Do married couples pay LBTT and ADS when they buy a new home together but keep their existing properties?

Introduction

This is a common question for couples in Scotland who each already own a home and then decide to buy a property together. The difficulty is that Land and Buildings Transaction Tax (LBTT) and the Additional Dwelling Supplement (ADS) do not just look at the new purchase in isolation. They also look at what each spouse or civil partner already owns and whether the new purchase is replacing a main residence or adding to an existing property portfolio.

People also often ask whether putting rental properties into a company would help, and whether ADS will apply again on a later move. The answer depends on ownership at the effective date of the transaction, whether a previous main residence has been sold, and whether the couple are treated as one unit for ADS purposes.

The Question

A married couple each own a separate residential property acquired before the relationship. They now want to buy their first home together in Scotland and move into it. Ideally, they would like to keep both existing properties and rent them out. They want to know:

• whether LBTT and ADS would be payable on the purchase of the new joint home;
• whether there is a more tax-efficient structure for holding the rental properties, especially as both are higher-rate taxpayers;
• whether ADS would apply again on a later purchase if they move from the joint home to another home; and
• whether it makes any difference if one spouse sells their existing property but the other keeps theirs.

Nick’s Explanation

Nick’s core points can be summarised as follows.

First, if the couple are buying a residential property, LBTT is charged on the purchase price in the normal way. As he put it, “if you’re purchasing the property, then yes – LBTT will be payable on the purchase price.” He also noted that if a property were transferred by gift with no chargeable consideration and no mortgage assumed, LBTT would generally not arise, but that is a different scenario from a normal purchase.

Secondly, on rental structures, Nick explained that higher-rate taxpayers often consider using a limited company to hold rental property because mortgage interest and other deductible costs are dealt with differently in a company. However, transferring personally owned dwellings into a company can itself trigger LBTT, and potentially ADS, because the company is acquiring chargeable interests in residential property.

Thirdly, on a later move, Nick explained that if the joint home is sold before the next home is bought, the next purchase may not count as an additional dwelling. But if the couple keep the joint home and buy another one, ADS is likely to apply again because they would still own another dwelling at the time of purchase.

Finally, he pointed out that for ADS purposes married couples and civil partners are generally treated as a single economic unit. In practical terms, one spouse keeping a dwelling can affect the other spouse’s ADS position. So one person selling while the other retains a property will not usually prevent ADS from applying.

The Law

LBTT is charged under the Land and Buildings Transaction Tax (Scotland) Act 2013 on chargeable land transactions where there is chargeable consideration. Residential rates apply to residential purchases.

ADS is an additional amount of LBTT charged on certain acquisitions of dwellings in Scotland. The detailed rules are contained in schedule 2A to the Land and Buildings Transaction Tax (Scotland) Act 2013. Broadly, ADS can apply where, at the end of the day of the transaction, the buyer owns more than one dwelling and the new purchase is not treated as a replacement of the buyer’s only or main residence.

For spouses and civil partners, the legislation contains special rules which broadly aggregate their positions. That means the ownership of one spouse is relevant when deciding whether the other spouse is buying an additional dwelling.

Where a purchaser is replacing their only or main residence, ADS may not apply, or if paid upfront may be reclaimable if the previous only or main residence is sold within the permitted period. The detailed replacement tests are fact-sensitive and depend on the sequence of transactions and whether the sold property genuinely was the buyer’s only or main residence.

If a property is transferred into a company, that transfer is usually treated as a separate land transaction. If there is chargeable consideration, including debt taken on by the company, LBTT can arise. If the company acquires a dwelling and already owns dwellings, or the transaction otherwise falls within the schedule 2A rules, ADS may also arise.

Where a property is said to be uninhabitable or not suitable for use as a dwelling, the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. Although that was an SDLT case, it is a useful indicator that poor condition alone will not easily take a property outside the dwelling rules unless the condition is serious enough to meet the legal test.

