How to Use a Stamp Duty Calculator: UK Buyer’s Guide 2026
Property purchase tax in the UK is calculated differently depending on where you are buying, what you are buying, and your circumstances as a buyer. A stamp duty calculator handles that complexity automatically, but only if you put the right information in. This guide explains each input the calculator needs, how it affects your result, and how to read the breakdown it returns.
The rates below reflect the position as of 2026. No further changes have been announced since April 2025.
What a Stamp Duty Calculator Actually Does
The UK does not have one single property purchase tax. There are three separate systems depending on location:
- England and Northern Ireland — Stamp Duty Land Tax (SDLT), administered by HMRC
- Scotland — Land and Buildings Transaction Tax (LBTT), administered by Revenue Scotland
- Wales — Land Transaction Tax (LTT), administered by the Welsh Revenue Authority
Each system uses a banded structure, meaning you pay different rates on different portions of the purchase price, not a single rate on the whole amount. That distinction matters a great deal when you are budgeting. A calculator applies each band in order and returns the total, along with a line-by-line breakdown showing where each part of the bill comes from.
The stamp duty calculator on this site covers all three systems. You select the location, enter the price, and tell it your buyer type. The rest is automatic.
The Four Inputs That Determine Your Result
1. Purchase price
Enter the full price you expect to pay. If the price has not been agreed yet, you can run the calculator at different values to see how the tax changes across price points. This is useful at the offer stage, particularly when a property is close to a threshold where the rate changes.
Enter the price without rounding. A property at £499,999 and one at £500,000 produce different results for a first-time buyer in England, because the £500,000 mark is where first-time buyer relief cuts out entirely.
2. Location
Select the country where the property is located, not where you live. Tax is based on the location of the property. A buyer living in Edinburgh who purchases a flat in Manchester pays SDLT, not LBTT.
The three calculators on this site are:
3. Buyer type
This is the input that most significantly changes your bill. There are three categories:
- First-time buyer — you have never owned freehold or leasehold interest in a residential property anywhere in the world. This includes inherited property, even if you sold it immediately after inheriting. All buyers named on a joint purchase must meet this definition.
- Replacing a main residence — you already own a property and are selling it to fund this purchase as your new primary home. You pay standard rates.
- Additional property — you will own more than one residential property after this purchase completes. This includes buy-to-let, second homes, and holiday homes.
Selecting the wrong buyer type is the most common cause of a calculator giving an unexpected figure. If you are unsure which applies, run the calculator under more than one option to see the difference.
4. UK residency (England and Northern Ireland only)
Non-UK residents purchasing residential property in England or Northern Ireland pay a 2% surcharge on top of all other rates. This was introduced in April 2021 and stacks with any other surcharge that applies. A non-UK resident purchasing an additional property in England could pay up to 19% on the highest band.
How the Banded System Works
Every property purchase tax in the UK works on a marginal basis. You only pay each rate on the portion of the price that falls within that band. A common misunderstanding is that falling into a higher band means paying that rate on the full purchase price. It does not.
Take a straightforward example. A standard buyer in England purchasing a property for £350,000 in 2026:
| Band | Rate | Tax on this portion |
|---|---|---|
| £0 to £125,000 | 0% | £0 |
| £125,001 to £250,000 | 2% | £2,500 |
| £250,001 to £350,000 | 5% | £5,000 |
| Total | £7,500 |
The effective rate on that purchase is 2.14%, not 5%. The calculator shows this breakdown automatically so you can see exactly how the total is reached rather than just receiving a single figure.
Current Rates by Region
England and Northern Ireland — SDLT 2026
The rates in force from 1 April 2025, and applying throughout 2026, are:
| Purchase price band | Standard rate | First-time buyer rate | Additional property rate |
|---|---|---|---|
| Up to £125,000 | 0% | 0% | 5% |
| £125,001 to £250,000 | 2% | 0% | 7% |
| £250,001 to £300,000 | 5% | 0% | 10% |
| £300,001 to £500,000 | 5% | 5% | 10% |
| £500,001 to £925,000 | 5% | Standard rates | 10% |
| £925,001 to £1,500,000 | 10% | Standard rates | 15% |
| Over £1,500,000 | 12% | Standard rates | 17% |
Source: HMRC. First-time buyer relief applies only where the purchase price does not exceed £500,000. The additional dwelling surcharge of 5 percentage points applies from 31 October 2024.
Use the England and Northern Ireland SDLT calculator for a full breakdown at your purchase price.
Scotland — LBTT 2026
Scotland's Land and Buildings Transaction Tax uses different bands to SDLT. The standard nil-rate threshold is £145,000. First-time buyers benefit from a raised threshold of £175,000. The Additional Dwelling Supplement (ADS) is 8% of the full purchase price, applied on top of standard LBTT, for transactions completing on or after 5 December 2024.
| Purchase price band | Standard LBTT rate |
|---|---|
| Up to £145,000 | 0% |
| £145,001 to £250,000 | 2% |
| £250,001 to £325,000 | 5% |
| £325,001 to £750,000 | 10% |
| Over £750,000 | 12% |
Source: Revenue Scotland. Note that Scotland's 10% band begins at £325,001, compared to £925,001 in England. For mid-to-higher value properties, buyers in Scotland typically pay more than equivalent buyers in England.
Use the Scotland LBTT calculator for a full breakdown including the ADS where applicable.
