SDLT Multiple Dwellings Relief Abolished 2024 — Complete Landlord Guide

What MDR did — and what its abolition costs portfolio landlords

Understanding the financial impact of MDR abolition requires understanding what MDR achieved and how SDLT is calculated without it:

• How MDR worked (pre-June 2024): MDR applied where a purchaser bought two or more dwellings in a single transaction or in linked transactions. SDLT was calculated by: (1) dividing the total consideration by the number of dwellings to get an average price per dwelling; (2) applying the residential rate bands (and the higher rates surcharge) to the average price; (3) multiplying the resulting SDLT figure by the number of dwellings. This produced a lower SDLT bill because the average price fell into lower rate bands, avoiding the top residential rate bands that applied when the full total was used. MDR was particularly beneficial for purchases of 2-5 dwellings where the average price fell below the higher rate band thresholds
• Post-June 2024 — standard residential rates apply to the total: Without MDR, the total consideration for a multi-dwelling purchase is subject to SDLT at the standard residential rate bands (0% up to £125,000; 2% £125,001-£250,000; 5% £250,001-£925,000; 10% £925,001-£1.5m; 12% above £1.5m) plus the 5% higher rates surcharge for additional dwellings. For a portfolio of 4 properties at £200,000 each (total £800,000): SDLT without MDR is approximately £80,000 (combining residential rates at £800,000 plus 5% surcharge). The same purchase under the old MDR regime would have attracted substantially less SDLT — the average price per dwelling was £200,000, in a lower SDLT band
• The six-dwellings rule — still available: A key alternative to MDR that survived abolition is the six-dwellings rule. Where a purchaser buys six or more residential dwellings in a single transaction, the purchaser can elect to be treated as purchasing commercial (non-residential) property for SDLT purposes. Non-residential SDLT rates are significantly lower than residential rates: 0% up to £150,000; 2% £150,001-£250,000; 5% above £250,000. Critically, the 5% higher rates residential surcharge does not apply to commercial-rate transactions. For bulk purchases of six or more dwellings — blocks of flats, portfolios — the six-dwellings rule often produces a better SDLT outcome than residential rates. Portfolio landlords structuring acquisitions of six or more dwellings in a single contract or through linked transactions should consider the six-dwellings election
• Mixed-use property relief — still available: SDLT mixed-use (or mixed property) relief applies where a transaction includes both residential and non-residential elements. If a purchase includes a residential property plus a commercial element (shop; office; land; garage; outhouse) — even a small commercial element — SDLT can be calculated using the non-residential rate bands rather than residential rates. The 5% residential surcharge does not apply. Mixed-use relief was not affected by the MDR abolition and remains available. However, HMRC scrutinises mixed-use claims carefully — the non-residential element must be genuine and not contrived solely to access lower SDLT rates

Welsh LTT MDR abolished — Scottish LBTT MDR survives

The UK's devolved transaction taxes took different approaches to MDR abolition. Jurisdiction matters significantly for portfolio purchases:

• Welsh LTT MDR abolished from 1 June 2024: The Welsh Revenue Authority (WRA) administered Welsh Land Transaction Tax MDR under the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017. Welsh LTT MDR was abolished by the Land Transaction Tax (Abolition of Multiple Dwellings Relief) (Wales) Regulations 2024, effective from 1 June 2024 — aligned with the SDLT MDR abolition date. Welsh transitional provisions also protect contracts exchanged on or before 6 March 2024. Welsh LTT portfolio purchases on or after 1 June 2024 are calculated at full Welsh LTT rates: 0% up to £225,000; 6% £225,001-£400,000; 7.5% £400,001-£750,000; 10% £750,001-£1.5m; 12% above £1.5m — plus the Higher Rates for Residential Transactions (HRR; 5% from December 2024) surcharge for additional dwellings. There is no equivalent six-dwellings rule in Wales
• Scottish LBTT MDR — NOT abolished, still available: Revenue Scotland did not abolish LBTT MDR and it remains available for qualifying Scottish multi-dwelling purchases. Scottish LBTT MDR operates on similar principles to the old SDLT MDR: purchasers of two or more dwellings in a single transaction or linked transactions can elect to calculate LBTT using average price per dwelling. The Scottish ADS (Additional Dwelling Supplement — 8% from April 2024) still applies on top of the LBTT MDR calculation. Portfolio landlords acquiring Scottish properties in bulk should review whether LBTT MDR applies and claim it via the Revenue Scotland SETS portal. The availability of MDR in Scotland represents a significant competitive advantage for Scottish BTL portfolio purchases compared with England and Wales
• Northern Ireland — SDLT applies, MDR abolished: Northern Ireland is subject to SDLT (not LBTT or LTT), administered by HMRC. The SDLT MDR abolition applies to Northern Ireland BTL purchases completed on or after 1 June 2024 in the same way as England. However, NI has different average house price dynamics — the impact of MDR abolition on smaller NI portfolio purchases may be less significant than in England due to lower absolute property values. Portfolio landlords buying in Northern Ireland should apply the same post-MDR SDLT calculation as English purchases
• Cross-border portfolio planning implications: The divergence between Scotland (MDR available) and England/Wales (MDR abolished) creates a planning consideration for landlords with portfolio acquisition strategies spanning multiple UK jurisdictions. A landlord acquiring 3 properties in Scotland and 3 in England can claim LBTT MDR on the Scottish element of the acquisition (if structured as a linked transaction or separate Scottish transactions) but not on the English SDLT element. Care is needed not to treat a unified UK-wide portfolio acquisition as a linked transaction across jurisdictions — the linked transaction rules apply within each jurisdiction separately

