Repair or Improvement? The Line That Changes a Kent Landlord's Tax Bill

It is one of the most common questions we hear from landlords across Kent: “I’ve just spent a few thousand pounds on the flat — can I claim it?” The honest answer is: it depends whether the work was a repair or an improvement. That single distinction decides whether you deduct the cost against this year’s rental profit or whether it waits, sometimes for years, until you sell. Getting it wrong in either direction costs money, so it is worth understanding the line.

Why the difference matters

A repair is a revenue cost. It comes straight off your rental income in the year you pay it, reducing the profit you are taxed on now. An improvement is capital. You cannot deduct it against rental income at all; instead it is added to the cost of the property and only comes into play when you sell, reducing the Capital Gains Tax on any gain. Both give relief eventually — but a repair helps you this year, while an improvement might not help for a decade.

The simple test

The guiding principle is straightforward, even if the edges are fuzzy. If the work restores the property to the condition it was in before — putting right wear, damage or deterioration — it is a repair. If it makes the property better than it was, bigger, or adds something that was not there before, it is an improvement. HMRC calls this the difference between restoring an asset and enhancing it.

Repairs you can usually deduct now

Everyday maintenance that keeps a property in good order is normally a revenue repair. Typical examples include:

• Repainting and decorating, inside and out.
• Replacing broken windows, doors, gutters and roof tiles like for like.
• Mending faulty plumbing, wiring or a broken boiler.
• Repointing brickwork and general damp or draught proofing.
• Replacing a worn-out kitchen or bathroom with a similar-standard equivalent.

That last one surprises people. Swapping a tired, standard kitchen for a new standard kitchen is a repair, because you are replacing what was there. It only tips into improvement if you noticeably upgrade — say, from a basic fitted kitchen to a high-end bespoke one.

Improvements that count as capital

Work that enhances the property beyond its former state is capital. Common examples include building an extension or loft conversion, adding a conservatory, converting a house into flats, installing something entirely new such as central heating where there was none, or a wholesale upgrade that goes well beyond a like-for-like replacement. The cost is not lost — it lifts the base cost of the property for Capital Gains Tax — but it does nothing for your income tax bill now.

The “modern equivalent” trap

A frequent worry is technology moving on. If you replace single-glazed windows with double glazing, or an old boiler with a modern condensing one, is that an improvement? Generally no. Where the market simply no longer sells the old version, using the nearest modern equivalent is still treated as a repair, not an upgrade. You are not expected to hunt down obsolete materials to keep a cost deductible. The test is whether you have genuinely enhanced the property or merely restored it using what is available today.

One trap worth knowing: buying a “doer-upper”

There is an important exception for property bought in a poor state. If you buy a run-down property at a reduced price because it needs work, and you cannot let it until that work is done, HMRC may treat those initial repairs as capital rather than revenue — on the basis that you bought a dilapidated asset and are bringing it up to standard. This catches out landlords who assume a big first-year refurbishment is automatically deductible. If you have recently bought a project in Kent, this is exactly the kind of thing to check before you file.

When work is a bit of both

Real refurbishments are rarely purely one or the other. Where a job is mostly a genuine repair with a small incidental improvement, HMRC may accept the whole cost as revenue. Where a repair and a clear improvement are bundled together, the cost usually needs splitting between the two. Keeping itemised invoices — rather than a single “refurbishment” total — makes that far easier to get right.

How MCC Partners can help

The repairs-versus-capital line is where landlords most often either overpay tax by treating a repair as capital, or invite a challenge by claiming an improvement as a repair. For landlords across Gravesend and the wider Kent area, we review your property spending, split it correctly, claim every genuine repair against this year’s profit, and keep a clean record of capital costs so you get the Capital Gains Tax relief when you eventually sell. It pairs closely with our guide to allowable expenses, so it is worth reading the two together.