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TAXguide 02/23: Associated companies
The reintroduction of two rates of corporation tax from 1 April 2023 means that the associated company rules now apply. This TAXguide provides a high-level guide to the associated company rules.
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Research and Development tax relief changes
This webinar will provide a practical overview of the changes to Research and Development tax relief regime in the UK, and what that might mean for you or your clients.
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What is happening in the world of R&D relief?
On 23rd March 2023, we invited author, tax advice specialist and ICAEW member David O’Keeffe to take us through an exploration of the current developments in R&D relief following the recent budget announcement. Check out the webinar and a summary of key information shared during the live broadcast.
Features and articles
HMRC asks companies and agents to check tax returns
- Article
- 03 Dec 2025
Letters are being sent where HMRC believes that the corporation tax liability declared by the company in its most recent company tax return is much lower than expected compared to similar companies.
Budget: Key changes impacting business taxation
- Article
- 26 Nov 2025
ICAEW’s Tax Faculty provides a summary of some of the changes affecting businesses announced at the Budget, including capital allowances and business rates as well as adjustments to penalty rates for late corporation tax filings and increasing the limits for venture capital reliefs.
Exclusive
The complicated world of loans to participators
- Article
- 20 Nov 2025
Stephen Relf explains the lessons to be learnt from recent decisions of the First-tier Tribunal, including where a loan to participator is transferred intra-group, a debt is left uncollected post liquidation and cash takings go missing.
New process for indirect exports from 15 December 2025
- Article
- 14 Nov 2025
From next month, businesses may need to change how they move goods through indirect exports from Northern Ireland. Guidance shared by HMRC explains why this is the case and sets out the options for traders.
Check claims for foreign tax credit relief, says HMRC
- Article
- 14 Nov 2025
HMRC is asking wealthy taxpayers to ensure they meet the criteria for foreign tax credit relief (FTCR), and to consider the terms of the relevant double tax agreement (DTA), before making a claim in their self assessment (SA) tax return for 2024/25.
HMRC contacts agents about directors’ loan accounts
- Article
- 10 Nov 2025
Agents are being asked to check if their clients’ company tax returns are correct where relief from tax has been claimed in the expectation that a loan made to a participator will be repaid.
UK continues to disappoint in tax competitiveness study
- Article
- 24 Oct 2025
The UK has ranked 32nd overall, and 37th on property taxes, out of the 38 OECD-member countries in the 2025 International Tax Competitiveness Index (ITCI).
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Fixtures: the importance of working together
- Article
- 30 Sep 2025
Bryan Crawford explains why cooperation and planning are fundamental when dealing with fixture sales if both the buyer and the seller are to secure the desired tax result.
Practical guidance
ICAEW's Tax Faculty provides practical support on technical areas of tax.
TAXguide 02/2024: Taxation of cryptoassets for businesses
- Technical release
- 28 Feb 2024
TAXguide covering the UK taxation of cryptocurrency held by businesses including corporation tax, stamp taxes, employment income and VAT.
Exclusive
TAXguide 06/23: A basic guide to pillar two
- Technical release
- 04 Sep 2023
Pillar two is part of a package of initiatives agreed at OECD level by territories worldwide to tackle the challenges of taxing multinational enterprises (MNEs) cross-border. In the UK, it will be known as the multinational top-up tax and domestic top-up tax that will apply for accounting periods beginning on or after 31 December 2023.
Exclusive
TAXguide 03/23: R&D tax relief for accounting periods spanning 1 April 2023
- Technical release
- 09 May 2023
The rates of research and development (R&D) tax relief have changed for expenditure incurred on or after 1 April 2023. In addition, the change in corporation tax rates from the same date means that the results for periods spanning 1 April 2023 must be time apportioned. This TAXguide uses examples to demonstrate the interaction of these changes.
Exclusive
TAXguide 02/23: Associated companies
- Technical release
- 05 May 2023
The reintroduction of two rates of corporation tax from 1 April 2023 means that the associated company rules now apply. This TAXguide provides a high-level guide to the associated company rules.
Exclusive
TAXguide 09/21: Brexit – The corporate tax implications
- Technical release
- 15 Apr 2021
This TAXguide analyses the corporate tax impact of Brexit on the typical cycle of outbound and inbound business operations within the UK and the EU as from 1 January 2021. It analyses them from the viewpoint of both the UK and the member states of the EU.
