Growing a business requires more than just hard work, careful planning and a sprinkling of luck; investment in the plant and machinery required to expand your operations is also a key factor. A few years ago, businesses could use a tax scheme called ‘enhanced capital allowances’ (ECAs) to reduce the impact these investments had on their profits, though this scheme is no longer readily available.
Originally introduced to encourage businesses to grow in an eco-friendly manner—by providing 100% tax relief on eco-friendly plant and machinery purchases—enhanced capital allowances were withdrawn by the government in 2020. Today, businesses can use other capital allowance schemes to help offset the costs of new and green plant and machinery purchases.
In this guide for local Yorkshire businesses and brands across the UK, I’ll explain what ECAs were, how they differed from normal capital allowances, and what alternate financial incentives businesses can benefit from in their stead. By the end, you should have a clearer idea of what tax allowances are available to help you lower your tax bill.
Contents
- What was the enhanced capital allowance (ECA)?
- Why ECAs were withdrawn
- Allowances which have replaced enhanced capital allowances UK
- How capital allowances benefit business
- The future of capital allowances and business rates
- Conclusion: Making the most of enhanced capital allowance alternatives
What was the enhanced capital allowance (ECA)?
Enhanced capital allowances (ECAs) were a unique type of deductible business expense, effectively withdrawn by the government in 2020. Prior to withdrawal, businesses in the UK could use their annual enhanced capital allowance to offset 100% of the costs of green plant and machinery in the first year of purchase. Let’s break down what this meant.
A deductible business expense is a cost that HMRC allows businesses to deduct from their annual profits before paying tax. Being able to deduct certain expenses from the year’s profits can help you reduce your overall corporation tax bill.
Green plant and machinery costs are those incurred when purchasing (not leasing) plant and machinery which: either produces zero carbon emissions, or is deemed energy efficient, thus helping to push the UK toward its carbon-reduction goals.
First year of purchase means that 100% tax-free enhanced capital allowances could only be applied to eligible plant and machinery in the same year that it was purchased. ECAs could not be claimed in one year for machinery bought in another, nor could they be claimed for plant and machinery already covered by other capital allowances.
The ECA scheme was amended in the 2018 Budget, and in 2020 was effectively withdrawn when the government removed most qualifying plant and machinery from the list of purchases covered.
Explaining the difference between capital allowances and enhanced capital allowances
Most business owners in the UK will already be well aware of capital allowances and how they can be used to reduce tax bills, but are perhaps less au fait with how these compared to enhanced capital allowances.
In essence, ECAs were designed to exclusively cover 100% of the costs of investing in green and carbon-neutral plant and machinery, whilst other capital allowances are geared more generally: to offer smaller tax reliefs on plant and machinery across the board.
Why ECAs were withdrawn
Prior to the Autumn 2018 Budget, which introduced changes to ECAs, most of the plant and machinery eligible for tax relief came from one of two government-approved lists: the Energy Technology List (ETL) and Water Technology List (WTL).
These lists were created to establish an official record of energy-efficient water and energy products. Businesses that choose to invest in one or more of these officially recognised products could then use the enhanced capital allowances scheme to write off 100% of the procurement costs as tax relief against their profits that year.
However, in 2018, the UK government decided that the ECA scheme had run its course, and that there were other, better ways to fund the UK’s transition to a greener economy. A fact reinforced by PWC’s findings from working with clients: they saw that many firms considered the scheme difficult to navigate, which ultimately led to a relatively low uptake and its subsequent repeal.
According to the government’s own website, “The revenue saved by [removing the ETL and WTL from ECA scheme eligibility] will be used to fund the Industrial Energy Transformation Fund.”
Allowances which have replaced enhanced capital allowances UK
It’s not entirely accurate to say that the enhanced capital allowance scheme no longer exists (in fact, it is still listed as an available tax relief scheme for businesses on the gov.uk website).
However, with the vast majority of previously-eligible products removed from the scheme, it is no longer nearly as useful as it once was. The closest scheme to ECA now is called ‘full-expensing.’
Personally, I’d recommend business owners familiarise themselves with the four key alternatives to the ECA below.
4 enhanced capital allowance alternatives available in the UK in 2026/27
- Annual Investment Allowance (AIA): The annual investment allowance is the main type of capital allowance you’re likely to come into contact with. It covers the costs of most plant and machinery purchased for use by and for your business, up to the maximum AIA threshold of £1,000,000 per year (at time of writing).
- Full expensing (100% first-year allowance): The closest thing to a like-for-like ‘replacement’ for the enhanced capital allowances scheme is called ‘full-expensing’—or ‘100% first-year allowances’. Full expensing lets businesses claim 100% of the costs of green plant and machinery purchases tax-free.
- 50% first-year allowance: The 50% first-year allowance does what it says on the tin—it lets businesses claim up to 50% of plant-and-machinery procurement costs tax-free.
- Investment Zone enhanced allowances: There are certain zones in the UK designated as special ‘Investment Zones’ or ‘Free Ports’. Businesses operating within these areas can still benefit from enhanced capital allowances, and may 100% claim eligible plant and machinery costs against their annual profits.
