Stamp Duty Calculator (England & Northern Ireland)
Estimate SDLT when buying property through a limited company. For residential purchases, this calculator uses the common higher-rate company treatment (standard residential bands plus 3% surcharge) unless you select the flat 15% rule.
Only relevant in specific cases (for example, certain high-value residential acquisitions without relief).
How this stamp duty calculator helps limited companies
Buying property through a company can be tax efficient in the right circumstances, but purchase taxes are often higher than people expect. This calculator gives you a quick estimate of the Stamp Duty Land Tax (SDLT) due for company purchases in England and Northern Ireland, so you can model deals faster and make better acquisition decisions.
It is especially useful for property investors comparing multiple opportunities and wanting a fast way to estimate total acquisition costs before legal work begins.
What rates are included?
1) Residential purchases by a limited company
For most residential property bought by a limited company, higher rates apply. This calculator uses a progressive banded method based on:
- 3% on the first £125,000
- 5% on £125,001 to £250,000
- 8% on £250,001 to £925,000
- 13% on £925,001 to £1,500,000
- 15% above £1,500,000
These rates reflect common company treatment for additional residential property and are applied progressively (not as one single rate on the whole price).
2) Non-residential or mixed-use purchases
Where the purchase is genuinely non-residential or mixed-use, different SDLT bands apply:
- 0% up to £150,000
- 2% on £150,001 to £250,000
- 5% above £250,000
3) Flat 15% company rate option
The calculator also includes an optional flat 15% mode for situations where the special company rate can apply to the full residential purchase price. This is highly fact-specific and subject to reliefs and anti-avoidance rules, so treat this as a scenario tool rather than a final filing figure.
Example calculations
Example A: Residential buy-to-let at £300,000
Using the higher company residential bands:
- £125,000 × 3% = £3,750
- £125,000 × 5% = £6,250
- £50,000 × 8% = £4,000
Total SDLT: £14,000
Example B: Mixed-use property at £300,000
- £150,000 × 0% = £0
- £100,000 × 2% = £2,000
- £50,000 × 5% = £2,500
Total SDLT: £4,500
Costs to include in your acquisition budget
Stamp duty is only one part of your purchase stack. A realistic company purchase budget should also include:
- Solicitor and conveyancing fees
- Searches and Land Registry fees
- Survey and valuation costs
- Mortgage arrangement and broker fees (if financed)
- Refurbishment and compliance works
Underestimating these can quickly distort your true yield and cash-on-cash return.
Important notes and limitations
- This calculator is designed for England and Northern Ireland SDLT only.
- Scotland (LBTT) and Wales (LTT) use different systems and rates.
- Company structures, connected parties, relief claims, and property classification can materially change the tax outcome.
- Rules can change with government policy updates.
Practical next step before you exchange
Use this calculator for early deal screening, then confirm the final SDLT position with your solicitor or tax adviser before exchange and completion. A short professional check can prevent expensive filing errors and penalties.