Data
Shelf Indices
Data Purl Shelf Indices are free monthly measures of online prices and discounting by department in the US, the UK, Germany and Spain, built from the same products tracked week after week at covered retailers. In August 2026, full prices of the same US apparel products were +2.0% on a year earlier. Every series has a definition, a chart and a CSV download.
Version 2026-09. Data through August 2026. Updated monthly. All series (JSON)
United States
| Series | Price change, Aug 2026 | A year earlier | Markdown breadth |
|---|---|---|---|
| US apparel | +2.0% | +2.7% | 45.0% |
| US footwear | +1.7% | +2.5% | 31.7% |
| US accessories | +7.6% | +4.6% | |
| US jewelry | +14.2% | +7.4% | |
| US home improvement | +3.4% | +0.1% | |
| US home goods | +1.4% | -3.5% | |
| US furniture | -1.6% | -2.6% | |
| US garden and patio | -0.3% | -1.8% | |
| US kitchen and dining | +2.8% | -0.2% | |
| US home appliances | +1.3% | +2.2% | |
| US pet | +1.0% | +1.3% |
United Kingdom
| Series | Price change, Aug 2026 | A year earlier | Markdown breadth |
|---|---|---|---|
| UK apparel | 0.0% | +0.9% | 47.1% |
| UK footwear | +0.4% | -0.1% | 38.3% |
| UK home improvement | +1.6% | +0.5% | |
| UK home goods | +0.8% | +1.8% | |
| UK beauty | +1.1% | +1.8% |
Germany and Spain
| Series | Price change, Aug 2026 | A year earlier | Markdown breadth |
|---|---|---|---|
| Germany and Spain apparel | +0.9% | -0.6% | 46.1% |
| Germany and Spain footwear | +0.5% | +0.5% | 39.2% |
What the measures mean
- Shelf price change
- The change in the full (list) price of the same products at the same retailers, compared with the same month a year earlier, in local currency. Only products listed in both months count, so new launches and discontinued lines do not move it. Price changes are combined with a geometric mean, the method statistical agencies use for matched prices.
- Markdown breadth
- The share of in-stock SKUs (each size or variant) selling below full price.
- Average discount
- The average discount on in-stock SKUs that are marked down, measured against their full price and weighted by value.
Full definitions are on the methodology page. Free to reuse with attribution to Data Purl (CC BY 4.0).
Need it by brand, retailer or week?
These indices are department-level and monthly. The full dataset breaks every measure down by brand, retailer, category and week, with brands resolved to their owners.