HMRC SDLT Calculator (England & Northern Ireland)
Use this quick tool to estimate your Stamp Duty Land Tax (SDLT) on residential purchases.
Educational estimate only. This calculator uses residential SDLT bands and common surcharges for England and Northern Ireland, with first-time buyer rules from 1 April 2025 onward.
What is SDLT?
Stamp Duty Land Tax (SDLT) is a tax you may have to pay when buying property or land in England and Northern Ireland. The amount depends on the purchase price, buyer status, and whether surcharges apply. If you are buying in Scotland or Wales, different taxes apply (LBTT and LTT).
How the HMRC SDLT calculator works
SDLT is a slice-based tax, which means each part of the property price is taxed at a different rate band. It is not charged at one single rate on the full price (except by coincidence in some outcomes).
This page calculator follows that same progressive approach and gives you:
- Total estimated SDLT
- Effective tax rate
- A band-by-band breakdown so you can see exactly how the result was produced
Standard residential rates (England & NI)
- 0% on the portion up to £125,000
- 2% on the portion from £125,001 to £250,000
- 5% on the portion from £250,001 to £925,000
- 10% on the portion from £925,001 to £1,500,000
- 12% on the portion above £1,500,000
First-time buyer relief
If eligible and the purchase price is up to £500,000, first-time buyers typically pay:
- 0% on the portion up to £300,000
- 5% on the portion from £300,001 to £500,000
If the property price is above £500,000, first-time buyer relief usually does not apply and standard rates are used.
Higher-rate and non-resident surcharges
For additional properties, higher rates usually apply on top of normal SDLT bands. Non-UK residents may also face an additional surcharge. This calculator lets you toggle both settings so you can model common real-world scenarios.
Worked examples
Example 1: Standard purchase at £350,000
You would pay 0% on the first £125,000, 2% on the next £125,000, and 5% on the remaining £100,000. The total is the sum of those three slices.
Example 2: First-time buyer at £425,000
If eligible, you pay 0% on the first £300,000 and 5% on the remaining £125,000. That usually produces a lower bill than standard rates.
Example 3: Additional property at £300,000
The higher-rate surcharge applies to each SDLT band. This can materially increase the total cost, so always model this before committing to a purchase.
Common SDLT mistakes to avoid
- Assuming SDLT is one flat percentage on the full purchase price
- Forgetting to include additional dwelling surcharges
- Claiming first-time buyer relief when conditions are not met
- Ignoring linked transactions and special cases
- Using out-of-date tax bands
When SDLT is due
In most normal transactions, your conveyancer or solicitor submits the SDLT return and arranges payment. Deadlines are strict, and late filing/payment can trigger penalties and interest. Always confirm final figures with your legal adviser before completion.
Quick FAQ
Is this the official HMRC calculator?
No. This is an independent estimate tool styled for education and planning.
Does this cover companies or mixed-use transactions?
No, this calculator focuses on standard residential scenarios for individuals. Corporate and mixed-use purchases can follow different rules.
Can rates change?
Yes. SDLT rates and reliefs can change after government announcements, so always check current HMRC guidance.