Research & Development tax relief
Corporation tax — Autumn update
- Webinar
- 23 Oct 2025
This webinar covers changes in corporation tax (including research and development tax relief) in the 12-18 months before the date of the session. The practical impact of these changes is explained, and the relevance of these changes to a typical SME is highlighted.
Exclusive
Notification to HMRC of an R&D claim
- Helpsheets and support
- 03 Oct 2025
FAQ clarifying the rules around notifying HMRC of the intention to submit a Research and Development claim, which allows for pre-claim risk assessments and cutting down on abuse of the system.
New HMRC tool for R&D tax relief claims
- Article
- 02 Oct 2025
ICAEW’s Tax Faculty explores recent developments regarding research and development (R&D) tax relief, including the publication of a new online tool by HMRC and the latest statistics on claims for relief.
First corporate criminal offence prosecution
- Article
- 02 Sep 2025
Media reports suggest that an accountancy firm has been charged with failure to prevent the facilitation of UK tax evasion in connection with an alleged research and development (R&D) tax credit repayment fraud.
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The fog clears over R&D tax relief
- Article
- 03 Jul 2025
Issues over subsidised expenditure and subcontracting have made it difficult for companies to see clearly when it comes to research and development (R&D) tax relief, says Randeep Dhaliwal, who welcomes revised guidance from HMRC.
Don’t overlook R&D claim notification forms
- Article
- 30 May 2025
ICAEW explains the circumstances in which a company may need to submit a research and development (R&D) relief claim notification form and sets out the steps to take where a company has been affected by an error in HMRC’s guidance.
ICAEW comments on new R&D tax relief clearance processes
- Article
- 30 May 2025
The proposed clearance regimes for research and development (R&D) tax relief set out in HMRC’s consultation need to provide material benefits to claimants, says ICAEW.
Corporation tax — Spring update
- Webinar
- 20 May 2025
This webinar explores recent corporation tax changes and their practical impact (particularly for SMEs), with a focus on R&D tax relief developments.
Webinars and recordings
Corporation tax — Autumn update
- Webinar
- 23 Oct 2025
This webinar covers changes in corporation tax (including research and development tax relief) in the 12-18 months before the date of the session. The practical impact of these changes is explained, and the relevance of these changes to a typical SME is highlighted.
Corporation tax — Spring update
- Webinar
- 20 May 2025
This webinar explores recent corporation tax changes and their practical impact (particularly for SMEs), with a focus on R&D tax relief developments.
Associated companies: a family affair
- Podcast
- 29 Apr 2024
What is an associated company and how can this affect business taxation? This episode of The Tax Track looks at how to spot an associated company and apply the rules, particularly in relation to corporation tax.
Exclusive
Research and Development tax relief changes
- Webinar
- 20 Apr 2023
This webinar will provide a practical overview of the changes to Research and Development tax relief regime in the UK, and what that might mean for you or your clients.
Bloomsbury Accounting and Tax Service
Eligible firms have free access to Bloomsbury Professional's comprehensive online library, comprising around 80 titles from some of the country's leading tax and accounting subject matter experts. Find out who is eligible and how you can access the Accounting and Tax Service.
Exclusive
Bloomsbury Professional Tax Guide
- eBook
- 2025
- Graeme Connell, et al.
- Bloomsbury Professional Tax Guide
Comprehensive practical guide on the full range of UK taxes, containing worked examples throughout. This latest edition is up-to-date with Finance Act 2025, recent changes to HMRC guidance and relevant case decisions.
Exclusive
Bloomsbury's tax rates and tables 2025/26: Finance Act Edition
- eBook
- 2025
- Lucy Webb
Tax rates and tables updated to reflect measures passed in Finance Act 2025.
Exclusive
Bodies granted exemption from corporation tax on trading income
- eBook chapter
- 2025
- Satwaki Chanda, Jacquelyn Kimber, Andrew Parkes
- Corporation Tax
A section outlining the exemptions from corporation tax which are granted to charities, where certain conditions are met.
Exclusive
Capital allowances (plant and machinery)
- eBook chapter
- 2025
- Satwaki Chanda, Jacquelyn Kimber, Andrew Parkes
- Corporation Tax
Expert commentary on the current UK corporation tax legislation on capital allowances for plant and machinery.
Exclusive
Corporate tax reliefs for intellectual property
- eBook chapter
- 2025
- Anne Fairpo, Mark McLaughlin, Maria Kitt
- Tax Planning
A chapter on corporate tax reliefs for intellectual property, highlighting tax planning opportunities and potential pitfalls.
