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The chain differences
Bónus (pink piggy logo) is the cheapest, with the most limited selection and most basic presentation. Krónan is the middle ground — better produce, slightly higher prices. Hagkaup is the "Whole Foods" of Iceland — premium, imported goods, good for one-off luxuries. Costco requires membership but wins on bulk basics (eggs, dairy, bread, paper goods).
What to skip in supermarkets: anything labelled "Icelandic lamb" cuts are 30%+ more than imported. Buy Icelandic skyr (a thick yogurt, like Greek yogurt but better) — it's much cheaper than abroad. Local vegetables are limited and expensive; meat and dairy are the strong points.
FAQ
Are stores open Sundays?
Most close early Sundays (Bónus 18:00, Krónan closed). Hagkaup and 10-11 stay open later. Sunday opening hours are a hangover from Iceland's Christian legacy — plans accordingly.
Is the fuel cheaper at Bónus?
No — Bónus doesn't have fuel. Their parent company operates N1 stations but those aren't at Bónus locations. Use Costco for fuel, Bónus for food.
What about eating out vs cooking?
Cooking saves 60–70% per meal vs restaurants. A dinner for two cooked from Bónus groceries costs ISK 2,500–3,500; the same in a restaurant is ISK 8,000–12,000. Many campsites have full kitchens — well-equipped, free to use.