A DealsFirst data product
The UK Discount Index
One number for how hard Britain’s shops are discounting — measured every day from every live deal and sale we track across 500+ retailers. No surveys, no panels: the shelves themselves.
Today — 5 September 2026
41.1
▼ 2.5 this weekHigher means deeper, broader discounting across UK retail.
Live inputs: 117,971 deals · 386 tracked sales · snapshots daily at 7am
The index, day by day
since 19 July 2026Depth
59.7%
of all live deals are at least 50% off
weight 0.5
Clearance
26.6%
of discounted stock is at 70% off or deeper
weight 0.2
Churn (context)
8,343
new deals landed in the last 24 hours
not in the index — shown for pace
Where the deep cuts are
Share of each sector’s live deals at ≥50% off · today
Shops in full sale mode
all 324 shops →Share of the shop’s entire range at ≥30% off · this week
✦ marks a genuine event — well above that shop’s own typical week. A weekly companion series; not part of the UKDI formula.
How it’s calculated
UKDI = 0.5·Depth + 0.3·Breadth + 0.2·Clearance
Depth asks how much of the market is seriously discounted. Breadth asks whether whole shops are on sale, or just corners of them. Clearance asks how much is being moved out at desperation prices. Each is a plain percentage of live, verified listings — no modelling, no seasonal adjustment, reproducible from our public data.
Advertised was-prices are validated first: discounts above 90% and known inflated-RRP patterns are excluded, so the index can’t be gamed by fake markdowns.
Free to cite with attribution as the DealsFirst UK Discount Index — questions to hello@dealsfirst.co.uk.