Exclusive
Corporation tax 2025/26
- eBook
- 2025
- Satwaki Chanda, Jacquelyn Kimber, Andrew Parkes
Annual guide examining the rules, regulations and tax issues affecting companies in the UK. The 2025/26 edition examines current legislation, changes to HMRC guidance and key developments. It is up-to-date with Finance Act 2025 and also reflects a number of recent case decisions.
Exclusive
Creative sector tax reliefs
- eBook chapter
- 2025
- Satwaki Chanda, Jacquelyn Kimber, Andrew Parkes
- Corporation Tax
Practical guidance on creative sector tax reliefs for film, TV, video games, theatre, orchestra, museums and galleries.
Exclusive
Expanding the company's activities and structuring business acquisitions
- eBook chapter
- 2025
- Peter Rayney
- Tax Planning for Family and Owner-managed Companies
Advice on making a business acquisition, written for anyone who advises or runs a family or owner-managed company.
Terms of use
You are permitted to access, download, copy, or print out content from eBooks for your own research or study only, subject to the Acceptable usage terms.
eBooks
The Library & Information Service provides a collection of eBooks as a benefit of membership. Please log in to access these titles. If you are unable to access an eBook, please see our Help and support or contact library@icaew.com.
Exclusive
Dividends received
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
Outlines the provisions which exempt UK dividends from taxation under the Corporation Tax Act 2009.
Exclusive
Chargeable gains
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
Covers chargeable gains for corporation tax purposes, with additional sections on dividends received, payments to charities, distributions, computation of tax liability, losses, groups, and the way corporation tax relates to income tax.
Exclusive
Loan relationships
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
An overview of loan relationships and corporation tax, with sections on the definition of these relationships, the scope of the rules, accounting for loan relationships and the basis of taxation.
Exclusive
Trading income
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
Explains how corporation tax applies to trading income and the ways in which it differs from income taxation. Covers the annual investment allowance and capital allowances for plant and machinery.
Exclusive
Computation of tax liability
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
Summarises how corporation tax should be calculated in a given tax year, with notes on the current rates and a simple example.
Exclusive
Chargeable accounting periods
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
The chargeable accounting period (CAP) for corporation tax usually coincides with a company's accounting period. This section outlines the alternatives available and how income is allocated within periods for tax purposes.
Exclusive
Scope of corporation tax
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
Lists the kinds of companies and organisations subject to corporation tax and where they must be resident for UK tax law to apply. This section briefly summarises the arguments and precedents concerning residence for tax purposes.
Exclusive
Corporation tax
- eBook chapter
- 2024
- Malcolm James
- Spiramus
- Taxation of Small Businesses
A full chapter on corporation tax in the UK, intended for advisors to small businesses. Includes sections on the scope of corporation tax, trading income, loan relationships, intangibles, derivative contracts, chargeable gains, distributions, losses, demergers, and more.
Terms of use
You are permitted to access, download, copy, or print out content from eBooks for your own research or study only, subject to the terms of use set by our suppliers and any restrictions imposed by individual publishers. Please see individual supplier pages for full terms of use.
Articles and books in the ICAEW Library collection
The collection of the ICAEW Library & Information Service includes a range of articles, books and reports on corporation tax. A selection of books on this topic is set out below.
Tolley's taxwise, 2025-26
- Library book
- 2025
- T. Agnew, et al.
- LexisNexis
An annual two-volume set offering practical expert guidance on how to approach real-world tax computations. Brings together relevant points from current legislation, case law and other official material. Worked examples and detailed explanatory notes are included to illustrate complex points.
Tolley's tax planning for owner-managed businesses, 2025-26
- Library book
- 2025
- J. Houghton
- LexisNexis
A practical title written specifically for the tax practitioner, offering real-life solutions to everyday business problems. Covers issues relevant to owner-managed and family businesses.
Tolley's tax computations, 2025-26
- Library book
- 2025
- Tolley's Editorial Team
- LexisNexis
An annual volume presenting over 500 up-to-date examples illustrating the practical operation of the main UK taxes, as well as national insurance contributions. Includes detailed explanatory notes with full references to relevant statutes and HMRC material.
Using a property company to save tax, 2025/26
- Library book
- 2025
- C. Bayley
- Taxcafe UK
This book covers all the expenses property companies can claim, how to save tax when you extract money from your company, and all the tax reliefs that can be claimed when properties are sold. For those thinking about setting up a property company, the guide looks at all the tax benefits, pitfalls, and practical issues, including how to get existing properties into a company.
