Backdated Lease Rules: SDLT Treatment and Overlap Relief Explained

SDLT on a Backdated Lease After a Tenant Holds Over

Where a tenant stays in a property after the old lease has ended and a new lease is later granted with a start date backdated to that earlier point, a special SDLT rule may apply. If the legal conditions are met, SDLT treats the new lease as starting on the date stated in the new lease rather than the date it was actually granted, and rent for the gap period may qualify for relief to help avoid double charging.

• The rule applies only in specific cases, including where the original lease was within SDLT, the tenant remained in occupation after expiry, and the new lease covers the same or substantially the same premises.
• The new lease must state that it begins on, or immediately after, the old lease’s contractual end date, and it must have been granted on or after 19 July 2006.
• If the conditions are satisfied, the lease term for SDLT is measured from the earlier date written into the new lease, not the later grant date.
• Rent paid for the period between the old lease ending and the new lease being granted may qualify for overlap-style relief, which can reduce the risk of taxing the same rental period twice.
• If the conditions are not met, the holding over rent will often be treated as rent under the old lease, although SDLT can still arise in some cases if changes, such as a rent increase, amount to a lease variation.
• In practice, the main difficulty is checking the facts carefully, especially whether the premises are substantially the same and how rent paid during the holding over period should be legally characterised.

Scroll down for the full analysis.

SDLT on a backdated lease granted after a tenant has held over

This page explains a narrow but important SDLT rule for lease renewals. It applies where a tenant stays in occupation after the old lease should have ended, and the parties later grant a new lease which is expressed to start from that earlier date. The main point is that, in certain cases, SDLT treats the new lease term as starting from the date written into the lease, not from the date the lease was actually granted. That can affect both the term used for SDLT and the rent that is taxed.

What this rule is about

Sometimes a lease expires under its original terms, but the tenant does not leave. The tenant simply remains in occupation while the parties negotiate a renewal. Later, they sign a new lease and state that it starts on or just after the date when the old lease was meant to end.

That raises a timing problem for SDLT. Should the new lease be treated as starting when it was actually granted, or from the earlier date stated in the document? That question matters because SDLT on leases depends heavily on the term of the lease and the rent payable over that term.

The HMRC material says that, where specific conditions are met, a special statutory rule applies. That rule overrides the usual approach that might otherwise apply to backdated leases.

What the official source says

HMRC says that paragraph 9A of Schedule 17A to Finance Act 2003 applies if all of the following are true:

• the original grant of the lease was within SDLT, not stamp duty;
• the tenant stayed in occupation after the date the old lease would have ended under its original terms;
• the tenant was then granted a new lease of the same or substantially the same premises;
• the new lease says that its term begins on, or immediately after, that contractual termination date; and
• the new lease was granted on or after 19 July 2006.

If those conditions are met, SDLT treats the new lease term as beginning on the date stated in the new lease. In other words, the lease is treated as starting from that earlier expressed date, even though the actual grant happened later.

HMRC also says that rent relating to the period between:

• the old lease’s contractual termination date, and
• the actual date the new lease was granted

can qualify for relief in the same way as overlap relief, provided the statutory conditions are met.

The manual contrasts this with leases that do not qualify for this rule. In those cases, HMRC says there is unlikely to be a double SDLT charge because rent paid during the holding over period will usually be consideration for occupation under the old lease. HMRC adds that in some other cases SDLT may arise if an increase in rent amounts to a variation under paragraph 13 of Schedule 17A.

What this means in practice

If the rule applies, you do not ignore the backdating clause for SDLT. The new lease is treated as having started on the earlier date written into it. That affects the SDLT analysis of the lease term.

However, the legislation also recognises that there may otherwise be an overlap in the rent charged to SDLT. During the period after the old lease should have ended but before the new lease was actually granted, the tenant may already have been paying rent while holding over. HMRC says rent for that period can qualify for relief on the same basis as overlap relief.

The practical effect is that the rule is designed to deal with a common renewal situation without unfairly charging the same rental period twice.

This is particularly relevant where:

• the lease renewal was agreed late;
• the tenant stayed in occupation continuously;
• the replacement lease is intended to run from the old expiry date; and
• the premises are the same, or substantially the same, as before.

It is also important to notice what the rule does not say. It does not mean every backdated lease after holding over is automatically taxed in the same way. The statutory conditions must be checked carefully.

How to analyse it

A sensible way to approach the issue is to ask these questions in order:

• Was the original lease within SDLT rather than the old stamp duty rules?
• Did the tenant remain in occupation after the old lease’s contractual end date?
• Was a new lease later granted to that tenant?
• Is the new lease over the same or substantially the same premises?
• Does the new lease say that its term begins on, or immediately after, the old lease’s contractual termination date?
• Was the new lease granted on or after 19 July 2006?

If the answer to all of those questions is yes, HMRC’s stated view is that the special rule in paragraph 9A applies. The term of the new lease is then treated as beginning on the date expressed in the new lease.

You should then consider the rent for the period between the old contractual expiry date and the actual grant date of the new lease. HMRC says that rent for that period may qualify for overlap-style relief.

If one of the conditions is missing, the special rule may not apply. In that case, the treatment of rent during the holding over period may depend on whether that rent is properly treated as consideration under the old lease, or whether later changes amount to a variation that creates an SDLT charge under the variation rules.

Example

Illustration only: a tenant’s lease is due to end on 31 March. The tenant stays in occupation after that date while renewal terms are negotiated. On 1 September, the parties grant a new lease of the same premises. The new lease says its term starts on 1 April, the day after the old lease’s contractual expiry date.

If the statutory conditions are met, SDLT treats the new lease term as beginning on 1 April, not 1 September. But rent attributable to the period from 1 April to 1 September may qualify for overlap-style relief, so that period is not unfairly taxed twice.

Why this can be difficult in practice

The main difficulty is often not the rule itself, but whether the facts fit it.

For example, the phrase “same or substantially the same premises” can require judgement. A straightforward renewal of the same unit is usually easier. A renewal involving added space, removed space, reconfiguration, or a different demise may be harder to classify.

Another practical difficulty is identifying what rent relates to the holding over period and under what legal basis it was paid. HMRC says that in many non-qualifying cases, rent during the holding over period will usually be consideration for occupation under the old lease. But that will depend on the facts and the legal effect of the parties’ arrangements.

There can also be an issue where rent changes before the new lease is formally granted. HMRC notes that a charge may arise if an increase in rent amounts to a variation under paragraph 13. That means the analysis may need to consider not just the eventual renewal lease, but also whether anything done during the holding over period changed the old lease in a way that has SDLT consequences.

Finally, this area sits against the background of wider SDLT rules on lease terms, variations, and overlap relief. The answer may therefore depend on how those connected rules apply to the facts, not just on the wording of the renewal lease itself.

Key takeaways

• Where a tenant holds over and later receives a backdated renewal lease, SDLT may treat the new lease term as starting from the earlier date stated in the lease.
• This special treatment only applies if the statutory conditions are met, including continuous occupation after expiry and a new lease of the same or substantially the same premises.
• Rent for the gap between the old lease’s contractual end date and the actual grant of the new lease may qualify for overlap-style relief, helping prevent double SDLT charging.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Backdated Lease Rules: SDLT Treatment and Overlap Relief Explained

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