At the price where half of Wales's homes sell, a landlord buying a second property pays a clean, flat 5% in Land Transaction Tax (LTT) — no bands, no stacking, no arithmetic. Buy the same home in England and the bill works out at 5.84%. Buy it in Scotland and it is 8.66%. The reason is structural, not political: below Wales's £225,000 nil-rate threshold, the standard LTT rate is 0%, so the entire tax bill on an additional property is just the +5% surcharge with nothing added on top of it. England's standard 2% band already starts at £125,000, so its equivalent sub-£225,000 rate is never quite flat. Scotland's nil-rate band stops at £145,000, and its Additional Dwelling Supplement is 8%, not 5% — so the gap is wider still.
That £225,000 threshold matters more in Wales than almost anywhere else in Great Britain: 52.6% of the 40,022 residential sales recorded across Wales in 2025 (HM Land Registry Price Paid Data, category A, houses and flats) sold for less than £225,000. For a majority of the Welsh property market, a landlord's LTT bill is genuinely just "5% of the price paid," with no further calculation needed — a rare piece of tax simplicity in an otherwise complicated system.
Why the flat rate exists
Wales's Land Transaction Tax charges 0% on the portion of a purchase up to £225,000 for a standard home mover. Wales has no first-time buyer relief, so movers and first-time buyers pay the same standard rate (Welsh first-time buyers pay what English ones don't). For an additional property — a buy-to-let, a second home — the Welsh Revenue Authority adds a flat 5 percentage point higher-rate surcharge across every band, including the 0% band. Below £225,000, 0% + 5% = 5% of the whole price, with nothing else to add.
England's Stamp Duty Land Tax works differently below that price point. Its standard nil-rate band only runs to £125,000; the next £125,000 (to £250,000) is taxed at 2% before the surcharge is added. That means an additional-property purchase in England starts climbing above a flat 5% the moment the price passes £125,000 — well before Wales's threshold.
The cost stack, priced across three nations
Every figure below comes from a live calculation against each nation's current residential rates for an additional-property purchase (Homecost stamp duty calculator, fetched 4 September 2026):
| Price | Wales LTT | Wales rate | England SDLT | England rate | Scotland LBTT | Scotland rate |
|---|---|---|---|---|---|---|
| £129,552 (avg. Welsh sale under £180k) | £6,478 | 5.00% | £6,569 | 5.07% | £10,364 | 8.00% |
| £150,000 | £7,500 | 5.00% | £8,000 | 5.33% | £12,100 | 8.07% |
| £180,000 | £9,000 | 5.00% | £10,100 | 5.61% | £15,100 | 8.39% |
| £216,000 (2025 Welsh median) | £10,800 | 5.00% | £12,620 | 5.84% | £18,700 | 8.66% |
| £225,000 (Wales nil-rate ceiling) | £11,250 | 5.00% | £13,250 | 5.89% | £19,600 | 8.71% |
| £250,000 | £14,000 | 5.60% | £15,000 | 6.00% | £22,100 | 8.84% |
| £300,000 | £19,500 | 6.50% | £20,000 | 6.67% | £28,600 | 9.53% |
| £350,000 | £25,000 | 7.14% | £25,000 | 7.14% | — | — |
| £400,000 | £30,500 | 7.62% | £30,000 | 7.50% | £45,350 | 11.34% |
Two things stand out. First, Scotland's Additional Dwelling Supplement makes it the most expensive nation for landlord purchases at every price point tested, by a wide margin throughout. Second, Wales and England are not permanently ordered — they cross. At £350,000 the two regimes charge exactly the same, £25,000. Below that price, Wales is cheaper for a landlord; above it, Wales becomes more expensive, and the gap widens fast as prices rise further (a fuller breakdown of that upper end is in Wales vs England Stamp Duty: the cost gap above £400,000).
For context on scale: 82.5% of 2025 Welsh residential sales completed below £350,000. For the large majority of the Welsh market, the LTT surcharge structure works in a landlord's favour relative to England, not against it — the opposite of the impression a headline "Wales has higher property tax" comparison might give if it only looked at prices above £400,000.
Financing the purchase
Land Transaction Tax is only the upfront tax line in a buy-to-let purchase; the mortgage is usually the larger ongoing cost. The Bank of England's most recently quoted rate for a 75% loan-to-value five-year fixed product — a typical buy-to-let structure — was 4.32% in April 2026 (Bank of England quoted household interest rates). On a £216,000 property bought with a 25% deposit, that implies borrowing around £162,000; at 4.32% on an interest-only basis, monthly interest alone runs to roughly £583, before letting costs, insurance, maintenance, or management fees. Actual rates vary by lender, product and the borrower's credit and rental-cover position — a mortgage broker or lender can quote the specific deal available.
What this doesn't cover
Council tax is charged separately from LTT and varies by local authority. Homecost's Band D dataset currently covers England only; a Welsh landlord should check their target local authority's own council tax page for the current rate, since Wales sets its own bands and levels independently of England. Selling the property later may also trigger Capital Gains Tax, which sits outside LTT entirely and is not covered here.
This is general information about how Land Transaction Tax, Stamp Duty Land Tax and the Land and Buildings Transaction Tax surcharge are structured — not advice on whether or where to buy. Speak to a qualified tax adviser or conveyancer before acting on any purchase.
See the numbers for a specific property
Try Homecost's postcode tool for Cardiff to see a property's transaction history and cost breakdown, or run your own numbers through the stamp duty calculator for any price and buyer situation. For the mechanics of claiming back the higher-rate surcharge if a sale completes later, see how to claim back Wales's higher LTT rate. More cost-intelligence pieces like this one are indexed on the Homecost blog.