If you believe you have overpaid Stamp Duty Land Tax (SDLT), you can claim a refund either on your own or through an authorised tax agent. HMRC aims to process most refund claims within 15 working days when all required documentation is submitted correctly online or by post.
That said, processing can stretch to several months in busier periods or where HMRC needs to review the claim more closely. In some cases, taxpayers have reported delays of up to 9 months, particularly where claims involve complex reliefs or higher-value transactions. Submitting accurate documentation from the outset is the single most important step you can take to speed up your refund.
Many UK homeowners and property investors continue to overpay SDLT each year, often because of incorrect classifications around mixed use property, derelict properties, or higher rate surcharges. If you are one of those who has overpaid Stamp Duty and may be entitled to a refund, the reclaim process follows a clear set of steps.
If your overpayment was caused by negligent advice from a conveyancer or solicitor, and the HMRC time limit for reclaiming directly has passed, you may have grounds for a professional negligence claim. Such legal actions are intended to recover losses caused by errors or omissions during the property purchase, and would be pursued through the civil courts with supporting evidence and legal representation.
1. Check if You Are Eligible for an SDLT Refund
The first step is confirming whether you actually qualify for a Stamp Duty Land Tax (SDLT) refund. This is the part of the process where both you and your tax adviser have the most control.
The more accurate information you provide upfront, the faster your adviser can assess whether a refund is owed and estimate the likely amount. Key details to share include:
- The date the property was purchased
- The total amount paid for the property
- How the property was purchased (cash, mortgage, company, trust)
- Full specifications of the property, including condition and use
A common ground for refund is the higher rate surcharge on additional properties. If you bought a new main residence before selling your previous one and paid the 5% surcharge (increased from 3% on 31 October 2024), you can reclaim it provided you sell your previous main residence within 36 months of the new purchase.
Most reputable advisers will respond with an initial eligibility assessment within 48 hours, provided all information is supplied correctly.
2. Preparing the Written Report for HMRC
If a refund is genuinely due, your adviser will prepare a written report for HMRC explaining why the refund is owed, what errors led to the overpaid Stamp Duty, and what amendments are needed to the original SDLT return filed by your solicitor. Under standard service levels, this stage is usually completed within 72 hours.
The report typically includes the Unique Transaction Reference Number (UTRN) from your original SDLT5 certificate, completion statements for both the purchase and any related sale, and supporting evidence specific to the relief being claimed.
3. Wait for a Response from HMRC
Once the report is submitted, the timeline shifts to HMRC. Online claims are usually processed in 4 to 6 weeks, while postal claims can take 8 to 12 weeks. Several factors affect how quickly your case is handled:
- The time of year and HMRC workload
- The current state of the UK property market
- The type of property involved
- The complexity of the transaction
- The location of the property
HMRC has been operating at increased capacity following well documented service pressures in recent years. Where claims are flagged for closer review, processing can extend to 6 months or more. A reliable SDLT adviser should provide three core assurances:
- They handle the entire claim process on your behalf
- They follow up with HMRC for regular updates
- No fees are charged until your refund is received
It is also worth noting that under the current rules, HMRC operates a “process now, check later” approach. This means refunds are often issued quickly, but HMRC retains 9 months from the date of the claim to open an enquiry and request the money back with interest if they later decide the refund was not properly due.
Who Is Liable to Pay SDLT?
Stamp Duty Land Tax is paid by the buyer on the purchase of residential property, commercial property, or mixed use property in England and Northern Ireland. The legal responsibility to file an SDLT return and pay the tax sits with the purchaser, not the seller.
Buyers must submit the SDLT return and pay any tax due within 14 days of the effective date of the transaction (usually the completion date). Failing to file or pay on time can lead to penalties and interest charges, which is why understanding the correct rates and any applicable surcharges before completion is critical.
What Is Stamp Duty Land Tax Payable On?
SDLT applies to land and property purchases in England and Northern Ireland. It is calculated as a percentage of the purchase price, with rates varying depending on the buyer category and property type. (In Scotland, buyers pay Land and Buildings Transaction Tax (LBTT), and in Wales, Land Transaction Tax (LTT) instead.)
