Corporation Tax Deadline Calculator



Corporation Tax FAQS

Some of the most commonly asked questions about Corporation Tax. Find your answers here or let contact us for more information.

What is an Accounting Period? Accounting periods are normally 12 months’ long, and they generally correspond with the financial year. An accounting period can be shorter than 12 months, but it cannot exceed 12 months. Your Corporation tax liability is determined by the amount in profits your company has over an accounting period.

When your corporation tax return due? This needs to reach HMRC to HMRC within 12 months after the end of each accounting period

What if you didn’t make a corporate profit? You still need to submit your accounts and tax return confirming this information within these deadlines.

What needs to be submitted? You need to prepare and submit Statutory Accounts and a Corporation Tax return (on form CT600) along with supporting calculations to show how the figures in your tax return were reached.

How to File a Corporation Tax Return?

A Corporation Tax return can be filed online via HMRC website on a form CT600. You need to be registered for Corporation Tax in order to be able to submit your Tax Return.

How to register for Corporation Tax?

When you register/form your company with Companies House, HMRC is automatically alerted of the formation of your company. They will send you a Welcome letter which will include what is known as a UTR number. This number is very important and you should keep it safely as it will be needed at every tax-related event in the future.

You need to register on HMRC website for Corporation Tax Online Services.

Get professional help with your Corporation Tax registration – included free in all our Fixed Fee Packages. View Packages

Corporation Tax Deadline Calculator

Try our corporation tax deadline calculator to calculate the dates your corporation tax return is due, the date your taxes need to be paid by and the date your annual accounts need to be submitted by.

Or get in touch with us on 02071128229 or and we can help you calculate your due dates.

Tax Reliefs on Charitable Donations for Companies

Not many Company owners are aware that as a Limited Company you may be eligible for Tax Reliefs on Charitable donations that you make. And that doesn’t mean just making monetary donations – there are tax reliefs available for your company on a variety of charitable actions from Equipment to Your Employees Time! 

Not only are you helping people, animals, the environment – whatever you choice of charity maybe – but you can reduce your tax bill too. 

How it Works 

In a nutshell, the amount you donate is deducted from your Company profit pre-tax, therefore reducing the amount of tax your company will pay. 


What Types of Charitable Company Donations qualify for Tax Relief

  1. Donations of Employee time

If you allow your employees to spend some of their usual paid working hours performing charitable acts – you can deduct any costs as normal business expenses.


Continue to pay the employee and run PAYE on the salary as usual. You can deduct the costs (including wages and business expenses) from your taxable profits as if they are working for you as normal.


2. Donations for Trading Stock

If your company donates trading stock to a Charity, you can deduct the full cost of the stock from your pre-tax profits. 


3. Donations of Equipment

If you donate company equipment to a Charity, full capital allowances can be claimed on the cost of the equipment you donate. 


4. Donating Money 

While donating money is potentially the most common way in which Company may choose to Donate to charity, it also has more rules you need to adhere to, to make a valid and acceptable Company Charitable Donation. 

The money you donate cannot be a loan or in other words, you should not be expecting any kind of repayment in either in money or in services or any other restrictive conditions. 

You also cannot make the donation from Dividends or Company Profits. 



Company Tax Reliefs on Charitable donations are claimed through the Annual Company Tax Return in 3 different ways, depending on the type of donation your company has made. 



As an Expense

If your charitable donation was 

  • ‘Your Employees Time’ or
  • ‘Sponsorship’

As a Relief on Pre-Tax Profit

If your charitable donation was a donation of 

  • Money or
  • Stock

As a 100% Capital Allowance

If your donation was Company Equipment  


 It’s worth noting that although it is not an all together complicated process to claim your tax relief, you need to record charity donations and payments correctly in order to successfully your obtain tax relief. For example, the type of payment or donation governs where and how you record the transaction in your accounts – which could become a bit complex depending on the type of donation you have made. 


