Stamp Duty Land Tax (SDLT) is one of the largest upfront costs when buying property in England or Northern Ireland, and it needs to be factored into your budget from the outset. The calculator above provides an estimated SDLT figure based on the property price, buyer type and location you select. The guide below explains how SDLT is calculated, the current rate bands, reliefs available to first-time buyers, and the additional surcharges that apply to second homes, buy-to-let purchases and non-UK residents. SDLT rules are set by HM Revenue and Customs, and buyers should always confirm their final liability with a qualified solicitor before completion.

For a free initial consultation on your property purchase, call 01202 155992 or contact Mortgage One.

How Stamp Duty Land Tax Works

SDLT is a tax charged on the purchase of residential property and land in England and Northern Ireland. It is calculated on a progressive slice basis, meaning different portions of the purchase price are taxed at different rates — similar to income tax bands. You do not pay a single flat rate on the entire purchase price.

The amount of SDLT you owe depends on the purchase price, whether you are a first-time buyer, whether the property will be your only residence, and whether you are a UK resident. Your solicitor or conveyancer will normally calculate the SDLT, submit the return to HMRC and arrange payment from the completion funds. The return must be filed and the tax paid within 14 days of completion.

Current SDLT Rates for Residential Property

The following rate bands apply to residential property purchases in England and Northern Ireland from 1 April 2025. These rates replaced the temporary higher thresholds that were in place from September 2022 to March 2025.

Standard rates (main residence):

•       0% on the first £125,000

•       2% on the portion from £125,001 to £250,000

•       5% on the portion from £250,001 to £925,000

•       10% on the portion from £925,001 to £1,500,000

•       12% on any amount above £1,500,000

As an example, a main residence purchase at £350,000 would attract SDLT of £7,500: zero on the first £125,000, £2,500 on the next £125,000 at 2%, and £5,000 on the remaining £100,000 at 5%.

First-Time Buyer Relief

First-time buyers purchasing a property in England or Northern Ireland benefit from a separate, more generous nil-rate band. To qualify, you (and anyone you are buying with) must never have previously owned a freehold or leasehold interest in a residential property anywhere in the world.

First-time buyer rates:

•       0% on the first £300,000

•       5% on the portion from £300,001 to £500,000

First-time buyer relief is not available where the purchase price exceeds £500,000. In that case, standard rates apply on the full purchase price with no first-time buyer discount.

For a first-time buyer purchasing at £400,000, the SDLT liability would be £5,000: zero on the first £300,000, and £5,000 on the remaining £100,000 at 5%. Understanding how SDLT interacts with your overall budget — alongside your mortgage deposit and other purchase costs — is an important part of planning a first-time buyer mortgage.

To discuss how stamp duty fits into your purchase budget, call 01202 155992 or contact Mortgage One.

Additional Property Surcharge

If you are purchasing an additional residential property — such as a second home, a buy-to-let investment or a holiday let — a 5% surcharge applies on top of the standard SDLT rates across the full purchase price. This surcharge was increased from 3% to 5% on 31 October 2024.

For example, on a £300,000 additional property purchase, the SDLT calculation would be: standard SDLT of £5,000 (zero on the first £125,000, £2,500 at 2% on the next £125,000, and £2,500 at 5% on the remaining £50,000), plus the 5% surcharge of £15,000, giving a total SDLT liability of £20,000.

The surcharge applies even if you own property overseas. There is an exemption if you are replacing your main residence — meaning you are selling one home and buying another to live in. However, if the replacement does not complete within the required timeframe, the surcharge must be paid upfront and can then be reclaimed within three years if the previous main residence is subsequently sold.

This increased surcharge has a material impact on the upfront cost of buy-to-let and second home mortgages. It should be factored into your cash requirement alongside the deposit, legal fees and any other purchase costs.

Non-UK Resident Surcharge

Non-UK residents purchasing residential property in England or Northern Ireland pay an additional 2% surcharge on top of all other applicable SDLT rates. For SDLT purposes, you are a non-UK resident if you have not been present in the UK for at least 183 days during the 12 months before the purchase.