Wales — LTT 2026
Wales uses Land Transaction Tax with the highest nil-rate threshold in the UK at £225,000. There is no first-time buyer relief scheme in Wales, though the high threshold means most first-time buyers will pay nothing. For additional properties, Wales applies a completely separate set of higher rate bands rather than a flat surcharge. Those higher rates were updated on 11 December 2024.
| Purchase price band | Standard LTT rate |
|---|---|
| Up to £225,000 | 0% |
| £225,001 to £400,000 | 6% |
| £400,001 to £750,000 | 7.5% |
| £750,001 to £1,500,000 | 10% |
| Over £1,500,000 | 12% |
Source: Welsh Revenue Authority.
Use the Wales LTT calculator for standard and higher-rate figures.
Situations That Change Your Calculation
Buying before selling your existing home
If you have not yet sold your current home when you complete on a new purchase, you will temporarily own two properties. The calculator will show you the higher additional-dwelling rate in this scenario.
If you sell your previous main residence within 36 months of the new purchase completing, you can claim a refund of the surcharge from HMRC. The claim must be made within 12 months of the sale of the old property, or within 12 months of the SDLT filing date, whichever is later. The stamp duty refund page explains the process and eligibility criteria in full.
Joint purchases and first-time buyer status
All buyers named on the transaction must individually meet the definition of a first-time buyer for the relief to apply. If one buyer has previously owned a residential property anywhere in the world, neither buyer qualifies. The calculator applies standard rates automatically in this scenario.
Properties above £500,000 for first-time buyers
First-time buyer relief in England and Northern Ireland does not apply at all if the purchase price exceeds £500,000. Standard rates apply to the full amount from the first pound. The calculator handles this switch automatically, but it is worth being aware of it when comparing properties on either side of that threshold.
Modelling a price negotiation
The calculator is useful beyond just checking a single figure. If you are negotiating and considering whether to push for a lower price, you can run the calculator at both values to see how much SDLT changes. Near key thresholds, a relatively small reduction in price can produce a meaningful reduction in tax.
Reading the Calculator Breakdown
The calculator on this site returns more than a single total. It shows:
- The tax owed on each individual band of the purchase price
- The total tax payable
- The effective rate (total tax as a percentage of the purchase price)
The effective rate is the most useful figure for comparing properties at different price points or for understanding what proportion of your purchase cost is going in tax. Because the system is marginal, the effective rate is always lower than the highest band rate that applies to your purchase.
What the Calculator Does Not Cover
For most straightforward residential purchases, the calculator gives you an accurate figure. There are specific circumstances where the result may differ from the final amount your solicitor calculates:
- New leases with high ground rent. Where the net present value of the lease's rent element exceeds £250,000, additional SDLT may apply to the rent separately from the purchase price element.
- Mixed-use properties. Where a property has both residential and commercial elements, non-residential SDLT rates may apply. These are generally lower and do not carry the additional dwelling surcharge.
- Shared ownership. Buyers can elect to pay SDLT on the full market value upfront, or pay on each tranche as they staircase. The most appropriate structure depends on individual circumstances.
- Company purchases above £500,000. Corporate buyers purchasing residential property for more than £500,000 face a flat 17% SDLT rate, subject to specific reliefs.
If any of these apply to your purchase, your solicitor will confirm the correct calculation.
Frequently Asked Questions
Does stamp duty apply to all property purchases in the UK?
No. All three systems have nil-rate thresholds below which no tax is payable. In England and Northern Ireland the threshold is £125,000 for standard buyers. In Scotland it is £145,000. In Wales it is £225,000. Purchases below these amounts attract no property purchase tax.
I'm buying jointly with my partner. Do we both have to be first-time buyers?
Yes. For a joint purchase to qualify for first-time buyer relief in England and Northern Ireland, every buyer named on the transaction must be a first-time buyer. If either of you has previously owned a residential property anywhere in the world, neither of you qualifies and standard rates apply to the full purchase price.
I'm buying a new home before selling my current one. Will I pay the surcharge?
Yes, at the point of completion you will be treated as owning an additional property and the surcharge applies. However, if you sell your previous main residence within 36 months, you can claim a full refund of the surcharge. See the stamp duty refund page for details on how to claim.
Does the calculator work for Scotland and Wales?
Yes. The calculator covers SDLT for England and Northern Ireland, LBTT for Scotland via the Scotland calculator, and LTT for Wales via the Wales calculator. Each uses the correct rates, bands, and surcharges for that jurisdiction.
The calculator shows a higher rate than I expected. Why?
The most common reason is buyer type. If the calculator is set to additional property rather than first-time buyer or standard, it will include the surcharge. Check that your buyer type is set correctly. Also confirm you have selected the right region, since LBTT in Scotland and LTT in Wales use different band structures to England.
When does stamp duty have to be paid?
In England and Northern Ireland, SDLT must be paid and the return filed with HMRC within 14 days of completion. In Scotland, the LBTT return is due within 30 days. In Wales, the LTT return is also due within 30 days. In practice, your solicitor handles the return and payment as part of the conveyancing process.
Are the rates on this site up to date?
Yes. The calculator and rate tables reflect the rates in force in 2026, following the April 2025 reversion of SDLT thresholds in England and Northern Ireland and the December 2024 changes in Scotland and Wales. The site is updated whenever rates change.
Disclaimer: The figures produced by this calculator are estimates based on the information you enter and the rates in force at the time of calculation. They are not a substitute for legal or tax advice. Always confirm the final stamp duty amount with your solicitor or licensed conveyancer before completion.
Written by Ali Walton. Last updated June 2026.
Ali Walton
Ali Walton writes clear, practical UK property tax guides for buyers, homeowners, and investors using current stamp duty, SDLT, LBTT, and LTT rules.