This paper examines the attitude of consumers living in Germany towards higher prices charged to female consumers by surveying them randomly in two scenarios, one showing the same price and the other showing a higher price for the female version of the product. The interaction of Pink-tax and price fairness, and how gender mediates this perception was tested through a within-subject factorial design experiment, with two variables, price as the independent variable and gender as the mediator. Afterwards, respondents were asked several questions about their perception of Price-Fairness. The results show that women have a marginally stronger negative perception when shown the higher price. Keywords: Pink-Tax, consumer response, Price-fairness perception. This master's thesis was presented on October 11, 2021, at 9:00 am, and was evaluated by the following committee: Luz Alexandra Montoya Restrepo (Msc - Ph.D.) Affiliation: University of National Colombia Teacher Sandra Patricia Rojas Berrio (Msc - Ph.D.) Affiliation: University of National Colombia Teacher Juan David Suarez Moreno (Msc - Ph.D.) Affiliation: University of National Colombia Teacher The thesis investigates how female and male consumers respond to the "pink tax," which refers to the extra price paid by women for the female version of a product or service. The study uses a 2x2 factorial design experiment to examine the interaction between the pink tax and price fairness perception, with gender as a mediator. The results show that women have a marginally stronger negative perception of price fairness when presented with a higher price for the female version of a product. The study highlights the importance of understanding consumer attitudes towards price fairness and the impact of gender on these perceptions. The findings suggest that price fairness is a crucial factor in consumer decision-making, and that gender differences in price fairness perception may influence consumer behavior. The study also emphasizes the need for further research on the effects of gender-based pricing on consumer behavior and the importance of ensuring fair pricing practices.This paper examines the attitude of consumers living in Germany towards higher prices charged to female consumers by surveying them randomly in two scenarios, one showing the same price and the other showing a higher price for the female version of the product. The interaction of Pink-tax and price fairness, and how gender mediates this perception was tested through a within-subject factorial design experiment, with two variables, price as the independent variable and gender as the mediator. Afterwards, respondents were asked several questions about their perception of Price-Fairness. The results show that women have a marginally stronger negative perception when shown the higher price. Keywords: Pink-Tax, consumer response, Price-fairness perception. This master's thesis was presented on October 11, 2021, at 9:00 am, and was evaluated by the following committee: Luz Alexandra Montoya Restrepo (Msc - Ph.D.) Affiliation: University of National Colombia Teacher Sandra Patricia Rojas Berrio (Msc - Ph.D.) Affiliation: University of National Colombia Teacher Juan David Suarez Moreno (Msc - Ph.D.) Affiliation: University of National Colombia Teacher The thesis investigates how female and male consumers respond to the "pink tax," which refers to the extra price paid by women for the female version of a product or service. The study uses a 2x2 factorial design experiment to examine the interaction between the pink tax and price fairness perception, with gender as a mediator. The results show that women have a marginally stronger negative perception of price fairness when presented with a higher price for the female version of a product. The study highlights the importance of understanding consumer attitudes towards price fairness and the impact of gender on these perceptions. The findings suggest that price fairness is a crucial factor in consumer decision-making, and that gender differences in price fairness perception may influence consumer behavior. The study also emphasizes the need for further research on the effects of gender-based pricing on consumer behavior and the importance of ensuring fair pricing practices.