A lot of buyers estimate Stamp Duty by multiplying their purchase price by one percentage. That's not how SDLT works. It's a banded, "slice" tax — different rates apply only to the portion of the price that falls within each band, and a single threshold decides whether first-time buyer relief applies at all, or not even a little.
The Standard Bands (England and Northern Ireland)
| Portion of Price | Rate |
|---|---|
| £0 – £125,000 | 0% |
| £125,001 – £250,000 | 2% |
| £250,001 – £925,000 | 5% |
| £925,001 – £1,500,000 | 10% |
| Above £1,500,000 | 12% |
First-Time Buyer Relief — and Its Cliff Edge
First-time buyers pay 0% up to £300,000, then 5% on the portion from £300,001 to £500,000. Above £500,000, the relief disappears entirely — not partially. A first-time buyer purchasing at £500,001 pays full standard rates on the whole price, not just the relief rate up to £300,000 plus standard rates above it.
Worked Example
A standard (non-first-time) buyer purchasing at £500,000:
| Band | Taxed Amount | Rate | Tax |
|---|---|---|---|
| £0 – £125,000 | £125,000 | 0% | £0 |
| £125,001 – £250,000 | £125,000 | 2% | £2,500 |
| £250,001 – £500,000 | £250,000 | 5% | £12,500 |
| Total Standard Tax | £15,000 |
The same £500,000 purchase as a first-time buyer:
| Band | Taxed Amount | Rate | Tax |
|---|---|---|---|
| £0 – £300,000 | £300,000 | 0% | £0 |
| £300,001 – £500,000 | £200,000 | 5% | £10,000 |
| Total First-Time Tax | £10,000 |
First-time buyer relief saves exactly £5,000 here — but push the purchase price to £500,001 and the relief vanishes completely, and the first-time buyer owes the full £15,000+ standard-rate bill instead.
Surcharges Stacked on Top
Buying an additional property (a second home or buy-to-let) adds a 5 percentage point surcharge to every band. Non-UK residents add a further 2% surcharge on top of whatever rate otherwise applies. These stack — a non-resident buying a second home pays standard rates, plus 5%, plus 2%.
Common Mistakes
Buyers frequently calculate SDLT as a single flat rate on the full price, overstating or understating their actual liability — the banded structure means the "rate" you see quoted is really the top marginal band, not your effective rate on the whole purchase.
Buyers also miss the first-time buyer relief cliff edge entirely — pricing a purchase at £510,000 instead of staying under £500,000 costs a first-time buyer thousands more in SDLT alone, on top of the higher purchase price itself.
A third mistake: forgetting the 14-day filing deadline after completion. Your solicitor typically handles this, but late filing carries automatic penalties, so confirming it's been submitted is worth a direct check.
Where This Calculator Has Limits
It covers standard England/Northern Ireland SDLT — Scotland (Land and Buildings Transaction Tax) and Wales (Land Transaction Tax) use entirely different bands and thresholds, not simple variations of the SDLT structure. It also doesn't calculate the 17% flat rate that applies to companies purchasing residential property above £500,000, or reliefs for mixed-use and multiple-dwelling transactions.
Frequently Asked Questions
Is Stamp Duty the same across the whole UK?
No — SDLT applies only in England and Northern Ireland. Scotland and Wales have their own separate taxes with different rates and thresholds.
Does first-time buyer relief apply if I'm buying with someone who's owned before?
No — every buyer named on the purchase must be a first-time buyer for the relief to apply at all.
When exactly is SDLT due?
Within 14 days of completion — your solicitor typically files and pays it on your behalf as part of conveyancing.
Can I get a refund if I sell my old home after buying the new one?
Yes, if you paid the additional-property surcharge and sell your previous main residence within 36 months, you can apply for a refund within 12 months of that sale.
Does SDLT apply to leasehold as well as freehold?
Yes — both freehold and leasehold purchases above the threshold are subject to SDLT, with a slightly different calculation for the rental element of long leases.
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Educational content, not financial or tax advice. SDLT rates, thresholds, and surcharges are set by HMRC and can change with each Budget — confirm current figures at gov.uk or with a licensed conveyancer before completion. Written by the MortgagePro Global team; rates referenced against thresholds in force since 1 April 2025.