Stamp Duty Land Tax Calculator (England & Northern Ireland)
Estimate SDLT for residential property purchases, including first-time buyer relief and common surcharges.
What is SDLT?
Stamp Duty Land Tax (SDLT) is a tax paid when you buy land or property over a certain price in England and Northern Ireland. The amount is calculated using tax bands, which means different portions of your purchase price are taxed at different rates. This is similar to income tax bands, not a single rate on the whole amount.
How this SDLT calculator works
This calculator estimates your tax in three steps:
- Step 1: Apply the standard residential bands (or first-time buyer relief, if eligible).
- Step 2: Add the additional dwelling surcharge if the property is not your main replacement home.
- Step 3: Add the non-UK resident surcharge when applicable.
You also get a full breakdown so you can see exactly how much tax comes from each band and surcharge.
Residential SDLT rates used in this calculator
Standard residential bands
- 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
- 0% on the portion up to £300,000
- 5% on the portion from £300,001 to £500,000
- If purchase price is above £500,000, standard rates apply to the full price.
Surcharges
- Additional property surcharge: +5% (higher rates for additional dwellings).
- Non-UK resident surcharge: +2%.
Example scenarios
Example 1: Standard purchase at £300,000
The first £125,000 is taxed at 0%, the next £125,000 at 2%, and the final £50,000 at 5%. This gives a total SDLT of £5,000.
Example 2: First-time buyer at £425,000
With first-time buyer relief, the first £300,000 is taxed at 0% and the remaining £125,000 at 5%, giving SDLT of £6,250.
Example 3: Additional property at £425,000
You pay standard SDLT plus an extra 5% surcharge on the purchase price. The surcharge can materially increase your total bill, so it is important to budget early.
Why this matters for your budget
SDLT is often one of the largest upfront buying costs after your deposit. If you do not plan for it, you can run short during conveyancing. A practical approach is to combine this estimate with:
- Conveyancing fees and searches
- Mortgage arrangement and valuation fees
- Survey costs
- Moving costs and immediate repairs
Common SDLT mistakes to avoid
- Assuming one single tax rate applies to the whole price.
- Forgetting to include additional property surcharge.
- Assuming first-time buyer relief always applies regardless of price.
- Relying on old rates from outdated blog posts.
SDLT calculator FAQ
Does this calculator cover Scotland or Wales?
No. Scotland uses LBTT and Wales uses LTT, each with separate rules and bands.
Can this replace legal or tax advice?
No. It is an educational estimate. Your conveyancer should confirm the final tax due for your exact circumstances.
When is SDLT usually paid?
It is typically filed and paid shortly after completion, usually handled by your conveyancer as part of the purchase process.