Wales has increased the minimum tax payable when claiming Multiple Dwellings Relief (MDR) under Land Transaction Tax to 3%, effective today, Friday 13 February 2026. The Senedd approved the regulations on 10 February and they were then made by Welsh Ministers ahead of commencement. (laiddocuments.senedd.wales)

MDR lets purchasers of more than one dwelling calculate tax on the average price per unit, but a minimum applies so the residential element of a deal cannot be taxed at a near‑zero rate. Ministers say the uplift from 1% to 3% aims to improve fairness and in practice most cases affected are mixed‑use purchases such as a shop with flats above. (record.senedd.wales)

Transitional rules apply. The 3% floor bites on transactions with an effective date on or after 13 February 2026. Deals under contracts entered into and substantially performed before 13 February are outside scope, and pre‑13 February contracts can still fall under the old 1% floor unless varied, assigned or otherwise re‑papered after that date. Where a post‑commencement transaction is linked to a pre‑commencement transaction that qualified for MDR, the amendment does not apply to the post‑commencement deal. Check documents carefully before agreeing variations. (laiddocuments.senedd.wales)

Context matters for UK investors. England and Northern Ireland abolished Stamp Duty Land Tax MDR for transactions completing (or substantially performed) on or after 1 June 2024, with protection for exchanges on or before 6 March 2024. Wales is taking a different path: retaining MDR but tightening the minimum. (gov.uk)

What changes on price? When the minimum rule binds, the liability on the residential element now starts at 3% of that portion’s consideration, up from 1%. On a mixed‑use purchase where the dwellings are valued at £350,000, the minimum rises from £3,500 to £10,500-an extra £7,000. If the dwellings portion is £1.2m, the minimum rises from £12,000 to £36,000-an extra £24,000. The actual bill may be higher once the full calculation is done; these figures illustrate the floor effect.

Investors should note the floor only matters where the MDR calculation would otherwise fall below 3% of the dwellings value. For many residential‑only bulk purchases at higher average unit prices, the MDR computation already exceeds 3% and today’s change makes no difference. The Welsh Government’s own explanatory material frames the increase as a targeted fairness measure rather than a wide‑scale revenue raiser. (laiddocuments.senedd.wales)

Deal teams with live Welsh pipelines should immediately re‑run cashflows and sensitivity tests using a 3% floor on the dwellings portion. Pay particular attention to: whether your exchange date was before 13 February 2026; any variations or assignments being contemplated; and whether any linked‑transaction sequencing might keep subsequent stages under the previous rules. A small drafting change post‑exchange could forfeit transitional protection. (laiddocuments.senedd.wales)

Politically, ministers had also explored an ‘equalisation rule’ to align per‑dwelling tax outcomes between multiple‑dwelling and single‑dwelling cases at higher residential rates. That provision was dropped from the final package due to technical complexity and is left to a future administration to consider, signalling that MDR policy in Wales remains live. (gov.wales)

Bottom line for property buyers and developers: Wales remains open to MDR claims-but with a higher floor from today. The change particularly affects mixed‑use blocks and lower‑value bulk buys. Cross‑border investors active in England and Northern Ireland should not assume SDLT treatment carries over; rules diverged from 1 June 2024 in those jurisdictions. Confirm positions with advisers and watch for updated Welsh Revenue Authority guidance. (gov.uk)