As of April 2025, the SDLT thresholds reverted to their pre-2022 levels, and these rates continue to apply throughout 2026:
- Standard residential buyers: 0% up to £125,000, then 2% up to £250,000, 5% up to £925,000, 10% up to £1.5 million, and 12% above £1.5 million.
- First time buyers: 0% up to £300,000 and 5% on the portion between £300,001 and £500,000. No relief applies if the property exceeds £500,000.
- Additional properties (second homes, buy to let): A 5% surcharge applies on top of the standard rates from the first pound, increased from 3% on 31 October 2024.
- Non-UK residents: A further 2% surcharge applies on top of all other rates.
- Companies and non-natural persons purchasing residential properties over £500,000 face a 17% flat rate (increased from 15% in October 2024).
These changes mean more buyers fall within the SDLT net than during the temporary higher thresholds, and the scope for overpayment, especially through misclassification, has grown.
How Quickly Do You Get Stamp Duty Refunded?
When HMRC has all the required documentation and the claim is straightforward, refunds are typically processed within 15 working days. If the case is more complex, processing can take several weeks or months. Once the refund is settled, you are entitled to interest on the overpaid amount, although you cannot claim compensation for the time taken.
Conclusion
The SDLT refund timeline can feel uncertain, but for genuine overpayments the wait is usually well worth it. With refunds often running into thousands or tens of thousands of pounds, securing professional support early in the process can mean the difference between a smooth claim and one that drags on for months. If you suspect you have overpaid Stamp Duty Land Tax, acting within HMRC’s strict time limits is essential.
Frequently Asked Questions on SDLT Refunds
How do I know if I have overpaid Stamp Duty Land Tax?
Review your SDLT5 certificate and conveyancing paperwork, then check whether reliefs such as first time buyer relief, mixed use treatment, or replacement of main residence rules were correctly applied. A specialist SDLT adviser can review your case and confirm whether a claim is viable.
What are the options for making an SDLT refund claim?
You can submit the claim yourself directly to HMRC, ask your conveyancer to do it, or instruct an authorised tax agent who specialises in SDLT to manage the process on your behalf.
What is the expected timeline for an SDLT refund claim?
HMRC aims to process straightforward claims within 15 working days. Online claims are typically resolved in 4 to 6 weeks, postal claims in 8 to 12 weeks, and complex cases can take up to 6 months or longer.
What documents are needed to support a Stamp Duty refund claim?
You will usually need your SDLT5 certificate (with UTRN), completion statements for the purchase and any related sale, proof of payment, identification documents, and any evidence specific to the relief being claimed.
Can I submit my SDLT refund claim online?
Yes. HMRC offers an online service for refund claims of the higher rate surcharge and the 2% non-UK resident surcharge. Other refund claims must be submitted by post to BT Stamp Duty Land Tax, HM Revenue and Customs, BX9 1HD.
Are there any fees associated with making a Stamp Duty refund claim?
HMRC does not charge for processing a refund claim. If you instruct a tax adviser, they may charge a fixed fee or a percentage of the recovered amount. Always confirm fees and terms in writing before instructing anyone.
What should I do if my SDLT refund claim is rejected?
You can request a review by HMRC or appeal the decision to the First Tier Tax Tribunal. A specialist SDLT adviser or tax barrister can assess the strength of an appeal before you proceed.
Can I get professional help with my SDLT refund?
Yes. Engaging a regulated tax agent or chartered tax adviser experienced in SDLT often improves the accuracy of the claim and helps avoid common pitfalls such as missed deadlines or incomplete documentation.
Is there a time limit for making an SDLT claim?
Yes. The general deadline is 12 months from the filing date of the original SDLT return (which is 14 days after completion). For the higher rate surcharge, the deadline is the later of 12 months from the sale of your previous main residence or 12 months and 14 days from filing the original return. For mixed use or overpayment relief claims, the limit is 4 years from the effective date of the transaction.
Where can I find more information about Stamp Duty refund claims?
Detailed guidance is available on the official HMRC website at gov.uk, or by speaking with a qualified SDLT specialist who can review your specific circumstances and confirm whether a claim is viable.
