Guide · 10 min read
Stamp duty, explained.
Three nations, three taxes, three different sets of rules. Here's how it actually works — and the corners where buyers most often misread the bill.
It's a tax, but not the tax you think
The first thing to understand: "stamp duty" isn't one tax. It's a colloquial label for three legally separate taxes administered by three different bodies.
- England & Northern Ireland — Stamp Duty Land Tax (SDLT), administered by HMRC.
- Scotland — Land and Buildings Transaction Tax (LBTT), administered by Revenue Scotland since April 2015.
- Wales — Land Transaction Tax (LTT), administered by the Welsh Revenue Authority since April 2018.
The rates differ. The thresholds differ. The reliefs differ. A property in Cardiff and a property in Bristol at the same price can attract very different bills. Anyone quoting you a single "stamp duty rate" is almost certainly talking about SDLT, which applies only in England and Northern Ireland.
How banded ("marginal") rates work
All three taxes use a banded structure. You don't pay the headline rate on the entire purchase price — you pay each rate only on the slice of price that falls within its band.
This trips people up constantly. On an English property of £300,000 you do not pay 5% of £300,000. You pay 0% on the first £125,000, 2% on the next £125,000 (£2,500), and 5% only on the final £50,000 (£2,500). Total bill: £5,000, not £15,000.
The cliff-edge problem that plagued the old stamp duty system — where crossing a threshold by £1 could add thousands to your bill — was abolished in December 2014 when HMRC moved to a marginal-rate structure. Today, crossing a band boundary costs you exactly the rate on each additional pound, nothing more.
England (SDLT) bands
Standard residential rates from 1 April 2025:
| Portion of price | Rate |
|---|---|
| Up to £125,000 | 0% |
| £125,001 – £250,000 | 2% |
| £250,001 – £925,000 | 5% |
| £925,001 – £1,500,000 | 10% |
| Over £1,500,000 | 12% |
First-time buyer relief (England)
If you and any joint buyer have never owned a residential property anywhere in the world, the nil-rate band rises to £300,000, and 5% then applies between £300k and £500k. Crucially, the relief disappears entirely above £500,000. Buy a first home for £500,001 and you're back on standard rates from the first pound — so the tax jump at that threshold can be significant.
Second home / additional property surcharge (England)
From 31 October 2024, the surcharge for additional residential properties increased from 3% to 5 percentage points on every band. It applies where the property costs £40,000 or more and the other higher-rate conditions are met. A £300,000 buy-to-let attracts 5% on the first £125k (£6,250), 7% on the next £125k (£8,750) and 10% on the final £50k (£5,000), giving a total of £20,000 — where a standard purchase would pay £5,000.
Worked examples — England
Example 1: Standard buyer purchasing £350,000
A straightforward move to illustrate how the bands stack:
- First £125,000 at 0% = £0
- Next £125,000 at 2% = £2,500
- Remaining £100,000 at 5% = £5,000
- Total SDLT: £7,500
Now apply first-time buyer relief to the same £350,000 purchase. The first-time buyer nil-rate band extends to £300,000, so only the final £50,000 is taxed, at 5%. Total SDLT: £2,500. The relief saves this buyer £5,000.
Example 2: Same £350,000 property as a second home
With the additional-property surcharge of 5% added to every band:
- First £125,000 at (0% + 5%) = £6,250
- Next £125,000 at (2% + 5%) = £8,750
- Remaining £100,000 at (5% + 5%) = £10,000
- Total SDLT: £25,000
That's £25,000 versus £7,500 for the same property — a £17,500 surcharge premium. The higher rates reflect the government's policy aim of discouraging investment purchases from crowding out residential buyers.
Scotland (LBTT) bands
Scotland's nil-rate threshold starts lower (£145,000), but the higher bands kick in earlier too:
| Portion of price | Rate |
|---|---|
| Up to £145,000 | 0% |
| £145,001 – £250,000 | 2% |
| £250,001 – £325,000 | 5% |
| £325,001 – £750,000 | 10% |
| Over £750,000 | 12% |
First-time buyers in Scotland get a raised nil-rate band of £175,000 — a saving of up to £600 versus the standard rates.
The Additional Dwelling Supplement (ADS) is the Scottish equivalent of the English surcharge, and it works very differently: 8% on the entire consideration in addition to the standard banded LBTT. It applies where the consideration is £40,000 or more and the other ADS conditions are met. It rose from 6% to 8% on 5 December 2024. On a £200,000 Scottish investment property, that's a flat £16,000 ADS on top of any banded LBTT.
Wales (LTT) bands
Wales has a £225,000 standard residential nil-rate threshold and does not offer first-time buyer relief.
| Portion of price | Rate |
|---|---|
| Up to £225,000 | 0% |
| £225,001 – £400,000 | 6% |
| £400,001 – £750,000 | 7.5% |
| £750,001 – £1,500,000 | 10% |
| Over £1,500,000 | 12% |
Higher residential rates for additional properties in Wales use a separate band table, not a surcharge added to the standard rates. For qualifying purchases of £40,000 or more, the rates from 11 December 2024 start at 5% on the first band, then rise through 8.5%, 10%, 12.5%, 15%, and 17%.
Common mistakes
Thinking a single pound across a threshold doesn't matter
It matters less than people think. Because rates are banded, crossing £250,001 in England costs you 5p on that one extra pound, not £12,500. The "cliff edges" that created distortions in the market were abolished in December 2014. The only remaining true cliff edge is the first-time buyer relief at £500,000 in England — above that price, the entire relief vanishes.
Forgetting that "previously owned" means anywhere in the world
If you own a holiday flat in Spain, you are not a first-time buyer for SDLT or LBTT purposes — and you may owe the additional-property surcharge on a UK purchase. Properties you have inherited also count as previously owned property. The test is whether you have ever had a major interest in a dwelling anywhere in the world, not just in the UK.
Ignoring the second-home rules during a chain
If you complete on a new main home before selling your old one, you will usually pay the higher rates upfront. A refund may be available if the previous main residence is sold and the other conditions are met. The standard time limit is now 36 months in England and Northern Ireland, Scotland, and Wales; Scotland's period changed from 18 to 36 months for transactions from 1 April 2024. Check the rules for the relevant tax because the detailed conditions and claim procedures differ.
Missing the non-residential rates for mixed-use property
Residential property and commercial property attract different SDLT rates. If a purchase includes both a dwelling and a commercial element — a farmhouse with agricultural land, or a shop with a flat above it — the property may qualify for non-residential rates, which can be significantly lower. This is worth exploring with a solicitor before exchange.
When to take advice
SDLT Multiple Dwellings Relief was abolished for transactions completing from 1 June 2024, subject to limited transitional rules for certain earlier contracts. Scotland and Wales have their own rules for multiple-dwelling transactions. HMRC also states that there is no SDLT relief or lower rate simply because a property is described as uninhabitable; only a very limited number of buildings are genuinely not suitable for use as a dwelling. Shared ownership, annexes, corporate purchases, mixed-use property, linked transactions, and unusual property condition can all require case-specific treatment, so consider advice from a qualified tax adviser or conveyancer.
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