Commercial Property SDLT Calculator UK 2026
Non-residential (commercial) SDLT rates are: 0% on the first £150,000, 2% on £150,001–£250,000 and 5% above £250,000. These rates are typically lower than residential rates and, critically, the 5% additional property surcharge does NOT apply to commercial purchases. Leases attract SDLT on both the premium and the net present value of the rent.
Commercial SDLT = (0% × first £150,000) + (2% × £150,001–£250,000) + (5% × amount above £250,000)
Stamp Duty Land Tax on commercial and non-residential property works differently from residential SDLT. The rates are generally lower, and the 5% additional property surcharge that applies to buy-to-let and second homes does not apply. This makes commercial property an attractive option for certain investors.
Our commercial property SDLT calculator handles freehold purchases, lease premium calculations and mixed-use properties. Whether you’re buying a shop, office, warehouse, or a property with both commercial and residential elements, you’ll get an accurate 2026 tax calculation.
What This Means
Your calculated SDLT is based on non-residential rates. If your property is mixed-use (containing both residential and commercial elements, such as a flat above a shop), non-residential rates apply to the entire purchase, which can result in significant savings compared to residential rates. For lease transactions, SDLT is calculated on both the premium (lump sum) and the net present value (NPV) of the rent.
Non-Residential SDLT Rates (2026)
The following SDLT rates apply to non-residential and mixed-use property purchases in England and Northern Ireland:
| Purchase Price Band | Non-Residential Rate | Residential Rate (for comparison) |
|---|---|---|
| Up to £150,000 | 0% | 0% (up to £250,000) |
| £150,001–£250,000 | 2% | 0% (still in nil band) |
| Over £250,000 | 5% | 5% (£250,001–£925,000) |
Key advantages of commercial SDLT rates:
- No additional property surcharge (saving 5% compared to BTL residential purchases)
- Lower nil-rate band (£150,000 vs £250,000) but maximum rate of only 5% compared to up to 17% for additional residential properties
- Mixed-use properties qualify for non-residential rates on the entire purchase
Commercial SDLT Worked Examples
See how commercial SDLT compares to residential rates at different purchase prices:
| Purchase Price | Commercial SDLT | Standard Residential SDLT | BTL Residential SDLT |
|---|---|---|---|
| £150,000 | £0 | £0 | £7,500 |
| £250,000 | £2,000 | £0 | £12,500 |
| £300,000 | £4,500 | £2,500 | £17,500 |
| £500,000 | £14,500 | £12,500 | £37,500 |
| £1,000,000 | £39,500 | £41,250 | £91,250 |
| £2,000,000 | £89,500 | £151,250 | £251,250 |
Commercial SDLT is notably lower than BTL residential SDLT at every price point due to the absence of the 5% surcharge. For very high-value properties, commercial rates are also lower than standard residential rates because the maximum commercial rate is 5% vs 12% for residential.
SDLT on Commercial Leases
When taking a new commercial lease, SDLT may be payable on two elements:
- Lease premium: A one-off payment to the landlord (similar to a purchase price). SDLT is calculated using the non-residential rates above.
- Net Present Value (NPV) of rent: The total rent over the lease term, discounted to present value using the temporal discount rate (currently 3.5%). SDLT is payable at 1% on the NPV above £150,000 and 2% above £5,000,000.
| NPV of Rent Band | SDLT Rate |
|---|---|
| Up to £150,000 | 0% |
| £150,001–£5,000,000 | 1% |
| Over £5,000,000 | 2% |
Example: A 10-year lease at £50,000 per annum with no premium. The NPV of the rent (at 3.5% discount rate) is approximately £418,000. SDLT on the NPV = 0% on first £150,000 + 1% on £268,000 = £2,680. No SDLT on the premium as there isn’t one.
Mixed-Use Properties: A Valuable Strategy
Mixed-use properties (containing both residential and commercial elements) are taxed at non-residential SDLT rates. This can result in significant tax savings compared to purely residential rates:
| Purchase Price | Residential SDLT | BTL Residential SDLT | Mixed-Use SDLT | Saving vs BTL |
|---|---|---|---|---|
| £300,000 | £2,500 | £17,500 | £4,500 | £13,000 |
| £500,000 | £12,500 | £37,500 | £14,500 | £23,000 |
| £750,000 | £27,500 | £65,000 | £27,000 | £38,000 |
Common mixed-use examples include:
- Flat above a shop or restaurant
- House with a separate commercial unit (e.g., office, workshop)
- Agricultural property with a farmhouse
- Property with commercial woodland or land over 0.5 hectares
Important: HMRC closely scrutinises mixed-use claims. The commercial element must be genuine and in commercial use (or intended for commercial use). Simply having a large garden or unused outbuilding does not qualify. Seek professional advice before claiming mixed-use status.
Tax Planning Considerations
Commercial property SDLT offers several legitimate planning opportunities:
- Mixed-use strategy: Buying a property with genuine commercial use attracts lower SDLT rates. For example, a flat above a shop at £500,000 pays £14,500 in SDLT (non-residential rates) vs £37,500 at BTL residential rates.
- Six or more dwellings: Purchasing 6+ residential units in a single transaction used to qualify for non-residential rates (under the now-abolished Multiple Dwellings Relief). Since June 2024, this relief has been withdrawn, but purchases of 6+ dwellings in a single transaction may still qualify for non-residential rates under the general SDLT rules.
- Limited company purchases: While the BTL surcharge applies equally to company and personal purchases of residential property, commercial property purchases avoid the surcharge entirely regardless of the buyer type.
- Lease vs purchase: For some businesses, leasing may be more SDLT-efficient than purchasing outright, especially for shorter-term requirements. The NPV calculation can result in lower SDLT than a freehold purchase at the equivalent value.
Disclaimer: Tax planning should always be done with professional advice. HMRC has the power to challenge arrangements it considers to be artificial or tax-avoidant. Always ensure your approach is fully compliant with current legislation.