Under TCGA 1992 s.222(5)(a), a single owner with two or more residences at the same time can nominate which one is treated as the main residence for Private Residence Relief purposes. The election runs from a date the owner chooses (typically the date the second residence is acquired) and must be made within two years of first having the particular combination of residences. A variation later can shift the nomination to a different property for a period beginning no earlier than two years before the variation notice.

This page covers the single-owner mechanic in operational detail. The mechanic looks simple on the face of the statute but turns on three less-obvious points: (i) what counts as a 'residence' (the qualifying-residence test under case law including Goodwin v Curtis [1998] STC 475); (ii) the variation flag technique that captures the final-nine-months automatic deemed-occupation on a briefly-nominated property; (iii) the post-April-2020 Lettings Relief restriction that has eliminated the £40,000-additional-relief option in the typical elected-then-let scenario.

The statutory mechanic

The election sits in TCGA 1992 s.222. The relevant provisions are:

  • s.222(5)(a): "The individual may give the inspector notice in writing, before the end of the period of 2 years beginning with the date on which the individual first had a particular combination of residences, specifying which of the residences is to be treated as the individual's residence for the purposes of [the PRR provisions]."
  • s.222(5)(a) variation: A nomination can be varied by further notice; a variation may apply to periods beginning no earlier than two years before the date of the further notice. HMRC's manual at CG64500 covers the variation mechanics.
  • s.222(6): Spouses and civil partners living together can have only one main residence between them for PRR. A joint nomination signed by both is required under s.222(6)(a) post-Finance Act 1996. Pre-1996 references to s.222(5)(b) joint-signing are obsolete; the joint-signing rule sits at s.222(6)(a) in current law.
  • s.223(2)(a): The final nine months of ownership always count as deemed occupation provided the property was at some point a main residence.
  • s.223(3): Three further periods of deemed occupation apply provided the owner reoccupies the property afterwards: (a) up to three years for any reason; (b) up to four years of UK-work-relocation absence; (c) any period of employment abroad.

HMRC's helpsheet HS283 Private Residence Relief restates the two-year nomination window verbatim and works through the deemed-occupation rules. The HMRC Capital Gains Manual page CG64485 introduces the s.222(5) right and confirms HMRC's working position that the owner is not obliged to nominate the property that is factually the main residence.

The qualifying-residence test: when is a property a 'residence'?

The s.222(5)(a) election only operates where the individual has two or more residences. A 'residence' for s.222 purposes is not the same as a property owned: it requires actual occupation as a home, with some quality of permanence or settled use, even if intermittent. HMRC's working position is set out at CG64427 et seq.; the leading case is Goodwin v Curtis [1998] STC 475, with Moore v HMRC and Frosh v HMRC building on the test.

The factors HMRC and the tribunals weigh include:

  • Intention to occupy as a home. A purposive residential use, not incidental occupation. A property bought to live in for half the year, with weekday work patterns based at the other property, has a clear residential intent.
  • Length and pattern of stays. Recurring weekly weekends, regular monthly visits over a period of years, or seasonal occupation typically support residence; one or two visits a year on the way somewhere else typically does not.
  • Surrounding domestic arrangements. Council tax registration, mail forwarding, electoral roll entries, personal effects retained at the property, family members occupying alongside the owner, and personal correspondence directed to the property all support residential use.
  • Furnishings and use as a household. A property used as a fully-furnished family home with cooking, laundry and sleeping facilities used purposively is on stronger ground than a stripped-down let-prepared property occupied incidentally.

A pure buy-to-let that the owner has never occupied does not become a 'residence' for s.222 purposes regardless of how many years the owner has held it. The election is unavailable for such a property, and an attempted nomination will not survive HMRC enquiry. By contrast, a holiday cottage genuinely occupied for several weeks a year with intent to use it as a household may qualify as a residence even though the owner spends most of the year elsewhere; the test is purposive residential use, not days-spent threshold.

