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Co-op is on average 12.7% dearer than Iceland
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If we had drawn a different but equally fair set of basket products, the figure would fall inside this range 95 times out of 100. Products that share a shop product are drawn together, so a shared price never counts twice. The range runs from cheaper to dearer, so these two shops are too close to call.Why two numbers? Across the 114 matched own-label basket items used here, Co-op is 12.7% dearer than Iceland. The main ranking combines comparisons with other supermarkets within each category and gives Co-op a 15.3% higher price level than Iceland, a difference that passes the ranking's statistical test. It draws on more matched comparisons, involving different product selections. The direct comparison on this page estimates Co-op as 12.7% dearer, but its uncertainty range also allows for no difference. This page's direct comparison has fewer than 10 items in bread and cereals (4); non-alcoholic beverages (5); fruit (8), so a few products decide those categories and can move the figure. Your savings depend on what you buy. How we compare: allsupers.co.uk/research/methodology
Read the other way: Iceland is on average 11.3% cheaper than Co-op (a percentage changes with the shop you start from).
Based on 114 products in the Price Monitor's basket that both shops sell, matched to 69 different pairs of shop products, all listed below. For the full list, email research@allsupers.co.uk.
Co-op was dearer on 54, cheaper on 47 and the same price on 13 of these 114 products. These counts show direction only; the average above also weighs how large each difference is and each category's share of spending.
Each row starts from a product in our basket. At each shop we take the most similar own-label product, confirmed by our automated matching check. One shop product can be the closest match for several basket products, so it can appear in more than one row.
Few shared products in bread and cereals, non-alcoholic beverages, fruit; without them, this figure would be +8.3%.
Iceland's own-label range has no products similar enough to compare in personal care or sugar and sweets, so those two categories are missing for Iceland. In fish, other food, and oils and fats its figure rests on one product family each, and in household goods on two (both shopping bags). Its range is widened for the missing part.
How we compare prices
We compare the price per kilo, per litre or per item, so pack sizes do not distort the result. Items sold by the piece are only compared with a similar number of pieces. Own-label means each shop's own brands, whatever their name; premium ranges rarely pass our matching check, so these are mostly standard lines. Prices as of 30 September 2026; where a cheaper promotion was running, we use that price.
How the figure is worked out
For each spending category we average the price differences of the products both shops sell, then combine the categories by their share of household spending. The ranking on the Price Monitor page compares all shops at once, through every other shop as well, so it can differ from this two-shop figure; for these two shops the ranking gives Co-op 15.3% dearer. Categories with fewer than 10 products both shops sell: bread and cereals: 4 products, 24% of the weight, non-alcoholic beverages: 5 products, 11% of the weight, fruit: 8 products, 11% of the weight. They count at their full share of household spending, like every category, so they can move the figure more than their few products suggest.
The badge shows the price difference per unit for Co-op.
| Iceland | Co-op | |
|---|---|---|
| Co-op 20% cheaper per litre | ||
| Co-op 16% cheaper per litre | ||
| Co-op 6% cheaper per litre | ||
| Co-op 5% cheaper per kg | ||
 |  | Co-op 89% dearer per kg |
| Same price per litre | ||
| Co-op 17% dearer per litre | ||
| Co-op 44% dearer per kg | ||
| Co-op 3% cheaper per litre | ||
| Co-op 25% dearer per litre | ||
| Same price per litre | ||
| Co-op 18% dearer per litre | ||
| Co-op 3% cheaper per litre | ||
| Co-op 44% dearer per kg | ||
| Co-op 39% cheaper per litre | ||
| Co-op 44% dearer per kg | ||
| Same price per litre | ||
| Co-op 78% dearer per kg | ||
| Same price per litre | ||
| Co-op 39% dearer per kg | ||
| Co-op 10% cheaper per kg | ||
| Co-op 3% cheaper per kg | ||
| Co-op 13% dearer per kg | ||
| Co-op 9% cheaper per kg | ||
| Co-op 10% cheaper per kg | ||
| Co-op 34% dearer per kg | ||
| Co-op 33% dearer per kg | ||
| Co-op 19% dearer per kg | ||
| Co-op 5% cheaper per kg | ||
| Co-op 34% dearer per kg | ||
| Co-op 42% dearer per kg | ||
 |  | Co-op 13% dearer per kg |
 |  | Co-op 4% cheaper per item |
 | Co-op 33% dearer per kg | |
 |  | Co-op 12% cheaper per kg |
 |  | Co-op 6% dearer per kg |
| Co-op 6% dearer per kg | ||
 |  | Co-op 47% cheaper per kg |
| Co-op 53% dearer per kg | ||
 |  | Co-op 104% dearer per kg |
 |  | Co-op 53% dearer per kg |
| Co-op 19% dearer per kg | ||
| Co-op 13% dearer per kg | ||
| Co-op 225% dearer per kg | ||
| Co-op 56% dearer per kg | ||
 |  | Co-op 20% cheaper per item |
| Co-op 29% cheaper per litre | ||
 |  | Co-op 32% cheaper per kg |
 |  | Co-op 1% cheaper per item |
 |  | Co-op 6% dearer per kg |
| Co-op 24% dearer per kg | ||
 |  | Co-op 1% cheaper per item |
 |  | Same price per item |
 |  | Co-op 5% cheaper per item |
 |  | Co-op 20% dearer per item |
 |  | Co-op 5% cheaper per item |
| Co-op 3% cheaper per kg | ||
 |  | Co-op 38% dearer per item |
 | Co-op 67% dearer per kg | |
| Co-op 15% cheaper per kg | ||
| Co-op 3% cheaper per litre | ||
| Co-op 4% cheaper per kg | ||
 | Co-op 11% cheaper per kg | |
 | | Co-op 44% dearer per kg |
|  | Co-op 6% dearer per kg |
 | Co-op 26% cheaper per kg | |
 | Co-op 47% dearer per kg | |
| Co-op 17% dearer per kg | ||
 |  | Same price per item |