Get in touch with our team of experienced accountants and we can help you ensure your Tax Return is completed correctly to show that your Charitable Donations are eligible for Tax Reliefs. 


In2Accounting 02081128229

R&D Tax Credits for Small Businesses

Research and Development Tax Credits (R&D Tax Credits) 

Although the R&D Tax Credits Scheme has been in place since 2000 many businesses are not aware that they are eligible for these tax credits. Currently, £2 billion in tax credits are being claimed every year.

R&D tax credits are a key part of the government’s strategy to support innovation in the UK.

The R&D Tax Credits incentive scheme is essentially designed to encourage innovation and increase business spending on R&D activities for companies operating in the United Kingdom. It’s one of the government’s most rewarding incentives for encouraging investment in research and development and allows up to 33.35% of a company’s R&D spend to be recovered as a cash repayment..

So one might wonder, what is the catch? 


Well, there are restrictions which apply to what can be considered ‘Eligible R&D Expenditure’
Firstly, your business needs to be spending a minimum of £20000 on R&D.
Secondly, your business needs to be actively trading and a going concern.
Lastly, your business should not have paid for the R&D expenses using any other government funding.

What are costs can you claim on?

  • Expenditure on staff including salaries, employer’s NIC and pension contributions.
  • Expenditure on subcontractors and freelancers.
  • Expenditure on materials and consumables including heat, light and power that are used up or transformed by the R&D process.
  • Expenditure on some types of software.


How Much R&D Tax Relief are you eligible for?
This depends on whether your business is in loss or profit.

If your business in profit, you are eligible for 26%
If your business is in loss, you are eligible for the higher tax credits rate of 33.35%


What is the claims process like?
HMRC processes R&D tax credits. The processing time is only 4 to 6 weeks. The claim can be made via your Company Tax Return (CT600). It is advisable to include an R&D Tax Credits Claim Report to justify the expenses that you are claiming. In either case, you may be contacted by an HMRC agent to verify information in your report or be asked to submit further evidence to support your claims. In some cases, an HMRC agent may need to visit your site to perform further verification checks related to your claim.


How can In2Accounting Help ? 

We can assist you with the analysis of your expenditure and calculation of your potential R&D tax credits. We can also submit your Tax Return and R&D Claim. While it is not required, but highly recommended for a successful claim – we will also write your R&D Claim Report detailing your expenditures and their attributes which make them eligible for tax credits.

For a quick, efficient and afforable service get in touch with In2Accounting Team on 02071128229 or email us on


Learn more about R&D Tax Credits on HMRC Website.

Accounting Periods for Companies

What is an Accounting Period?

An accounting period is a period of time ending on your company’s financial year. It is usually around 12 months. It is an important date  for every Limited Company, because it decides your deadlines relating to corporation tax and annual accounts.

The tricky part about the Accounting Period, is that Companies House and HMRC have different requirements for your Accounting Period.


The Significance of an Accounting Period

The accounting period your company choose has an impact on your deadlines and the manner in which you which prepare your returns to both Companies House and HMRC.

It affects: 

  • The deadline for your Annual Accounts to be submitted to Companies House
  • The deadline for your Corporation Tax Payment to reach HMRC
  • The deadline for your Corporation Tax Return to reach HMRC

So it is an important date and one which requires  planning and consideration when you form a company, or if you decide to change your Company Accounting Period.


Your First Accounting Period

When you first incorporate your company, Companies House and HMRC will automatically issue you with your Accounting Year End (Also known as your Accounting Reference Date).

It will span a period between the date you incorporated your company and your Accounting Reference Date. It is likely to be more than 12 months due to the manner in which Companies House automatically generates your Accounting Reference Date.


Accounting Period for Companies House

  • It can be more than 12 months
  • It can be less than 12 months
  • The end of your accounting period is known as your Accounting Reference Date/Year End/Financial Year End
  • Your Company Accounts will be prepared based on all financial information within this period.

