Scottish LBTT Additional Dwelling Supplement: 8% on Entire Price, 36-Month Replacement Window

If you are buying a residential property in Scotland and you already own another dwelling anywhere in the world, the Additional Dwelling Supplement applies on top of the standard Land and Buildings Transaction Tax calculation. The current ADS rate is 8% of the entire purchase price (not a marginal surcharge), in force from 5 December 2024 after the Scottish Budget 2025/26 uplift from 6%. The structure is materially different from England's SDLT 5% additional dwellings surcharge (which sits on top of each standard band) and from the Welsh LTT higher residential rates (a standalone band structure). This page covers the flat-on-total-price ADS mechanic, the £40,000 de-minimis, the 36-month replacement-of-main-residence window, the joint-buyer aggregation rule under LBTT(S)A 2013 Sch 2A para 5(2), and the corporate-buyer position.

If your purchase is in England or Northern Ireland, the regime is SDLT plus the 5% additional dwellings surcharge under FA 2003 Sch 4ZA: see our SDLT rates and surcharge pillar. If your purchase is in Wales, the regime is the Welsh LTT higher rates (5% to 17% standalone bands) under LTTA 2017 Sch 5: see our Welsh LTT higher rates page. This page is the Scottish-only counterpart.

The short answer: 8% on the entire purchase price

The single most operationally important point about Scottish ADS is the flat-on-total mechanic. Where the £40,000 de-minimis is crossed, ADS at 8% applies to the entire chargeable consideration, not to the slice above £40,000 and not to the slice above the LBTT nil band. A £180,000 second-home purchase therefore attracts £14,400 of ADS in full (8% of £180,000), on top of any standard LBTT due on the bands above £145,000.

The structure produces materially higher surcharge figures than buyers familiar with the SDLT marginal-band-plus mechanic expect. An English investor accustomed to the SDLT 5% surcharge stacking on each band typically calculates a £400,000 purchase as £20,000 of additional SDLT (5% on each of the £400,000 of bands); the Scottish ADS equivalent on the same purchase is £32,000 (8% on the total) plus the standard LBTT on bands above £145,000. The differential is not subtle and matters at every price point above £40,000.

The 5 December 2024 rate increase

The current 8% ADS rate took effect on 5 December 2024, announced in the Scottish Budget 2025/26. The previous rate was 6%, in force from 16 December 2022. The Scottish Budget 2026/27 confirmed that the 8% rate will be maintained for the year, with no further change scheduled.

The rate-step history since ADS was introduced under the LBTT (Amendment) (Scotland) Act 2016 has gone in one direction: 3% from 1 April 2016 to 24 January 2019, then 4% from 25 January 2019 to 15 December 2022, then 6% from 16 December 2022 to 4 December 2024, and now 8% from 5 December 2024 onwards. Each step has been politically framed as a measure to manage second-home and BTL acquisition demand; the current 8% rate is the highest dwelling-surcharge rate of any UK jurisdiction.

The Scottish policy rationale for the upward trajectory has been consistent: ADS is positioned as a structural lever on residential property supply, with the surcharge revenue going to general taxation and the deterrent effect framed as supporting first-time buyers and main-residence purchasers against investor competition. The 2024 increase to 8% accompanied the Scottish Government's broader housing emergency framing, where rural and tourist-area communities had identified second-home concentration as a constraint on local housing access. Sessions advising Scottish BTL acquirers and second-home buyers should treat further upward rate-steps as a live political possibility, but the 2026/27 budget confirmed the rate at 8% for the year.

The £40,000 de-minimis

ADS does not apply where the chargeable consideration for the new Scottish purchase is below £40,000. The threshold is set in LBTT(S)A 2013 Sch 2A paras 2(1)(b) and 3(1)(b). The £40,000 figure is a hard cliff-edge: a £39,999 purchase attracts no ADS, but a £40,000 purchase attracts £3,200 of ADS (8% of the full £40,000), not £0. There is no taper, no marginal band, no smoothing across the threshold.

