UK Stamp Duty Land Tax Calculator
Estimate residential SDLT for property purchases in England and Northern Ireland using rates effective from 1 April 2025.
Purchase details
Estimated SDLT
Band-by-band calculation
| Price band | Amount in band | Rate | Tax |
|---|---|---|---|
| Total | £450,000 | £12,500 |
How to use this UK SDLT calculator
What this calculator does
This calculator estimates Stamp Duty Land Tax on a residential property purchase in England or Northern Ireland. It applies the progressive residential bands effective from 1 April 2025, then adds the higher-rate surcharge for an additional dwelling and/or the non-UK resident surcharge when selected. It is useful for budgeting the cash needed at completion, comparing properties at different prices, checking the effect of buyer status, and reviewing an estimate supplied by an adviser. It does not determine legal eligibility for relief, residence status, replacement-main-residence treatment, refunds, linked-transaction rules, lease rent NPV, or mixed-use treatment. HMRC's current residential SDLT rates and first-time buyer rules remain the authoritative source.
How to calculate
- The calculator opens with a ready-to-use demonstration: a moving-home purchase by a UK resident at £450,000. The displayed estimate and Excel workbook are available immediately.
- Choose Buyer type. Select first-time buyer only when every purchaser qualifies and the property price is no more than £500,000. Choose additional property when the higher rates apply.
- Choose Residency. Select the non-UK option only when the statutory residence test for the 2% SDLT surcharge is met.
- Replace the Property price. The results and band table update live. Review the total SDLT, effective rate, total price plus SDLT, surcharge amount, and each taxable band.
- Select Download Excel to export the current validated inputs and results as a genuine .xlsx workbook. Reset clears the demonstration values and results; export remains disabled until a complete valid price is entered again.
Input guide
Buyer type is required and accepts one of three categories. “First-time buyer” uses 0% up to £300,000 and 5% from £300,001 to £500,000; above £500,000 the ordinary rates apply to the whole price. “Moving home / replacing main residence” uses standard rates. “Additional property / buy-to-let” adds 5 percentage points to every standard band. A common mistake is selecting moving home merely because a previous property will eventually be sold; the timing and replacement rules can affect whether higher rates are due.
Residency is required. “UK resident for SDLT” adds no residence surcharge. “Non-UK resident surcharge applies” adds 2 percentage points to each applicable band, including first-time-buyer bands when relief otherwise applies. Residence for SDLT is a specific legal test, not simply nationality or visa status. Review HMRC's non-UK resident SDLT guidance before relying on the selection.
Property price is required and is entered in pounds sterling. Values from £1 to £1,000,000,000 are accepted, with an optional decimal point and correctly placed comma thousands separators, such as 450,000 or 450000.00. Do not use decimal commas or scientific notation. A higher price can move part of the transaction into higher marginal bands; it does not cause the entire price to be taxed at the top rate.
Output guide and worked example
Stamp Duty Land Tax is the estimated tax due. Effective tax rate is SDLT divided by property price, so it is normally lower than the highest marginal band rate. Total price plus SDLT combines the purchase price and estimated tax for a simple cash-budget figure; it excludes legal fees, searches, mortgage costs, and other completion expenses. Surcharge included isolates the extra tax caused by the selected additional-property and/or non-resident surcharge compared with the corresponding unsurcharged bands. Taxable bands used counts bands containing part of the price. The table shows the amount of the price in each band, the rate applied, and the resulting tax; zero-rate rows may still count as used because part of the purchase price occupies them.
For the startup example, a UK-resident moving-home buyer pays £450,000. The first £125,000 is taxed at 0% (£0), the next £125,000 at 2% (£2,500), and the remaining £200,000 at 5% (£10,000). Total SDLT is therefore £12,500. The effective rate is £12,500 ÷ £450,000 = 2.78%, and the simple price-plus-tax total is £462,500.
Rates, scope, and important limitations
SDLT applies to land and property transactions in England and Northern Ireland. Scotland uses Land and Buildings Transaction Tax, while Wales uses Land Transaction Tax. The standard residential bands from 1 April 2025 are 0% to £125,000, 2% on the next £125,000, 5% to £925,000, 10% to £1.5 million, and 12% above £1.5 million. Additional dwellings generally use rates five percentage points higher. HMRC explains the higher rates for additional residential properties, including replacement-main-residence and refund rules.
The price field usually represents the chargeable consideration, which can be broader than cash paid and may include debt assumed or other value transferred. Complex consideration should be checked against HMRC's guidance on what to include in an SDLT calculation. New leaseholds can also create tax on the net present value of rent, which this calculator does not model. Use the estimate for planning and reconciliation, not as a substitute for the transaction return or professional advice.
How the progressive formula works
A threshold is not a cliff edge. For example, increasing a standard purchase from £250,000 to £250,001 does not tax the full price at 5%; only the final £1 enters the 5% band. First-time-buyer relief is different at its £500,000 maximum: once the price exceeds that limit, relief is unavailable and ordinary residential rates apply to the whole transaction. Additional-property and non-resident surcharges are added to each relevant band rate, so they can create tax even on the first portion of the price.