How Is Stamp Duty Calculated?
A Step-by-Step Breakdown of the UK Tiered System
Quick Answer: Stamp duty is calculated using a tiered system. Different portions of the price are taxed at different rates - you never pay the top rate on the whole amount.
Key Takeaways
- Stamp duty uses a tiered system - you only pay higher rates on the portion above each threshold, not the entire price
- A standard buyer pays nothing on the first £125,000, then 2% up to £250,000, 5% up to £925,000, and higher rates above that
- First-time buyers get a bigger nil-rate band of £300,000, saving up to £6,250 compared to standard buyers
- Second home and buy-to-let purchases attract a 5% surcharge on top of every band
- Scotland (LBTT) and Wales (LTT) have their own separate rate bands and thresholds
In this article
The Tiered System Explained
Stamp Duty Land Tax (SDLT) works much like income tax: different slices of the purchase price are taxed at different rates. This is sometimes called a "progressive" or "slab" system.
The key point is that you never pay the highest rate on the entire price. If your property costs £300,000, only the portion above £250,000 is taxed at the 5% rate - the first £250,000 is taxed at lower rates (or not at all).
Think of It Like Filling Buckets
Imagine the purchase price as water flowing into a series of buckets. The first bucket (£0 to £125,000) is "free" - no tax. Once that overflows, water fills the next bucket (£125,001 to £250,000) at 2%. Each subsequent bucket has a higher rate. You only pay the rate for each bucket on the amount that sits in it.
Use our stamp duty calculator to see the exact band-by-band breakdown for any property price, or read our comprehensive guide for a deeper explanation of every edge case.
Worked Example: £300,000 Property
Here is how SDLT is calculated step by step for a standard buyer purchasing a £300,000 property in England (post-April 2025 rates):
| Band | Rate | Taxable Amount | Tax Due |
|---|---|---|---|
| £0 - £125,000 | 0% | £125,000 | £0 |
| £125,001 - £250,000 | 2% | £125,000 | £2,500 |
| £250,001 - £300,000 | 5% | £50,000 | £2,500 |
| Total Stamp Duty | £300,000 | £5,000 | |
The effective rate on a £300,000 property is just 1.67% - far lower than the 5% band rate. This is because most of the price falls within the 0% and 2% bands.
For more worked examples at different price points, see our £300,000 stamp duty scenario.
Current England SDLT Rates (2025-26)
These are the standard residential SDLT rates in England and Northern Ireland, effective from 1 April 2025. See the full rate tables for 2026 for all buyer types.
| Property Price Band | SDLT Rate |
|---|---|
| £0 - £125,000 | 0% |
| £125,001 - £250,000 | 2% |
| £250,001 - £925,000 | 5% |
| £925,001 - £1,500,000 | 10% |
| Over £1,500,000 | 12% |
How It Differs for First-Time Buyers
First-time buyers benefit from a higher nil-rate threshold, meaning they pay no stamp duty on a larger portion of the price:
- £0 to £300,000: 0% (compared to £125,000 for standard buyers)
- £300,001 to £500,000: 5%
- Over £500,000: FTB relief does not apply; standard rates are used instead
FTB Saving Example: £300,000 Property
Use the first-time buyer calculator to see your exact figure.
Second Homes and Buy-to-Let
If you already own a property and are buying an additional one (second home, holiday let, or buy-to-let), a 5% surcharge is added to every band. This means:
- The 0% band becomes 5%
- The 2% band becomes 7%
- The 5% band becomes 10%
- And so on up the scale
Second Home Example: £300,000 Property
You may be able to claim a refund of the surcharge if you sell your previous main residence within 36 months. Learn more about the second home surcharge rules.
Scotland and Wales: Different Systems
While the tiered principle is the same, Scotland and Wales have their own rates and thresholds:
Scotland - LBTT
Land and Buildings Transaction Tax starts with a £145,000 nil-rate band. Rates are 2% (£145,001 to £250,000), 5% (£250,001 to £325,000), 10% (£325,001 to £750,000), and 12% above £750,000. The Additional Dwelling Supplement is 8%.
Wales - LTT
Land Transaction Tax has a £225,000 nil-rate band for main residences. Rates are 6% (£225,001 to £400,000), 7.5% (£400,001 to £750,000), 10% (£750,001 to £1,500,000), and 12% above £1,500,000.
Common Mistakes People Make
Thinking it is a flat rate
The most common misunderstanding. If the 5% band applies to part of your purchase, that does not mean you pay 5% on the whole price. Only the portion within that band is taxed at 5%.
Forgetting the second home surcharge
Buyers who already own property often overlook the 5% surcharge when budgeting. On a £300,000 property, this adds £15,000 to the stamp duty bill.
Using pre-April 2025 rates
The nil-rate threshold dropped from £250,000 to £125,000 in April 2025 and the FTB threshold dropped from £425,000 to £300,000. Always check you are using current figures. See the full April 2025 changes.
Applying England rates to Scotland or Wales
Each nation has its own tax with different bands. A £300,000 property costs different amounts in stamp duty depending on whether it is in England, Scotland, or Wales.
Frequently Asked Questions
Is stamp duty a flat rate or tiered?
Tiered. Each portion of the price that falls within a specific band is taxed at that band's rate. This is the same principle as UK income tax brackets. The effective rate you pay is always lower than the highest band rate that applies to your purchase.
How do I calculate stamp duty on a £300,000 property?
For a standard buyer: £0 on the first £125,000, £2,500 on the next £125,000 (at 2%), and £2,500 on the final £50,000 (at 5%). Total: £5,000. A first-time buyer would pay £0. Use our calculator for instant results at any price.
Do first-time buyers pay less stamp duty?
Yes. First-time buyers pay nothing on the first £300,000 (versus £125,000 for other buyers). On a property between £300,001 and £500,000, the saving can be up to £6,250. Properties over £500,000 do not qualify for FTB relief.
Is stamp duty calculated differently in Scotland and Wales?
Yes. Scotland charges LBTT with a £145,000 nil-rate band and an 8% Additional Dwelling Supplement. Wales charges LTT with a £225,000 nil-rate band. Both use tiered systems but with completely different rate bands from England's SDLT.
Does the non-resident surcharge stack with the second home surcharge?
Yes. Non-UK residents pay a 2% surcharge on top of all other rates. If you are a non-resident buying a second home, you would pay the standard rate plus 5% (additional property) plus 2% (non-resident) on each band. On a £300,000 second home, a non-resident would pay £26,000 in total.
Ready to see your numbers?
Use our free calculator to see exactly how much stamp duty you need to budget for.
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Emma Richardson, MRICS
Chartered Surveyor & Property Tax Specialist
Emma Richardson is a RICS-qualified Chartered Surveyor with over 12 years of experience in UK property taxation. She founded Stamp Duty Calculator to help buyers understand the complex world of property transaction taxes.
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