Impact on BTL company structures and portfolio acquisitions post-MDR

MDR abolition particularly affects landlord strategies involving company structures and bulk acquisitions. The analysis changes significantly without MDR:

• Limited company BTL purchases post-MDR: Before MDR abolition, a company buying multiple residential dwellings could claim MDR in the same way as an individual purchaser. Post-abolition, companies pay SDLT at full residential rates plus the 5% higher rates surcharge (which applies to companies without exception — unlike individuals who might be replacing a main residence). Companies do not benefit from any personal reliefs. The post-MDR SDLT cost for company portfolio acquisitions is materially higher than under the old MDR regime. The six-dwellings rule remains available for company purchases of six or more dwellings in a single transaction and should be modelled carefully for block-of-flats or large portfolio purchases
• Block-of-flats acquisition strategy: Landlords acquiring blocks of flats are most significantly affected by MDR abolition and most likely to benefit from the six-dwellings rule. A block of ten apartments purchased as a single title (i.e., as a single unregistered or freehold title) may qualify as a single dwelling for SDLT purposes rather than ten separate dwellings — in which case neither MDR nor the six-dwellings rule applies because it is technically one property. However, where apartments are sold as separate leasehold titles in a single transaction or linked transactions, each apartment is a separate dwelling and the six-dwellings rule can apply to all six or more. Landlords buying blocks of apartments should take specialist SDLT advice on whether the transaction structure qualifies for the six-dwellings election
• Modelling post-MDR portfolio acquisition costs: Post-MDR, portfolio landlords should model SDLT costs on a transaction-by-transaction basis rather than in bulk. Buying 5 properties individually (5 separate transactions) rather than in one bulk purchase does not attract MDR issues — each individual purchase is calculated separately at the relevant residential rates. However, HMRC's linked transactions rules may combine separately structured purchases if they are between the same parties or connected parties — care is needed to ensure genuinely independent purchases are not artificially linked. Portfolio acquirers should space out purchase completions and use independent conveyancers where appropriate to demonstrate independence of transactions
• SDLT surcharge refund — interaction with MDR abolition: The 5% SDLT higher rates surcharge refund applies where an individual purchases an additional dwelling, pays the surcharge, and then sells their previous main residence within 3 years. The refund is calculated on the surcharge paid. Where a multi-dwelling purchase was made under MDR before abolition, the refund calculation must be based on the SDLT actually paid (the MDR calculation). Landlords who made MDR purchases before 1 June 2024 and subsequently sold a former main residence should ensure the surcharge refund claim references the original MDR SDLT calculation — HMRC's online refund calculator may not automatically handle pre-abolition MDR transactions correctly

Alternative SDLT strategies for portfolio landlords after MDR abolition

With MDR gone, portfolio landlords need to consider alternative approaches to managing SDLT costs on multi-dwelling purchases:

• Six-dwellings election — the main remaining tool: For purchases of six or more residential dwellings in a single transaction or linked transactions, the purchaser can elect to pay SDLT at commercial (non-residential) rates rather than residential rates. The election is made in the SDLT return (SDLT1). Commercial rates (0% up to £150,000; 2% £150,001-£250,000; 5% above £250,000) are significantly lower than residential rates for high-value multi-dwelling transactions. The 5% residential surcharge does not apply to a commercial-rate transaction. Crucially, for purchases of exactly six dwellings — or where the buyer can aggregate to six by including linked transactions — the election is available. Landlords near the six-dwelling threshold should consider whether adding one more property to a transaction to reach six dwellings reduces the overall SDLT bill
• Phased acquisitions — individual transactions per property: Buying properties individually in separate transactions (with each completion genuinely separate in time and party structure) means each transaction is subject to residential SDLT only on its own consideration. The higher rates surcharge applies to each additional dwelling purchase, but there is no compounding effect of combining values into a higher rate band. A landlord buying 5 properties at £200,000 each separately pays SDLT + 5% surcharge on £200,000 five times. Under the old MDR, buying all five in one transaction with MDR produced a lower result — but the MDR difference has now been removed. Without MDR, individual transactions are often cheaper than a single bulk purchase (which now gets no averaging benefit and hits higher rate bands)
• Refund planning — SDLT surcharge refund on main residence sale: Landlords who are also owner-occupiers acquiring additional BTL properties continue to be eligible for the 3-year SDLT surcharge refund where they sell a previous main residence within 3 years of the BTL purchase. This refund mechanism was not changed by MDR abolition. Landlords buying a BTL property before selling their main residence should track the surcharge paid and monitor the 3-year refund window carefully — HMRC must be notified promptly when the main residence is sold. The refund applies to the higher rates surcharge element only, not to the underlying SDLT
• Taking professional SDLT advice: MDR abolition has significantly increased the complexity of SDLT planning for multi-dwelling purchases. The interaction of the six-dwellings rule, mixed-use relief, linked transactions, and company structures requires specialist advice for any purchase of more than two dwellings. HMRC has increased scrutiny of SDLT planning arrangements in the residential property sector — overly aggressive SDLT mitigation schemes can attract investigation and penalties. Landlords should use specialist SDLT advisers and ensure all reliefs claimed are properly documented in the SDLT return

Frequently asked questions