Bed-and-Breakfasting: What the 30-Day Rule Does (and Doesn't) Mean for Landlords

You want to sell a property to crystallise a loss, or use your CGT annual exemption and then rebuy the same property. The short answer is that it does not work, and the reason matters: it is not the rule that comes up first whenever bed-and-breakfasting gets mentioned in a tax conversation.

"Bed-and-breakfasting" is a share-side concept. The 30-day matching rule at TCGA 1992 s.106A applies to securities (shares, debentures and analogous instruments) and does not apply to direct interests in land or buildings. For property, the traps that actually bite sit elsewhere: TCGA 1992 s.17 (connected-persons disposals deemed at market value), TCGA 1992 s.18 (connected-persons losses ring-fenced), and the Ramsay-line case law for composite transactions designed to obtain a tax result. Add the reduced annual exempt amount (£3,000 from 6 April 2024) and the Part 8ZB Condition D trading-line trap, and most bed-and-breakfasting-adjacent property strategies no longer work.

What "Bed-and-Breakfasting" Was: The Historical Practice

Before Finance Act 1998, "bed-and-breakfasting" of shares was a routine tax-planning move. If you held shares at a loss, you would sell them on the open market in late March, realise the loss against general CGT gains, and repurchase the same shares the next morning. The "B&B" nickname came from the overnight stay between sell and rebuy. The result: a realised loss in the closing tax year, economic position unchanged, a new acquisition into the share pool restarting the holding period.

The same pattern was used to harvest gains inside the annual exempt amount: sell shares with an unrealised gain just inside the annual exemption ceiling, repurchase next day, rebase the holding upwards without paying tax. With the pre-2023 annual exemption at £12,300, this was a meaningful annual reset.

What Changed in 1998: The 30-Day Matching Rule

Finance Act 1998 inserted what is now TCGA 1992 s.106A. The operative provision at s.106A(5) is short: "If within the period of thirty days after the disposal the person making it acquires securities of the same class, the securities disposed of shall be identified with securities acquired by him within that period, rather than with other securities."

Read with the wider share-identification waterfall (s.105 same-day matching first, then s.106A 30-day matching, then the s.104 pool), the effect is: a sale followed by a same-class repurchase within 30 days is matched against the post-disposal purchase. The base cost of the new acquisition is the cost of the new shares, not the cost of the original holding; the original holding's base cost rolls forward unaffected. The loss-claim or gain-realisation effect of the sale is cancelled because, in substance, the holding has not been broken.

Read the rule precisely. s.106A is an IDENTIFICATION rule. It does not ban the trade. It changes which acquisition is matched against which disposal. For a same-class, same-person repurchase within 30 days, the economic effect is to nullify the loss claim or the gain you tried to shelter inside the annual exemption.

Why s.106A Does Not Apply to Direct Property

s.106A sits in the "Identification of securities" group of provisions in TCGA 1992 (ss.104 to 106A). It applies to "securities" only: shares, debentures and analogous financial instruments. Direct interests in land and buildings are not securities for the purposes of these sections. Mechanically, the matching rule is built around fungible same-class assets (one ordinary share is interchangeable with another); a property is unique (one specific dwelling at one specific address), and there is no "same class" of property to match against.

The problem the 1998 reform was solving (pooled identical-class assets, where a sell-and-rebuy could exploit the pool architecture) does not arise for direct land disposals. If you sell a BTL flat on the open market and try to rebuy the same flat, you need a willing seller (whoever bought it from you), and a circular sale-and-rebuy is unusual at arm's length.

The Actual Property-Side Traps: s.17 and s.18

For direct property the traps are TCGA 1992 s.17 (deemed market value on connected-persons disposals) and TCGA 1992 s.18 (ring-fence on connected-persons losses).

Worked example. Mr Patel owns a BTL flat acquired in 2015 for £200,000; current market value £250,000 (the property market has dipped from a recent £300,000 valuation). Mr Patel wants to sell the property to his daughter Priya for £180,000 cash, crystallise a £20,000 loss against his other CGT gains, and pass the property on at a low base cost as part of his retirement planning.

