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Repairs vs Improvements Tax UK, What Landlords Can Deduct Against Rental Income

The tax distinction between repairs (deductible against rental income) and improvements (capital, not deductible against income but eligible to increase CGT base cost); the entirety principle, initial repairs doctrine (Law Shipping; Odeon), and HMRC Property Income Manual guidance.

13 min readUpdated 8 June 2026Last reviewed: 2 September 2026income-taxproperty-incomerepairsimprovements
Written and reviewed by· Founder, LetSafe UKLast reviewed: 2 September 2026

The Statutory Framework, Repairs Deductible; Improvements Capital

Under ITTOIA 2005 s.272, landlords can deduct expenses incurred wholly and exclusively for the purposes of their property business. Under s.33, no deduction is allowed for capital expenditure. A repair maintains the property in its existing state, revenue expenditure; deductible in the year incurred. An improvement enhances the property beyond its existing state, capital expenditure; not deductible against rental income but eligible to increase the CGT base cost (reducing the gain on future disposal). HMRC's Property Income Manual (PIM2020-PIM2055) applies these principles to common landlord scenarios. The same rules apply to companies under CTA 2009 ss.53-54.

  • ITTOIA 2005 s.33: no deduction for capital expenditure; the fundamental rule preventing improvement costs from being deducted against rental income
  • Repair = maintaining existing state: deductible in the year incurred; reduces rental profit immediately
  • Improvement = enhancing beyond existing state: capital; not deductible against income; increases CGT base cost for future disposal
  • HMRC PIM2020-PIM2055: detailed guidance on common scenarios; the starting point for any landlord expenditure analysis
  • Company landlords: CTA 2009 ss.53-54 applies the same principles; no deduction for capital expenditure against company property profits

The Entirety Principle, What Asset Is Being Repaired?

The 'entirety' is the relevant asset for the repair/improvement distinction. O'Grady v Bullcroft Main Collieries Ltd (1932) established that a new engine is a repair to the ship (the entirety), not a separate improvement. For a landlord, the entirety is typically the whole building. Replacing the entire roof to restore it to its function of keeping the building weathertight = repair to the building (entirety), even if the new roof is better quality. Replacing single-glazed windows with double-glazed units = HMRC treats the upgrade element as capital improvement (beyond the existing single-glazing standard); replacing like-for-like double-glazing with double-glazing = repair. Remodelling, reconfiguration, or adding new rooms = capital improvement (altering the asset, not maintaining it).

  • Entirety = the whole building for a let property: the relevant asset; individual components are parts of the whole
  • New roof replacing old roof: repair to the building even if the new roof is of better quality, the function is maintained, not added to
  • Single to double glazing: HMRC treats the upgrade element as capital; like-for-like double-glazing replacement = repair
  • Remodelling and reconfiguration: altering the asset rather than maintaining it = capital improvement
  • Replacing whole component: raises improvement risk; the entirety principle helps argue repair where the component serves the same function

The Initial Repairs Doctrine, Newly Acquired Properties

Law Shipping Co Ltd v IRC [1923]: expenditure to bring a newly acquired asset into a usable state is capital, not deductible revenue repair. Odeon Associated Theatres Ltd v Jones [1971]: confirmed and applied to property, works on a dilapidated property acquired at a discounted price to bring it to a lettable standard are capital (the discounted price reflects the dilapidated state; the works restore the asset to the capital value paid). HMRC's PIM2030 applies the doctrine where: the property was unusable for the business when acquired; the purchase price reflected the dilapidated state; the works were necessary to make it usable. Initial repair costs add to CGT base cost rather than being deducted against rental income. To reduce the risk: let the property (even briefly, in its existing state) before commencing works.

  • Law Shipping [1923]: expenditure to put an asset into a usable state = capital, not revenue; the initial repairs doctrine
  • Odeon [1971]: property acquired at discount reflecting dilapidation; works to bring to lettable standard = capital
  • HMRC PIM2030 conditions: (1) unusable when acquired; (2) price reflected dilapidation; (3) works necessary for use, all three typically required
  • Capital consequence: initial repair costs increase CGT base cost; not deductible against rental income in the year of works
  • Mitigation: let the property briefly in its existing state before carrying out major works; breaks the 'unusable when acquired' argument

Common Expenditure, How HMRC Treats It in Practice

Practical application of the repair/improvement distinction: roof replacement (like-for-like) = repair; adding insulation or green roof = capital. Kitchen/bathroom like-for-like replacement = repair; upgrade in specification or layout change = capital. Boiler replacement with equivalent = repair; heat pump replacing gas system = capital; adding heating where none existed = capital. Rewiring to restore safe occupation = repair (where existing wiring failed); new damp proof course installation where none previously existed = capital improvement; restoration of a failed DPC = repair. Extensions and loft conversions = always capital. Replacement domestic items relief (RDIR under ITTOIA 2005 s.311A): from April 2016, landlords of furnished residential lets can deduct the cost of replacing domestic items (sofas; beds; white goods; floor coverings) on a like-for-like basis, replacing with a better item allows deduction only of the equivalent replacement cost.

  • Roof (like-for-like): repair; adding insulation or green roof = capital improvement
  • Kitchen/bathroom: like-for-like replacement = repair; specification upgrade or layout change = capital
  • Boiler equivalent replacement: repair; heat pump replacing gas system = capital; new heating system where none existed = capital
  • Extensions and loft conversions: always capital; additions to the building cannot be repairs
  • RDIR (ITTOIA 2005 s.311A): deduct cost of replacing domestic items like-for-like in furnished lets; upgrade excess is capital; applies from April 2016

Found a gap or disagree with something?

Reply to any LetSafe email or write to Richard@letsafeuk.co.uk. We rewrite guides when we get something wrong, the sooner we hear, the sooner we fix it.

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