Stamp Duty Land Tax Calculator

How this calculator works

This browser-based tool helps you make a first, transparent estimate from the values you provide. Enter the figures in the fields and the result updates as you edit them. JavaScript performs the calculation on your device; the calculator does not send your salary, property, vehicle or account details to a calculation server. Keep supporting documents secure and only enter sensitive figures on a device you trust.

Formula, assumptions and limits

Estimate residential SDLT for England and Northern Ireland. Rates and eligibility can depend on tax year, residence, transaction details and individual circumstances. UK income tax, National Insurance and SDLT follow separate rules; SDLT applies in England and Northern Ireland, while Wales and Scotland have different property-tax systems. Check current official guidance before acting.

Do not rely on a rounded estimate for a tax return, payment or legal decision. Compare it with official notices, current rate tables and professional advice where needed. Real-world outcomes may include additional reliefs, fees, rate changes or personal circumstances that a simple calculator cannot represent. Your entries are not saved and are discarded when you close the tab.

Use the output as a planning aid: verify each input, read the assumptions and adjust the figures when your circumstances differ. If an important detail is uncertain, contact the relevant authority or a qualified tax, legal or financial professional.

Before acting, check your inputs, tax year and jurisdiction. Note the assumptions used, compare the result with records and official guidance, and recalculate when rules or your circumstances change.

How residential SDLT bands and relief work

Stamp Duty Land Tax is charged in slices of a property price, not at one rate on the whole purchase. This calculator applies the residential bands for England and Northern Ireland, then displays an effective rate by comparing estimated SDLT with the entered price. Eligible first-time buyers can receive relief on qualifying purchases up to the statutory price limit; the form asks whether the buyer qualifies and whether an additional property surcharge applies. Enter the full price and check the eligibility choices carefully, since small changes around a threshold can change the marginal tax on part of the price.

SDLT rules do not cover every UK property purchase. Scotland uses Land and Buildings Transaction Tax and Wales uses Land Transaction Tax, so their transactions need different calculators. Joint buyers, non-resident surcharges, trusts, linked transactions, mixed-use property, lease premiums and replacement of a main residence can alter the liability. First-time buyer relief also has detailed conditions about prior ownership and all purchasers. The estimate does not ask every question needed for a return. Review HMRC’s current guidance and transaction documents before filing, and confirm that the property location and completion date match the relevant rates. A conveyancer can calculate the amount due and submit the return.

Frequently asked questions