The two-year nomination window

The owner has two years from the date of first having the particular combination of residences to make the initial nomination. The date the combination first arose is the operative trigger: typically the date the second residence is acquired (or the date the second property becomes a 'residence' in the qualifying sense, where there is a gap between acquisition and first occupation).

The nomination is made by written notice to HMRC. There is no prescribed form; the operative requirements are:

  • The individual's name and tax reference (UTR or National Insurance number)
  • The full addresses of both (or all) residences
  • An unambiguous statement of which residence is nominated as the main residence for PRR purposes
  • The effective date of the nomination (which can be from the date the combination first arose, or any later date the owner chooses)
  • The owner's signature and the date of signature

The notice can be sent to the owner's normal HMRC office or included with the Self Assessment return for the year. A copy should be retained with the property records; the original should be sent by a method that provides proof of delivery (or HMRC acknowledgement obtained).

Where the two-year window has lapsed and no nomination was made, HMRC determines the main residence by fact-and-circumstance. The factors are similar to the qualifying-residence factors above, but the outcome is HMRC's choice rather than the owner's: the property with the strongest residential evidence wins, regardless of which property would have been more tax-efficient to nominate. The fact-and-circumstance default can sometimes produce a worse outcome than a deliberate election; the variation mechanism (described below) is still available going forward, but it cannot retrieve a missed initial window.

The variation flag technique

The variation mechanism under s.222(5)(a) lets the owner change the nomination by further notice. The variation can apply to periods beginning no earlier than two years before the date of the further notice. This is the two-years-before-further-notice rule and is the most powerful planning lever in the s.222 framework.

The flag technique uses the variation rule to capture PRR on a property that was never the actual main residence. The mechanism is:

  1. The owner nominates property A as the main residence at the start of the combination (the standard initial nomination).
  2. The owner varies the nomination to property B for a short period, supported by actual residential use of property B (perhaps a holiday-cottage period that becomes the nominated main residence).
  3. The owner varies the nomination back to property A.

The brief nomination of property B has a downstream effect: when property B is later sold, the final nine months of ownership automatically count as deemed occupation under s.223(2)(a), provided the property was 'at some point' a main residence. The brief nomination during the flag period is sufficient to satisfy the 'at some point' threshold, opening up the final-nine-months PRR on property B at disposal.

The technique is not unlimited. HMRC's anti-avoidance posture treats manifestly tax-motivated short flags with suspicion. Three points need to hold:

  • Actual residential use during the flag. The owner must have used property B as a home during the nominated period, with the qualifying-residence factors above evidenced. A purely paper nomination with no underlying occupation will not survive enquiry.
  • The variation notice must be timely. The variation can only reach back two years from the further notice; flag periods more than two years before the variation are out of scope.
  • The pattern must not look engineered. A flag of a few days timed immediately before sale, with no occupation pattern around it, attracts more scrutiny than a multi-week flag during a genuine holiday cottage stay.

The HMRC Capital Gains Manual at CG64500 covers the variation mechanics; the case-law context for anti-avoidance challenges is in Sansom v Peay and related decisions. Specialist advice is usually warranted for any flag of substance.

The integrated deemed-occupation framework

The s.223 deemed-occupation periods are critical because they determine how much PRR is available on the elected property when the owner moves out before sale. Four periods count as deemed occupation:

PeriodStatutory basisConditions
Final 9 months of ownerships.223(2)(a)Property must have been a main residence at some point. No reoccupation requirement. Always counts.
Up to 3 years for any reasons.223(3)(a)Owner must reoccupy after the absence. No restriction on the reason; can be sabbatical, family, travel, study, anything.
Up to 4 years of UK-work relocations.223(3)(b)Owner must reoccupy after; absence must be due to employment elsewhere in the UK.
Any period of employment abroads.223(3)(c)Owner must reoccupy after; absence must be for full-time employment outside the UK (or for accompanying a spouse / civil partner so employed).

