Stamp duty on a lease with fixed annual rent rises
Known rent rises
Where a lease states fixed annual rent increases, HMRC’s example includes each increase in the original stamp duty NPV calculation.
- Known increases are not estimates
- No later review is needed in HMRC’s example
- RPI-linked rent is treated differently
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty on a lease with fixed annual rent rises
If your lease sets out fixed rent rises from day one, include them in the first stamp duty calculation. HMRC’s example requires no later review. Nothing about the increases is uncertain.
What this rule is about
For lease rent, stamp duty land tax is calculated using net present value, or NPV. It brings rent payable in different years into a single figure for tax purposes.
The deciding issue is whether the higher rent was known when the lease was granted. If so, include it in the original calculation.
What the official source says
HMRC’s manual illustrates the rule with a four-year lease granted on 1 April 2018. The starting rent is £100,000 a year and rises by 4% each year.
- The annual rises are known when the lease begins.
- They all fall within the first five years.
- They are not linked to the retail prices index, known as RPI.
- HMRC says each known yearly amount goes into the original NPV calculation.
What this means in practice
Where the lease sets a fixed rise, gives the exact method for calculating every increase, and leaves no amount to estimate later, it is not an uncertain rent review. Use those amounts from the start.
That distinction can matter. A wrong first calculation may mean you pay too much or too little stamp duty.
- Read the rent clause, not just the first year’s rent.
- List the rent due for every year of the lease.
- Use the known increased amounts in the original NPV calculation.
How to analyse it
Start with the lease wording. The label used for a rent clause does not decide the answer; what matters is whether the amount can be worked out at the grant date.
- Confirm the lease term and grant date.
- Identify the rent payable in each year.
- Check whether the increase is a fixed percentage or amount.
- Check whether it depends on an event, estimate or later decision.
- Check whether the clause adjusts rent in line with RPI.
Example
HMRC’s example starts at £100,000 in year 1. A 4% rise gives £104,000 in year 2, £108,160 in year 3 and £112,486 in year 4, after rounding to the nearest pound. Those four figures are used in the NPV calculation from the start.
As the rises were known, rather than estimated or dependent on a future event, HMRC says the calculation needs no review.
Why this can be difficult in practice
Some clauses look fixed but are not. For example, rent may depend on turnover, a future valuation, a choice by one party, or an event that may never happen. Those details can change how the rent is treated.
You might think every rent increase triggers a later calculation. It does not. The important point is whether the increase was already known.
- A fixed 4% yearly rise is different from a future market-rent review.
- An RPI-linked clause has its own treatment under the legislation.
- Rounding and the timing of each payment can affect the NPV figure.
Key takeaways
- Known rent rises belong in the first NPV calculation.
- HMRC’s example needs no later review.
- Check carefully whether the rent is truly fixed or uncertain.
Technical analysis
For advisers, and for anyone who wants to check the law behind this page. You do not need this section to understand the guidance above.
Legislation
- FA 2003 Schedule 5 para 3 — how to calculate rent’s net present value
- FA 2003 Schedule 17A para 7 — how variable and uncertain lease rent is treated
- FA 2003 Schedule 17A para 8 — when uncertain rent requires a later recalculation
- FA 2003 section 51 — treatment of contingent and uncertain amounts paid
Official guidance
The pages below are HMRC’s guidance. Guidance is not law. It sets out how HMRC reads the legislation, and it is not binding on you, on a tribunal or on a court. Where guidance and the legislation differ, the legislation wins. HMRC can also change or withdraw guidance, and it may not cover your facts.
Where this is not settled
- The wording of the lease must show whether an increase is fixed and known, or instead depends on a future event or calculation.
Evidence you would need
This kind of case is decided on the facts of the individual property. These are the records that usually settle it, and the ones an adviser would ask you for.
- The signed lease and any rent schedule
- The lease grant date and term
- The wording that sets each rent increase
- Evidence of whether any increase follows the retail prices index
Explore this with an AI
Readers often want to test their own situation. Copy the prompt below into ChatGPT, Claude or Gemini. It hands the model the actual legislation for this page rather than letting it answer from memory, and tells it to be explicit about what is uncertain. What comes back is information, not advice – check it against the links above.
I am researching UK Stamp Duty Land Tax (SDLT), which applies in England and Northern Ireland. MY QUESTION Stamp duty on a lease with fixed annual rent rises [Replace this with your own situation: what you are buying, the price, the dates, who the buyer is, and what you plan to do with the property.] THE LAW THIS TURNS ON - FA 2003 Schedule 5 para 3 - how to calculate rent's net present value https://www.legislation.gov.uk/ukpga/2003/14/schedule/5/paragraph/3/2025-11-17 - FA 2003 Schedule 17A para 7 - how variable and uncertain lease rent is treated https://www.legislation.gov.uk/ukpga/2003/14/schedule/17A/paragraph/7/2025-11-17 - FA 2003 Schedule 17A para 8 - when uncertain rent requires a later recalculation https://www.legislation.gov.uk/ukpga/2003/14/schedule/17A/paragraph/8/2025-11-17 - FA 2003 section 51 - treatment of contingent and uncertain amounts paid https://www.legislation.gov.uk/ukpga/2003/14/section/51/2025-11-17 HMRC's guidance page on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm13215 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. HMRC guidance is HMRC's view of the law, not the law, and does not bind a tribunal or a court. 2. Tell me what the rule actually requires, in plain English. 3. Tell me which facts decide the answer, and which facts would change it. 4. Tell me what evidence I would need to support the position. 5. Be explicit about anything unsettled or fact-sensitive. Do not guess. 6. Your training data has a cutoff and SDLT rates and reliefs change at fiscal events. Say so if you are not sure the law is current. POINTS ALREADY KNOWN TO BE UNCERTAIN ON THIS TOPIC - The wording of the lease must show whether an increase is fixed and known, or instead depends on a future event or calculation. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show Finance Act 2003 as it stood on 2025-11-17. The law may have changed since, and the rules that apply are those in force on the date of your transaction. The official guidance this page is based on is here.
This page was last updated on 1 September 2026
Useful article? You may find it helpful to read the original guidance here: Stamp duty on a lease with fixed annual rent rises
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