Background: Links between math anxiety and the choice of a math-intensive career might change over develop- ment and difer by gender. The study included three research populations: primary school (N=87, 48 females, mean age=10.2), high school (N=107, 61 females, mean age=15.7), and university students (N=100, 53 females, mean age=27.4). Students completed a math anxiety questionnaire and reported their desired career choice. Results: Findings suggest that math anxiety directly predicted the career choice math intensity for high school and university students, but not primary school students. Gender had a direct efect on younger students, as female students attending primary and high school preferred careers with a lower math intensity. The efect of gender on career choice math intensity for university students was not direct but mediated by math anxiety. Conclusions: It is crucial to identify young students with math anxiety and provide appropriate math anxiety reduction programs to reduce the cumulative efect of math anxiety on academic achievement and career choice.