• TCGA 1992 s.17 (deemed market value). Father and daughter are connected persons under s.286(2). The disposal is treated as at market value regardless of actual consideration. Mr Patel's CGT computation uses £250,000 as the proceeds, not the £180,000 actually paid. Result: £250,000 − £200,000 = £50,000 GAIN, not the planned £20,000 loss.
• TCGA 1992 s.18 (loss ring-fence). Even if Mr Patel had structured a true connected-persons loss (property in genuine negative equity, deemed market value below original cost), the loss is ring-fenced. It is only deductible against future gains on disposals from Mr Patel to Priya specifically, not against general gains.

Combined effect: the connected-persons sale to crystallise a loss against general gains does not work at all. s.17 prevents the artificial under-pricing; s.18 prevents the loss being deductible where you want it.

Who Counts as a Connected Person

TCGA 1992 s.286 defines the connected-persons perimeter. The categories caught:

• Spouses and civil partners.
• Lineal ancestors and descendants: parents, grandparents, children, grandchildren.
• Siblings.
• Aunts, uncles, nieces and nephews via the broader s.286(4) "relative" definition.
• Partnerships and their members.
• Companies under common control (over 50 percent ownership or voting).
• Companies in the same group.

Friends and business associates without ownership or corporate-control links are not connected. Cousins sit outside the s.286(4) listed relatives and are not connected under the strict statutory definition. So "I'll sell it to my cousin's husband" might genuinely be at arm's length (cousins are not connected, and the cousin's husband is not a connected person to you absent any partnership or corporate ownership link), or it might not be (where partnership or corporate-control links run between you). Check the specific link before you assume the sale is at arm's length.

The Spouse Route: s.58 No-Gain-No-Loss and the Bed-and-Spouse Pattern

TCGA 1992 s.58 provides that disposals between spouses or civil partners living together are at no-gain-no-loss: the transferee takes the transferor's base cost, and no gain or loss arises on the transfer itself. The s.58 transfer is the route for moving an asset to the lower-rate spouse, or to the spouse who still has an unused annual exemption.

For shares, the legitimate "bed-and-spouse" pattern uses s.58 to put the share-side disposal in your spouse's hands:

1. You transfer shares to your spouse under s.58 (no-gain-no-loss; your spouse inherits your base cost).
2. Your spouse independently sells the shares on the open market to a third party.
3. The gain or loss is realised by your spouse; you have no CGT event.

The 30-day matching rule does not engage because s.106A operates on the SAME person only, and your spouse is a different person from you. The bed-and-spouse pattern remains a working post-1998 substitute on the share side.

For property, the s.58 transfer route is available, but the architecture diverges. If you want to put the property in your spouse's name and then sell to a third party, the pattern works the same way: s.58 transfer, then onward sale by your spouse. If instead you sell to your spouse rather than to a third party, s.17 and s.18 bite on that intra-couple disposal before s.58 even comes into play. And HMRC may apply Ramsay-line scrutiny where a s.58 transfer is followed almost immediately by an onward sale that was clearly pre-arranged, treating the sequence as a single composite transaction.

The Post-1998 Legitimate Substitutes (and Why They Are Share-Side)

Four legitimate substitutes for the pre-1998 share-side bed-and-breakfasting:

• Bed-and-ISA. Sell shares outside the ISA wrapper, repurchase the same class inside the ISA wrapper. The ISA manager is a different beneficial holder, so the s.106A "same person" gate does not engage. Inside-ISA growth is tax-free.
• Bed-and-SIPP. Same logic for self-invested personal pensions. Inside-SIPP growth is tax-free; the SIPP trustees are a different beneficial holder.
• Bed-and-spouse. As above. Spouse acts independently on the second leg.
• 30-day-plus wait. Sell, wait more than 30 days, rebuy. s.106A does not catch acquisitions outside the 30-day window. Market risk for the wait period is the cost of the strategy.

