Capital Allowances on Commercial Property: What You Need to Know

When you buy or improve a commercial property, you’re likely sitting on a valuable tax relief—one that many owners and investors overlook entirely.

Capital allowances on commercial property can unlock substantial savings by allowing you to deduct the cost of qualifying fixtures and fittings from your taxable profits. But the rules are complex, and missed opportunities are common—especially if you’re not proactively identifying them during a purchase or renovation

What Are Capital Allowances on Commercial Property?

Capital allowances are a type of tax relief available to businesses and investors who incur capital expenditure on commercial property. In essence, they allow you to deduct the cost of certain qualifying assets from your taxable profits—reducing the amount of Corporation Tax or Income Tax you pay.

When it comes to commercial property, capital allowances can apply to items that are considered part of the building but aren’t part of the structure itself. These are often referred to as “plant and machinery,” and can include things like:

• Electrical systems
• Heating and air conditioning
• Toilets and kitchens
• Fire safety systems
• Lifts and escalators
• Security systems
• Integral features like lighting or ventilation

These allowances can be claimed whether you’re buying, building, refurbishing, or fitting out a property—provided the assets meet HMRC’s qualifying criteria.

Why It Matters

For commercial landlords, property developers, and trading businesses, capital allowances offer a legitimate way to reduce your tax bill—sometimes by tens or even hundreds of thousands of pounds. Yet many fail to claim their full entitlement, often because they’re unaware of what qualifies or assume their accountant is already claiming everything.

Understanding how capital allowances apply to your property is the first step toward unlocking this underused tax relief.

What Qualifies for Capital Allowances on Commercial Property?

Not everything in a commercial building qualifies for capital allowances—but a surprising amount does. The key is understanding the difference between qualifying plant and machinery (which can be claimed) and the building itself (which generally cannot).

Common Qualifying Items

These are typically considered plant and machinery for the purposes of capital allowances:

• Electrical systems: wiring, sockets, lighting
• Heating and air conditioning systems
• Toilets, showers, and washbasins
• Kitchens used by staff or tenants
• Fire alarms and security systems
• Telecoms and data cabling
• Lifts and escalators
• Fitted furniture or display units (in certain business types)

These items are often referred to as “integral features”, which are eligible for specific types of allowances and can be highly valuable in the context of a property acquisition or fit-out.

What Usually Doesn’t Qualify

• The land itself
• Structural elements of the building (e.g. walls, roofs, floors, windows)
• Items used for business entertainment (like a staff bar or leisure area)

However, the distinction isn’t always clear-cut, especially in mixed-use or highly customised buildings. That’s why property capital allowances often require a specialist survey to properly identify all eligible assets.

Timing Matters

Importantly, capital allowances aren’t just for new builds or recent improvements. If you’re purchasing a second-hand commercial property, you may be able to claim allowances on fixtures that were already in place—but only if they’re identified and agreed during the transaction. Miss that step, and the entitlement can be permanently lost.

How to Claim Capital Allowances on Commercial Property

Claiming capital allowances isn’t automatic—and if you don’t take the right steps at the right time, you could permanently lose your entitlement. Here’s how to make sure you claim what you’re owed.

1. Identify Qualifying Expenditure Early

Whether you’re buying, refurbishing, or fitting out a property, you need to identify which fixtures and fittings qualify. For existing properties, this often means commissioning a capital allowances survey—a specialist review that itemises all eligible assets hidden within the bricks and mortar.

Without this step, businesses often miss out on significant relief because accountants may overlook hidden qualifying assets.

2. Ensure the Right Contract Clauses Are in Place

If you’re buying a commercial property, your solicitor should include specific clauses in the sale and purchase agreement to deal with capital allowances. If these aren’t addressed before completion, the buyer may lose the right to claim allowances on fixtures already embedded in the building.

HMRC requires that both parties agree on what’s being claimed, typically via an s198 election. Without it, the allowances could be lost entirely—even if the qualifying assets are still in place.

3. Submit the Claim via Your Tax Return

Once qualifying items are identified and valued, your accountant will claim the allowances via your annual Corporation Tax or Income Tax return. This reduces your taxable profit—meaning less tax to pay.

In some cases, you may also be able to carry unused allowances forward to future years or use them to reduce tax on other income (depending on your business structure).

4. Keep Evidence and Documentation

As with any tax relief, HMRC can ask for proof. Keep detailed records of:

• Surveys and valuations
• Legal agreements (e.g. s198 elections)
• Invoices and cost breakdowns
• Property acquisition details

Having this documentation ready ensures you’re protected in the event of a tax enquiry or audit.

Common Mistakes with Capital Allowances on Commercial Property

Capital allowances can be a powerful tax-saving tool—but only when applied correctly. Unfortunately, many property owners and investors miss out simply because of avoidable oversights or assumptions.

Here are the most common traps:

❌ Assuming Your Accountant Has Already Claimed Everything

Many generalist accountants don’t specialise in property or may only claim allowances for easily identifiable assets like office equipment. Embedded fixtures—such as heating systems, lighting, or ventilation—are often missed unless a specialist survey has been done.

If you’ve never had a formal review of your property, there’s a real chance money has been left on the table.

❌ Failing to Address Capital Allowances During Property Purchases

Failing to include capital allowances in the contract can cause the buyer to lose their right to claim—even if the assets are physically still in the property.

HMRC requires a formal agreement between buyer and seller (usually via an s198 election) to preserve or transfer the entitlement. Many buyers and their solicitors skip this step without realising the long-term cost.

❌ Not Claiming on Second-Hand or Older Properties

A common myth is that capital allowances only apply to new builds or recent refurbishments. In fact, allowances can often be claimed on fixtures in older or second-hand buildings, provided the purchase is structured correctly and the qualifying assets are identified.

❌ Overlooking Refurbishments and Fit-Outs

Significant tax relief can also be unlocked from internal refurbishments—including lighting, kitchens, washrooms, and data cabling. If these costs aren’t reviewed closely, the relief is often underclaimed or not claimed at all.

By recognising these mistakes—and knowing how to avoid them—you’ll be in a stronger position to claim what you’re entitled to and protect that value during any future sale.

Get in touch

Many commercial property owners miss out on valuable tax relief simply because they don’t realise what qualifies—or when to act. With the right support and a bit of planning, you can turn overlooked costs into long-term savings.

Need help reviewing your property portfolio or preparing for a purchase? Our team can guide you through the capital allowances process from start to finish—clearly, confidently, and without the jargon. Get in touch today for expert, no-fuss advice.