For example, if your accounting period is from the 1 January 2014 to 31 January 2015(13 months), all the transactions you entered into during these  dates would be summarised to create your annual accounts. The Annual Accounts include your Profit and Loss statement, Balance Sheet, Statement of Capital and Notes to the accounts.


Accounting Period for HMRC 

  • It can be less than 12 months
  • It CANNOT be more than 12 months
  • It is determined by your Accounting Year End date

The end of your accounting period or your accounting year end will determine when your Corporation Tax Return and Corporation Tax Payment is Due to be submitted to HMRC.


The Tricky Bit

If you prepared your Annual Accounts for a period greater than 12 months (ie in the example above it is 13 months) You need to submit 2 separate Corporation Returns, following the example above: 

  • The first Tax Return covering 12 months (1 Jan 2014 to 31 Dec 2014)
  • The second Tax Return covering 1 month (1 Jan 2015 to 31 Jan 2015)

If your Accounting Period is actually less than or equal to 12 months, you will have only 1 corporation tax return as normal.

Registering for Corporation Tax

Registering for Corporation Tax is a simple online procedure, but it is vital that it is performed in time and with accurate information. All our Limited Company Packages include registering for Corporation Tax on your behalf as your tax agent with HMRC.


When to register?

You need to register your company within 3 months of starting your business. Starting your business means buying, selling, employing staff, advertising your products/services or renting for business purposes etc


Information you will need to complete a corporation tax registration

  • UTR number (unique tax reference number)
  • the date you started to do business (this will be the start date of your company’s first accounting period)
  • your company name
  • company registration number
  • your business trading address (ie where you work from)
  • your business activity
  • your accounting reference date (the date you make your accounts up to)
  • the name and home address of the company directors


UTR Number

Your UTR number will automatically be sent to, usually within 2 weeks of forming your limited company. HMRC is automatically informed of your companies registration and will send your UTR number by post to your registered company office address.

Accounting Period

Your accounting period is a time period that you choose to run your accounts to and is usually 12 months or a year (it cannot be more than 12 months for Corporation Tax purposes – so if your Accounts did span a period over 12 months, you may need to submit 2 tax returns, with the second tax return covering the period in excess of 12 months)

Director Responsibilities

Duties of a UK Limited Company Director

The overriding requirement of a director is to act in the best interest of the company as opposed to the interests of third parties or even shareholders. The Companies Act 2006 sets out a statement of a director’s duties, here are the key points:

  • Duty to act within their powers
  • Duty to promote the success of the company
  • Duty to exercise independent judgement
  • Duty to exercise reasonable care, skill and diligence
  • Duty to avoid conflicts of interest
  • Duty not to accept benefits from third parties
  • Duty to declare interest in a proposed transaction or arrangement


Other Director Duties

You must comply with employment law in dealings with employees.

Avoid unfair dismissals, discrimination or any other inappropriate work practices, such as unequal pay.

Act quickly to ensure the company complies with any new employment laws.

You must take reasonable care to ensure the health and safety of your employees.

You must undertake a risk assessment.

If you have five or more employees, you must record this in writing and have a written health and safety policy.

Pay the correct amounts of tax, VAT and National Insurance on time.

Consider data protection policies for the company

Not provide misleading information

Ensuring that the statutory returns are filed with the Registrar of Companies on time

Sign a declaration acknowledging responsibilities relating to accounting records and the accounts in general

Ensure that the company’s business stationery, website, order forms and emails carry its name, registered number, country of registration and registered address


Director Consequences for Misconduct or Breech of Duties

Directors could be held personally liable for losses in certain circumstances such as:

  • wrongful or fraudulent trading (ie. allow the business to carry on and incur debts when you know there is no reasonable prospect of repaying them)
  • acts beyond your powers or undertaken with insufficient skill and care
  • in breach of their duties or responsibilities stated above

So despite being the director of a Limited Liability Company Company, if you are not fully aware of and do not adhere to, the expectations placed upon you, you may find yourself personally liable for Company debts.

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