Find out how to send information to support your claim for R&D Corporation Tax relief and what you will need to provide.
When you must submit
From 1 August 2023 you must complete and submit an additional information form to HMRC to support all your claims for Research and Development (R&D) tax relief or expenditure credit.
You will need to send us an additional information form before you submit your company’s Corporation Tax Return. If you do not do this, we will write to you to confirm that we’ve removed your claim for R&D tax relief from your Company Tax Return.
You can submit the additional information form before 1 August 2023 if you want to give us more information.
Who can submit
You can complete the additional information form if you’re:
- a representative of the company
- an agent acting on behalf of the company
What information you will need
To complete the additional information form you will need the following details.
Company details
Your company’s:
- Unique Taxpayer Reference (UTR), this must match the one shown in your Company Tax Return
- employer PAYE reference number
- VAT registration number
- business type, for example your current SIC (Standard Industrial Classification) code
Contact details
The contact details of:
- the main senior internal R&D contact in the company who is responsible for the R&D claim, for example a company director
- any agent involved in the R&D claim
Accounting period start and end date
The accounting period start and end date for which you’re claiming the tax relief, this must match the one shown in your Company Tax Return.
Qualifying expenditure details
Include details of the qualifying expenditure.
If you meet the conditions, you can claim for either or both:
- tax relief as a small and medium-sized enterprise (SME)
- expenditure credit as a large company or SME
If you’re claiming for SME tax relief, you can claim for:
- cloud computing costs, including storage, for accounting periods beginning on or after 1 April 2023
- consumable items, for example materials or utilities
- data licence costs, for accounting periods beginning on or after 1 April 2023
- externally provided workers
- payments to participants of a clinical trial
- software
- staff
- subcontractor costs
If you’re claiming for expenditure credit, you may be able to claim for:
- cloud computing costs, including storage, for accounting periods beginning on or after 1 April 2023
- consumable items, for example materials or utilities
- contributions to independent R&D costs
- data licence costs, for accounting periods beginning on or after 1 April 2023
- externally provided workers
- payments to participants of a clinical trial
- software
- staff
- subcontractor costs
Qualifying indirect activities
Include the amount of qualifying expenditure for each project of qualifying indirect activities, that do not directly lead to resolving the uncertainty.
This may include:
- creating information services for R&D support such as preparing a report of R&D findings
- direct supporting activities such as maintenance, security, administration and clerical activities and finance and personnel activities, for the share that relates to R&D
- ancillary activities needed to begin R&D, for example taking on and paying staff, leasing laboratories and maintaining R&D equipment, including computers used for R&D purposes
- training required to directly support the R&D project
- research by students and researchers carried out at universities
- research including data collection to make new scientific or technological testing, surveys or sampling methods, where this research is not R&D in its own right
- feasibility studies to inform the strategic direction of a specific R&D activity
This cannot include any costs related to data licensing or cloud computing.
Project details
The number of all the projects that you’re claiming for in the accounting period and their details.
If you’re claiming:
- for 1 to 3 projects, you need to describe all the projects you’re claiming for that cover 100% of the qualifying expenditure
- for 4 to 10 projects, you need to describe those projects that account for at least 50% of the total expenditure, with a minimum of 3 projects described
- for 11 to 100 (or more) projects, you need to describe those projects that account for at least 50% of the total expenditure, with a minimum of 3 projects described — if the qualifying expenditure is split across multiple smaller projects, describe the 10 largest
If you’re a large business customer
For information on how HMRC deals with expenditure credit claims for large business customers, read CIRD85100 Large Business Practice Notes in the Corporate Intangibles Research and Development Manual.
If you have any questions relating to the additional information form, you can contact the large business directorate using the relevant contactus email address, copying in your Customer Compliance Manager (CCM).
In addition, you can send us further supporting details about your R&D projects in a separate R&D report, you can include for example:
- the claim methodology
- use of sampling
- details of the competent professionals
You can submit the separate R&D report either:
- by email, using one of the contactus email addresses — copying in your Customer Compliance Manager
- online, when you complete your Company Tax Return
Give a description for each of the projects
1. What is the main field of science or technology
Provide a brief description of the field of science or technology that the project relates to.
