UK Stamp Duty (SDLT)

About the UK Stamp Duty (SDLT)

The UK stamp duty calculator tells you exactly how much Stamp Duty Land Tax (SDLT) you will pay on a residential property purchase in England or Wales in 2025. SDLT is a tiered tax charged by the government on property transactions above certain values, and it must be paid within 14 days of completion. Understanding your stamp duty liability before making an offer is essential: on a £500,000 property, the stamp duty bill can range from £0 (first-time buyer below the relief threshold) to £27,500 (standard mover) to £42,500 (additional property purchaser paying the 3% surcharge). These are not small numbers — they directly affect how much deposit you need and whether your purchase is financially viable. The standard SDLT bands for 2025 are: 0% on the first £125,000, 2% from £125,001 to £250,000, 5% from £250,001 to £925,000, 10% from £925,001 to £1.5 million, and 12% above £1.5 million. Like income tax, SDLT is calculated on each band separately — only the portion of the price in each band is charged at that band's rate. This means a £300,000 purchase does not attract 5% on the entire price, only on the £50,000 above the £250,000 threshold. First-time buyers receive a significant relief: 0% on the first £425,000 (rather than the standard £125,000 nil-rate band), with the 5% rate applying from £425,001 to £625,000. This relief is not available on properties priced above £625,000 — at that point, standard rates apply to the full purchase price. The first-time buyer relief provides a maximum saving of £11,250 compared to standard rates on a £425,000 property. People purchasing an additional residential property — a second home, buy-to-let investment, or holiday home — pay a 3% surcharge on top of every standard band. This surcharge was introduced to cool the buy-to-let market and makes investment property purchases significantly more expensive: a £300,000 buy-to-let property attracts £14,000 in stamp duty versus £5,000 for an equivalent primary residence purchase. Non-UK residents face a further 2% surcharge on residential property purchases — a measure introduced in April 2021 intended to improve affordability for domestic buyers. This applies on top of both standard rates and the additional dwelling surcharge, meaning a non-resident buy-to-let investor buying at £400,000 faces a very substantial tax bill. The Welsh equivalent of SDLT is the Land Transaction Tax (LTT), which uses slightly different thresholds and rates. The Scottish equivalent is Land and Buildings Transaction Tax (LBTT), again with separate thresholds. Our calculator covers England and Wales SDLT only. SDLT is paid by the buyer, never the seller. It is typically handled by your conveyancing solicitor who submits the SDLT return and payment to HMRC from the completion funds. We update this calculator after every Budget where SDLT thresholds may change, and on April 6 each year.

How It Works

SDLT is charged on the portion of the price in each band, not the entire price. Example: £400,000 property, standard home mover. Band 1: £125,000 × 0% = £0. Band 2: (£250,000 − £125,000) × 2% = £125,000 × 2% = £2,500. Band 3: (£400,000 − £250,000) × 5% = £150,000 × 5% = £7,500. Total SDLT = £10,000. Effective rate = £10,000 / £400,000 = 2.5%. Same property as first-time buyer: Band 1: £400,000 × 0% (FTB nil-rate extends to £425,000) = £0. Total SDLT = £0. Saving = £10,000. Same property with additional dwelling surcharge: each band rate increases by 3%. Band 1: £125,000 × 3% = £3,750. Band 2: £125,000 × 5% = £6,250. Band 3: £150,000 × 8% = £12,000. Total = £22,000.

Tips & Best Practices

• ✓The £625,000 first-time buyer relief cliff edge is one of the sharpest in UK taxation — a property priced at £624,999 attracts £0 SDLT for a first-time buyer, while one priced at £625,001 attracts £11,250. Vendors selling to first-time buyers should be aware of this and price accordingly.
• ✓Multiple Dwellings Relief (MDR) can reduce SDLT on purchases of more than one dwelling in a single transaction — for example, buying a house with an annexe that constitutes a separate dwelling. MDR is calculated on the average price per dwelling and can create significant savings on the right properties.
• ✓SDLT must be paid within 14 days of completion — your solicitor should have this factored into your completion statement. Late payment attracts penalties and interest from HMRC, so ensure completion funds include the full SDLT amount.
• ✓The 3% additional dwelling surcharge can be reclaimed if you sell your previous main residence within 3 years of the new purchase. This is relevant for people who buy a new home before selling their existing one — they pay the surcharge upfront but can claim it back.
• ✓Scotland and Wales have their own property taxes — LBTT (Scotland) and LTT (Wales) — which have different thresholds and rates from SDLT. The Scottish first-time buyer threshold is £175,000 and the additional dwelling surcharge is 6% in Scotland, significantly higher than England's 3%.
• ✓Non-residential SDLT applies to commercial properties, mixed-use buildings, and land. The rates and thresholds are completely different from residential SDLT — if your property has any commercial element, the non-residential or mixed-use rules may apply and can sometimes be more favourable.
• ✓SDLT group relief is available when properties transfer between companies in the same corporate group. This is a key consideration for property investors operating through corporate structures.
• ✓First-time buyer status applies to each purchaser individually — if two buyers are purchasing together and one has previously owned a property, the whole purchase loses first-time buyer relief even if the other buyer has never owned property.

Who Uses This Calculator

First-time buyers use the stamp duty calculator before making an offer to determine whether they qualify for first-time buyer relief and the exact cash needed for completion day alongside their deposit. Landlords evaluating buy-to-let investments model the additional dwelling surcharge impact on their purchase costs and cash-on-cash returns — at higher price points the surcharge alone can exceed £20,000. Overseas buyers calculating the combined impact of the additional dwelling surcharge and non-resident surcharge to understand total transaction costs. Home movers upsizing to a property above £925,000 discover the 10% and 12% bands for the first time and may plan their offer around staying below key thresholds. Sellers indirectly affected — understanding how much stamp duty their buyer faces helps price properties appropriately, particularly around the thresholds where small price adjustments create meaningful duty savings. Conveyancers and mortgage brokers use stamp duty calculators as a standard tool when providing completion cost estimates to clients. Property investors comparing purchase costs in England versus Scotland (LBTT) versus Wales (LTT) to identify the most tax-efficient jurisdiction for portfolio expansion.