Understanding SDLT Implications for Variable Rent and Five-Year Lease Reviews

SDLT treatment of five-year rent reviews on leases

A narrow SDLT rule can allow a first rent review to be ignored when calculating lease rent and net present value if the review is to an amount that cannot be known in advance, such as open market rent, and it falls effectively in the last three months of the fifth year of the SDLT lease term. This helps avoid having to estimate future rent, but the timing conditions and the correct SDLT start date must be checked carefully.

• The rule only applies if the review is the first or only rent review under the lease.
• The reviewed rent must be genuinely unascertainable in advance, such as market rent, rather than a fixed increase or a formula that can already be calculated.
• The review must be linked to a specified date that falls within the three months before the start of the lease term, or in practice HMRC may accept any review in the last three months of year 5.
• If the rule applies, the review is treated as happening after the end of year 5, so it is ignored for SDLT rent calculations and NPV.
• The SDLT start date may differ from the lease’s stated start date, especially where there is an agreement for lease or substantial performance creating an earlier notional lease.
• A review that looks like a five-year review commercially may not qualify if, for SDLT purposes, the lease term started earlier than expected.

Scroll down for the full analysis.

SDLT and five-year rent reviews: when a variable rent review can be ignored

This page explains a narrow but important SDLT rule for leases with a first rent review around the fifth year. In some cases, a rent review to an amount that cannot be known in advance, such as open market rent, is treated as if it happens after the first five years of the lease. If that rule applies, the review is ignored when working out the rent for SDLT purposes and calculating the lease’s net present value.

What this rule is about

SDLT on leases is partly based on the rent payable over the term. Where rent is variable or uncertain, special rules decide what figure should be used in the SDLT calculation. A common problem arises where a lease starts on one date for property law purposes, but for SDLT the lease term is treated as starting on the date of grant. That can make a “fifth anniversary” rent review fall just inside the first five years for SDLT purposes, even though commercially it is really a five-year review.

Paragraph 7A of Schedule 17A to Finance Act 2003 deals with this. It prevents some first five-year reviews from affecting the SDLT calculation where the review is very close to the end of the first five years and meets specific conditions.

What the official source says

According to HMRC’s manual, a rent review is treated as falling after the end of the fifth year of the lease term, and so is disregarded for SDLT purposes, if all of the following apply:

• it is the first or only rent review;
• the reviewed rent is unascertainable in advance, for example a review to market rent;
• the review date is five years after a specified date; and
• that specified date falls within the three months before the beginning of the lease term.

HMRC says the practical result is that the first rent review during the lease term is ignored if it falls after 4 years and 9 months from the start of the lease term.

The manual also notes an important technical point. The legislation refers to a “specified date”, so strictly this rule applies where the lease terms themselves provide for a five-year review by reference to that date. HMRC nevertheless says that in practice it accepts the rule applies to any review falling within the last three months of the fifth year of the lease.

What this means in practice

If the rule applies, you do not estimate the reviewed rent for SDLT purposes. Instead, the SDLT rent calculation ignores that first review and uses the rent otherwise payable under the lease.

This matters because a market rent review is often impossible to quantify accurately at the start. If the review had to be brought into the SDLT calculation, the tenant would usually need to estimate the rent for years 6 onwards. Paragraph 7A removes that need in the cases it covers.

In HMRC’s example, a lease is granted on 11 July 2015 for a 10-year term running from 25 June 2015, at £35,000 a year, with a market rent review on the fifth anniversary of that start date. For SDLT, the lease term starts on the date of grant, 11 July 2015. That would normally mean the review on 25 June 2020 falls within the first five years for SDLT purposes, so an estimate might be needed. But because the review is the first review, is to market rent, and the stated start date is within three months before grant, the review is treated as occurring after the end of year 5. HMRC therefore calculates the NPV using £35,000 for the whole term.

How to analyse it

A sensible way to analyse the point is to ask these questions in order:

• Is this the first review, or the only review, under the lease?
• Is the reviewed amount genuinely unascertainable in advance, such as open market rent, rather than a fixed stepped increase or a formula that can already be worked out?
• What date does the lease use as the anchor for the review? Is the review set for five years after a specified date in the lease?
• Does that specified date fall within the three months before the beginning of the lease term?
• Looking at the SDLT lease term, does the review fall in the last three months of the fifth year, in other words after 4 years and 9 months from the SDLT start date?
• Is there an agreement for lease or substantial performance that creates a notional lease, changing the relevant start date for SDLT?

The last point is especially important. For SDLT, the relevant lease term may not be the date the parties informally think of as the start. If there has been substantial performance of an agreement for lease, SDLT may treat a notional lease as having been granted earlier. That can stop the paragraph 7A rule from applying.

Example

Illustration: a lease is granted on 1 October, but it is expressed to run from the previous quarter day, 29 September. The first rent review is to open market rent on the fifth anniversary of 29 September. Because that stated date is within three months before the SDLT start date and the review is effectively in the last three months of the fifth SDLT year, the review may be ignored under the rule, assuming it is the first or only review and the rent is unascertainable in advance.

By contrast, if the lease is granted on 26 September but is expressed to start on 24 June, that earlier date is more than three months before grant. HMRC’s manual says the rule does not apply.

Why this can be difficult in practice

The main difficulty is identifying the correct “start” date for SDLT. The lease may say it runs from an earlier date, but SDLT may treat the term as starting on grant, or earlier still if there was substantial performance of an agreement for lease.

A second difficulty is the difference between the wording of the legislation and HMRC’s administrative approach. The legislation refers to a review date that is five years after a “specified date”. HMRC says it will, in practice, accept the rule for any review in the last three months of the fifth year. That is helpful, but it is not quite the same as saying the legislation always clearly covers every such case.

A third difficulty is deciding whether the reviewed rent is truly unascertainable in advance. A review to market rent will usually qualify. A fixed increase or a rent formula that can already be calculated may not.

There can also be complications where an agreement for lease is substantially performed before the formal lease is granted. HMRC’s example shows that if a notional lease is treated as starting earlier, a later formal grant does not restart the five-year clock. In that situation, a review that looks like a five-year review by reference to the formal lease may in fact occur only three years after the relevant SDLT start date, so the paragraph 7A rule does not apply.

Key takeaways

• A first or only review to an unascertainable rent, such as market rent, can sometimes be ignored for SDLT if it falls effectively in the last three months of year 5.
• The three-month timing condition is critical, and the SDLT start date may differ from the lease’s commercial start date.
• Agreements for lease and substantial performance can change the analysis by creating an earlier notional lease for SDLT purposes.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Understanding SDLT Implications for Variable Rent and Five-Year Lease Reviews

View all HMRC SDLT Guidance Pages Here