This surcharge is cumulative. A non-UK resident buying an additional property would pay the standard SDLT rates, plus the 5% additional property surcharge, plus the 2% non-resident surcharge. On a £400,000 additional property, for example, the combined surcharges alone would total £28,000 before the standard SDLT bands are applied.

For expats buying UK property while living abroad, this surcharge is an important consideration when budgeting. Mortgage One works with borrowers on expat mortgages and can advise on how the surcharge interacts with your overall purchase funding.

Practical Considerations When Budgeting for SDLT

When planning a property purchase, several practical points around SDLT are worth keeping in mind.

•       SDLT is payable on completion, not exchange. Your solicitor will arrange payment from the completion funds, but you need to ensure the money is available. If you are funding SDLT from savings rather than borrowing, confirm the amount early so there are no shortfalls on the day.

•       SDLT cannot normally be added to your mortgage. Most lenders will not allow you to borrow additional funds specifically to cover SDLT. It must come from your own resources, which means your total cash requirement is the deposit plus SDLT plus legal and other fees.

•       SDLT rules differ in Scotland and Wales. Scotland charges Land and Buildings Transaction Tax (LBTT) and Wales charges Land Transaction Tax (LTT), each with their own rates and thresholds. The calculator above covers England and Northern Ireland only.

•       Always confirm with your solicitor. The calculator provides an estimate based on standard scenarios. It does not account for all possible reliefs, exemptions or individual circumstances. Your solicitor or conveyancer should confirm the final SDLT liability before completion.

Understanding your total purchase costs — including SDLT, how much mortgage deposit you need, legal fees and any moving costs — is essential for setting a realistic budget. Mortgage One can help you assess your mortgage affordability alongside these upfront costs.

For expert mortgage advice and help budgeting for your property purchase, call 01202 155992 or contact Mortgage One.

• This information is a guide only and should not be relied on as a recommendation or advice that any particular mortgage is suitable for you.

• All mortgages are subject to the applicant(s) meeting the eligibility criteria of lenders.

• Make an appointment to receive mortgage advice suitable for your needs and circumstances.

• The information provided in this article is for general guidance only and does not constitute personal or regulated financial advice. If you’d like to understand what these moves could mean for you, speak to Mortgage One. We can explain your options and timings based on your specific circumstances.

• Some Buy to Let mortgages are not regulated by the Financial Conduct Authority.

FAQs

1. When do I have to pay stamp duty?

SDLT must be paid within 14 days of the completion date. Your solicitor or conveyancer will normally handle the return and payment on your behalf as part of the conveyancing process.

2. Do first-time buyers pay stamp duty?

First-time buyers pay no SDLT on properties priced up to £300,000. On properties between £300,001 and £500,000, first-time buyers pay 5% on the portion above £300,000 only. Properties above £500,000 do not qualify for first-time buyer relief and are subject to standard rates.

3. How much is the additional property surcharge?

The surcharge is 5% of the full purchase price, applied on top of the standard SDLT rates. It applies to second homes, buy-to-let properties and holiday lets. It was increased from 3% to 5% on 31 October 2024.

4. Can I add stamp duty to my mortgage?

Most lenders will not allow you to borrow additional funds specifically to cover SDLT. It normally needs to be paid from your own savings or other resources alongside your deposit and legal fees.

5. Does stamp duty apply in Scotland and Wales?

No. Scotland has its own Land and Buildings Transaction Tax (LBTT) and Wales has Land Transaction Tax (LTT). Each has different rates and thresholds. The SDLT rates and calculator on this page apply to England and Northern Ireland only.

6. Do I pay extra stamp duty if I live abroad?

Yes. Non-UK residents pay an additional 2% surcharge on top of all other applicable SDLT rates when purchasing residential property in England or Northern Ireland. You are classified as non-UK resident for SDLT purposes if you have not been present in the UK for at least 183 days in the 12 months before the purchase.

7. Can I reclaim the additional property surcharge if I sell my old home?

If you are replacing your main residence, you can apply for a refund of the 5% surcharge provided you sell your previous main residence within three years of the new purchase. Your solicitor can advise on the process and deadlines.