Sub-Sale Relief: Schedule 2A FA2003 Explained
Sub-sale relief lets the intermediate party in an A to B to C transaction chain claim relief from SDLT, but only where the assignment or sub-sale happens before the original contract is completed or substantially performed, and is not part of tax avoidance arrangements. Timing and structure are everything.
Last verified: 29 September 2026
Key Takeaways
- •Sub-sale relief, in Schedule 2A FA2003 (brought in by s45), lets the intermediate buyer (B) claim relief from SDLT when they assign the contract, or sub-sell, to C before completion
- •C pays SDLT on the consideration under the original contract plus anything C pays B for the assignment. A minimum consideration rule applies only where B and C are connected or not acting at arm's length
- •The relief is unavailable once the original contract has been completed or substantially performed, because a later sale is simply a second transaction
- •Relief is denied where the assignment or sub-sale forms part of tax avoidance arrangements (Sch 2A para 18). Being connected does not bar relief, but it triggers the minimum consideration rule for C
- •B must claim the relief in its own land transaction return; it is not automatic
What Is Sub-Sale Relief?
Sub-sale relief is a specific SDLT relief contained in Schedule 2A to the Finance Act 2003, which section 45 brings into effect and which replaced the old sub-sale rules in 2013. It applies where the original purchaser of a property (B) does not take the conveyance of the land itself but instead assigns the benefit of the contract, or effects a sub-sale, to a third party (C) before completion takes place.
In the absence of this relief, both B and C would face SDLT charges: when C completes, B is treated as entering into a notional land transaction at the same time (Sch 2A para 5), and C is taxed on its own acquisition. The relief prevents this double taxation: B claims relief and pays nothing. C pays on the consideration under the original contract plus any consideration C gives B for the assignment (Sch 2A para 4(5)). Only where B and C are connected, or not acting at arm's length, can a higher minimum amount be substituted (paras 12 to 14).
The policy rationale is to facilitate property trading and development finance without imposing a double SDLT charge where the intermediate party never receives the legal title and acts essentially as a conduit.
Sub-sale relief applies to the assignment of rights under a contract, not to a completed sale. The critical distinction is whether the original purchaser (B) ever receives a conveyance. If B completes and then sells on, that is simply a second transaction, and no relief is available.
Conditions for Relief Under Schedule 2A
Schedule 2A FA2003 sets out the conditions that must be satisfied for B to claim relief on an assignment of rights (para 15) or a qualifying sub-sale (para 16):
Original contract: A contracts to sell to B
There must be a subsisting contract (original contract) between A and B for the purchase of the land.
Assignment before completion or substantial performance
B must assign the benefit of the original contract (or effect a sub-sale) to C before the original contract is completed. For an assignment of rights, the original contract must not have been substantially performed when the assignment was entered into (para 15(1)(b)).
Conveyance direct to C
The conveyance of the property must be made by A directly to C. B must not receive a conveyance or legal title at any point.
No tax avoidance arrangements
Relief cannot be claimed if the assignment or sub-sale forms part of arrangements whose main purpose, or one of the main purposes, is obtaining a tax advantage (para 18). Being connected with C is not itself a bar.
If the conditions are met and B claims the relief in a land transaction return (or an amendment of one), no tax arises on B's notional transaction. C files its own SDLT return for its acquisition and pays the tax. B still has to file: the relief must be claimed, it is not automatic.
Worked Example: A to B to C Chain
A developer (A) contracts to sell a residential property to an investor (B) for £400,000. Before completion, B assigns the contract to a new purchaser (C) for £450,000. A conveys the property directly to C.
SDLT Outcome With Sub-Sale Relief
B's SDLT liability (A→B contract)
Relief claimed on B's return under Sch 2A para 15
C's SDLT on £450,000 sub-sale price
£400,000 under the original contract plus £50,000 paid to B for the assignment
Without Sub-Sale Relief
Without the relief, B would pay £10,000 SDLT on its £400,000 notional transaction, AND C would pay £12,500 on its £450,000 acquisition. Total: £22,500, which is £10,000 more than under relief.
B's £50,000 profit on the assignment is not an SDLT matter: depending on B's circumstances it is taxed as income, trading profit or a capital gain. The relief only affects stamp duty, not direct tax on B's gain.
Exclusions: Post-Completion & Separated Contracts
Post-Completion Assignment
This is the most commonly misunderstood limitation. Once A completes the conveyance to B, or B substantially performs the contract (for example by taking possession or paying substantially all the price), sub-sale relief is no longer available for a later assignment. If B then sells to C, that is an entirely separate transaction: a standard residential sale where B pays SDLT on A to B and C pays SDLT on B to C. There is no mechanism to retrospectively claim sub-sale relief after B has accepted legal title.
Separated Contracts
Schedule 2A covers two kinds of pre-completion transaction: an assignment of B's rights under the original contract, and a "free-standing transfer" where B enters into a separate contract to sell to C. A separate contract can still qualify, as a qualifying sub-sale under para 16, but only if the sub-sale is performed at the same time as, and in connection with, completion of the original contract. If B completes first and sells on later, there are two ordinary transactions and two SDLT charges.
