─── Specialist Micro-Entity Accountants In The UK

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

If your company needs to report its Corporation Tax position to HMRC, CT600 Tax Return Filing is the process that gets it done. Our service for Portland companies covers the preparation of your CT600 — the Company Tax Return itself — along with the Corporation Tax computation that supports the figures you report, including any tax adjustments needed to move from accounting profit to taxable profit. It is important to understand that the CT600 is a separate filing from the statutory accounts you submit to Companies House, even though both draw on the same underlying records. We help you keep those obligations distinct and properly handled, so your figures are accurate, your disclosures are complete, and the return can be submitted to HMRC with confidence. Whether you are filing for the first time, catching up on an overdue period, or simply want the administration taken off your desk, professional support gives you clarity on what is required and when, without the guesswork.

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. Best accountants we've ever had. Umer is ace, and makes everything easy and transparent.
  
 
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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.

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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 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 in Portland?

There is no separate official “micro-entity CT600” form. The CT600 is simply the name of the Company Tax Return that HMRC requires from companies that need to report their Corporation Tax position, and that includes companies that happen to meet the size criteria for a micro-entity. Being small does not automatically remove Corporation Tax obligations: whether a micro-entity company must submit a CT600 to HMRC, and whether any Corporation Tax is actually payable, depends on the company’s own circumstances and taxable position. It is also worth separating two things that are often confused. The statutory accounts a micro-entity prepares — for example under FRS 105 — and files with Companies House are not the same document as the CT600, and choosing a particular accounting framework does not by itself determine the company’s Corporation Tax liability. The accounts provide the starting point, and the figures they contain may then need tax adjustments: disallowable expenses added back, capital allowances or other reliefs considered, and items treated differently for tax than they are in the accounts. The result is taxable profit, which can differ from the accounting profit shown in the accounts. Filing the CT600 and paying any Corporation Tax due are also separate obligations — a return can be filed showing a nil or reduced liability, and a liability can arise even when the return is submitted on time.

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.

Take the Stress Out of CT600 Tax Return Filing in Portland

Preparing a Company Tax Return is rarely as simple as copying numbers across from your accounts. Working out taxable profit, reviewing which costs are allowable, and making sure the figures in the CT600 match the underlying records all take time — and that is before you think about HMRC’s filing requirements. Micro Entity Accounts can help Portland companies with CT600 preparation, the Corporation Tax computation, a review of the tax adjustments behind your taxable profit, and submission of the return to HMRC. We keep the process organised and clearly explained, so you know what has been filed and why the figures look as they do. Get in touch to talk through your company’s position and arrange your CT600 Tax Return Filing.

─── 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 and who needs to file one?

A CT600 is the form HMRC uses for a Company Tax Return. It reports a company's income, expenses and Corporation Tax position for an accounting period, and it is normally submitted alongside a Corporation Tax computation and, where relevant, a copy of the statutory accounts. Whether your company needs to file one depends on its circumstances — for example whether it is within the charge to Corporation Tax, whether it is active, and whether HMRC has issued a notice to deliver a return. If you are unsure whether a return is due, it is worth checking your position rather than assuming the answer either way.

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

Yes — they are two separate filings with two different purposes and two different recipients. Statutory accounts are prepared under an accounting framework and filed with Companies House as part of the public record. A CT600 is the Company Tax Return submitted to HMRC to report the Corporation Tax position. The two often share the same underlying bookkeeping, but the CT600 is not a substitute for statutory accounts, and filing your accounts does not mean you have filed your Company Tax Return.

Is a CT600 different from a Corporation Tax computation?

They go together, but they are not the same thing. The Corporation Tax computation is the working that starts from your accounting profit and applies the necessary tax adjustments — such as adding back disallowable items or claiming available reliefs — to arrive at taxable profit and the resulting Corporation Tax figure. The CT600 is the return that reports those results to HMRC in the required format. A well-prepared computation makes the CT600 far easier to complete and easier to explain if HMRC ever asks questions.

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

Possibly — it depends on the company's circumstances rather than its size label alone. Meeting the micro-entity criteria affects the accounting framework and the level of disclosure in your accounts; it does not exempt a company from Corporation Tax or from a return that HMRC has requested. Some companies file a return showing no liability, while others calculate and pay Corporation Tax. If your company is dormant, or you believe no return is required, that should be confirmed rather than assumed, because the obligations are set by your company's own position.

What information is needed to prepare a CT600?

In practice, we need your accounting records for the period — the profit and loss account, balance sheet and supporting detail — together with information on capital expenditure, any loans or director transactions, and details of income already taxed elsewhere. Prior-year returns and computations are also useful, because they show brought-forward losses, reliefs or adjustments that may carry forward. Once we have the full picture, we can identify the tax adjustments needed and build the figures that will go into the return.

How is taxable profit worked out from accounting profit?

Taxable profit is not simply the profit shown in your accounts. The computation starts with accounting profit and then adjusts it: expenses that are not allowable for tax are added back, income that is treated differently for tax is separated out, and reliefs such as capital allowances may be deducted. The end result is the taxable profit on which Corporation Tax is calculated, and it can be higher or lower than the accounting profit. Because the adjustments depend on the individual transactions and the company's circumstances, the computation is usually the part of Corporation Tax filing that benefits most from professional attention.

Is filing a CT600 the same as paying Corporation Tax?

No — filing and payment are separate obligations with separate timetables. Submitting a CT600 tells HMRC what the company's taxable profit and Corporation Tax liability are; paying Corporation Tax is a separate step that must be handled in its own right. A company can file a return showing no liability, and a company can owe Corporation Tax even where the return has been submitted correctly and on time. It is worth keeping both dates in view so that neither is overlooked.

What happens if a company files its CT600 late?

Late filing can lead to penalties and, where tax is paid late, interest charges, with the amount depending on how late the return is and on the company's own circumstances. HMRC's guidance sets out the framework, and it is worth reviewing it or asking us if you are concerned about a specific period. If a return has been missed, the practical priority is usually to get the position back on track — preparing the outstanding computation and return accurately so the records are complete and any further exposure is limited.