UK Stamp Duty Land Tax (SDLT) Calculator 2026

Understanding Stamp Duty Land Tax (SDLT)

Stamp Duty Land Tax (SDLT) is a tax paid by individuals purchasing property or land in England and Northern Ireland. It’s a crucial consideration for anyone looking to buy a home, a buy-to-let property, or an additional residential property. This tax is levied on a tiered basis, meaning different portions of the property price are taxed at different rates. Understanding SDLT is essential for budgeting your property purchase and avoiding unexpected costs.

This calculator helps you estimate the SDLT payable based on the property price, whether you are a first-time buyer, or if you are purchasing an additional property.

How Stamp Duty Land Tax is Calculated

SDLT is calculated based on the purchase price of the property, with different rates applying to different price bands. There are also specific rules and rates for first-time buyers and those purchasing additional properties (including buy-to-let).

The calculation involves applying the relevant percentage rate to the portion of the property price that falls within each tax band. These bands and rates are set by HM Revenue & Customs (HMRC) and can be subject to change.

Standard Residential Property Rates (Effective 2026)

Property Price Band	SDLT Rate
Up to £250,000	0%
The next £675,000 (over £250,000 to £925,000)	5%
The next £575,000 (over £925,000 to £1.5 million)	10%
The portion over £1.5 million	12%

First-Time Buyer Relief (Effective 2026)

First-time buyers can claim relief if they (and anyone else they are buying with) have never owned a residential property in the UK or abroad.

• Up to £425,000: No SDLT is payable.
• From £425,001 to £625,000: A 5% SDLT rate applies to the portion of the purchase price over £425,000.
• Over £625,000: First-time buyer relief does not apply, and standard rates are used.

Higher Rates for Additional Dwellings (Effective 2026)

An additional 3% surcharge applies on top of the standard SDLT rates when you buy an additional residential property (e.g., a second home, buy-to-let property). This applies if, at the end of the day of the purchase, you own two or more residential properties.

Property Price Band	Higher Rate for Additional Dwellings
Up to £250,000	3%
The next £675,000 (over £250,000 to £925,000)	8% (5% + 3%)
The next £575,000 (over £925,000 to £1.5 million)	13% (10% + 3%)
The portion over £1.5 million	15% (12% + 3%)

The calculator takes these different scenarios into account to provide an accurate estimate of your SDLT liability.

Key Variables Explained

• Property Price: This is the total amount you are paying for the property. It’s the primary factor in determining your SDLT liability.
• Are you a first-time buyer?: Selecting ‘Yes’ applies the first-time buyer relief rules, potentially reducing or eliminating your SDLT. You must meet HMRC’s eligibility criteria.
• Is this a buy-to-let or additional property?: Selecting ‘Yes’ applies the higher rates for additional dwellings, increasing your SDLT payable.

Example Scenarios

Let’s look at a few common scenarios to illustrate how SDLT is calculated.

Scenario	Property Price	First-Time Buyer	Additional Property	Total SDLT Payable	Effective SDLT Rate
Standard Purchase	£0	No	No	£0	0%
First-Time Buyer Relief (under £425k)	£0	Yes	No	£0	0%
Buy-to-Let Property (Higher Rates)	£0	No	Yes	£0	0%
First-Time Buyer Relief (between £425k-£625k)	£0	Yes	No	£0	0%

Official Sources and References

The information and rates used in this calculator are based on official guidance from HM Revenue & Customs (HMRC), the UK’s tax authority. For the most up-to-date and definitive information, always refer to the official government website.

• HM Revenue & Customs (HMRC) - Stamp Duty Land Tax (SDLT): https://www.gov.uk/stamp-duty-land-tax/residential-property-rates

Important Tips and Considerations

• Stay Updated: SDLT rates and rules can change, especially during government budgets or economic updates. Always check the latest information from HMRC before making a property purchase.
• Seek Professional Advice: For complex property transactions, or if you are unsure about your eligibility for reliefs or higher rates, it is always advisable to consult with a solicitor, conveyancer, or financial advisor.
• Leasehold Properties: SDLT rules for leasehold properties can be more complex, especially concerning lease premiums and rent.
• Mixed-Use Properties: If a property has both residential and non-residential elements, different SDLT rules may apply.
• Overseas Buyers: Non-UK residents may be subject to an additional 2% surcharge on top of the standard or higher rates of SDLT.
• Linked Transactions: If you buy multiple properties from the same seller, or from connected persons, in a single transaction or a series of linked transactions, special rules may apply which could affect your overall SDLT liability.