Capital Allowances | HMRC Guidance, Key Updates, and Practical Advice for Businesses
Capital allowances provide tax relief to businesses which invest in long term assets by allowing qualifying expenditure to be deducted from taxable profits, thereby reducing tax liability. Taking full and proper advantage of capital allowances requires experience and understanding of the prevailing and constantly shifting financial legislation.
Capital allowances can be a ‘red flag’ for HMRC. Navigating the intricate regulations of capital allowances is widely considered one of the most challenging areas of UK tax law. Whether due to technical error or deliberate non-compliance, misapplying these rules frequently triggers a HMRC tax investigation or enquiry.
We specialise in representing both individual and corporate clients across the full spectrum of tax disputes, from civil enquiries to complex criminal tax investigations.
John Veale of KANGS briefly outlines the nature of capital allowances available and indicates some of the updated guidance provided by HMRC.
Contents
Capital Allowances Explained
Understanding the complex regulations and the proper utilisation of capital allowances is notoriously difficult. In short, businesses are allowed to deduct some or all of an item’s value from their profits before paying tax.
Claiming capital allowances enables the cost of essential investment such as equipment, machinery and business vehicles (known as ‘plant and machinery allowances’) and other essential expenditure, to be spread over time or, in some cases, claimed in full in the year of purchase. The result is that cash may be reinvested in a business.
Given that the purpose of capital allowances is to stimulate investment in assets, in the hope that it will increase productivity, not all assets purchased for a business will qualify for relief. Leased assets, land and buildings (except specific fixtures) and purchases for non-business use, do not qualify as capital allowances.
HMRC Changes to Guidance
In 2024, the Chartered Institute of Taxation submitted a list of concerns to HMRC highlighting long-standing ambiguities in the operation of the tax allowances. In June 2025, responding to the Institute’s concerns, HMRC provided a comprehensive reply, agreeing with some areas of uncertainty but disagreeing with others.
Where specific clarifications could be made, particularly when simple adjustments would provide immediate benefit to users, HMRC has taken the appropriate remedial steps.
Capital Allowances Available
Plant and Machinery
The amount that can be claimed will vary depending on which of the following allowances is claimed:
- annual investment allowance where up to £1 million can be claimed on certain plant and machinery,
- 100% first-year allowances which allows for the full amount for certain plant and machinery to be claimed in the year of purchase,
- writing down allowances available if the plant and machinery does not qualify for the annual investment allowance or the maximum available for that relief has already been claimed,
- the super-deduction or 50% special rate first year allowance available on certain plant and machinery purchases,
- full expensing and 50% first year allowance on certain qualifying plant and machinery investments.
Other Capital Allowances
Provision is made for capital allowances to be claimed for a raft of other essential expenditure covering activities such as:
- the extraction of minerals,
- research and development,
- patent rights,
- structures and buildings,
- renovating unused business premises.
Updated Guidance Provided By HMRC
HMRC has updated guidance as follows:
- Outdated References to technologies, such as word processing, and case law, have been amended,
- Interaction between different allowances - new guidance has been issued,
- Software - there is amended guidance to improve links between different parts on the tax treatment of software and to clarify how second-hand asset exclusion rules apply,
- Long-Life Assets - the existing guidance on long-life asset rules have been updated and clarified,
- Real Estate Investment Trusts - the guidance claiming first-year allowances has been clarified,
- Furnished Holiday Lettings Repeal - guidance in respect of capital allowances has been provided,
- Fixtures - updates to the guidance distinguishing fixtures from chattels have been provided.
What Remains Under Review?
HMRC has stated:
"Some of the areas raised required more detailed consideration due to their complexity, and further areas where the guidance could be improved have been identified through the process of improving the guidance. In this regard, we are continuing to consider how guidance could be improved in respect of the following areas:"
The topics referred to are:
- Leasing
- Employees and Office Holders
- Meaning of Plant
- Contributions
- Various Discrete Issues.
Why is this important?
Accurate understanding of capital allowances, as with all other aspects of tax law, is essential for effective tax planning. Misinterpretation can lead to underclaimed relief or even compliance issues. The recent updates represent a proactive step by HMRC to address real-world uncertainty, particularly in niche or evolving areas such as software and second-hand assets.
HMRC continues to address the issue of capital allowances, but, as with many aspects of UK tax law, there are always variations and additions that require close monitoring.
How Can We Help?
HMRC will often undertake a compliance check or open a tax investigation. Should you be under scrutiny, we can represent your company in relation to any enquiry or tax investigation conducted by HMRC.
The team at KANGS offers many years’ experience handling HMRC disputes of every nature and would be delighted to hear from you.
Tel: 0333 370 4333
Email: info@kangssolicitors.co.uk
We provide initial no obligation discussion at our three offices in London, Birmingham, and Manchester. Alternatively, discussions can be held through video conferencing or telephone.
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