Is SDLT charged on the sale price or the total amount spent on the property?

Introduction

A common SDLT question arises where one family member buys and renovates a property, and another family member later wants to buy it. The practical concern is usually whether Stamp Duty Land Tax is worked out by reference to the amount now being paid, or by reference to the original purchase price and renovation costs.

In most cases, SDLT is charged on the consideration given for the transaction taking place now. That means the key question is not what the property originally cost to buy or refurbish, but what the buyers are giving in return for the transfer.

The Question

A homeowner bought a property in their sole name and later spent additional money on refurbishment and legal costs. Part of the original purchase funds had come from family members, but the title to the property was registered in the homeowner’s sole name.

The family members now want to buy the property from the homeowner for a stated amount which broadly reimburses the homeowner’s overall outlay. The question is whether SDLT is payable on:

• the current agreed sale price, or
• the original purchase price plus refurbishment and legal costs.

It is also relevant that the buyers intend to occupy the property as their only or main residence.

Nick’s Explanation

Nick’s central point was that SDLT is usually charged on the “chargeable consideration” given for the acquisition. In an anonymised summary, his explanation was:

“If the buyers are purchasing the property for a stated sum, and there is no other consideration such as taking over mortgage debt, granting rights back to the seller, or any other linked value passing, SDLT is generally calculated on that stated sum, not on the seller’s historic purchase cost or refurbishment spend.”

He also noted an important qualification. A family contribution towards the original purchase does not usually affect the later SDLT position unless that contribution meant the family members already had a beneficial interest in the property from the outset. If they did, the legal analysis becomes more complicated because the later transaction may not simply be a straightforward sale of the whole beneficial interest by one person to another.

On the facts presented, the view given was that if the homeowner was the sole legal and beneficial owner and was transferring the entire interest for the agreed price, SDLT would be assessed by reference to that agreed price alone.

The Law

SDLT is charged under the Finance Act 2003 on land transactions involving chargeable interests in land.

The starting point is that SDLT is calculated by reference to the “chargeable consideration” for the transaction. The relevant rules are found principally in:

• Finance Act 2003, section 42, which states that SDLT is charged on chargeable consideration
• Finance Act 2003, section 43, which explains that chargeable consideration includes money or money’s worth given for the subject matter of the transaction

In a normal sale, the chargeable consideration is the purchase price actually given by the buyer. SDLT is not charged by reference to:

• what the seller originally paid for the property
• how much the seller spent on renovations
• the seller’s legal fees or project costs
• the market value, unless a specific market value rule applies

Market value rules can apply in some special situations, but a simple transfer between connected persons does not automatically mean SDLT is charged on market value. For SDLT, the usual rule remains consideration actually given, unless a statutory deeming provision applies.

Another important point is that chargeable consideration can include more than cash. For example, if buyers take the property subject to an existing mortgage and assume liability for that debt, the debt assumed can form part of the consideration.

Analysis

Applying those rules step by step:

1. The relevant transaction for SDLT is the transfer from the current owner to the family buyers.

2. The first question is what the buyers are giving in return. If they are simply paying a cash price, that cash price is normally the chargeable consideration.

3. The original purchase price paid by the current owner is not part of the buyers’ consideration for the later transfer. It is historic expenditure and does not itself create SDLT liability on the later sale.

4. The refurbishment costs and legal expenses are also historic expenditure. They may explain why the sale price has been set at a certain level, but they are not themselves chargeable consideration for SDLT.

5. The earlier family contribution towards the purchase price is only likely to matter if, in substance, that contribution gave the family members a beneficial interest in the property at the outset. If the arrangement was that the property was always partly theirs in equity, the later transfer may need a more detailed analysis of what interest is actually being transferred and what consideration is being given for it.

6. If, however, the current owner genuinely held the whole legal and beneficial interest and is now selling that whole interest for a stated sum, SDLT is generally charged only on that stated sum.

7. If there is an outstanding mortgage and the buyers are taking the property subject to it, or otherwise assuming responsibility for secured debt, that assumed debt may increase the chargeable consideration. That must be checked carefully.

On the general facts described, the practical answer is that SDLT would ordinarily be calculated on the agreed transfer price, not on the total amount historically spent on the property.

Outcome

Where a sole owner sells a property to family members for a stated cash price, SDLT is usually payable on that price alone, provided there is no additional consideration.

That means the relevant figure is normally the amount the buyers now pay for the transfer, not the seller’s original purchase price plus renovation costs.

If the buyers will own only that property and it will be their only or main residence, the standard residential SDLT rates would usually apply rather than the higher rates for additional dwellings.

Practical Steps

Before relying on that conclusion, a buyer or seller should check the following:

• whether the seller was the sole beneficial owner, not just the sole registered proprietor
• whether any family contribution to the original purchase created a trust or beneficial share
• whether there is an existing mortgage on the property
• whether the buyers will assume any mortgage debt or other liabilities
• whether any side arrangements, retained rights, or linked transactions form part of the deal
• whether the higher rates for additional dwellings could apply on the buyers’ wider property position at completion

Useful documents to review include the transfer deed, mortgage redemption statement, source of funds records, and any written or unwritten agreement about the original family contribution.

If there is any doubt about beneficial ownership, the SDLT analysis should be checked carefully before completion, because the tax result may depend on the true substance of the earlier arrangement.

Conclusion

In a straightforward sale, SDLT is charged on the consideration given for the transfer taking place now. Historic purchase costs, renovation costs and legal expenses do not usually form part of that consideration. The main exceptions arise where there is additional consideration, such as mortgage debt being assumed, or where the earlier funding arrangement means the seller was not in fact the sole beneficial owner.

Legal References Used

• Finance Act 2003, section 42
• Finance Act 2003, section 43

This page was last updated on 22 March 2026.

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