What is the stamp duty refund deadline?

Refunds of the 5% additional-property surcharge under the replacing-main-residence rule must be claimed within 12 months of the sale of the previous main residence (or 12 months of the SDLT return filing date, whichever is later). Non-UK resident refunds must be claimed within 2 years of completion on the new property. Other refund types (mixed-use re-classification, uninhabitable property) generally have a 12-month claim window from the date of the original return.

Stamp Duty Refund 2026

Q: Can I claim a stamp duty refund?

You can claim a stamp duty refund if you paid the 5% additional-property surcharge while replacing your main residence and you have now sold the previous residence within 3 years; if you paid the 2% non-UK resident surcharge and have become UK-resident within 2 years; if your property was classified as residential but should have been mixed-use or non-residential; or if your property was uninhabitable at the time of purchase. Claim within 12 months of the qualifying event.

How to claim money back from HMRC when you have overpaid stamp duty. Four common refund scenarios, the eligibility tests, the SDLT16 form, HMRC's online repayment service for higher rates, and the 12-month claim window. Interest is paid on refunds from the date of original payment.

Process verified May 2026

Common refund scenarios

Four reasons HMRC will refund stamp duty paid on a recent transaction.

1. Replacing main residence

You bought the new home before selling the old one. You paid the 5% additional-property surcharge on completion. Within 3 years you sell the previous main residence. You can reclaim the 5% surcharge component. The most common refund route.

2. Non-UK resident becomes UK resident

You paid the 2% non-UK-resident surcharge on completion. You then satisfy the 183-day UK residence test within 2 years of purchase (183 days in any rolling 365-day period). You can reclaim the 2% surcharge component.

3. Property mis-classified as residential

The property was originally returned as residential (residential SDLT rates apply) but in fact qualifies as mixed-use or non-residential (lower band schedule). HMRC has tightened the mixed-use rules since 2024; advisers should be confident the test is met before claiming. Successful claims usually involve a genuine commercial element on the same title (working farmland, sub-let commercial space).

4. Uninhabitable property

A property in such a state of disrepair at the date of completion that it is not suitable for use as a dwelling can fall outside the residential SDLT regime. The bar is high (severe structural defects, no kitchen or bathroom, no working services). Claims succeed when supported by a surveyor's report dated at the time of purchase.

The replacing-main-residence process step by step

This is the most common refund. Specific to the 5% additional-property surcharge in England and Northern Ireland.

1You bought the new property while still owning the previous main residence. The 5% surcharge was charged on the SDLT return at completion.
2The new property has become your main residence. (HMRC look at the facts: where do you live day-to-day, where are your family, where is your post sent, what address is on the electoral roll.)
3You sell the previous main residence within 3 years of the completion date of the new property.
4Within 12 months of the sale of the previous residence (or 12 months of the SDLT return filing date, whichever is later), apply for the refund.
5Use HMRC's online repayment service for higher rates of SDLT. You will need the UTRN from the SDLT5 certificate, both completion dates, and bank details for the payment.
6HMRC pays the refund of the 5% surcharge component (the difference between the additional-property SDLT and the standard SDLT for the same price). Interest is paid at the repayment rate from the original payment date.

SDLT16 vs the online service

HMRC supports two routes for higher-rates SDLT refunds. Use whichever is convenient; the eligibility tests are identical.

→HMRC online repayment service for higher rates of SDLT - the recommended primary route. Faster turnaround, asks for the right fields, validates UTRN against HMRC's records. Most refunds clear within 30 days. Find it via gov.uk SDLT pages.
→Form SDLT16 - the paper fallback. Used if the online service is unavailable, if the claim is unusually complex (joint purchase mid-divorce, beneficiary changes between completion and refund), or if an agent is filing on behalf of multiple claimants. Slower (usually 6-12 weeks).

Frequently Asked Questions

Can I claim a stamp duty refund?

You can claim if you paid the 5% additional-property surcharge and have since sold a previous main residence within 3 years; if you paid the 2% non-UK-resident surcharge and have become UK-resident within 2 years; if the property was mis-classified as residential; or if the property was uninhabitable at completion. Always claim within 12 months of the qualifying event (or 2 years for non-UK-resident refunds).

How do I claim a stamp duty refund?

Use HMRC's online repayment service for higher rates of SDLT (the primary route) or paper form SDLT16. You need the UTRN from the SDLT5 certificate, completion dates, and bank details. HMRC pays interest on the refund from the original payment date.

How long does a stamp duty refund take?

Online claims clear within 30 days for straightforward replacing-main-residence refunds. SDLT16 paper claims take 6-12 weeks. Mixed-use re-classification and uninhabitable-property claims can take longer because HMRC may request supporting evidence (surveyor reports, valuations, photographic evidence).

Related guides

Second Home Surcharge

The 5% surcharge and replacing-main-residence refund route in detail.

Additional Property

5% surcharge for investors and landlords.

Non-UK Resident

The 2% surcharge and 183-day refund test.

Exemptions and Refunds

Statutory exemptions and refund overview.