Analysis

In the scenario described, the couple each already own a dwelling. They then buy a new home together and intend to keep the existing dwellings as rentals.

Step one is straightforward: LBTT will be payable on the purchase price of the new home, subject to the normal residential rates and bands.

Step two is the ADS question. If, at the end of the day of the new purchase, the couple still own the two earlier properties, they will own more than one dwelling. Because they are married, the law generally looks at them together rather than separately. So even if each person only owns one existing property in their sole name, the joint purchase is still likely to be treated as an acquisition of an additional dwelling.

That means ADS would usually apply to the purchase of the new joint home unless the transaction qualifies as a replacement of an only or main residence. On the facts given, that replacement test is unlikely to be met if both existing properties are retained. The reason is simple: keeping the former homes and moving into a new one is usually an addition to the couple’s dwelling ownership, not a replacement.

If one spouse sells their existing property but the other spouse keeps theirs, that usually does not solve the problem. Because spouses are generally treated as one unit for ADS purposes, the retained property is still counted. So the new purchase can still be an additional dwelling.

The later move question depends on what they own at that later date.

• If they sell the joint home before buying the next home, and the next home is their new main residence, ADS should generally not apply because they are replacing a main residence rather than adding one.
• If they keep the joint home and buy another home, ADS is likely to apply again because they would own the earlier joint home as well as any retained rental properties.

What if they transfer their existing rental properties into a company before buying the new home? In principle, if neither spouse then owns any dwelling personally at the effective date of the new purchase, that may improve the personal ADS position on the new home. But that does not mean the transfer to the company is tax-free. The transfer itself may trigger LBTT and potentially ADS in the company, and there may also be capital gains tax and financing issues outside the LBTT analysis. So this is not a simple workaround.

As to the “most tax-efficient” rental structure, there is no universal answer. A company can be more attractive for some higher-rate taxpayers because of the corporation tax treatment of profits and finance costs, but incorporation can create immediate tax costs and ongoing administrative burdens. Personal ownership may still be preferable in some cases, especially where properties are already owned, gains have accrued, or extraction of profits from the company would be costly.

Outcome

On the facts described, the practical answer is usually:

• LBTT will be payable on the purchase of the new joint home.
• ADS is also likely to be payable if both existing properties are retained.
• If only one spouse sells and the other retains a dwelling, ADS will still usually apply because spouses are treated together.
• On a later move, ADS should generally not apply if the existing joint home is sold before the replacement home is bought, but it is likely to apply if the earlier home is retained.
• Using a limited company for rentals may be worth considering, but transferring existing dwellings into a company can itself trigger LBTT and other taxes.

Practical Steps

Anyone in this position should work through the following points before exchange and completion:

1. List every dwelling owned by either spouse or civil partner, including partial interests and overseas property where relevant.
2. Identify which property is currently each person’s only or main residence and whether any sale will take place before the new purchase completes.
3. Calculate LBTT on the purchase price of the new home.
4. Check whether the replacement of only or main residence rules can apply. If not, assume ADS is likely to be due.
5. If considering incorporation of rental properties, model the tax cost of the transfer itself, including LBTT, ADS, capital gains tax and borrowing costs.
6. Take conveyancing and tax advice before committing to the transaction structure, especially where more than one dwelling is involved.

Conclusion

Where a married couple in Scotland each already own a property and then buy a home together while keeping the earlier homes, the new purchase will usually attract both LBTT and ADS. Selling only one spouse’s property will not usually avoid ADS because the couple are generally treated as one unit. A later purchase may escape ADS if it is a genuine replacement of the main residence, but keeping the earlier home will usually bring ADS back into play.

Legal References Used

• Land and Buildings Transaction Tax (Scotland) Act 2013
• Land and Buildings Transaction Tax (Scotland) Act 2013, schedule 2A
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799

This page was last updated on 22 March 2026.

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