The three-years-any-reason rule is often missed in older guidance. It is the most flexible because it does not require a specific work or relocation justification. The reoccupation requirement is strict for the three-year, four-year and abroad-employment categories; a sale without intervening reoccupation breaks the deemed-occupation claim for those categories. The final-9-months rule is the only one with no reoccupation requirement and is the catch-all that ensures some PRR on a former main residence even where the owner has moved on permanently.

The deemed-occupation periods stack with the actual-occupation periods to compute the PRR fraction. A property occupied as the elected main residence for 5 years, then left vacant for 2 years (sabbatical), then sold immediately after a return for renovation work, has 5 years of actual occupation + 2 years of three-years-any-reason deemed occupation + 9 months of final-ownership deemed occupation, against the total ownership period. The PRR fraction is the qualifying months divided by the total ownership months.

Lettings Relief, restricted from 6 April 2020

Lettings Relief used to provide up to £40,000 of additional CGT relief on a former main residence that was later let. From 6 April 2020, Finance Act 2020 inserted TCGA 1992 s.223B which restricted Lettings Relief to periods where the owner shared occupation with the tenant during the letting. For the typical elected-then-moved-out-then-let scenario this page describes, the owner has moved out and let to an arms-length tenant: Lettings Relief is not available because there is no shared occupation.

Older guidance asserting up-to-£40,000 Lettings Relief on a let former main residence is wrong for disposals on or after 6 April 2020. The relevant relief for the post-move-out period is the final-nine-months automatic deemed occupation under s.223(2)(a), not Lettings Relief. The arithmetic difference is material: pre-2020, an elected-then-let property might attract PRR on the elected occupation period plus £40,000 of Lettings Relief on the let period; post-2020, the same property attracts PRR on the elected occupation period plus the final-nine-months only, with no Lettings Relief.

Detail on the post-2020 Lettings Relief regime, including the narrow shared-occupation use cases where the relief still applies, sits in our Lettings Relief post-2020 changes page.

Worked example 1: holiday cottage as second residence

Eleanor lives in her London flat (acquired 2015 for £380,000) as her main residence. She bought a Cornish holiday cottage in October 2024 for £290,000 and uses it for around 8 weeks a year (school holidays, occasional weekends, a four-week summer family stay). She nominated the London flat as her main residence by notice to HMRC dated 1 November 2024, well within the two-year window from acquiring the cottage.

In June 2027, Eleanor sells the Cornish cottage for £340,000 with £8,500 of disposal costs. The flat remains her main residence throughout (the nomination has not been varied).

Cottage gain: £340,000 − £8,500 − £290,000 = £41,500

The cottage is a 'residence' for s.222 purposes (Eleanor's 8-weeks-per-year pattern, family use, council tax payments and personal effects retention support qualifying residential use under Goodwin v Curtis). However, it was not the nominated main residence at any point; the flat was nominated throughout. No PRR is available on the cottage. The final-9-months rule does not apply because the cottage was never the main residence at any point.

Taxable gain: £41,500 − £3,000 AEA = £38,500

Eleanor is a higher-rate taxpayer (employment income £80,000 in 2027/28). CGT at 24 per cent: £9,240.

If Eleanor had used the flag technique (briefly varied the nomination to the cottage during a four-week summer stay in 2025, then varied back to the flat), the final-nine-months rule would have triggered on the cottage at disposal. PRR fraction over the cottage's ownership (October 2024 to June 2027, 32 months): final-9-months / 32 = 28.13 per cent. PRR amount: £41,500 × 28.13% = £11,672. Adjusted gain: £29,828. After AEA: £26,828. CGT at 24 per cent: £6,438.72. The flag would have saved £2,801.28. This kind of arithmetic justifies the variation cost in any non-trivial scenario; specialist advice is recommended before deploying the technique because the anti-avoidance posture must be considered for any specific facts.

