If you’re investing in more than one property from the same seller, be careful—there are special rules for Stamp Duty Land Tax (SDLT) that could land you with a much higher tax bill than you expect.
These rules, known as the linked transactions rules, apply in England and Northern Ireland and are especially relevant to property investors or landlords expanding their portfolio.
Here’s what you need to know before you complete multiple purchases involving the same parties.
What Counts as a Linked Transaction?
Two or more property transactions are treated as linked if:
- They involve the same buyer and seller, and
- They form part of a single arrangement or a series of related transactions
Importantly, this includes transactions made by connected people. For example, if a husband and wife each buy a property from the same seller, those purchases may still be linked for SDLT purposes.
When transactions are linked, SDLT is calculated on the total value of all the properties involved—not individually.
If all the properties are residential, the residential SDLT rates apply. If any are non-residential, the non-residential rates are used instead.
Linked Purchases in a Single Deal
If you buy multiple properties from the same seller as part of a single agreement, you’ll be taxed on the combined value—not on each property separately.
Example:
Nancy, a property investor, agrees to buy four new-build houses from a developer. Each is priced at £400,000, but she gets a 5% discount, paying £1,520,000 in total.
Because the purchases are part of one arrangement, they’re treated as linked. SDLT is worked out using the residential rates (including the 3% additional property supplement) on the full £1.52 million, which comes to £172,150.
Had SDLT been calculated separately on each house at £380,000, she would have paid £28,000 per property—a total of £112,000. In this case, the linked rules cost her an extra £60,150.
Linked Transactions Over Time
Linked transaction rules also apply when there’s a series of purchases from the same seller—even if they’re not made at the same time.
There’s no time limit between transactions. So if you buy another property from the same seller months or even years later, the earlier transaction can be re-evaluated and your SDLT bill could increase.
Example:
Farooq buys a buy-to-let property from a builder in April 2025 for £300,000 and pays SDLT of £20,000.
Later that year, he buys a second property from the same builder for £500,000. The two transactions are now treated as linked, with total consideration of £800,000.
SDLT on the combined amount comes to £70,000, which must be split between the two properties. This results in:
- £26,250 SDLT for the first property
- £43,750 SDLT for the second property
This means Farooq has to pay:
- £43,750 for the second transaction, and
- An additional £6,250 for the first transaction (on top of what he already paid)
Planning Ahead
SDLT on linked transactions can significantly increase your tax bill. If you’re buying multiple properties—especially from the same seller or developer—it’s essential to understand how the rules apply.
What might seem like a smart portfolio expansion could lead to a surprise tax cost if you don’t account for linked transaction rules.
Need Help Navigating SDLT on Property Deals?
Property tax rules can be complex, and the linked transaction rules are no exception. Whether you’re buying multiple properties or structuring a portfolio transfer, we can help you plan ahead and avoid unexpected costs.
Get in touch with Jon Davies Accountants to talk through your next property deal and ensure you’re making the most tax-efficient choices.
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