Commercial stamp duty calculator
Enter the price, or the premium and rent for a new lease, to estimate non-residential SDLT on commercial property, land or mixed-use buildings. The calculator is coming soon.
Reviewed by David Sampson, Founder & Director · Created 20 October 2026 · Last reviewed 20 October 2026
How a commercial stamp duty calculator works
A commercial stamp duty calculator applies the non-residential SDLT bands to the price of a commercial property, a piece of land or a mixed-use building, slice by slice. For a new lease it adds the tax on any premium to the tax on the net present value of the rent over the lease term.
The non-residential bands are zero up to £150,000, 2% from £150,001 to £250,000 and 5% above £250,000 for purchases and premiums (GOV.UK, accessed 20 Oct 2026). The surcharges for additional homes and non-resident buyers do not apply.
Stamp duty on commercial leases
For a new non-residential lease, stamp duty can be due on both the premium and the rent. The rent element is based on the net present value of the rent payable over the term, discounted using a rate set by HMRC, and is then taxed at its own bands once it passes the threshold for leases.
The rent bands are zero up to £150,000, 1% from £150,001 to £5 million and 2% above that (GOV.UK, accessed 20 Oct 2026). Leases with variable rent may need further returns later.
Using the results
The result is an estimate based on the figures entered. The final tax depends on the exact price, the effective date, any reliefs and how the transaction is structured, and a conveyancer confirms it on the SDLT return. How the rates, leases and returns work is explained in the guide to commercial stamp duty.
Funding the purchase, including deposits and lender checks, is a separate step.
Frequently asked questions
What does a commercial stamp duty calculator show?
An estimate of non-residential SDLT on a price, or on a lease premium and rent.
Does it work for mixed-use property?
Yes. Mixed-use property is taxed at the non-residential rates.
Does it work for land?
Yes, for land that is not part of a home's garden or grounds.
Does it include the non-resident surcharge?
No. The surcharge does not apply to non-residential property.
Is the result final?
No. It is an estimate, and the conveyancer confirms the tax on the return.
Does it cover Scotland and Wales?
No. Scotland and Wales have their own property taxes.
Important: Your home may be repossessed if you do not keep up repayments on your mortgage. Information on this page is for general guidance only and does not constitute financial advice.Always verify details directly and seek independent advice before making financial decisions.