Can I get a stamp duty refund if I sell my previous main home after buying a new one?

Full answer

Buyers who purchase a new main home before selling their existing one are charged the higher additional-dwelling Stamp Duty Land Tax (SDLT) surcharge upfront, but a specific refund mechanism exists once the old property is sold, provided strict time limits are met. **Why the higher rate is charged in the first place** When you complete on a new home while still owning your previous main residence (even briefly, in a 'chain break' or bridging situation), HMRC treats the purchase as if it were an additional property, charging the extra SDLT surcharge (a flat percentage added to each SDLT band) on top of the standard rates -- even though your genuine intention is to sell the old home and only ever own one main residence at a time. **The refund window** If you sell (or otherwise dispose of) your previous main residence within 3 years of completing the purchase of the new one, you can apply to HMRC for a refund of the additional-dwelling surcharge portion of the SDLT you paid -- effectively putting you in the same tax position as if you had bought your new home without ever owning two properties simultaneously. **How and when to claim** The refund claim must be made within the LATER of: 12 months from the date you sold your previous main residence, or 12 months from the filing date of the SDLT return for the new purchase (broadly 14 days after completion for that return, so this second option gives you a bit over 13 months from the new purchase in total) -- whichever of these two deadlines falls later gives you the actual cut-off. Missing both deadlines generally means losing the right to reclaim the surcharge, even if you genuinely sold within the 3-year ownership window. **Worked example** A buyer purchases a new main home for £400,000 while still owning their previous house, paying the standard SDLT plus the additional-dwelling surcharge (a flat extra percentage on the full price) -- adding several thousand pounds to their SDLT bill compared with a standard single-home purchase. Fourteen months later, they finally complete the sale of their old house. Because this is within the 3-year ownership overlap limit, they can apply to HMRC for a refund of the surcharge portion (not the standard SDLT, only the additional amount charged because of owning two properties), provided they submit the refund claim within 12 months of that sale completing. **What if you never manage to sell within 3 years** If the previous home is not sold within the 3-year window (for example, due to a protracted sale, family circumstances, or simply choosing to keep it as a rental), the surcharge becomes permanent and non-refundable, since the property genuinely became (or remained) an additional dwelling rather than a temporary overlap during a straightforward main-home move. **Practical tip** Keep clear documentary evidence of both completion dates (the new purchase and the eventual sale of the old home), and diarise both possible refund deadlines as soon as the new purchase completes, since it is easy to lose track of the 12-month claim window, particularly if the sale of the old property drags on close to, or beyond, the 3-year mark.

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