Lease NPV Property Tax Calculator
Estimate property transaction tax on a new lease where there is a lease premium, annual rent, or both. It separates the premium tax from the rent net present value tax so you can see why a lease can produce two different tax charges.
Estimate lease premium and rent NPV tax
For variable, linked, surrender/regrant or reviewed leases, use this as a sense check and confirm with the official calculator.
Lease details
Rent pattern for NPV
SDLT and Welsh LTT commonly use rent from the first five years and the highest first-five-year rent for later years. Scottish LBTT lease reviews can require actual-rent updates.
Special lease settings
Estimated lease transaction tax: GBP 0
Rent NPV
GBP 0
Tax on rent
GBP 0
Tax on premium
Jurisdiction
SDLT
| Component | Amount | How it was treated |
|---|
What lease NPV means
Lease NPV is the present-day value of rent due over the lease. A pound of rent payable in year ten is not treated the same as a pound payable now, so the rent is discounted using the official lease NPV method. The resulting NPV is then taxed using the rent bands for SDLT, Welsh LTT or Scottish LBTT where that jurisdiction charges tax on lease rent.
The premium is different. A premium is the lump sum paid for the lease, and it is normally taxed using the property purchase bands for the jurisdiction and property type. That is why lease tax can show both premium tax and rent NPV tax.
Where this estimate is most useful
This page is best for a new lease with a clear premium, a fixed or simple stepped rent, and a known lease term. It is especially helpful for comparing a low-premium/high-rent commercial lease with a higher-premium/lower-rent lease before asking a solicitor for the final tax figure.
It is not designed to replace official lease calculators where rent reviews, turnover rent, linked leases, surrenders and regrants, overlap relief, reverse premiums or complex mixed-use apportionments are involved.
Common lease tax traps
Ignoring the rent element
A new lease can have tax on rent NPV as well as tax on the premium, even where the premium looks modest.
Using the wrong jurisdiction
England/NI use SDLT, Wales uses LTT and Scotland uses LBTT. The lease rent bands are not identical.
Forgetting VAT on commercial rent
If rent is VAT-inclusive for the lease tax calculation, excluding VAT can understate the NPV.
Missing review returns
Scottish LBTT leases can require three-year review returns even if no additional tax is due.
Worked example: office lease
Say a business takes a 10-year office lease in England with a GBP 250,000 premium and GBP 30,000 annual rent. The premium is taxed using non-residential SDLT purchase bands. The rent is discounted year by year to produce a lease rent NPV, then the SDLT rent bands are applied to that NPV.
If the same office is in Wales or Scotland, the premium and rent bands change. That is why a lease quote from a solicitor in Cardiff or Glasgow may not match a quick SDLT-only calculation copied from an English example.
When to use the official calculator
Use the official HMRC, Welsh Revenue Authority or Revenue Scotland calculator for the final return figure, especially if there are linked leases, rent-free periods, stepped rent beyond year five, turnover rent, overlap relief, surrenders and regrants, licences, assignments or VAT questions.
Lease tax is self-assessed in practice. This page helps you understand the moving parts; it does not replace the return, the lease schedule, or professional conveyancing advice.
Lease NPV FAQs
What is lease NPV?
Is lease NPV the same as the premium?
Do residential leases pay tax on rent?
Why does my solicitor's figure differ?
How this lease NPV calculator works
Inputs used
- Jurisdiction: England/Northern Ireland SDLT, Wales LTT or Scotland LBTT.
- Lease type, premium, lease term and annual rent pattern.
- Whether rent entered excludes VAT and whether the relevant-rent premium rule should remove the 0% premium band.
Calculation method
- Calculate rent NPV by discounting each lease year at 3.5% and summing the discounted rents.
- For fixed rent, use the same rent for each year. For first-five-year input, use the entered first five years and the highest first-five-year rent for later years.
- Apply the selected jurisdiction rent NPV bands to calculate tax on rent.
- Apply the selected jurisdiction premium bands to calculate tax on the premium.
- Add premium tax and rent NPV tax, then show warnings for jurisdiction-specific limitations.
Assumptions
- The lease is a new lease with known premium and rent figures.
- The NPV discount rate is 3.5% per year.
- The stepped rent method is a simplified first-five-year method. Scottish LBTT may require actual rent updates through three-year reviews.
- VAT is added to rent only if the user selects the VAT option.
What this does not cover
- It does not calculate linked leases, overlap relief, reverse premiums, assignments, variations, surrenders and regrants, licences, partnership rules or full official return obligations.
- It does not replace the GOV.UK SDLT lease guidance, WRA calculator or Revenue Scotland lease calculator guidance.
- For ordinary freehold or simple premium-only purchases, use the Stamp Duty Calculator, Wales LTT Calculator or Scotland LBTT Calculator.
Official sources
Last verified: May 10 2026. Calculations are estimates based on the published rules and assumptions shown on this page.
- GOV.UK SDLT on leasehold sales - new lease premium and rent NPV rules, residential NPV threshold and return warnings
- HMRC SDLT manual: rent NPV - first five years, highest rent after year five and NPV calculation approach
- Welsh Revenue Authority LTT rates and bands - current Welsh premium and non-residential rent NPV bands
- WRA LTT leases technical guidance - lease NPV method, residential lease treatment, relevant rent rule and technical lease cases
- Revenue Scotland lease rates and bands - LBTT lease rent NPV and premium bands
- Revenue Scotland three-year lease reviews - LBTT review returns for leases every three years