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Worked example 2: elected property let after moving out

Sanjay owns a Manchester townhouse (acquired May 2018 for £215,000) and a Yorkshire cottage (acquired August 2020 for £180,000). He has consistently nominated the townhouse as his main residence since the cottage acquisition. He moves out of the townhouse in May 2024 to live in the cottage permanently and lets the townhouse from June 2024. He sells the townhouse in May 2027 for £305,000 with £8,200 of disposal costs.

Total ownership of townhouse: 108 months (May 2018 to May 2027). Periods of qualifying occupation:

  • Actual main-residence occupation: May 2018 to May 2024 (72 months)
  • Three-years-any-reason absence under s.223(3)(a): NOT available, because Sanjay does not reoccupy after the absence (he sells while still living in the cottage)
  • Final 9 months under s.223(2)(a): available (townhouse was a main residence at some point), 9 months
  • Total PRR-qualifying months: 72 + 9 = 81
  • PRR fraction: 81 / 108 = 75 per cent

Gross gain on townhouse: £305,000 − £8,200 − £215,000 = £81,800

PRR amount: £81,800 × 75% = £61,350

Chargeable gain after PRR: £81,800 − £61,350 = £20,450

Less Lettings Relief: NOT available, because Sanjay did not share occupation with the tenant during the let period (the post-April-2020 s.223B restriction applies).

Less £3,000 AEA: £17,450 taxable

Sanjay is now a basic-rate taxpayer (the cottage rental income plus modest pension keeps him below the basic-rate threshold). Basic-rate band remaining: £30,270 (after his other income). CGT at 18 per cent: £3,141.

Pre-2020 the same disposal would have attracted up-to-£40,000 of Lettings Relief in addition to PRR. The post-2020 restriction has materially changed the arithmetic for the elected-then-moved-out-then-let pattern. Sanjay would also consider whether the three-years-any-reason rule under s.223(3)(a) could be engineered (would require Sanjay to move back to the townhouse before sale, even briefly), but the reoccupation must be genuine residential occupation; a short return solely to engineer s.223(3)(a) would not survive HMRC enquiry on the qualifying-residence test.

Worked example 3: variation flag on a holiday cottage

Mei owns a London flat (acquired 2012 for £420,000) and a Cotswolds holiday cottage (acquired June 2022 for £350,000). She nominated the London flat as her main residence in June 2022 within the two-year window. In August 2025 Mei takes a six-week summer stay at the cottage. On 1 September 2025, she varies her nomination by written notice to HMRC: the cottage is now nominated as her main residence with effect from 1 July 2025 (within the two-years-before-further-notice rule). On 31 October 2025, Mei varies the nomination back to the London flat with effect from 31 October 2025. The cottage was nominated as the main residence for four months.

In May 2030, Mei sells the cottage for £475,000 with £11,000 of disposal costs.

Total cottage ownership: 95 months (June 2022 to May 2030). Periods of qualifying occupation:

  • Actual main-residence-nominated occupation: July 2025 to October 2025 (4 months)
  • Final 9 months under s.223(2)(a): the cottage was 'at some point' the main residence (during the flag period), so the final 9 months qualify (August 2029 to May 2030, 9 months)
  • Total PRR-qualifying months: 4 + 9 = 13
  • PRR fraction: 13 / 95 = 13.68 per cent

Gross gain on cottage: £475,000 − £11,000 − £350,000 = £114,000

PRR amount: £114,000 × 13.68% = £15,595

Chargeable gain after PRR: £114,000 − £15,595 = £98,405

Less £3,000 AEA: £95,405 taxable

Mei is a higher-rate taxpayer. CGT at 24 per cent: £22,897.20.

Without the flag, the cottage would have been a non-residence property throughout for nomination purposes (the flat was nominated throughout), with no PRR available at all. The flag saved Mei £3,743 on this disposal. The arithmetic improves as the gain grows; for properties with embedded gains of £500,000 or more, the flag can save £30,000 or more. Specialist advice is essential for any non-trivial flag because the HMRC anti-avoidance posture must be considered against the specific facts. Mei's flag is supported by genuine six-week summer residential occupation; a flag without underlying occupation would not survive enquiry.

