Groceries are a high-turnover, thin-margin business. On fresh goods the margin runs to a few percent, so profit is decided by waste rather than by pricing. The bread thrown out at eight in the evening eats the margin from a whole shelf. Order without watching real sales data and you lose money in a busy shop.
The second thing no franchise presentation opens with: opening hours. The network will want early mornings, Sundays and public holidays, and staff for those shifts are hard to find. Most franchisees stand at the till themselves for the first year. If you want a business that runs without you being present, this is not it.
5 in this category
The convenience format of the French retail giant — a small neighborhood store with everyday essentials and Carrefour's backing.

A network of small neighbourhood shops where you run your own store with no upfront investment and earn a monthly fee for operating it.
Run your own grocery store under a strong national brand and with the buying power of a large network of independent merchants.

Run your own wine shop under a brand with two centuries of history and open the door to customers an independent store could never win on its own.
Run a full-format grocery supermarket as an independent entrepreneur, but with the buying power of a large group behind you and a genuine voice in how it is run.
It varies sharply by category: ambient goods and drinks carry more, while bread, milk and sugar carry far less because shoppers compare those prices directly. Each profile states the range the franchisor declares and whether it sets your retail prices for you.
Beyond the entry fee, budget for shop fit-out, refrigeration and the first full stocking, all of which you fund yourself. Stock and cooling equipment are usually the largest items. Each profile separates what the network supplies from what stays on your invoice.
Footfall and the competition within a few minutes' walk decide it. In a city you pay higher rent but sell more, including at unusual hours. On a smaller housing estate rent is lower, yet evening takings often fail to cover extended opening hours.