The following terminology will help you complete the description.
Science is the systematic study of the nature and behaviour of the physical and material universe. Work in the arts, humanities and social sciences, including economics, is not science for this purpose.
From 1 April 2023 mathematical advances in themselves are treated as science for these purposes, whether or not they are advances in representing the nature and behaviour of the physical and material universe.
Technology is the practical application of scientific principles or knowledge.
2. What was the baseline level of science or technology that the company planned to advance
Describe the level of knowledge or capability that existed at the time the project started and which the company intended to advance, for example if the intention was to:
- improve an existing material or device, what were its existing features and capabilities
- develop new knowledge in a particular area of science or technology, what was already known
3. What advance in that scientific or technological knowledge did the company aim to achieve
Provide a description of the advance using the baseline level of science or technology in the previous answer as a comparison.
The following information will help you complete the description.
An advance in knowledge or capability in science or technology may have physical consequences or may be an increase in overall knowledge, but in either case, a competent professional working in that field would recognise it as a significant improvement.
The improvements may include:
- creating a process, material, device, product or service that increases knowledge or capability
- improving an existing process, material, device, product or service, for example to save costs or reduce waste
- using science or technology to copy the effect of a current process, material, device, product or service in a new or improved way
4. The scientific or technological uncertainties that the company faced
You must include only scientific or technological uncertainties, for example, the company:
- does not know if it is possible to create or improve the product or process
- cannot readily deduce how to create or improve the product or process, for example you tried to build a medical diagnostic tool combining non-invasive testing technology, artificial intelligence (AI) and portability, but you’re not sure about the method to do this
Your description of the uncertainties should explain:
- what is stopping you from achieving the advance in scientific or technological knowledge (a problem is not an uncertainty if it can be resolved in a discussion with peers)
- why is it a technological or scientific uncertainty for the industry, not just your company
- if a competent professional working in the field would be uncertain as to how to achieve the advance, and explain why
5. How did your project seek to overcome these uncertainties
Provide more details about the direct R&D activities that try to resolve the scientific or technological uncertainties, as well as qualifying indirect activities.
Describe the information in sufficient detail to tell us:
- how the R&D project was not straightforward
- the methods planned or used to overcome the uncertainty
- if the uncertainties were resolved, if yes how, and if no why not
Qualifying indirect activities may include:
- creating or adapting software, materials or equipment needed to resolve the uncertainty
- planning activities such as a detailed plan of how you will carry out the project
- designing, testing and analysis to resolve the scientific or technological uncertainty
Include the qualifying expenditure for each project for indirect activities that do not directly lead to resolving the uncertainty, a list of what may be included can be found in the section qualifying indirect activities.
6. Which tax relief you’re claiming for and the amount
Tell us what you’re claiming for, for example R&D tax relief, expenditure credit, or both, and what amount of the qualifying expenditure applies to each specific project.
Submit your form
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You can submit the form if you’re:
- a representative of the company — you will need the Government Gateway user ID and password you used when you registered for Corporation Tax, if you do not have a user ID, you can create one the first time you sign in
- an agent — you will need the Government Gateway user ID and password you used when you registered for the agent services account, if you do not have a user ID, you can create one the first time you sign in
You will not be able to access the form once it’s been submitted, so save a copy before you do.
You will then get an email to confirm that we’ve received the form, this email will contain a reference number.
Keep a note of this reference number so that:
- you can discuss your additional information form with HMRC
- if we need to, we can check that you’ve submitted your additional information form
How to claim
If you decide to continue with your claim:
- check if you need to tell HMRC that you’re planning to claim Research and Development (R&D) tax relief for accounting periods beginning on or after 1 April 2023
- and you do need to submit a claim notification form, put an ‘X’ in box 656 of the Company Tax Return to tell us that you have submitted it
- put an ‘X’ in box 657 of the Company Tax Return to tell us that you’ve submitted the additional information form
- complete the computations for the relevant accounting period
- complete and send us the supplementary form CT600L if you’re claiming payable credit or expenditure credit
Read more information on how to complete the Company Tax Return.
