One of the first questions savvy business owners ask before spending on their workplace is a sensible one: is an office refurbishment tax deductible? The short answer is that a good part of it often is — but not always in the way people expect, and rarely all in one go. How much relief you get depends on what the work involves and how HM Revenue & Customs treats each element. This plain-English guide explains the basics for UK SMEs. It is general information rather than tax advice, so always confirm the detail with your accountant.
Is an office refurbishment tax deductible?
Broadly, spending on your office falls into two camps for tax. Some of it counts as a repair — a revenue cost you can usually deduct from your profits in the year you spend it. The rest counts as capital — money spent on improving or creating an asset — and that is relieved more slowly through the capital allowances system. Most refurbishments are a mix of the two, which is why a clear, itemised quote is so useful: it helps your accountant split the spend correctly.
Repairs versus improvements: why the difference matters
The line between a repair and an improvement matters because repairs tend to give faster tax relief. Replacing worn carpet tiles or repainting tired walls usually looks like a repair — you are restoring what was there. Reconfiguring the whole floor, adding new partitioned offices or installing air conditioning where there was none looks like an improvement, and is treated as capital. The distinction can be subtle, and it is exactly the sort of thing worth checking with an accountant before the work rather than after.
What are capital allowances?
Capital allowances are the mechanism that lets you claim tax relief on capital spending. For qualifying “plant and machinery”, the Annual Investment Allowance (AIA) currently gives 100% relief on up to £1 million of spend in a year, so many SME refurbishments can be written off in full straight away. Companies also benefit from full expensing, which gives 100% first-year relief on qualifying main-rate plant and machinery with no upper limit. In practice that means a large slice of a fit-out can attract immediate tax relief — provided it qualifies.
What parts of a fit-out usually qualify?
Plenty of what goes into an office counts as plant and machinery or as “integral features” of a building. Items that commonly qualify include:
- Air conditioning, heating and ventilation systems.
- Electrical and lighting installations, and general power.
- Water, plumbing and sanitary fittings.
- Fitted kitchens and tea points.
- Data and security cabling, alarms and access control.
- Certain moveable partitioning and fitted furniture.
Because these items often make up a large share of a fit-out, the qualifying element can be surprisingly high — which is why keeping a detailed, itemised breakdown of your spend is so valuable.
What usually does not qualify?
The building itself and its structure generally do not qualify for plant and machinery allowances — think structural walls, the fabric of the building and the land. Some of this may instead attract the Structures and Buildings Allowance, which gives relief at a flat 3% a year over a long period. It is far slower than the reliefs on plant and machinery, but it is not nothing, and it is another reason to itemise costs carefully.
Does it matter if you lease rather than own?
It is a common worry, but leasing your office does not shut you out. As a tenant you can generally claim capital allowances on your own qualifying expenditure on the fit-out, even though you do not own the building. The lease still matters for other reasons — reinstatement obligations and landlord consent, for example — so the tax position is best considered alongside your lease terms rather than in isolation.
What changed for 2026?
A few points are worth knowing if you are planning work now. Full expensing for companies continues, and the AIA remains at £1 million. From 1 April 2026 the writing-down allowance on the main pool falls from 18% to 14%, which slightly slows relief on spending that does not attract a first-year allowance. A new 40% first-year allowance was also introduced from 1 January 2026 for main-rate plant and machinery. Rates and rules change, so treat these as a prompt to check the current position with your accountant, not as a final answer.
The practical takeaway
So, is an office refurbishment tax deductible? Usually a meaningful part of it is — some as an immediate repair, much of the rest through capital allowances, with the building fabric relieved more slowly. The two things that help you claim everything you are entitled to are a detailed, itemised quote and a good accountant working from it. At Beem Interiors we itemise every quote clearly, which makes your accountant’s job — and your claim — much easier. Get in touch for an honest, itemised quote and a no-obligation chat about your project.
Please note: this article is general guidance, not tax advice. Beem Interiors is a fit-out and refurbishment contractor, not a tax adviser, so always confirm your position with a qualified accountant.
How much of a fit-out typically qualifies?
There is no fixed percentage — it depends entirely on the mix of work — but on a typical office fit-out a large share of the spend sits in areas that often qualify as plant and machinery or integral features, such as lighting, power, heating and cooling, and fitted kitchens. The structural and decorative elements make up the rest, some of which may attract the slower Structures and Buildings Allowance. The only reliable way to know your own split is to have each element priced separately, then let your accountant apply the current rules to those figures. A single lump-sum quote makes that job much harder and can leave relief on the table.
This is one of the quiet advantages of working with a contractor who itemises everything: the same detailed quote that helps you compare prices fairly also gives your accountant exactly what they need to maximise your claim.
Related reading (internal links)
- How Much Does an Office Fit-Out Cost in London? (2026 Price Guide)
- The Hidden Costs of an Office Refurbishment (and How to Avoid Them)
- The ROI of an Office Refurbishment: Does It Really Pay Off?