Worked example 4: borderline qualifying residence

Tom owns his Edinburgh flat (main residence since 2014) and a Newcastle BTL property he bought in 2019 for £140,000 (let to tenants from acquisition; never personally occupied). In 2026, Tom carries out a major refurbishment of the BTL (new kitchen, bathroom, repainting throughout) and spends 8 weeks living in the property during the refurbishment period (October to December 2026), sleeping there, eating there, and managing the work directly. He returns to Edinburgh in December 2026 and re-lets the property in February 2027.

The question is whether the 8-week refurbishment period qualifies Tom's Newcastle property as a 'residence' for s.222 purposes, opening up the possibility of a nomination + flag.

On the published HMRC working position (CG64427) and the Goodwin v Curtis line of cases, the answer is borderline. Factors against: the property was acquired purely as a buy-to-let with no original intent of residential use; the 8-week occupation is incidental to renovation work rather than purposive residential use; the property was let immediately before and after; Tom's primary household remained the Edinburgh flat throughout (council tax, electoral roll, family arrangements). Factors for: Tom did sleep and live at the property for 8 weeks; the occupation was not trivial in duration; he was managing the renovation in person rather than as an absent landlord.

The likely HMRC position is that the renovation occupation is not residential use as a home; it is incidental occupation related to property management. Tom should not assume the Newcastle property is a 'residence' for s.222 purposes and should not make a nomination on the basis of this 8-week period alone. The conservative position is to treat the Newcastle property as a non-residence throughout; the alternative is to seek specialist advice before any nomination, with clearance from HMRC under the non-statutory clearance route if the arithmetic justifies the cost.

Interaction with separation, divorce and inheritance

The s.222(5)(a) nomination is not the only PRR mechanism. Two adjacent mechanics often overlap with the election:

  • s.225B post-separation extension. Where the owner moves out of a former family home and the other spouse remains in occupation under a court order or formal separation agreement, the departing spouse may retain PRR on the former family home under s.225B Conditions A, B and C. Condition C requires that no other property has been nominated under s.222(5)(a) during the retention period. A single-owner s.222(5)(a) election made after separation on a new property may break Condition C and end the s.225B retention on the former family home. Detail in our CGT on property transfers in divorce page.
  • Inheritance under TCGA 1992 s.62 (death uplift). A property inherited from a deceased relative is acquired at the death-uplift value. The new ownership starts a fresh PRR clock: the beneficiary's period of ownership runs from the date of assent (or date of death where the inheritance is by survivorship of joint tenancy). Any election the beneficiary makes operates against the post-inheritance period only; the deceased's nomination history does not transfer. Detail in our CGT on inherited rental property page.

Records and documentation

Retain the following for any single-owner election scenario:

  • The signed and dated copy of the original nomination letter sent to HMRC, with proof of postage or HMRC acknowledgement
  • Any variation notices, similarly signed, dated and evidenced
  • Contemporaneous evidence of residential occupation for both (or all) properties for any period that may need to be evidenced as a 'residence': council tax bills, utility bills, electoral roll entries, personal correspondence, mail forwarding
  • Records of the dates of significant changes (acquiring a new residence, disposing of one, periods of absence, periods of UK or overseas employment)
  • Original purchase contracts, completion statements and capital improvement invoices for both properties (the source of the base cost for the eventual CGT computation)
  • Tenancy agreements where one of the properties has been let, with the dates of let periods documented

HMRC's standard retention period for business taxpayers is five years and 10 months from the end of the tax year of the eventual disposal. In practice retain the nomination + occupation evidence indefinitely until both properties have been sold, because the nomination history can affect the PRR fraction on either disposal, possibly many years after the events.

Where this fits in our wider CGT and PRR coverage

This page covers the single-owner s.222(5)(a) election mechanic. Adjacent depth pages: