In the search for a better tourism planning that allows reducing socio-ecological impacts, a new carrying capacity methodology called Multi-criteria Tourist Reception Analysis - MTRA is proposed. This model decreases the subjectivity of traditional carrying capacities methods, by including in the methodology to determine the maximum number of visits, the Analytical Hierarchical Analysis (AHP), which in turn has an element of mathematical analysis that allows the verification of the process. Additionally, the validation by means of the 3s technique provides greater objectivity to the calculation made, allowing the decision makers to have a more reliable result applicable to the studied territory. This new methodology was applied successfully in Haynes Cay, which is located in the San Andrés archipelago, which is part of the world biosphere reserve - called "Seaflower", obtaining a value of 149 people who can visit the Cayo daily, without this place being degraded by the pressure of tourism.