For transactions with effective dates on or after 1 April 2024, the £40,000 figure also applies to the value of the previously-owned dwelling that triggers the surcharge. Under the 1 April 2024 amendment, a previously-owned share in a jointly held property counts towards the ADS trigger only if the value of the individual share is £40,000 or more. A buyer with a 25% inherited share in a family home worth £140,000 (so a £35,000 individual share) does not have a triggering ownership interest for ADS on a new Scottish purchase, even though they previously owned a stake in a residential dwelling. The amendment was a targeted relieving change for buyers with small inherited shares.

The 36-month replacement-of-main-residence window

The replacement rule sits in LBTT(S)A 2013 Sch 2A para 2(2). Where the buyer is replacing their main residence, ADS does not apply to the new purchase provided the previous main residence is sold (or has been sold) within 36 months either side of the new purchase's effective date.

The window works in both directions:

• Selling first, then buying within 36 months: the replacement condition is met at the effective date of the new purchase. ADS does not apply at all and no return-amendment is needed.
• Buying first, then selling within 36 months: ADS is paid at completion (because the replacement condition is not yet met at the effective date). When the previous main residence sells within the 36-month window, the buyer claims a repayment from Revenue Scotland under Sch 2A para 2(2).

The 36-month window is an extension of the original 18-month window via the Coronavirus (Scotland) (No.2) Act 2020 (in response to pandemic-era completion delays). The extension was subsequently made permanent. Sessions advising clients with overlapping property transactions should use the current 36-month figure throughout; the legacy 18-month figure continues to circulate in older guidance materials and is no longer the operative position.

Joint-buyer aggregation under Sch 2A para 5(2)

Where two or more buyers are joint legal owners on the title to a new Scottish purchase, Sch 2A para 5(2) provides that the ADS conditions are satisfied if they are satisfied in relation to any one of, or more than one of, the buyers. The practical effect is that any joint buyer's existing dwelling-ownership triggers ADS on the whole transaction at 8% of the entire purchase price, regardless of which buyer is paying or which buyer's name appears first on the title.

Spousal aggregation works through this mechanism. A married couple or civil partnership where one spouse owns an existing dwelling and the other does not, and where both spouses are joint buyers on a new Scottish purchase, triggers ADS on the whole transaction at 8%. The non-property-owning spouse is treated as a joint buyer for ADS purposes because they are a joint buyer; the existing-property-owning spouse triggers the conditions. The mechanism is structurally parallel to the SDLT spousal-aggregation rule under FA 2003 Sch 4ZA (and to the Welsh LTT higher-rate spousal aggregation under LTTA 2017 Sch 5 para 25), but the Scottish statutory anchor is Sch 2A para 5(2) of LBTT(S)A 2013. Sessions advising cross-border families with property in more than one UK jurisdiction need to track the aggregation triggers separately in each jurisdiction; the substantive position is similar across the three but the statutory citations differ.

Our forthcoming sibling page covers the SDLT spousal-aggregation question in depth alongside the Welsh and Scottish equivalents; the manager will hyperlink that page at merge once it ships.

Three worked examples at Scottish price points

Mr McGregor, single buyer, Inverness BTL at £180,000

Mr McGregor is buying a one-bedroom flat in Inverness for £180,000 as a buy-to-let. He owns and lives in his own home in Edinburgh; the Inverness flat is an additional dwelling.

• ADS: 8% on the full £180,000 = £14,400.
• Standard LBTT: £0 on the first £145,000 (nil band); 2% on the £35,000 from £145,001 to £180,000 = £700.
• Total LBTT + ADS: £15,100.

The same purchase in England under SDLT plus the 5% additional dwellings surcharge would generate £10,100 in total: standard SDLT of £1,100 (zero on the first £125,000, 2% on the £55,000 slice from £125,001 to £180,000) plus 5% additional dwellings surcharge applied to the full £180,000 (£9,000). The Scottish position at £15,100 is therefore approximately £5,000 more expensive than the English equivalent on this typical BTL price point, driven primarily by the ADS rate being 8% versus the SDLT surcharge being 5%, and the differential widens at higher price points.

Mr and Mrs Cameron-Ross, joint buyers replacing their main residence, Stirling at £350,000

Mr and Mrs Cameron-Ross are relocating from Glasgow to Stirling. They are buying a four-bedroom house in Stirling for £350,000 and plan to sell their current Glasgow main residence within 12 months of the new purchase. The Glasgow property is currently their only dwelling. They are jointly buying the Stirling property.

