UK Stamp Duty Calculator
TaxCalculate UK Stamp Duty Land Tax (SDLT) on your property purchase instantly. Covers first-time buyer relief and the additional property surcharge.
🇬🇧This tool is specific to United Kingdom
Stamp Duty Owed
£5,000
Effective Tax Rate
1.67%
Total Cost (Price + SDLT)
£305,000
What is a UK Stamp Duty?
The UK Stamp Duty Calculator works out how much Stamp Duty Land Tax (SDLT) you'll owe on a residential property purchase in England or Northern Ireland. SDLT is charged in bands rather than as a flat percentage — the first slice of the price is tax-free, and each portion above that is taxed at a progressively higher rate, up to 12% on the amount above £1.5 million.
Most buyers underestimate SDLT because they mentally apply the top band rate to the whole price instead of just the slice that falls into it. If you're comparing this against monthly costs, it's worth running the numbers alongside a Mortgage Calculator so you see the full picture of what a purchase actually costs beyond the headline price. Whether you're a first-time buyer, moving home, or adding a buy-to-let to a portfolio, the rules that apply to you differ enough that a generic percentage estimate isn't good enough — this tool applies the right band and relief automatically based on your situation.
How to use this UK Stamp Duty calculator
- Enter the Property Purchase Price using the input field or the slider — the calculator updates live as you move it.
- Set First-Time Buyer to "Yes" if this will be your only property and you've never owned residential property before, anywhere.
- Set Additional Property to "Yes" if you'll own more than one residential property after this purchase (buy-to-let, second home, holiday home).
- Check the Stamp Duty Owed figure in the results panel — this updates instantly as you change any input.
- Compare the Effective Tax Rate against other price points if you're deciding between two properties.
- Use the Total Cost figure to check against your available funds and mortgage offer before making an offer or exchanging contracts.
Formula & Methodology
SDLT is calculated as the sum of tax owed in each price band the purchase price passes through: Standard bands: 0% up to £125,000 → 2% from £125,001–£250,000 → 5% from £250,001–£925,000 → 10% from £925,001–£1,500,000 → 12% above £1,500,000. First-time buyer bands (purchases up to £500,000 only): 0% up to £300,000 → 5% from £300,001–£500,000. Above £500,000, standard bands apply to the full price instead. Additional property surcharge: +5% of the full purchase price, added on top of whichever band calculation applies (standard bands only — relief doesn't combine with the surcharge). Worked example: a first-time buyer purchasing a £350,000 home falls above the £300,000 relief ceiling but below £500,000, so relief bands still apply: £0 tax on the first £300,000, then 5% on the remaining £50,000 = £2,500 SDLT, an effective rate of about 0.71%. The same £350,000 purchase as an additional property instead uses standard bands (£0 on the first £125,000, 2% on the next £125,000 = £2,500, 5% on the remaining £100,000 = £5,000, totalling £7,500) plus a 5% surcharge on the full price (£17,500), for a combined £25,000 SDLT — an effective rate of roughly 7.14%.
Frequently Asked Questions
SDLT is a tax you pay to HMRC when you buy property or land in England or Northern Ireland above a certain price. It's charged in bands, so you only pay the higher rate on the portion of the price that falls into that band, not on the whole purchase price. Scotland and Wales run their own versions (LBTT and LTT), so this calculator applies to England and Northern Ireland purchases only.
SDLT is worked out in slices. The first portion of the price is taxed at 0%, the next slice at 2%, then 5%, 10%, and 12% as the price climbs through each band. You add up the tax owed in each band rather than applying one flat rate to the full price — that's why the effective rate shown by this calculator is always lower than the top marginal band you fall into.
First-time buyers get relief on properties up to £500,000: no SDLT on the first £300,000, then 5% on the portion between £300,001 and £500,000. Buy a first home above £500,000 and the relief disappears entirely, so you pay standard rates on the full price instead — it's a cliff-edge, not a taper.
Broadly, any residential property you buy while you already own another one — a buy-to-let, a second home, or a holiday property. HMRC adds a 5% surcharge on top of the standard bands for these purchases, and first-time buyer relief doesn't apply to them even if it's technically your first purchase in your own name.
The standard bands apply to anyone buying a residential property they don't already own another one alongside. The surcharge is an extra 5% added on top of whichever band rate applies, charged on the entire purchase price rather than just the portion above a threshold. That's why buying a £300,000 buy-to-let can cost thousands more in SDLT than buying the same property as your only home.
Enter the purchase price, then tell it whether you're a first-time buyer and whether the property is an additional one. The calculator updates the Stamp Duty Owed, Effective Tax Rate, and Total Cost figures instantly as you adjust the price slider — no need to click a separate 'calculate' button.
No — the two are mutually exclusive by definition. If the property counts as an additional one, you're not buying your only residence, so first-time buyer relief doesn't apply regardless of whether you've owned property before. The calculator applies this rule automatically when you select 'Yes' for additional property.
SDLT is due within 14 days of completion and is paid directly to HMRC, typically handled by your solicitor or conveyancer as part of the completion process. Some lenders will let you add it to your mortgage rather than paying it as a lump sum, though that means paying interest on it over the term of the loan.
It's the total SDLT owed expressed as a percentage of the purchase price, which gives you a single number to compare across different price points or scenarios. Because SDLT is banded, the effective rate is always lower than the top rate band your purchase price reaches — a £600,000 purchase in the 5% band won't actually cost 5% of £600,000 in tax.
No. Scotland charges Land and Buildings Transaction Tax (LBTT) and Wales charges Land Transaction Tax (LTT), both of which use different bands and rates from SDLT. This tool is built specifically for England and Northern Ireland purchases.
SDLT bands get revised periodically through government budgets — the additional property surcharge, for example, rose from 3% to 5% in the October 2024 Budget. Always treat this calculator as a planning estimate and confirm the exact figure with your solicitor before exchange, since rates can shift between when you start house-hunting and when you complete.
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