Key facts
- SDLT on leases is charged on the premium (at the normal slice rates) and the rent (using the NPV method).
- The NPV nil-rate threshold for non-residential leases is £150,000; for residential leases it is £125,000.
- Rent NPV above the threshold is taxed at 1% (and 2% above £5,000,000 for non-residential).
- The NPV discounts future rent at a rate of 3.5% per year.
- Short leases (less than 7 years) may not require an SDLT return unless the premium exceeds the relevant threshold.
Two Components of SDLT on Leases
When a new lease is granted, SDLT may be payable on two separate elements:[1]
| Element | How SDLT Is Calculated |
|---|---|
| Premium (lump sum paid for the lease) | Taxed at the standard slice rates (residential or commercial as appropriate) |
| Rent (periodic payments over the lease term) | Taxed on the NPV of the total rent payable |
Both elements are calculated separately and the resulting SDLT amounts are added together.
Net Present Value (NPV) Explained
The NPV calculation converts the total rent payable over the entire lease term into a single present-day value by applying a discount rate of 3.5% per year. This reflects the time value of money — rent paid 10 years from now is worth less in today’s terms than rent paid next year.[3]
The formula for each year’s discounted rent is:
Discounted rent for year n = Annual rent ÷ (1.035)n
The NPV is the sum of all discounted annual rents over the lease term.
SDLT Rates on Rent NPV
Non-Residential Leases
| NPV Band | Rate |
|---|---|
| Up to £150,000 | 0% |
| £150,001 – £5,000,000 | 1% |
| Over £5,000,000 | 2% |
Residential Leases
| NPV Band | Rate |
|---|---|
| Up to £125,000 | 0% |
| Over £125,000 | 1% |
Worked Example: Commercial Lease
A business takes a 10-year commercial lease with an annual rent of £50,000 and a premium of £25,000.
Step 1: SDLT on the Premium
£25,000 is below the £150,000 nil-rate threshold for non-residential property. SDLT on premium = £0.
Step 2: Calculate the NPV of the Rent
| Year | Rent | Discount Factor (1.035n) | Discounted Rent |
|---|---|---|---|
| 1 | £50,000 | 1.035 | £48,309 |
| 2 | £50,000 | 1.071 | £46,676 |
| 3 | £50,000 | 1.109 | £45,095 |
| 4 | £50,000 | 1.148 | £43,564 |
| 5 | £50,000 | 1.188 | £42,081 |
| 6–10 | £50,000/yr | Various | £188,461 |
| Total NPV | £414,186 | ||
Step 3: SDLT on the Rent NPV
| NPV Band | Amount | Rate | SDLT |
|---|---|---|---|
| Up to £150,000 | £150,000 | 0% | £0 |
| £150,001 – £414,186 | £264,186 | 1% | £2,642 |
| Total SDLT on rent | £2,642 | ||
Total SDLT = £0 (premium) + £2,642 (rent NPV) = £2,642
Lease Assignments
When an existing lease is assigned (transferred from one tenant to another), the transaction is treated as a purchase of the leasehold interest. SDLT is charged on the consideration given for the assignment at the standard slice rates — not on the NPV of future rent.[2]
Rent Reviews and Abnormal Rent Increases
If the rent increases during the lease term, a further SDLT return may be required:[2]
- An increase that was provided for in the lease (e.g. a fixed escalation clause) should have been included in the original NPV calculation
- An increase from a rent review that was not “reasonably foreseeable” triggers a recalculation and a further return
- The additional SDLT is the difference between the NPV calculated with the new rent and the NPV originally returned
Tip: HMRC provides an online NPV calculator to help with lease SDLT calculations. For complex leases (e.g. turnover rent, stepped rent, break clauses), seek professional advice — the NPV calculation can be significantly affected by these terms.
Frequently Asked Questions
What is net present value (NPV)?
NPV is a way of expressing the total value of future rent payments as a single lump sum in today’s money. Because £1 received in the future is worth less than £1 today, future rent is “discounted” at 3.5% per year. The NPV is the sum of all discounted rent payments over the lease term.
Is SDLT charged on every lease?
No. SDLT is only charged on new leases where the premium and/or the NPV of the rent exceed the relevant nil-rate threshold. Assigning (transferring) an existing lease is treated as a purchase, not a new lease, and is taxed on the consideration paid for the assignment.
Who pays SDLT on a lease?
The tenant (lessee) is the purchaser for SDLT purposes and is liable for any SDLT on the grant of a new lease. The landlord has no SDLT liability on granting a lease.
What happens if my rent changes during the lease?
If the rent increases (e.g. at a rent review), you may need to submit a further SDLT return to account for the higher rent. This applies if the increase was not “reasonably foreseeable” at the time the lease was granted.
Further Reading
- Commercial SDLT Rates — rates for non-residential property purchases
- VAT and SDLT Interaction — when VAT on rent affects the SDLT calculation
- Mixed-Use Property & SDLT — rates when a lease covers mixed-use premises
- SDLT Glossary — definitions of NPV, premium, assignment, and more
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Sources
- Stamp Duty Land Tax: leases — GOV.UK
- SDLTM14000 – SDLT and leases — HMRC
- Stamp Duty Land Tax: calculating the NPV of rent — GOV.UK