Repairs vs Improvements: What Landlords Can Actually Deduct Against Rental Income

A new boiler, a re-plastered wall, a replacement kitchen — every landlord ends up spending on the fabric of a let property, and the tax treatment of that spending varies enormously depending on a distinction that sounds simple and rarely is. Get it right and the cost comes straight off this year's rental income. Get it wrong and it sits, unrelieved, until the property is eventually sold.

Why the distinction matters so much

Rental income is taxed on profit, not turnover, so what counts as a deductible expense directly moves the tax bill. Revenue expenditure — broadly, the day-to-day cost of maintaining a property in the condition it was in — is deductible against rental income in the tax year it's incurred, reducing profit immediately. Capital expenditure — spending that improves, adds to, or creates an asset — gets no such relief against income. Instead it is added to the property's base cost and only reduces the eventual Capital Gains Tax bill on sale, which for many landlords is years away and taxed at a different rate entirely.

The practical gap between the two is large: relief now at your marginal income tax rate, against relief later at 18% or 24% CGT, assuming you ever sell. Landlords who default to capitalising everything "to be safe" are routinely giving up in-year relief they were entitled to claim.

HMRC's test: restoration, not improvement

The core question HMRC and the courts ask is whether the work restores the asset to what it was, or makes it something better. A repair puts right wear, damage or disrepair using materials and methods appropriate to the job — it does not need to use identical materials. Where the original specification is no longer available or practical, using the nearest modern equivalent is still a repair, not an improvement, even though the result is objectively better than what was there before.

Classic examples that HMRC accepts as repairs despite involving genuinely better materials:

• Replacing single-glazed windows with double glazing, because double glazing is now the standard modern equivalent.
• Replacing a worn kitchen with a similarly sized, similarly specified modern kitchen.
• Re-rendering or re-roofing a section of a building using current materials rather than the original type.
• Rewiring a property to bring it up to current safety standards.

What tips the same work into an improvement is scope, not material quality: extending the kitchen into an adjoining room, adding a bathroom where none existed, or converting a loft into usable space are improvements because they add something the property did not have — not because the fittings are newer.

The "entirety" test — replacing a whole asset

A recurring sticking point is how much of a property you can replace and still call it a repair. HMRC's long-standing position, following case law including Odeon Associated Theatres v Jones and Conn v Robins Bros, is that even quite extensive replacement can still be a repair, provided it restores a subsidiary part of a larger asset — the roof, the wiring, a single kitchen — rather than reconstructing the property, or asset, as a whole. Replace an entire roof on a house and it is still a repair to the house. Demolish and rebuild the house and it plainly is not. Most disputed cases sit somewhere in between, and how the invoice and scope of works is described matters as much as what was physically done.

The trap most investors don't see coming: repairs needed at the point of purchase

The single most expensive mistake in this area has nothing to do with the nature of the work — it is about timing. Under the principle from Law Shipping Co Ltd v CIR, repairs that were necessary to bring a newly acquired property into a fit, lettable condition are treated as capital expenditure, even if the same work carried out on a property you already owned and had been letting for years would be a straightforward revenue repair.

The reasoning is that the purchase price is presumed to already reflect the property's disrepair — you bought it cheaper because it needed work, so the cost of doing that work is really part of the cost of acquiring a usable asset, not maintaining one you already had. This routinely catches investors who buy a run-down property specifically to renovate and let, expecting the renovation to be immediately deductible against rental income, only to find it is added to base cost instead and relieved, if at all, only on eventual sale.

There is some latitude where a property was let (even briefly, or at a reduced rent) in its pre-repair condition before the work was carried out, which can support treating subsequent repairs as revenue. This is a fact-specific area worth getting advice on before work starts, not after the invoices have already been paid, particularly on a renovate-to-let strategy where the numbers assumed revenue relief.

Replacement of Domestic Items Relief: furniture, furnishings and appliances

Furnishing a rental property sits under a separate, specific relief. Replacement of Domestic Items Relief lets landlords of unfurnished, part-furnished and fully furnished residential lets deduct the cost of replacing:

• Furniture and furnishings (beds, sofas, curtains, carpets)
• Household appliances (fridges, washing machines, cookers)
• Kitchenware

The deduction is the cost of the replacement item, capped at the cost of the nearest equivalent where you upgrade to something better, minus anything you receive for disposing of the old item. Delivery and installation costs of the replacement are included. Crucially, this relief only covers replacing something that was already there — the initial cost of furnishing a property for the first time remains capital expenditure with no income tax relief, which is a common point of confusion for landlords furnishing a property for the first time as a furnished let.

Getting it wrong in both directions costs money

Under-claiming is the more common error — treating a like-for-like modern-equivalent repair as capital "to be on the safe side" and losing immediate relief unnecessarily. But over-claiming carries real risk too: HMRC does look at large refurbishment spends on recently acquired properties, and a poorly evidenced claim that a full renovation was "repairs" on a property bought in poor condition is a common trigger for enquiry. The practical answer in both directions is the same — keep the invoices, keep photos of the condition before and after, and get the classification right (and documented) at the time, not reconstructed years later when HMRC asks. For more on what draws HMRC's attention on a property return in the first place, see our guide on HMRC enquiries into property tax returns.

Common questions

What is the difference between a repair and an improvement for tax purposes?

A repair restores an asset to its previous condition, using the nearest modern equivalent where the original specification is no longer available, and is deductible against rental income in the year it's incurred. An improvement makes the asset better than it was, adding to its value or capability beyond simple restoration, and is capital expenditure, added to the property's base cost for Capital Gains Tax instead.

Can I deduct the cost of a new kitchen or bathroom as a repair?

Replacing a worn-out kitchen or bathroom with a modern equivalent of similar size and standard is normally treated as a repair, even though the materials and fittings will inevitably be newer and better than what was removed. It only tips into an improvement if you materially change the layout, extend the space, or upgrade well beyond what a reasonable equivalent replacement would involve.

What is Replacement of Domestic Items Relief?

Replacement of Domestic Items Relief lets landlords deduct the cost of replacing furniture, furnishings, appliances and kitchenware in a let residential property, less the cost of the nearest equivalent if you upgrade and less anything received for the old item. It only covers replacements, not the initial cost of furnishing a previously unfurnished property, which remains capital expenditure.

Are repairs needed when you first buy a rental property tax-deductible?

Often not, or only partly. Under the principle from Law Shipping Co Ltd v CIR, repairs required to bring a newly acquired property into a usable, lettable condition are generally treated as capital expenditure, because the purchase price is assumed to reflect the property's poor condition. This catches many investors who buy run-down properties expecting full revenue relief on the renovation.

This article is general information, not personal tax advice, and tax rules change. Your own position depends on facts we cannot see from here — please take advice before acting on anything above.

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