In 2010, the French spent 41 billion hours working on core household tasks, mainly cooking (29%) and housework (26%); to this were added 16 billion hours of activities such as do-it-yourself, gardening, shopping, etc. This home-made production leads to a high level of extra consumption by households on which we can put a figure of around 700 billion euros (+63%), after making a certain number of assumptions of varying validity. Although no monetary exchange takes place, a market equivalent can be calculated by valuing hours of work according to the wages that would be paid for this work if it were carried out by someone else, and by taking related expenditure into account. Whether for cooking, housework, laundry, personal care, transport or even volunteer work, domestic production is very much greater than the corresponding market consumption (restaurants, employing a cleaner, laundry, etc.).