Key Takeaway

Stamp duty land tax (SDLT) is a tax you pay when buying property in England or Northern Ireland. The amount depends on the purchase price, whether you are a first-time buyer, and whether you already own property. SDLT uses a tiered system, so you pay different rates on different portions of the price, not one flat rate on the whole amount.

What Is Stamp Duty Land Tax?

Stamp duty land tax is a property transaction tax levied on residential and commercial property purchases in England and Northern Ireland. (Scotland and Wales have their own equivalents: land and buildings transaction tax and land transaction tax, respectively.) According to GOV.UK, SDLT must be paid within 14 days of completion, and your solicitor or conveyancer typically handles the filing and payment on your behalf.

The tax applies whether you buy with a mortgage or in cash, and the liability arises at the point you complete the purchase, not when you exchange contracts. As covered in foundational texts such as Principles of Finance, transaction taxes like SDLT affect the total cost of acquiring an asset and must be factored into your budget when planning a property purchase.

How SDLT Rates Work

SDLT uses a tiered (marginal) rate structure, similar to income tax. You pay one rate on the portion of the purchase price that falls within each band, not a single rate on the entire price. This means that a property costing £300,000 does not incur 5% on the full amount; instead, you pay 0% on the first £250,000 and 5% only on the remaining £50,000.

The standard residential rates as of August 2026 are:

  • 0% on the portion up 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

These thresholds and rates change periodically, so verify current rates with GOV.UK or an FCA-authorised mortgage adviser before deciding.

First-Time Buyer Relief

If you qualify as a first-time buyer (you have never owned property anywhere in the world), you benefit from a higher threshold and a discounted rate on the initial band. According to MoneyHelper, first-time buyer relief currently means you pay 0% on the first £425,000 and 5% on the portion from £425,001 to £625,000. Above £625,000, the standard rates apply.

This relief applies only if the property costs £625,000 or less. If the purchase price exceeds that limit, you pay SDLT at the standard rates with no relief.

Read also: Stamp Duty Land Tax in the UK: How Buyers Can Calculate What They Owe

Higher Rates for Additional Properties

If you already own a residential property (whether in the UK or abroad) and you are buying another, you pay an additional 3% surcharge on top of the standard rates for each band. This applies even if you intend to sell your previous home later, unless you sell it before completing the new purchase or you qualify for one of the limited replacement-of-main-residence exceptions.

The surcharge does not apply to first-time buyers purchasing their first home or to those buying a single replacement main residence (provided the previous home is sold within three years and certain conditions are met).

Why Calculation Matters

SDLT can represent a substantial share of your total purchase costs, especially on higher-value properties or when the surcharge applies. Knowing the precise amount in advance helps you budget accurately for completion and avoid surprises. The tiered structure means that small changes in purchase price can have noticeable effects on the tax bill, and understanding whether you qualify for first-time buyer relief or face the surcharge makes a material difference.

Our interactive SDLT calculator applies the current rates and thresholds to your purchase price and circumstances, giving you an accurate estimate instantly. It accounts for first-time buyer relief and the additional property surcharge, so you can see exactly what you owe before you commit.

Using the Calculator

The calculator requires the property purchase price and whether you are a first-time buyer or already own property. It then applies the tiered rates to each portion of the price and returns your total SDLT liability. The result is an estimate based on the rates in force as of August 2026; rates change frequently, so verify current terms with GOV.UK or an FCA-authorised mortgage adviser before deciding.

SDLT liability, deposit requirements, and mortgage eligibility vary by lender, product, and your circumstances. Stamp duty rules differ across England, Scotland, Wales, and Northern Ireland. For personalised advice on your property purchase, speak to an FCA-authorised mortgage adviser or consult MoneyHelper.

Important Information

This article provides general educational information about stamp duty land tax in the UK, not regulated mortgage advice, and not personalised financial, tax, or legal advice. Refisage is not authorised by the Financial Conduct Authority (FCA). You should consider speaking to an FCA-authorised mortgage adviser and a qualified tax professional before making property purchase decisions.

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