Structuring risk: Relief is denied where the arrangements have tax avoidance as a main purpose (Sch 2A para 18), and para 18(5) preserves the separate SDLT anti-avoidance rule in s75A FA2003. The general anti-abuse rule (GAAR) is a further, separate backstop. Sub-sales used to cut the SDLT, rather than for a genuine onward sale, are exactly what these rules target.
Buying through a company? The rates are different
Companies pay the 5% surcharge on homes, and a flat 17% above £500,000 unless a relief applies.
Connected Parties: The Minimum Consideration Rule
Sub-sale relief is not denied just because B and C are connected. Instead, where B and C are connected persons within the meaning of section 1122 CTA2010, or are not acting at arm's length, the minimum consideration rule in Sch 2A paras 12 to 14 applies to C: C's chargeable consideration is the highest of the actual amount, the consideration under the original contract, and the net amounts given by the parties. Connected persons include:
- Spouses and civil partners
- Relatives (siblings, ancestors, lineal descendants) and their spouses
- Business partners and their relatives
- A company controlled by B or any of the above persons
- A company under common control with B
The minimum consideration rule exists to stop connected parties driving C's taxable price down: without it, B could assign to a connected C for a nominal sum and C would be taxed on less than the land is really worth to the chain.
Whether or not B and C are connected, relief is lost if the arrangements have tax avoidance as a main purpose (para 18), and s75A FA2003 can apply where a series of transactions produces less SDLT than a direct acquisition would. Always take independent specialist advice before relying on sub-sale relief.
Timing Is Critical
The entire relief hinges on the assignment occurring before completion, or substantial performance, of the original A to B contract. "Completion" for SDLT purposes is the date on which the conveyance is executed, typically the day the legal title passes. If there is any ambiguity about whether the assignment was before or after this moment, HMRC will scrutinise the sequence of events closely.
In practice, the assignment and the sub-sale should be documented on paper with clear dates, and the assignment should be effected by a formal deed of assignment that precedes the completion date. Relying on oral agreements or informal arrangements as to timing will not suffice.
Timeline for Valid Sub-Sale Relief
Practical Applications
Property Flipping
Developers and traders who contract to buy properties and then find a buyer before completion can use sub-sale relief to avoid the SDLT double-charge that would otherwise apply. This is a legitimate commercial use of the relief.
Development Finance
A developer that has contracted to buy a site may assign the contract to a funding vehicle or joint venture company before completion. The developer can claim relief on its notional transaction and the vehicle pays SDLT on what it gives. If the two are connected, the minimum consideration rule applies to the vehicle.
New Build Off-Plan Sales
Buyers who purchase off-plan and subsequently wish to sell before completion (often years later) can assign their contract to a new buyer. If the assignment pre-dates completion and substantial performance, the original buyer can claim relief and only the incoming buyer pays SDLT.
Frequently Asked Questions
What is sub-sale relief for stamp duty?
Sub-sale relief, in Schedule 2A FA2003, lets the intermediate purchaser (B) in an A to B to C property chain claim relief from stamp duty where B assigns their contractual rights, or sub-sells, to C before completion. C pays SDLT on the consideration under the original contract plus anything C pays B for the assignment. B must claim the relief in its own land transaction return. The relief prevents double taxation in genuine commercial transactions where B never takes the conveyance.
Can I assign a property contract before completion to save SDLT?
Yes, if the conditions of Schedule 2A FA2003 are met. The assignment must happen before the original contract is completed or substantially performed, and it must not form part of tax avoidance arrangements. SDLT is not "saved" in the sense of being avoided; C will pay SDLT on the full consideration. The relief prevents B from also paying SDLT on the same property. Both parties should take independent tax advice, and the arrangement must be documented properly with both SDLT returns filed.
Does sub-sale relief work between connected parties?
Yes, but with a catch. Being connected does not bar the relief. Where B and C are connected under s1122 CTA2010, or are not acting at arm's length, the minimum consideration rule in Sch 2A paras 12 to 14 sets C's taxable consideration at no less than the original contract price (or the net amounts the parties gave, if higher). Relief is denied outright only where the arrangements have tax avoidance as a main purpose (para 18), and s75A FA2003 can also apply.
What happens if I assign after completion?
If you complete the original contract and take a conveyance of the property before assigning, sub-sale relief is not available. The assignment is treated as a second sale, meaning you have made two separate disposals. B would have paid SDLT on the A to B transaction, and C will pay SDLT on the B to C sale. There is no mechanism to retrospectively apply sub-sale relief to a transaction where completion has already occurred.
Reviewed by
Julie White
ACAStamp duty specialist since 1999Stamp Duty Land Tax Specialist
ACA and Tax Adviser with a career spanning nearly four decades, specialising in stamp duty planning and advisory work since 1999.