How the Annual Investment Allowance (AIA) works
The Annual Investment Allowance (AIA) is the principal form of capital allowance your business will use. AIA can be claimed against most new and second-hand plant and machinery purchased for use in and by the business, and provides tax relief against up to 100% of the costs. The maximum amount of AIA which can be claimed in any given tax year is £1 million. AIA is intended to help businesses offset the costs of investing in core plant and machinery. For purchases to be eligible for AIA relief, they must:
- Not be a gift
- Be used exclusively in and by your business
- Fall into one or more categories of eligibility (see below)
As described on the government’s website, eligible plant and machinery for the AIA scheme can include:
- Plant and machinery you buy to use exclusively for business, excluding company cars
- Some plant and machinery demolition costs
- Some plant and machinery installation costs
- Integral building features for your business unit(s), including:
- Lifts and escalators
- Space and water heaters
- Airconditioning
- Hot and cold water systems (excluding those for toilets and kitchens)
- Electrical systems like lighting
- Some fixtures like fitted kitchens, bathroom suites, fire alarm and CCTV systems, so long as they are exclusively for business use
The AIA can be accessed by a wide range of company structures and even unincorporated businesses, including sole traders.
How full-expensing (the 100% first-year allowance) works
Full-expensing is the capital allowance scheme that has arguably most directly replaced enhanced capital allowances (ECAs). Full-expensing allows you to claim 100% of the first-year costs of new ‘main rate’ plant and machinery tax-free.
Not all eco-friendly products are eligible for the scheme, but the entire first-year costs of those which are can be offset against profits before corporation tax is calculated.
For plant and machinery to qualify for full-expensing it must be new and unused, purchased by your business, and fall into the ‘main rate’ category of equipment. Only incorporated businesses subject to Corporation Tax can file for 100% first-year allowances.
How half-expensing (the 50% first-year allowance) works
Half-expensing works exactly like full-expensing, except instead of offering businesses 100% tax relief for eligible purchases, this scheme offers 50% tax relief. For plant and machinery to qualify for half-expensing, it must be new and unused, purchased by the business, and belong to the ‘special rate’ pool of plant and machinery.
How ‘Investment Zone’ enhanced capital allowances works
Only companies operating within special tax sites called ‘Investment Zones’ or ‘Freeports’—such as in Leeds City Region Enterprise Zone and the Humber Freeport areas in Yorkshire—still have full access to the enhanced capital allowances scheme.
Companies working in Investment Zones and Freeports are able to offset 100% of the costs of green plant and machinery against their annual tax bill, provided the products are bought for use within these zones.
Eligible plant and machinery must be energy-efficient, and thus can include:
- Electric cars and cars with zero CO2 emissions (other company cars may or may not qualify as a capital allowance)
- Plant and machinery for gas refuelling stations
- Goods vehicles with zero CO2 emissions
- Plant and machinery for electric vehicle (EV) charging points
- Plant and machinery for use in special tax sites such as Freeports and Investment Zones
How capital allowances benefit business
Just like enhanced capital allowances once did, other financial incentives like the Full-Expensing scheme can be of great benefit to almost any business, big or small, and no matter the industry. When you make an eligible investment, for example—such as purchasing an electric company car, installing lifts in your office building, or running a fleet of zero-emission delivery vans—you may be able to write the entire first-year costs of that investment off, tax-free.
Capital allowances can therefore benefit a business in three key ways:
- Capital allowances reduce your total amount of taxable end-of-year profit, thus reducing your corporation tax bill.
- Capital allowances make the process of investing in green plant and machinery more accessible to smaller businesses, who know that green investment is effectively recouped by tax savings at the end of the year.
- Tax-free investment in green plant and machinery provides businesses with the potential for further operational cost reductions in future, since zero-emission technology tends to prove less costly than its carbon-intensive counterparts.
The future of capital allowances and business rates
Schemes like enhanced capital allowance and, more recently, full-expensing on plant and machinery purchases are in line with the UK government’s current economic goals. According to present Chancellor of the Exchequer, Rachel Reeves:
“Our economy isn’t broken, but it does feel stuck. That’s why growth is our number one mission. We want to see thriving high streets and small businesses investing in their future, not held back by outdated rules or strangled by red tape.”
In this context, those schemes brought in to replace enhanced capital allowances may prove a cornerstone of the government’s attempts to bolster the future of business in a Net Zero economy.
Conclusion: Making the most of enhanced capital allowance Alternatives
His Majesty’s Revenue and Customs offers a range of capital-cost tax incentives to businesses to aid with the procurement of both essential and energy-efficient plant and machinery. Up to 100% of the first-year costs of eligible plant-and-machinery purchases may be written off against your, via any of four alternatives to the now-defunct ‘enhanced capital allowances’ scheme.
Financial incentives like full-expensing and enhanced capital allowances for UK Investment Zones not only make it more financially feasible to invest in a greener, cost- and energy-efficient future, but also free up more room in your £1M annual investment allowance (AIA): the primary form of capital allowance.
When allowances like first-year expensing and AIA are used in combination, businesses are able to make potentially huge savings on their tax bills each year, whilst simultaneously acquiring the plant and machinery they need to grow.
You can ensure that your business is making the most of its capital allowance potential by speaking with a trusted local business tax advisor today.
