Do you pay the higher rate of SDLT if you own a buy-to-let but are buying a home to live in?

Introduction

This is a common Stamp Duty Land Tax question. A person may rent their current home, own one buy-to-let property, and then decide to buy a property to live in as their main residence. It often feels as though the new purchase should be treated as their first real home. However, the SDLT rules do not work by asking whether the new property will be your main residence in everyday terms. They ask whether, at the end of the day of completion, you own more than one dwelling and whether you are replacing a previous only or main residence within the statutory time limits.

That distinction is important. In many cases, someone buying a home to live in will still have to pay the higher rates for additional dwellings if they already own a buy-to-let personally and are not replacing a recently sold main residence.

The Question

A taxpayer personally owns one buy-to-let property. They do not currently own the home they live in because they rent. They previously owned a main residence, but that property was sold many years ago. They are now buying a lower-value residential property which will become their new main residence. The question is whether the 5% higher rate SDLT surcharge applies, even though the new property will be their home.

Nick’s Explanation

Nick’s explanation was that the answer depends mainly on ownership at the end of the day of the transaction and on whether the buyer is replacing an only or main residence under Schedule 4ZA of the Finance Act 2003.

In anonymised form, his key point was:

“If the buy-to-let is held in your personal name, the new purchase will normally be treated as an additional dwelling. If you are not replacing a main residence within the statutory rules, the 5% higher rate applies on top of the standard residential rates.”

He also explained that where a buy-to-let is owned by a limited company rather than by the individual personally, that can produce a different SDLT result for the individual’s own purchase. But in the scenario considered here, the buy-to-let was owned personally, so that distinction did not help.

Nick further noted that selling or transferring the buy-to-let after buying the new home would not create a refund if the buy-to-let was not the buyer’s previous main residence. That is because the refund mechanism is tied to replacement of a former only or main residence, not simply to reducing the number of properties owned.

The Law

SDLT is charged on land transactions under section 42 of the Finance Act 2003. A land transaction is broadly the acquisition of a chargeable interest in land under section 43, with sections 48 to 50 dealing with chargeable interests and related rules.

The higher rates for additional dwellings are contained in Schedule 4ZA to the Finance Act 2003. In broad terms, the higher rates apply if, at the end of the day of the transaction:

• the purchaser owns a major interest in another dwelling, and
• the dwelling being purchased is not a replacement for the purchaser’s only or main residence.

The surcharge is 5% above the standard residential SDLT rates.

The replacement of main residence exception usually requires the buyer to dispose of their previous only or main residence either:

• on the same day as the new purchase, or
• within the three years before the new purchase.

There are also refund rules where the old main residence is sold within the permitted period after the new purchase, but those rules only help where the property disposed of is in fact the previous only or main residence. Selling a buy-to-let does not normally satisfy that test.

Analysis

Applying the rules step by step:

1. The buyer already owns one dwelling personally. A personally owned buy-to-let counts as another dwelling for Schedule 4ZA purposes.

2. The new property will be residential and will become the buyer’s main residence. That fact alone does not prevent the surcharge from applying.

3. At the end of the day of completion, the buyer will own two dwellings: the existing buy-to-let and the newly purchased home.

4. The buyer is not replacing an only or main residence within the statutory meaning, because their previous home was sold many years earlier, outside the normal three-year window.

5. As a result, the purchase is treated as the acquisition of an additional dwelling and the higher rates apply.

For a purchase price of £150,000, the practical effect is that the transaction is taxed at the higher residential rates rather than the ordinary residential rates.

It is also important to understand what would not change the result:

• Living in rented accommodation before the purchase does not itself avoid the surcharge.
• Intending to occupy the new property as a main residence does not by itself avoid the surcharge.
• Selling the buy-to-let later does not normally create a refund, because the buy-to-let is not the previous main residence being replaced.

Nick also mentioned possible restructuring before purchase, such as transferring the buy-to-let out of personal ownership. That kind of planning can have its own SDLT and tax consequences and must be analysed carefully before any step is taken. A transfer to a company, for example, can itself trigger SDLT and may raise capital gains tax and financing issues. A trust route can also be complex and fact-sensitive.

This is not an “uninhabitable property” case, but for completeness it is worth noting that arguments that a property should be treated differently because it is not suitable for use as a dwelling now face a relatively high threshold following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Outcome

On these facts, the higher rate SDLT surcharge applies.

If a buyer personally owns a buy-to-let and is buying a new home to live in, they will usually pay the 5% higher rate if they are not replacing a previous only or main residence within the statutory time limits. The fact that the new property will be their main residence does not, by itself, remove the surcharge.

Practical Steps

If you are assessing your own position, check these points before exchange or completion:

• Do you personally own any other dwelling anywhere in the world at the end of the day of completion?
• Is that ownership a major interest for SDLT purposes?
• Are you replacing a previous only or main residence?
• If so, when was that previous main residence sold?
• Was the other property owned by you personally, or by a company or trust?
• Have you previously owned a dwelling that affects other reliefs, such as first-time buyer relief?

If you are considering transferring an existing buy-to-let before buying your new home, the SDLT position on that transfer should be reviewed first, together with any capital gains tax, mortgage, company law, trust law and beneficial ownership issues. The timing and legal structure matter.

Conclusion

Where a person still personally owns a buy-to-let and is not replacing a recently sold main residence, buying a home to live in will usually still count as buying an additional dwelling for SDLT. In that situation, the 5% higher rate normally applies.

Legal References Used

• Finance Act 2003, section 42
• Finance Act 2003, section 43
• Finance Act 2003, sections 48 to 50
• Finance Act 2003, Schedule 4ZA
• 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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