Lease NPV SDLT Calculator
Calculate stamp duty on commercial leases using the HMRC Net Present Value method with the 3.5% temporal discount rate.
Lease Details
Rent NPV
£415,830
SDLT on Rent
£2,658
SDLT on Premium
£0
Total SDLT
£2,658
Rent NPV SDLT Breakdown
| Band | Rate | Tax |
|---|---|---|
| £0 – £150,000 | 0% | £0 |
| £150,000 – £415,830 | 1% | £2,658 |
How NPV Works for SDLT
SDLT on leases is calculated on the Net Present Value of total rent payable over the lease term. HMRC uses a fixed temporal discount rate of 3.5% per annum.
NPV = Σ (annual_rent ÷ 1.035year) for each year 1 to 10
The NPV is then taxed using the lease rent SDLT rates. If a lease premium (upfront payment) is also made, that is taxed separately using the standard commercial SDLT rates.
Year-by-Year NPV Breakdown
| Year | Annual Rent | Discount Factor | Present Value |
|---|---|---|---|
| 1 | £50,000 | 0.9662 | £48,309 |
| 2 | £50,000 | 0.9335 | £46,676 |
| 3 | £50,000 | 0.9019 | £45,097 |
| 4 | £50,000 | 0.8714 | £43,572 |
| 5 | £50,000 | 0.8420 | £42,099 |
| 6 | £50,000 | 0.8135 | £40,675 |
| 7 | £50,000 | 0.7860 | £39,300 |
| 8 | £50,000 | 0.7594 | £37,971 |
| 9 | £50,000 | 0.7337 | £36,687 |
| 10 | £50,000 | 0.7089 | £35,446 |
| Total NPV | £415,830 | ||
SDLT Rate Tables
Rent NPV Rates
| Up to £150,000 | 0% |
| £150,001 – £5,000,000 | 1% |
| Over £5,000,000 | 2% |
Premium Rates (Commercial)
| Up to £150,000 | 0% |
| £150,001 – £250,000 | 2% |
| Over £250,000 | 5% |
When This Applies
The NPV calculation applies primarily to commercial leases. Residential tenancies rarely trigger SDLT because the rent NPV threshold of £150,000 is seldom reached at typical residential rent levels.
For more on commercial lease SDLT, see our Commercial Lease SDLT Guide.
Emma Richardson, MRICS
Chartered Surveyor & Property Tax Specialist
Emma Richardson is a RICS-qualified Chartered Surveyor with over 12 years of experience in UK property taxation. She founded Calculate My Stamp Duty UK to help buyers understand the complex world of property transaction taxes.