Stamp Duty Calculator (UK)
This calculator estimates residential Stamp Duty Land Tax (SDLT) for England and Northern Ireland. Scotland and Wales use different systems (LBTT and LTT).
Important: this is an estimate only. Always confirm your final liability with your solicitor or conveyancer.
How stamp duty works in the UK
When people search for a stamp duty calculator uk, they usually want a quick and clear estimate of tax due when buying a home. The key point is that property transaction tax is not identical across the whole UK:
- England and Northern Ireland: SDLT (Stamp Duty Land Tax)
- Scotland: LBTT (Land and Buildings Transaction Tax)
- Wales: LTT (Land Transaction Tax)
The calculator above is built for SDLT in England and Northern Ireland for residential purchases. That means you can use it to estimate purchase costs, compare scenarios, and plan your budget before you offer on a property.
SDLT bands used in this calculator
This page applies the standard residential SDLT band structure used from April 2025 onward in England and Northern Ireland:
- 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 £1.5 million
- 12% on the portion above £1.5 million
It is a marginal tax, which means you do not pay one single rate on the whole purchase price. Instead, different slices of the price are taxed at different rates. That is why accurate calculators are valuable: they avoid common overestimation errors.
First-time buyer relief
If you are eligible as a first-time buyer and the purchase price is £500,000 or less, the relief typically works as follows:
- 0% on the first £300,000
- 5% on the portion from £300,001 to £500,000
If the property is over £500,000, first-time buyer relief does not apply and standard rates are used.
Higher rates and non-resident surcharge
If the purchase is an additional property, higher rates can apply (modeled here as a +5% surcharge across bands). If the purchase is by a non-UK resident for SDLT purposes, an extra +2% can apply. In some transactions, both can apply together.
Worked examples
Example 1: Standard buyer at £300,000
Tax is calculated in slices:
- £0 to £125,000 at 0% = £0
- £125,001 to £250,000 (i.e. £125,000) at 2% = £2,500
- £250,001 to £300,000 (i.e. £50,000) at 5% = £2,500
Total SDLT estimate: £5,000
Example 2: First-time buyer at £425,000
- £0 to £300,000 at 0% = £0
- £300,001 to £425,000 (i.e. £125,000) at 5% = £6,250
Total SDLT estimate: £6,250
Example 3: Additional property at £650,000
Using higher rates (+5% on each band), the bill can rise significantly. This is why scenario testing in a calculator is useful before committing to an offer.
Why use a stamp duty calculator before making an offer?
- Budget accuracy: avoid being short on completion funds.
- Offer strategy: know your total acquisition cost, not just price.
- Mortgage planning: align tax, fees, and deposit timing.
- Scenario testing: compare first-time buyer, additional property, or non-resident outcomes.
Common mistakes to avoid
1) Applying one rate to the whole price
SDLT is progressive. A proper calculation uses bands, not a single flat rate.
2) Assuming first-time relief always applies
Relief has eligibility rules and a price cap. If conditions are not met, standard rates apply.
3) Ignoring surcharges
Additional property and non-resident status can materially increase the tax bill.
4) Forgetting regional differences
Scotland and Wales do not use SDLT. Use the correct tax system for the property location.
Final note
This page is designed to give you a fast, practical estimate while you search, shortlist, and negotiate. For legal completion figures, always rely on your conveyancer's statement and HMRC guidance applicable on your completion date.