Step 1: Identifying the Overpayment
Most stamp duty refund claims begin with a simple review. Either the homeowner realises something was missed, or a specialist flags a potential overpayment based on the property details and purchase circumstances.
The most common triggers for overpayment include:
- Second home surcharge refund — you paid the additional 3% (now 5%) surcharge but later sold your previous main residence within the required timeframe. See our second home stamp duty refund guide.
- Chattel apportionment — part of the purchase price related to carpets, curtains, or fittings that should have been excluded from the SDLT calculation.
- Uninhabitable property — the property lacked basic amenities at completion, meaning it may have qualified for non-residential or mixed-use rates. Learn more in our uninhabitable property stamp duty guide.
- Multiple Dwellings Relief (MDR) — a purchase involving more than one dwelling where relief was not applied.
Step 2: Gathering Evidence
Once a potential overpayment has been identified, you need to gather the supporting documentation. The specific evidence required depends on the type of claim, but typically includes:
- Your original SDLT return — your solicitor should have a copy of the SDLT5 certificate and the return itself.
- Completion statement — showing the purchase price breakdown and any apportionments.
- Sale contract — the contract of sale, including any special conditions or agreed chattel values.
- Evidence supporting the claim basis — this varies: photographs of the property condition for uninhabitable claims, the TA10 Fittings and Contents Form for chattel claims, or completion confirmation for a second home sale.
Step 3: Preparing the Amendment
A stamp duty refund is claimed by submitting an amendment to the original SDLT return. This must be done within 4 years of the effective date of the transaction (usually the completion date).
The amendment can be submitted online via HMRC's SDLT portal, or by posting form SDLT 2 to HMRC's stamp duty office in Birmingham. If you're using a specialist, they will prepare and submit the amendment on your behalf.
If you prefer to handle it yourself, our DIY Claim Pack includes step-by-step instructions, template letters, and the exact forms you need.
Step 4: HMRC Processing
HMRC typically processes straightforward amendments within 15–20 working days. During this period, HMRC reviews the amended return and recalculates the SDLT liability based on the revised figures.
More complex claims — or those that trigger a compliance check — can take longer. A period of 6–12 weeks is not unusual for claims involving uninhabitable property or significant chattel values. In some cases, HMRC may write to request additional supporting evidence before processing the amendment.
Step 5: Receiving the Repayment
Once HMRC accepts the amendment, the overpaid SDLT is repaid directly to the bank account on the original return. If no bank details were provided at the time, HMRC will issue a cheque to the address on file.
Interest is not typically payable on SDLT overpayments unless HMRC caused the delay. The repayment amount is the difference between the original SDLT paid and the recalculated amount under the amended return.
What Can Go Wrong
While most well-prepared claims are processed without issue, there are situations where things can go wrong:
- Late claims — submitting outside the 4-year window means HMRC will reject the amendment automatically.
- Insufficient evidence — claims without adequate supporting documentation are more likely to be queried or rejected.
- Chattel valuation disputes — HMRC may disagree with the chattel values if they appear inflated or are not supported by evidence.
- Solicitor errors — mistakes in the original return can complicate the amendment process, though they do not prevent a claim.
If your claim is rejected or queried, see our guide on what happens if HMRC rejects your stamp duty claim.
For professional support with any type of SDLT reclaim, you can connect with a vetted specialist through our platform at no upfront cost.
Frequently Asked Questions
How long does a stamp duty refund take?
Typically 15–20 working days for straightforward claims. Complex cases — including those involving compliance checks or requests for additional evidence — can take 6–12 weeks.
Do I need a solicitor to claim a stamp duty refund?
No — you can submit an amendment yourself. Our DIY Claim Pack walks you through the process step by step, including the forms and letters you need.
Can I claim a refund if I used a solicitor who made an error?
Yes — errors by your conveyancing solicitor do not prevent you from claiming a refund. The amendment is submitted directly to HMRC and corrects the original return regardless of who prepared it.