Why Welsh House Prices Bunch at Round Numbers, Not Just LTT Bands

A Land Registry sale in Wales is roughly 2,900 times more likely to land on exactly £225,000 than on any single price a few thousand pounds either side of it. That number sits precisely on the boundary of Wales's Land Transaction Tax (LTT) bands, where the 0% rate gives way to 6%. It looks like a textbook case of a tax threshold bending the market.

Except the same spike — at a similar or even larger scale — turns up at £250,000 and £275,000, two prices with no LTT significance whatsoever in Wales. Testing all four price points side by side gives a more honest answer than "thresholds cause bunching": round numbers cause bunching, and the tax band at £400,000 appears to add a modest effect on top of that baseline.

The method

Using HM Land Registry Price Paid Data for Wales (la_code LIKE 'W06%', category A — standard market sales only, 2024 and 2025 combined), this analysis counts sales in £5,000 windows either side of four prices: the two Welsh LTT thresholds (£225,000 and £400,000) and two round numbers with no Welsh tax significance (£250,000 and £275,000). In total, more than 13,500 transactions fall inside the eight price windows examined. Data queried 2026-09-05.

£225,000 — the 0%-to-6% LTT boundary

Sales fall off a cliff the moment the price ticks past £225,000, then largely recover within £5,000–£10,000.

£400,000 — the 6%-to-7.5% LTT boundary

This is the deepest and slowest-recovering dip of the four price points tested — sales are still running below baseline density £15,000 above the threshold.

The control: £250,000 and £275,000 aren't Welsh thresholds at all

£250,000 sits inside Wales's flat 6% band (no boundary there), though it is a genuine threshold elsewhere — England's standard SDLT higher band and Scotland's LBTT 5% band both begin there. £275,000 has no tax significance in any UK nation; it's simply a round number.

Both non-threshold round numbers spike and recover on almost the same shape as the genuine £225,000 LTT boundary — in the £250,000 case, the spike is larger. If Land Transaction Tax were the main driver, a price with zero Welsh tax relevance shouldn't out-spike an actual band edge.

What's actually going on

Round-number pricing is a well-documented feature of negotiated markets generally — asking prices, offers and final agreed prices cluster on numbers that are easy to say and remember, independent of tax. The Welsh data is consistent with that: £225,000, £250,000 and £275,000 all show comparable multi-thousand-fold spikes and a similar "cliff then recovery" shape within about £10,000.

£400,000 is the exception worth flagging. Its immediate post-threshold dead zone (15% of baseline) is markedly deeper than either non-threshold control (28% and 34%), and density hasn't fully recovered even £15,000 past the line. That's consistent with LTT's 6%-to-7.5% step nudging a slice of negotiations to settle just under £400,000 rather than just over it — a real but modest effect layered on top of the much larger round-number pattern, not the whole story on its own.

Land Transaction Tax is charged on a marginal basis in Wales, like income tax bands — crossing £400,000 by £1 adds roughly 8p in tax, not thousands of pounds. There's no cliff-edge financial penalty for buying at £400,001 rather than £399,999. Whatever nudges the £400,000 pattern, it isn't a large cash saving from staying under the line.

How Wales's LTT bands work

Wales has no first-time buyer relief — the 0% band applies to every residential buyer regardless of buying history. Figures confirmed against the live LTT calculation used on Homecost's stamp duty and LTT calculator.

Try it on a real price

A £225,000 sale in Cardiff pays no LTT at all; £226,000 pays £60. Run your own number through Homecost's Land Transaction Tax calculator, or look up a Cardiff property's true cost to see how LTT, mortgage and council tax stack up together for a specific address.

For the equivalent exercise in England, see The £500k Stamp Duty Cliff: London's Commuter Ring, and for how Wales's bands compare directly against England's and Scotland's, see SDLT vs LTT vs LBTT: the exact price crossovers. Browse more Cost Intelligence guides on Homecost.

This analysis is based on more than 13,500 HM Land Registry sale records for Wales across 2024–2025 and the current Welsh Revenue Authority Land Transaction Tax bands — see Homecost's full guide library for the underlying data sources.

This is general information about how Land Transaction Tax bands work, not advice on when to buy or sell. Speak to a qualified conveyancer or tax adviser before acting on any LTT or Stamp Duty calculation.