At completion of the Stirling purchase, the Cameron-Rosses still own the Glasgow home (it has not yet sold). The replacement-of-main-residence condition is not satisfied at the effective date because the disposal has not yet happened. They pay ADS initially:

• ADS: 8% on £350,000 = £28,000.
• Standard LBTT: £0 on first £145,000; 2% on £105,000 (£145,001 to £250,000) = £2,100; 5% on £75,000 (£250,001 to £325,000) = £3,750; 10% on £25,000 (£325,001 to £350,000) = £2,500. LBTT = £8,350.
• Total at completion: £36,350.

Eight months later they sell the Glasgow home. The sale completes well within the 36-month window. The Cameron-Rosses file an ADS repayment claim with Revenue Scotland, attaching the Glasgow disposition document and proof-of-main-residence-occupation evidence. Revenue Scotland processes the claim within the 10-working-day target and refunds the £28,000 of ADS. Net effective LBTT on the Stirling purchase: £8,350.

Fraser Properties Ltd, corporate buyer, Aberdeen acquisition at £400,000

Fraser Properties Ltd is a Scottish-incorporated property investment company. It is buying a four-flat townhouse in Aberdeen for £400,000 to convert to a buy-to-let portfolio. The company is a non-natural-person purchaser, so it is automatically within the ADS trigger.

• ADS: 8% on £400,000 = £32,000.
• Standard LBTT: £0 on first £145,000; 2% on £105,000 = £2,100; 5% on £75,000 = £3,750; 10% on £75,000 (£325,001 to £400,000) = £7,500. LBTT = £13,350.
• Total: £45,350.

Note that Scotland does NOT operate the SDLT-style 15% flat rate that applies in England under FA 2003 Sch 4A to non-natural-person purchases of dwellings worth over £500,000; if Fraser Properties had been buying in England at the same price point, the 15% flat rate would not have applied (because £400,000 is below the £500,000 threshold) but the SDLT main rates plus 5% surcharge would have. At higher corporate purchase prices (above £500,000 in England), the divergence between Scotland and England widens substantially. The Scottish corporate-buyer decision pathway is covered on our companion page (B9 in this cluster).

How to claim the ADS repayment

Revenue Scotland operates the ADS repayment claim process through three pathways depending on who is submitting:

• Existing agents with access to the original LBTT return amend the return via the SETS portal.
• New agents (acting for a buyer for the first time) complete form RS-0005 and email it to lbtt@revenue.scot.
• Taxpayers acting in person use the online repayment claims portal at revenue.scot.

Supporting evidence typically required:

• Proof of the previous-property sale: solicitor's letter confirming completion date, the disposition or Land Registration record, or other primary evidence of the sale.
• Proof of main-residence occupation during the relevant 36-month period: council tax bills, utility bills, bank statements, or other documentary evidence that the previous property was lived in as the buyer's main residence.

Revenue Scotland aims to process repayment claims within 10 working days where the supporting evidence pack is complete. Claims submitted more than 12 months after the original LBTT return filing date require additional proof-of-sale documentation; the standard claim timeframe sits within the broader Tax Collection and Management (Scotland) Act 2014 framework of return amendment and overpayment relief.

Cross-jurisdictional comparison: the three surcharge architectures

The single most operationally significant cross-jurisdictional point in UK property tax is the structural difference between the three additional-dwelling surcharge architectures:

Item	England + NI (SDLT)	Wales (LTT)	Scotland (LBTT)
Surcharge mechanic	5% flat added to each standard band	Standalone higher-rate band table (5% to 17%)	8% flat on entire purchase price
Statutory anchor	FA 2003 Sch 4ZA	LTTA 2017 Sch 5	LBTT(S)A 2013 Sch 2A
De-minimis	£40,000 (combined with previously-owned property test)	£40,000 minor-interest threshold	£40,000 + 1 April 2024 individual-share update
Replacement window	3 years (36 months)	3 years (36 months)	3 years (36 months)
Joint-buyer aggregation	Sch 4ZA para 2(3): any buyer's existing dwelling triggers	Sch 5 para 25: any joint buyer triggers	Sch 2A para 5(2): any joint buyer triggers
Worked impact on £400k second home	SDLT £30,000 incl 5% surcharge ≈ £20,000 standard + £20,000 surcharge	Higher rate LTT ≈ £32,000 total	LBTT + ADS £45,350 (£13,350 + £32,000 ADS)

