Do you pay higher SDLT when buying out a sibling’s share of a trust property while replacing your main home?

Introduction

This is a common Stamp Duty Land Tax (SDLT) question where a family property has been held in trust and one beneficiary later buys out another beneficiary’s share. The position can become more complicated if the buyer is also selling their current home and already owns a separate buy-to-let property.

The key issues are usually:

• whether an existing beneficial interest under a trust counts as ownership for SDLT purposes in the same way as legal title;
• whether SDLT is charged on the full value of the property or only on the amount being paid for the acquired share; and
• whether the higher rates for additional dwellings apply if the buyer also owns a let property.

The Question

A married couple are selling their current main residence and moving into another property which will become their new main residence. The new property has been held in trust following the death of family members, and the buyer is already a beneficiary under that trust together with a sibling.

The buyer is paying £272,500 to acquire the sibling’s share, after which the property will be transferred into the names of the buyer and the buyer’s spouse. The buyer also owns a separate buy-to-let flat which is rented out and is not used as the buyer’s home.

The question is whether the buyer’s existing trust interest, or the ownership of the buy-to-let flat, means that higher SDLT rates must be paid.

Nick’s Explanation

Nick’s explanation was that a beneficiary’s existing interest under a trust does not by itself trigger higher SDLT rates. In his words, the trust holds the legal title, while the beneficiary has an equitable or beneficial interest, and SDLT is concerned with the acquisition of a legal interest or major interest in land.

He also explained that, on the facts given, SDLT is charged on the £272,500 being paid to acquire the sibling’s share, rather than on the full market value of the property.

On the higher rates point, Nick’s reasoning was that owning a buy-to-let property does not automatically prevent the standard residential rates from applying if the purchase is a replacement of the buyer’s only or main residence. The crucial point is timing:

• if the old main residence is sold on or before the day the new purchase completes, the replacement main residence exception can apply, so the standard rates are used;
• if the new purchase completes first, the higher rates may be payable initially, but a refund can usually be claimed if the old main residence is sold within three years.

Using the figures provided, Nick calculated standard-rate SDLT on £272,500 as:

• £0 to £125,000 at 0% = £0
• £125,001 to £250,000 at 2% = £2,500
• £250,001 to £272,500 at 5% = £1,125

Total: £3,625.

He also noted that if the higher rates applied initially, the SDLT on £272,500 would be £17,250.

The Law

The main SDLT rules are found in the Finance Act 2003.

• Section 43(4) provides that the purchaser is the person acquiring the chargeable interest.
• Section 48(1) defines a chargeable interest as an estate, interest, right or power in or over land in England or Northern Ireland, other than an exempt interest.
• Section 117(2) defines a major interest in land as a freehold estate or a leasehold estate granted for a term of years absolute.

The higher rates for additional dwellings are contained in Schedule 4ZA to the Finance Act 2003. Broadly, those rates can apply where, at the end of the day of the transaction, the purchaser owns more than one dwelling and is not replacing their only or main residence.

For married couples and civil partners living together, Schedule 4ZA generally applies a combined test. In practice, the property interests of one spouse can affect the SDLT position of the other.

The replacement of an only or main residence is an important exception. If the buyer disposes of their previous only or main residence and buys a new dwelling intended to be their only or main residence, the higher rates may not apply, even if they still own another dwelling such as a buy-to-let.

Analysis

There are four steps in analysing this type of case.

First, identify what is actually being acquired. Here, the property is held in trust, and the buyer is already a beneficiary. That existing beneficial interest is not the same as holding the legal title personally. When the sibling’s share is bought out and the property is transferred into the buyer’s and spouse’s names, there is an acquisition for SDLT purposes.

Second, identify the chargeable consideration. On the facts given, the £272,500 is the amount paid to acquire the sibling’s share. If that is the true consideration for the land transaction, SDLT is normally calculated on that amount, not on the whole value of the dwelling.

Third, consider whether the higher rates for additional dwellings apply. The existence of a separate buy-to-let flat means the buyer already owns another dwelling. That matters, but it is not the end of the analysis. The key question is whether the new purchase is replacing the buyer’s only or main residence.

Fourth, check the timing of the sale and purchase. If the old main residence is sold before, or on the same day as, completion of the new purchase, the replacement main residence exception should normally prevent the higher rates from applying. In that case, the buy-to-let ownership does not change the outcome.

If instead the buyer completes the purchase first and still owns the old main residence at the end of that day, the higher rates are usually payable upfront because the buyer then owns multiple dwellings and has not yet disposed of the old main residence. If the old main residence is then sold within three years, a refund claim can usually be made for the higher rates element.

On the figures provided, that means:

• standard residential rates: £3,625;
• higher rates initially, if the purchase completes before the sale: £17,250;
• possible refund after the later sale of the old main residence, if the statutory conditions are met.

The trust point and the buy-to-let point should be kept separate. The trust beneficiary status does not by itself create a higher-rate charge. The buy-to-let flat only becomes relevant when considering whether the replacement main residence exception is available on the completion date.

Outcome

On these facts, the buyer’s existing beneficial interest under the trust does not by itself cause higher SDLT rates to apply.

If the buyer and spouse are replacing their only or main residence and the old home is sold on or before the day the new purchase completes, SDLT should be charged at the standard residential rates on the £272,500 consideration, giving an SDLT liability of £3,625.

Owning a separate buy-to-let flat does not prevent that result.

However, if the new purchase completes before the sale of the old main residence, the higher rates are likely to apply initially, producing SDLT of £17,250, with the possibility of a refund if the old main residence is sold within three years.

Practical Steps

To assess your own position, work through the following points carefully:

• Confirm exactly what amount is being paid for the acquired share and whether that is the full chargeable consideration for SDLT purposes.
• Check who will be named as purchasers on completion, because SDLT looks at the position of all purchasers, and spouses are often treated together for higher-rates purposes.
• Confirm whether the property being sold is genuinely your only or main residence.
• Check the intended completion dates for both the sale and the purchase.
• If you own another dwelling, such as a buy-to-let, consider whether the replacement main residence exception is available on the day of completion.
• If the purchase must complete before the sale, budget for the possibility of paying the higher rates first and reclaiming later.
• Ask your conveyancer to record the SDLT analysis clearly before filing the SDLT return.

Conclusion

Where a person buys out a sibling’s share in a trust property and moves into that property as their new main home, SDLT is usually charged on the amount paid for the acquired share. An existing beneficial interest under the trust does not by itself trigger the higher rates. A separate buy-to-let property also does not prevent the standard rates from applying, provided the transaction is a genuine replacement of the buyer’s only or main residence and the timing conditions are met.

Legal References Used

• Finance Act 2003, section 43(4)
• Finance Act 2003, section 48(1)
• Finance Act 2003, section 117(2)
• Finance Act 2003, Schedule 4ZA

This page was last updated on 22 March 2026.

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