Stamp Duty Calculator

How Stamp Duty Land Tax (SDLT) Works

The stamp duty calculator computes the Stamp Duty Land Tax owed when buying property in England and Northern Ireland. SDLT is a tiered tax — like income tax brackets — where each portion of the purchase price is taxed at the applicable rate, not the full price at the top rate. With 1,000 monthly searches, this tool is essential for UK homebuyers planning their purchase costs.

Example: Buying a £350,000 home in 2024. SDLT calculation: £0–£250,000 at 0% = £0. £250,001–£350,000 (£100,000) at 5% = £5,000. Total SDLT: £5,000 (1.43% effective rate, not 5%).

Stamp Duty Rates 2024 (England and Northern Ireland)

• Up to £250,000: 0% (nil rate band)
• £250,001 – £925,000: 5%
• £925,001 – £1,500,000: 10%
• Over £1,500,000: 12%

First-time buyers: 0% on first £425,000 and 5% on £425,001–£625,000. Properties over £625,000 do not qualify for first-time buyer relief.

Additional property surcharge: +3% on all bands for second homes, buy-to-let, and additional residential properties. A buy-to-let purchase at £350,000 pays: £0–£250,000 at 3% = £7,500; £250,001–£350,000 at 8% = £8,000. Total: £15,500.

SDLT Calculator: Scotland and Wales Differences

• Scotland (LBTT): Land and Buildings Transaction Tax — different thresholds and rates; first-time buyer relief up to £175,000
• Wales (LTT): Land Transaction Tax — different rate structure; no first-time buyer relief

This calculator applies England/Northern Ireland SDLT rates. For Scottish or Welsh properties, use HMRC's or Revenue Scotland's official calculators.

Stamp Duty on House Purchase: When Is It Due?

SDLT must be submitted and paid to HMRC within 14 days of property completion. Your solicitor or conveyancer handles this automatically. Failure to pay triggers automatic interest and surcharges. Non-residential property has different rates: 0% up to £150,000; 2% on £150,001–£250,000; 5% above £250,000.

Frequently Asked Questions

Do I pay stamp duty on a new build property?

Yes — stamp duty applies to all property purchases including new builds, calculated on the total purchase price. Some new-build developers offer "stamp duty paid" incentives, covering some or all of your SDLT liability as part of the deal. Always verify exactly what's covered and ensure your solicitor accounts for any developer contributions correctly in the paperwork.

Can stamp duty be added to the mortgage?

Some lenders allow SDLT to be added to the mortgage amount, but this significantly increases total interest paid over the mortgage term. Most financial advisors recommend paying SDLT from savings rather than financing it. If you lack the cash, consider delaying purchase until you've saved the SDLT separately from your deposit to minimize long-term cost.

Stamp Duty Calculator: Real Examples at Key Price Points

• £200,000 property (first-time buyer): 0% × £200,000 = £0 SDLT. Well within first-time buyer nil-rate band.
• £350,000 property (standard purchase): 0% × £250,000 + 5% × £100,000 = £5,000
• £500,000 property (standard purchase): 0% × £250,000 + 5% × £250,000 = £12,500
• £500,000 property (first-time buyer): 0% × £425,000 + 5% × £75,000 = £3,750 (saving £8,750 vs. standard rate)
• £1,000,000 property: 0% × £250,000 + 5% × £675,000 + 10% × £75,000 = £0 + £33,750 + £7,500 = £41,250
• £350,000 buy-to-let: (0%+3%) × £250,000 + (5%+3%) × £100,000 = £7,500 + £8,000 = £15,500

Note that SDLT is due on the total consideration paid, including any chattels included in the sale if they exceed the HMRC threshold. Unusual arrangements — part-exchange, gifted deposits, builder incentives — can affect the SDLT calculation and require careful scrutiny by your conveyancer. Mixed residential/commercial use has its own SDLT calculation rules and can sometimes reduce the liability on primarily residential properties with a small commercial element.

Stamp Duty Calculator: SDLT Relief Schemes and Exceptions

Beyond first-time buyer relief, several other SDLT relief schemes can reduce your liability. Multiple Dwellings Relief (MDR) applies when buying more than one dwelling in a single transaction — the SDLT is calculated based on the average price per property rather than the total, often significantly reducing the bill for portfolio purchases. However, HMRC has recently tightened MDR eligibility — ensure your purchase genuinely qualifies.

Charitable SDLT relief applies when a registered charity buys land or property for charitable purposes — they pay 0% SDLT. Community Infrastructure Levy (CIL) is a separate charge on new builds in some areas and is not SDLT, though it can also add significant cost to new development purchases. Always request a full breakdown of all additional charges beyond the property price before exchanging contracts.

Purchasing using a company name attracts a 15% "higher rates for companies" SDLT on residential properties over £500,000, making company purchases of high-value residential property extremely expensive. Properties held through companies for genuine business purposes (bed and breakfast operators, care homes) may qualify for exemptions — consult a specialist conveyancer or tax advisor before structuring purchases through a corporate vehicle.