Tolley's yellow tax handbook, 2025-26
- Library book
- 2025
- A. Redston (ed.)
- LexisNexis
Annual multi-volume work bringing together the fully amended and annotated text of all legislation and official material relating to income tax, capital gains tax, corporation tax, national insurance contributions, tax credits, petroleum revenue tax and inheritance tax. Includes footnotes indicating amendments to legislation, and cross-references to the HMRC Manuals.
Tolley's corporation tax, 2025-26
- Library book
- 2025
- K. Walton
- Tolley
An annual book on corporation tax law and practice, bringing together the latest legislation, case law and ancillary material. It is arranged by subject, with various aspects of corporation tax compliance and planning being covered in turn. Worked examples are included to clarify complex points.
Putting it through the company: tax planning for companies and their owners, 2025/26
- Library book
- 2025
- C. Bayley, N. Braun
- Taxcafe UK
A tax planning guide for company owners, setting out the tax savings that may arise from using a company. It explains, in plain English, the tax rules for dozens of different business expenses, including certain less obvious tax deductions.
The UK tax system: an introduction, 5th ed.
- Library book
- 2025
- M. James
- Spiramus
A guide to the UK tax system for tax practitioners and students. This fifth edition has been revised to reflect the law as of January 2025.
- View a list of all books in our collection on corporation tax
- View a list of articles in our collection on corporation tax
To find out how you can borrow books from the Library please see our guide to borrowing books.
You can obtain copies of articles or extracts of books and reports through our document supply service.
Representations
ICAEW REP 067/25 Reforming inheritance tax - unused pension funds and death benefits
- Representation
- 15 Sep 2025
- PDF (266kb)
A representation dated 15 September 2025 to a consultation published by HMRC on 21 July 2025.
ICAEW REP 066/25 Land remediation relief consultation
- Representation
- 15 Sep 2025
- PDF (230kb)
A representation dated 15 September 2025 to a consultation published by HM Treasury on 21 July 2025.
ICAEW REP 052/25 Reform of UK law regarding transfer pricing, permanent establishment and diverted profits tax
- Representation
- 08 Jul 2025
- PDF (146kb)
A representation dated 4 July 2025 to a consultation published by the government on 28 April 2025.
ICAEW REP 081/24 Industrial Strategy consultation response
- Representation
- 27 Nov 2024
- PDF (446kb)
A representation dated 24 November 2024 to a consultation published by the Department for Business and Trade on 14 October 2024.
ICAEW REP 070/24 Business Tax Roadmap
- Representation
- 30 Sep 2024
- PDF (162kb)
A letter sent from Frank Haskew, Head of Tax, ICAEW, to James Murray MP, Exchequer Secretary to the Treasury.
ICAEW REP 065/24 ICAEW Autumn Budget submission 2024
- Representation
- 18 Sep 2024
- PDF (313kb)
Ahead of the Budget on 30 October, ICAEW has published its submission to the Chancellor. ICAEW urges the government to put incentivising growth at the heart of the Budget, with recommendations including: long-term fiscal planning, a fundamental review of the tax system and investment in skills and green technologies.
ICAEW REP 041/24 TAFR enquiry and assessment powers penalties and safeguards
- Representation
- 02 May 2024
- PDF (273kb)
A representation dated 2 May 2024 to a consultation published by HMRC on 15 February 2024.
ICAEW REP 023/24 R&D tax reliefs guidance on contracting out and overseas restrictions
- Representation
- 04 Mar 2024
- PDF (456kb)
A representation dated 29 February 2024 to a consultation published by HMRC on 9 February 2024.
Useful links
Some resources that we link to may pre-date the latest amendments to the relevant tax regulations. While these links contain useful information, please treat them with appropriate caution.
Corporation Tax: detailed information on GOV.UK
- Website
- 13 Mar 2018
Official guidance on corporation tax for limited companies, including preparing accounts, working out corporation tax, reliefs available, filing returns, payments and refunds.
Corporation Tax: HMRC manuals
- Website
- 13 Mar 2018
HMRC internal manuals providing guidance on corporation tax relating to a wide range of business sectors and reliefs.
Corporation Tax topic on GOV.UK
- Website
- 19 Jun 2023
A hub page providing links to various materials and facilities relating to corporation tax, including services, guidance and regulations, news and communications, research and statistics, policy papers, and consultations.
ICAEW accepts no responsibility for the content on any site to which a hypertext link from this site exists. The links are provided ‘as is’ with no warranty, express or implied, for the information provided within them. Please see the full copyright and disclaimer notice.
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