Stamp Duty vs SDLT: What's the Difference?
"Stamp duty" is the term most people use when talking about the tax paid on property purchases in the UK, but the reality is more nuanced. Since devolution, different parts of the UK operate entirely separate property tax systems with different names, thresholds, rates, and relief schemes. Using the wrong calculator or applying the wrong rates for your region can lead to budget shortfalls of thousands of pounds. This guide explains exactly how each system works and what changed with the 2024 SDLT reforms.
A Brief History of Property Transaction Tax in the UK
Stamp duty has existed in the UK in various forms since 1694, originally as a flat-rate tax on legal documents. The modern version -- a progressive tax on property transactions -- was formalised as Stamp Duty Land Tax (SDLT) in 2003 under the Finance Act. For over a decade, SDLT applied uniformly across the UK. That changed with devolution. Scotland introduced Land and Buildings Transaction Tax (LBTT) in April 2015, replacing SDLT entirely for Scottish property transactions. Wales followed with Land Transaction Tax (LTT) in April 2018. England and Northern Ireland retained SDLT. The term "stamp duty" persists in everyday language as a catch-all for all three systems, which causes confusion. When someone says "I need to pay stamp duty on my house," the actual tax they pay depends entirely on where the property is located, not where the buyer lives.
SDLT in England and Northern Ireland: Current Rates and Thresholds
Stamp Duty Land Tax applies to residential property purchases in England and Northern Ireland. Following the 2024 reforms, the current thresholds for standard residential purchases are: - £0 to £125,000: 0% - £125,001 to £250,000: 2% - £250,001 to £925,000: 5% - £925,001 to £1,500,000: 10% - Over £1,500,000: 12% First-time buyers benefit from enhanced nil-rate relief: no SDLT on the first £300,000 for properties up to £500,000, with 5% on the portion between £300,001 and £500,000. The additional dwelling surcharge -- paid by buyers who already own a residential property -- adds 5% on top of each band rate. This was increased from 3% as part of the 2024 reforms, representing a significant additional cost for buy-to-let investors and those purchasing second homes. SDLT is calculated on a progressive basis, meaning each band rate only applies to the portion of the price falling within that band. A £350,000 standard purchase would pay: £0 on the first £125,000, £2,500 on the next £125,000, and £5,000 on the remaining £100,000, totalling £7,500.
LBTT in Scotland: A Different System Entirely
Scotland's Land and Buildings Transaction Tax operates independently from SDLT with its own band structure. The current LBTT rates for residential property are: - £0 to £145,000: 0% - £145,001 to £250,000: 2% - £250,001 to £325,000: 5% - £325,001 to £750,000: 10% - Over £750,000: 12% Scotland also has an Additional Dwelling Supplement (ADS) of 8%, but unlike England's surcharge which is added to each band, the ADS is calculated as a flat 8% on the entire purchase price. This makes the Scottish surcharge significantly more expensive for higher-value properties. For example, on a £400,000 additional property purchase: in England, the additional dwelling surcharge adds £20,000 (5% across bands). In Scotland, the ADS adds £32,000 (8% of £400,000). That is a difference of £12,000 -- a substantial sum that catches many buyers off guard. Scotland offers its own first-time buyer relief, raising the nil-rate threshold to £175,000 for qualifying purchasers.
The 2024 SDLT Reforms: What Changed and Why It Matters
The 2024 SDLT reforms in England and Wales made several significant changes that affect property buyers in 2026: The temporary COVID-era nil-rate threshold increase was restructured rather than simply extended. The standard nil-rate band settled at £125,000, while first-time buyer relief was preserved at £300,000 for properties up to £500,000. The additional dwelling surcharge was increased from 3% to 5%, reflecting the government's intention to discourage speculative property investment. These changes mean that standard buyers purchasing properties between £125,000 and £250,000 now pay 2% on the portion above £125,000, whereas during the temporary relief period this portion was tax-free. For a £250,000 purchase, this represents an additional £2,500 in stamp duty compared to the temporary rates. First-time buyers were largely shielded from the changes, retaining their enhanced nil-rate band. However, the £500,000 property price cap for first-time buyer relief remains a significant cliff edge -- a first-time buyer purchasing at £500,001 loses all relief and pays standard rates on the entire amount. The increased additional dwelling surcharge has the largest impact. A buy-to-let investor purchasing a £300,000 property now pays £15,000 in surcharge alone (5% of £300,000), compared to £9,000 under the old 3% rate. Combined with higher mortgage rates, this has materially changed the economics of property investment in England and Wales.