The three replacement windows have aligned at 36 months across all jurisdictions, but the surcharge architectures diverge sharply. Scotland is the most expensive on second-home purchases at most mid-market price points; Wales sits in the middle (more expensive than England at lower prices, less expensive than Scotland at most prices); England is the cheapest of the three. Sessions advising clients with second-home or BTL acquisitions in more than one UK jurisdiction need to work the surcharge calculations independently in each jurisdiction; the three statutes are not interchangeable.

Where this page fits in the wider Scottish LBTT cluster

This page covers ADS specifically. The Scottish LBTT cluster includes four companion pages that an ADS-paying buyer typically also needs to consult:

• The Scottish LBTT main rates pillar covers the underlying band table (0%/2%/5%/10%/12% with £145k nil) that sits beneath the ADS charge. Every ADS-paying buyer also pays standard LBTT on the bands above £145,000; the two amounts stack.
• The forthcoming Scottish first-time buyer relief companion page covers the £175,000 nil-band uplift mechanic, which is unavailable on any transaction where ADS applies (FTB relief and ADS are mutually exclusive on the same transaction by design).
• The Scottish corporate-buyer decision pathway covers how Scotland handles non-natural-person purchases of dwellings: standard LBTT plus ADS at 8%, with no Scottish equivalent of the SDLT 15% flat rate that applies in England under FA 2003 Sch 4A above £500,000. The decision matters at corporate purchase prices above £400,000.
• The Scottish bare-trust acquisition relief mechanics page covers the corporate-restructuring relief route under LBTT(S)A 2013 Schedule 18, which can avoid an ADS-on-corporate-acquisition outcome in defined trustee-acquisition scenarios.

For cross-jurisdictional context, the Welsh LTT higher rates page covers the Welsh standalone-band-structure equivalent (5% to 17%, in force since 11 December 2024), and the SDLT rates and surcharge pillar covers the English 5%-on-each-band mechanic. All three jurisdictions now align at 36 months for the replacement-of-main-residence repayment window, but the surcharge architectures and statutory anchors differ entirely; cross-border advisers should treat each jurisdiction's calculation as a separate workstream.

Common mistakes Scottish ADS-paying buyers (and their advisers) make

Treating ADS as a marginal-band surcharge. ADS is 8% on the entire purchase price, not 8% on the slice above £40,000 and not 8% on the slice above £145,000. Buyers and conveyancers familiar with the SDLT 5% additional dwellings surcharge (which is added to each band) routinely under-calculate ADS by treating it as a band-level addition. The flat-on-total mechanic is the largest cross-jurisdictional surprise.

Citing the 18-month replacement window. The original 18-month replacement window was extended to 36 months by the Coronavirus (Scotland) (No.2) Act 2020 and made permanent. Older guidance materials continue to cite 18 months. The current operative figure is 36 months and has been since 2020.

Citing the 6% rate (or 4% / 3%). ADS is 8% from 5 December 2024. The 6% rate was in force from 16 December 2022 to 4 December 2024 and is now legacy. The 4% rate (25 January 2019 to 15 December 2022) and 3% rate (1 April 2016 to 24 January 2019) are deeper legacy.

Putting a parent or partner with existing property on the title. The joint-buyer aggregation rule under Sch 2A para 5(2) flips a single-buyer FTB-eligible purchase into a full-ADS transaction the moment any joint buyer has an existing dwelling worth £40,000 or more. Scottish FTBs whose parents help with the deposit should keep the parents off the title.

Forgetting the corporate-buyer position. Corporate purchases of Scottish dwellings attract ADS automatically (because the corporate buyer is treated as owning another dwelling-interest). The 15% SDLT flat rate (FA 2003 Sch 4A) has no Scottish equivalent; corporate buyers pay standard LBTT main rates plus ADS at 8%, with no upper-band uplift. The economics of corporate ownership in Scotland differ structurally from the English equivalent above £500,000.