It is filed with HMRC rather than Companies House, and it sits alongside — but separately from — your company's other filing obligations.

Who needs to file a CT600?

Broadly speaking, a company that is within the scope of Corporation Tax and has been required by HMRC to deliver a Company Tax Return will need to file a CT600. Whether a return is required, and for which periods, depends on the company's own circumstances — for example, whether it has been trading, whether it is dormant for Corporation Tax purposes, and whether HMRC has issued a notice to file. If you are unsure about your position, it is worth checking before assuming you have nothing to do.

Is a CT600 different from statutory accounts?

Yes, and the distinction matters. Statutory accounts are prepared under an accounting framework and filed at Companies House as part of your company's public filing obligations. A CT600 is the Company Tax Return submitted to HMRC to report the Corporation Tax position. The accounts provide much of the underlying information, but the return is a separate document, filed with a different body, and prepared for a different purpose.

Is a CT600 the same as a Corporation Tax computation?

No. The Corporation Tax computation is the working that takes your accounting profit and adjusts it to arrive at taxable profit — for example, by adding back disallowable expenditure or applying capital allowances. The CT600 is the return that reports the outcome of that work to HMRC. In practice, the computation supports the figures entered on the return, so the two are prepared together even though they are not the same thing.

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

It may do, but not automatically in every case. Micro-entity status affects how statutory accounts can be prepared and filed at Companies House — it does not create a separate or simplified version of the CT600, and it does not by itself determine whether Corporation Tax is payable. Where a company has been required to deliver a Company Tax Return, the CT600 still needs to be prepared and filed with HMRC, and the company's accounting figures may still need tax adjustments along the way.

Is filing a CT600 the same as paying Corporation Tax?

No — filing and paying are separate obligations. Submitting the CT600 reports your company's position to HMRC, while any Corporation Tax due is paid separately, and the payment date can differ from the filing date. It is also entirely possible for a company to file a return and owe nothing, depending on its taxable position. Keeping both elements on the radar helps avoid avoidable admin later on.

What information is needed to prepare a CT600?

At a minimum, we would usually look for your accounting records and draft or final accounts for the period, details of income and expenditure, information on fixed asset purchases and disposals, any other income such as interest, and the figures and workings behind your tax adjustments. It also helps to know about anything unusual in the period, such as one-off costs or changes in how the business operates, so those items can be treated correctly rather than overlooked.

What happens if a company files its CT600 late?

HMRC does not treat a late Company Tax Return as a neutral event. Penalties and interest can apply for late filing and for late payment of Corporation Tax, and how much is charged generally depends on how late the return is and the company's circumstances. The practical answer is to file as soon as the figures are ready, and if you know a return is already overdue, to get support in bringing it up to date rather than letting the position drift further.