Stamp Duty Calculator (England & Northern Ireland)
Use this calculator to estimate SDLT on residential property purchases. Enter your purchase price, choose your buyer type, and click calculate.
Rates used are for England and Northern Ireland residential SDLT bands commonly applied from April 2025 onward. This is an estimate only and not legal or tax advice.
What is stamp duty?
Stamp Duty Land Tax (SDLT) is a tax you pay when purchasing property or land in England and Northern Ireland above certain thresholds. It is charged in bands, not as a single percentage on the full price (unless a flat surcharge structure applies). That means different portions of your property price are taxed at different rates.
For most buyers, stamp duty is one of the largest upfront costs in a property purchase. Calculating it correctly helps you budget for your deposit, legal fees, survey costs, and moving expenses.
Rates used in this calculator
This page uses progressive residential SDLT bands for England and Northern Ireland. Scotland and Wales have different systems (LBTT and LTT), so this calculator does not cover those regions.
Standard residential rates
| Portion of Property Price | Rate |
|---|---|
| Up to £125,000 | 0% |
| £125,001 to £250,000 | 2% |
| £250,001 to £925,000 | 5% |
| £925,001 to £1,500,000 | 10% |
| Over £1,500,000 | 12% |
First-time buyer relief
- 0% on the first £300,000
- 5% on the portion from £300,001 to £500,000
- If the purchase price is above £500,000, first-time buyer relief does not apply and standard rates are used
Surcharges
- Additional property surcharge: +5% on top of each band rate
- Non-UK resident surcharge: +2% on top of each band rate
How to calculate stamp duty step by step
- Start with the purchase price.
- Pick the correct rate schedule (standard, first-time buyer relief, or additional property).
- Split the price into tax bands.
- Apply the relevant percentage to each band slice.
- Add surcharge percentages if applicable (for example, non-resident status).
- Sum all band taxes to get your total SDLT.
The calculator above automates this exact process and shows you a full band-by-band breakdown.
Worked examples
Example 1: Standard buyer purchasing at £400,000
- £0 to £125,000 at 0% = £0
- £125,001 to £250,000 (£125,000) at 2% = £2,500
- £250,001 to £400,000 (£150,000) at 5% = £7,500
Total SDLT = £10,000
Example 2: Additional property purchase at £300,000
Additional property means +5% surcharge added to each standard band:
- £0 to £125,000 at 5% = £6,250
- £125,001 to £250,000 at 7% = £8,750
- £250,001 to £300,000 at 10% = £5,000
Total SDLT = £20,000
Practical tips before you exchange contracts
- Budget early: Include stamp duty in your total cash required, not just your mortgage deposit.
- Check eligibility: Confirm first-time buyer status and any surcharge exemptions with your solicitor.
- Watch deadlines: Tax rules can change at fiscal events; timing may alter your payable amount.
- Get professional advice: If your case includes trusts, mixed-use property, or multiple dwellings, ask a qualified tax adviser.
Common mistakes people make
- Assuming one flat rate applies to the entire property price
- Forgetting to include the additional property surcharge
- Applying first-time buyer relief to purchases above the allowed cap
- Using rates from a different UK nation (Scotland/Wales vs England/Northern Ireland)
Final word
If you are planning to buy a home or investment property, a quick SDLT estimate can prevent expensive surprises. Use the calculator at the top of this page to test different purchase prices and buyer scenarios, then confirm the final figure with your conveyancer before completion.