Understanding Leases for an Indefinite Term: Definition and Initial Treatment

SDLT and Leases with No Fixed End Date

A lease without a set end date can still be caught by Stamp Duty Land Tax. For SDLT, you must work out whether the arrangement is truly a lease for an indefinite term and then apply the special rules for that type of lease, rather than assuming the lack of a fixed term means SDLT does not apply.

• SDLT looks at the length of a lease when working out the tax, so an indefinite term needs special treatment.
• A lease with no fixed expiry date is not ignored for SDLT; there are specific rules for leases of indefinite duration.
• The first step is to classify the arrangement properly and decide whether it is really a lease, rather than a licence or another form of occupation.
• Careful drafting review is important, as what looks indefinite may actually be a fixed-term lease, a periodic tenancy, or a tenancy at will.
• The SDLT position at the start of the lease may not be the end of the matter, because later events can affect how the lease is treated.
• Where wording is unclear or informal, the legal effect of the document matters more than the label used by the parties.

Scroll down for the full analysis.

SDLT and leases for an indefinite term

This page explains how Stamp Duty Land Tax looks at a lease that does not have a fixed end date. These leases can be awkward because SDLT normally depends in part on the length of the lease. If the term is indefinite, the tax rules need a way to treat it at the start and, in some cases, later on.

What this rule is about

For SDLT, the term of a lease matters. It affects how the lease is valued and therefore how the tax charge is worked out. Most leases state a clear period, such as 5 years or 99 years. Some do not. Instead, they continue for an uncertain period, or until something happens.

The material here is concerned with leases for an indefinite term. The key issue is how SDLT deals with a lease when, at the outset, no fixed lease length can be identified.

What the official source says

The source material identifies a specific SDLT category: leases for an indefinite term. It also indicates that there are separate rules on:

• what counts as a lease for an indefinite term, and
• how such a lease is treated initially for SDLT purposes.

Although the extract provided is only a contents page, its structure shows that SDLT does not ignore an indefinite lease. Instead, it applies a defined treatment to it. In other words, the absence of a fixed expiry date does not mean the lease falls outside the SDLT lease rules.

What this means in practice

If a lease has no fixed term, you still need to decide how SDLT applies when the lease is granted. The starting point is to identify whether the arrangement is truly a lease for an indefinite term, rather than a fixed-term lease with unusual drafting.

This matters because:

• the lease term is relevant to the SDLT calculation, especially for rent-based charges;
• the initial SDLT treatment may not be the end of the story if the lease later continues in a way the legislation treats differently; and
• conveyancers and taxpayers need to classify the lease correctly at the start, rather than assuming that an uncertain term means no SDLT issue arises.

In practical terms, the question is not simply “Is there a lease?” but also “What sort of lease term does the legislation treat this as?”

How to analyse it

A sensible way to approach an indefinite-term lease for SDLT is:

• Identify the legal nature of the arrangement. Is it a lease, tenancy, or licence? SDLT lease rules only apply if the arrangement is in substance a lease.
• Check whether the term is fixed or indefinite. If the lease does not state a definite end date, or continues until brought to an end in some other way, that may point to an indefinite term.
• Separate the initial SDLT treatment from any later consequences. The source material suggests that initial treatment is dealt with specifically, which usually means the position at grant is analysed first.
• Review the drafting carefully. Clauses dealing with continuation, break rights, periodic occupation, or automatic renewal may affect whether the lease is fixed-term, periodic, or indefinite.
• Consider the wider SDLT framework. A lease with uncertain duration may still need a return and tax calculation based on the statutory treatment applied to that kind of lease.

Where the wording is unusual, the legal effect of the document matters more than labels used by the parties.

Example

Illustration: a tenant is granted the right to occupy premises from a stated date, paying rent monthly, but the document does not give a fixed expiry date. Instead, it continues until ended under the agreement. That raises the question whether the arrangement is a lease for an indefinite term. If it is, SDLT must be worked out using the rules that apply to indefinite leases rather than by pretending there is no lease term issue.

Why this can be difficult in practice

The main difficulty is classification. Documents may be drafted informally or use property language inconsistently. A lease may appear indefinite, but on closer reading it may actually be:

• a fixed-term lease with continuation provisions;
• a periodic tenancy;
• a tenancy at will or other short-term occupation arrangement; or
• something that is not a lease at all.

That distinction matters because SDLT consequences can differ significantly depending on the legal character of the arrangement.

Another difficulty is that the source extract provided here is only a contents page. It signals that HMRC has a definition section and an initial-treatment section, but it does not itself set out the detailed rule. So the safe conclusion from this extract is limited: SDLT contains specific rules for leases of indefinite duration, and those leases need to be analysed under those rules rather than treated as outside the regime.

Key takeaways

• A lease with no fixed end date can still fall within the SDLT lease rules.
• The first step is to decide whether the arrangement is legally a lease for an indefinite term.
• The SDLT treatment depends on the statutory rules for indefinite leases, so careful classification of the document is essential.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Understanding Leases for an Indefinite Term: Definition and Initial Treatment

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