For each brand, the annual average satisfaction index (IS) was calculated by adding up the monthly values (to the third decimal point) and dividing the total by the number of months with a calculated satisfaction index. The final result was rounded to the first decimal point.
The winning brands in each category needed to achieve a minimum IS value of 70 out of 100.
Only brands that received complaints in the year 2026 were considered.
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Rating of selected supermarkets in Portugal 2026, by satisfaction index
Aldi Portugal was the most popular supermarket in 2026 according to the satisfaction index. It had an index of **** points out of 100. It was followed by Pingo Doce, with a score of **** points, while Lidl ranked third.
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Portal da Queixa. (January 20, 2026). Rating of selected supermarkets in Portugal in 2026, by average satisfaction index [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 29, 2026, from /statistics/1334960/portugal-most-popular-supermarkets/
Portal da Queixa. "Rating of selected supermarkets in Portugal in 2026, by average satisfaction index." Chart. January 20, 2026. ÌÇÐÄÆÆ½â°æ. Accessed July 29, 2026. /statistics/1334960/portugal-most-popular-supermarkets/
Portal da Queixa. (2026). Rating of selected supermarkets in Portugal in 2026, by average satisfaction index. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 29, 2026. /statistics/1334960/portugal-most-popular-supermarkets/
Portal da Queixa. "Rating of Selected Supermarkets in Portugal in 2026, by Average Satisfaction Index." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 20 Jan 2026, /statistics/1334960/portugal-most-popular-supermarkets/
Portal da Queixa, Rating of selected supermarkets in Portugal in 2026, by average satisfaction index ÌÇÐÄÆÆ½â°æ, /statistics/1334960/portugal-most-popular-supermarkets/ (last visited July 29, 2026)
Rating of selected supermarkets in Portugal in 2026, by average satisfaction index [Graph], Portal da Queixa, January 20, 2026. [Online]. Available: /statistics/1334960/portugal-most-popular-supermarkets/