The UK’s small business sector forms the backbone of the national economy. With 5.7 million SMEs operating across the country in 2025, including 5.4 million micro businesses, these enterprises represent 99.9% of all UK businesses.
Yet according to tax experts, a significant number of these businesses are overpaying on property taxes and missing out on capital allowances that could provide much-needed funds for growth, hiring, and innovation.
Chris Roberts, Managing Director of Capital Allowance Review Service, points to a fundamental problem in how the current system operates. “We’re seeing successful small businesses leave substantial sums on the table simply because they don’t know what relief they’re entitled to,” he explains. “While large corporations have dedicated tax teams to navigate these claims, most SMEs are operating without that specialist support.”
Below, Roberts identifies the key flaws in the current property tax relief system and outlines practical reforms that could unlock significant economic potential for UK small businesses.
Capital allowances allow businesses to recover money spent on commercial property improvements, from refurbishments to energy-efficient upgrades. The system is designed to ease the financial burden of property investment and encourage businesses to improve their premises. However, for many SMEs, the reality falls short of this intention.
“The system has become too complex and outdated for the businesses it’s meant to help,” says Roberts. “Unlike large corporations with in-house tax specialists, smaller businesses often lack the resources to understand what they’re entitled to claim. This results in billions of pounds going unclaimed each year, and the money could be reinvested into staff, equipment, or expansion.”
Modern SMEs are investing in the kinds of improvements that should qualify for capital allowances. They’re creating flexible office spaces to attract talent, building tech-enabled retail environments to compete online, and implementing sustainable property upgrades to reduce running costs, but the current tax rules struggle to keep pace with these business needs.
The problem is particularly acute for businesses without specialist tax advisors. The rules around what qualifies for relief can be difficult to interpret, and the claims process itself requires detailed technical knowledge about property fixtures and fittings.
“We regularly speak to business owners who’ve spent tens of thousands on property improvements without realising they could claim relief,” Roberts notes. “They’re making smart investments in their premises, but they’re not aware of the tax benefits available to them. The result is that eligible claims go unmade, cash flow suffers, and opportunities for growth are lost.”
Modernising the capital allowances system could unlock substantial economic potential for UK SMEs. Roberts outlines several practical reforms that would make the system more accessible:
The current claims process is too technical and time-consuming for many small businesses to navigate alone. Clearer guidance and digital submission systems would make it easier for SMEs to identify qualifying expenditure and submit claims without needing specialist advisors.
“We need a system where a business owner can understand what they’re entitled to without needing a degree in tax law,” says Roberts. “Digital tools could walk businesses through the process step by step, flagging potential claims based on the type of work they’ve done.”
Many SME owners simply don’t know that capital allowances exist or how they might apply to their business. Government-led awareness campaigns targeted at small business owners could address this knowledge gap.
“HMRC could work with business groups and industry bodies to reach SMEs directly,” Roberts suggests. “When businesses are planning property improvements, that’s when they need to know about available relief, not years later when they happen to hear about it.”
With the UK working towards net zero targets, linking capital allowances more explicitly to energy-efficient upgrades would serve both economic and environmental goals. Enhanced relief for green improvements would encourage SMEs to invest in sustainable property features.
“Businesses want to reduce their environmental impact, but the upfront costs can be prohibitive,” Roberts explains. “Stronger tax incentives for green property improvements would help SMEs make those investments while improving their cash flow.”
Certain sectors, such as hospitality, healthcare, and retail, tend to make significant property investments but often lack awareness of available relief. Sector-specific guidance and support could help businesses in these industries access the relief they’re entitled to.
“A hotel refurbishing its rooms or a surgery upgrading its facilities should have clear information about what relief is available,” says Roberts. “Tailored support for these sectors would ensure that businesses making necessary investments aren’t disadvantaged by the complexity of the tax system.”
Chris Roberts, Managing Director of Capital Allowance Review Service, said, “The current capital allowances system was designed for a different era of business. Today’s SMEs are nimble, innovative, and investing in modern premises that reflect how work has changed. Yet they’re navigating a tax system that hasn’t kept pace with those changes.
“Making these reforms isn’t just about helping individual businesses, though that’s important. It’s also about unlocking economic potential across the entire small business sector. When SMEs can access the relief they’re entitled to, that capital goes straight back into hiring, innovation, and growth. It creates jobs, drives productivity, and strengthens local economies.
“The businesses we work with are often surprised to learn how much relief they’ve missed out on. With clearer guidance, better awareness, and a modernised claims process, we could ensure that the businesses driving our economy forward have the financial support they deserve.”
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