None of these has a direct property analogue. Direct residential property cannot be held in an ISA or SIPP wrapper (ISAs hold only listed investments; residential property is largely excluded from SIPP-eligible assets). The same physical property cannot be repurchased after a 30-day wait without a willing third-party owner in between. The spouse pattern works for property only where the spouse goes on to sell to a third party, which is then a different transaction from the bed-and-breakfasting attempt.

The Ramsay Anti-Avoidance Umbrella

Even where each individual step is legally effective, a composite transaction designed to obtain a tax result may be recharacterised by HMRC under the Ramsay line of cases (W.T. Ramsay Ltd v IRC [1981] STC 174; Furniss v Dawson [1984] STC 153; MacNiven v Westmoreland Investments [2001] STC 237; Mayes v HMRC [2011] EWCA Civ 407). The principle catches arrangements whose substance is the tax outcome rather than any commercial purpose.

Property-side bed-and-breakfasting attempts that involve circular movement of value between connected persons (sale to connected company followed by sale back; pre-arranged inter-spouse-then-third-party sequences) risk Ramsay recharacterisation. HMRC also has the General Anti-Abuse Rule under FA 2013 Part 5 in the wings for clearly abusive arrangements. The discipline is to document a commercial purpose contemporaneously and avoid engineering multi-step sequences whose only justification is the tax result.

Why the Reduced Annual Exemption Destroys the Lever Anyway

TCGA 1992 s.3 annual exempt amount stood at £12,300 in 2022/23. It was reduced to £6,000 in 2023/24 and to £3,000 from 6 April 2024 per FA 2024. The reduction is the practical reason most bed-and-breakfasting-adjacent strategies for property landlords no longer pay for the friction.

Worked illustration. Mr and Mrs Patel co-own an appreciated BTL portfolio and want to harvest gains inside their combined annual exempt amount each year:

• 2022/23 framework. £12,300 per person x 2 = £24,600 combined. A partial-disposal generating £24,600 gain is fully covered; £0 tax.
• 2026/27 framework. £3,000 per person x 2 = £6,000 combined. Same £24,600 partial-disposal target is £18,600 taxable. At residential CGT 24 percent = £4,464 tax.

The post-2023 reduction has destroyed roughly 75 percent of the value of annual-exemption-harvesting strategies for property landlords. The lever is no longer pulling weight; year-by-year time-spread realisation barely moves the needle.

The Trading-Line Trap on Repeated Transactions

If you repeatedly buy and sell properties in short cycles, even at arm's length to third parties, you sit in CTA 2010 Part 8ZB and ITA 2007 Part 9A territory. The frequency badge of trade (Pickford v Quirke (1927) 13 TC 251) plus the supplementary-work badge (Marson v Morton [1986] 1 WLR 1343) catch anyone who looks too much like a flipper. Even legitimate sale-and-rebuy patterns can accumulate into a trading classification as the volume grows, and the marginal income-tax rate plus Class 4 NIC is roughly twice the residential CGT rate.

If you are near that borderline, our guide on whether you are a property investor or developer works through the four-conditions test, the six-month associated-persons window, and the planning levers that hold a portfolio on the investment side.

So what should you actually do?

Hold the line in your head: bed-and-breakfasting is a share-side concept, the 30-day rule does not reach direct property, and the rules that bite on a property are s.17 (deemed market value on connected-persons disposals), s.18 (the connected-persons loss ring-fence), the trading-line test, and the Ramsay anti-avoidance overlay. The reduced annual exempt amount has taken most of the upside out of the harvesting strategies that used to make the friction worthwhile.

Before you sell to a family member, transfer to a spouse, or run any sale-and-rebuy pattern, get the disposal modelled against the rules that genuinely apply. That means pricing the s.17 deemed-value point, the s.18 ring-fence, the CGT residential rates (18 percent and 24 percent from 30 October 2024) and the 60-day in-year reporting deadline, and the trading-line risk, before any paperwork is drawn. If you would like that done properly on your own portfolio, the team can run a pre-disposal review and tell you, in writing, what will actually happen on the tax return.