Buying a Second Home: The 5% Stamp Duty Surcharge Explained (2026/27)

What actually triggers the surcharge

The additional-property SDLT surcharge isn't really about "second homes" in the everyday sense of a holiday cottage — it's triggered by a much broader, mechanical test: do you own two or more residential properties anywhere in the world at the end of the day you complete on the new purchase? If the answer is yes, and you aren't simply replacing your only or main home in a straightforward like-for-like move, the 5% surcharge applies.

This catches a wide range of buyers who might not think of themselves as "second home owners" in the holiday-home sense:

• Someone buying a coastal cottage purely for family holidays
• A parent buying a flat for their student child to live in
• A landlord adding a buy-to-let to an existing portfolio
• Someone buying a new main home before their old one has sold

All of these fall under the same surcharge rules. There's no separate, lighter-touch category for a holiday home you'll never let out — HMRC's test is about how many properties you own, not what you intend to do with the new one.

The rates: standard SDLT plus 5%

Since October 2024 the additional-property surcharge has stood at 5%, added on top of the standard tiered SDLT rates that apply in England and Northern Ireland.

Unlike the tiered standard rates, the 5% surcharge itself is a flat charge on the entire purchase price — it isn't tiered. That's an important distinction when estimating a bill, because it means the surcharge portion alone is simply 5% multiplied by the full price, while the standard SDLT portion is worked out band by band.

Worked example: a £350,000 second home

Here's the full calculation for a £350,000 holiday home purchase in England, bought as an additional property.

Standard SDLT (tiered):

Surcharge (flat 5% of the full price):

£350,000 × 5% = £17,500

Total SDLT due on completion:

£7,500 + £17,500 = £25,000

That's a substantial addition — more than three times the £7,500 the same buyer would pay if this were their only home. Model your own purchase price and see how the bands and surcharge combine using

.

The 3-year refund window explained

The surcharge exists to tax genuinely additional properties, not to penalise someone who's simply mid-way through moving house. If you complete on a new main residence before your old one has sold — a common situation in a slow-moving chain — you'll pay the surcharge on completion because, at that moment, you technically own two properties. But you don't have to keep paying it permanently.

If you sell your previous main residence within 3 years of completing on the new property, and the new property becomes your only or main residence, you can apply to reclaim the surcharge portion of the SDLT you paid. In effect, the surcharge is treated as if it never applied, because with hindsight the new purchase turned out to be a straightforward replacement of your main home rather than a genuine second property.

To make the claim:

• You (or your conveyancer) submit a refund request to HMRC after the old property sale completes
• The claim must be made within 12 months of the sale completing, or within 12 months of the SDLT filing date for the original purchase — whichever is later
• HMRC repays the surcharge portion of the SDLT, not the standard SDLT you'd have owed anyway

Worked example: claiming the refund

Suppose the same buyer who paid £25,000 SDLT on their £350,000 second home eventually sells their previous main residence 18 months later, and the new property becomes their only home from that point on.

The buyer ends up paying exactly what they would have paid buying a single main residence at £350,000 — £7,500 — once the refund comes through, even though they had to fund the full £25,000 upfront at completion.

How the surcharge scales with purchase price

The surcharge is a flat 5% regardless of price, but combined with the tiered standard rates, the total SDLT bill grows faster than the purchase price on a second home, particularly once you cross into the higher standard-rate bands.

The effective rate — total SDLT as a percentage of the purchase price — climbs steadily as the price rises, because the standard rates themselves are tiered upward while the 5% surcharge applies uniformly to the whole price. Anyone budgeting for a second home purchase well above £350,000 should expect the total tax bill to represent a noticeably larger share of the purchase price than it would for a similarly priced main residence.

Second homes versus buy-to-let: same surcharge, different ongoing tax picture

It's worth being clear that while the SDLT surcharge treats a personal holiday home and a rental property identically at the point of purchase, the two diverge sharply afterwards. A holiday home held purely for personal use generates no rental income to declare, doesn't trigger Section 24 mortgage interest restrictions (because there's no rental profit calculation to restrict), and won't usually be liable for business rates unless it meets specific self-catering letting thresholds. A buy-to-let, by contrast, involves ongoing Income Tax on rental profit, the Section 24 mortgage interest credit mechanism, and different considerations at eventual sale. The SDLT surcharge is only the first tax event in what can be two very different ongoing tax journeys, even though the purchase-day calculation looks the same. If you're planning to occasionally let out what's primarily a personal holiday home, it's worth understanding

alongside the pure SDLT position, since even occasional letting income needs to be declared.

Council tax on a second home

Beyond SDLT, most councils in England, Scotland and Wales now apply a council tax premium to second homes that are furnished but not used as anyone's main residence, on top of the standard council tax band charge — in many areas this premium can double the annual council tax bill compared with a main residence in the same band. This is a separate, ongoing annual cost from the one-off SDLT surcharge paid at purchase, and it's worth factoring into the total cost of ownership rather than treating the SDLT bill as the only "extra" cost of buying a second home. Rules and premium levels vary by local authority and by nation, so it's worth checking the specific council's current policy before completing.

What doesn't count as a second home

Not every additional property purchase triggers the surcharge. A few common situations are treated differently:

• Replacing your only home in a simultaneous or near-simultaneous transaction — selling your old main residence and buying a new one doesn't normally trigger the surcharge, because you don't own two properties at the end of the relevant day.
• Buying your very first property, even if a family member who isn't a joint buyer already owns a home — the surcharge test looks at the buyer's own ownership, not their wider family's.
• Inherited property held jointly in very small shares may, in some circumstances, be disregarded for the purposes of the test, though the rules here are detailed and worth checking against your specific situation.

None of these exceptions apply to a straightforward holiday-home purchase where the buyer already owns their main residence and isn't selling it — that remains squarely within the surcharge rules described throughout this article.

Practical checklist before you complete

• Confirm whether you'll own two or more residential properties at completion — the surcharge test is mechanical, not about intent.
• If buying jointly with a spouse or civil partner, remember you're assessed as a single unit — their existing property ownership counts even if the new home is in your name alone.
• Budget for the full surcharge amount at completion, even if you expect to reclaim it later — the refund only arrives after your old home sells.
• If you're relying on a refund, diarise the 3-year deadline from your completion date, not from when you expect the sale to happen.
• Keep a copy of your SDLT return and completion statement — you'll need the details to file the refund claim.
• If the second home is in Scotland or Wales, check LBTT or LTT figures separately, since the England/Northern Ireland SDLT rules and rates covered here don't apply there.