Abstract: Sanitary pads are essential for the health, hygiene, and dignity of girls and women, yet their distribution in marginalized communities remains a persistent challenge. This study aimed to investigate the impact of project planning on the performance of sanitary pad distribution in NGO-funded programs in Loitoktok Constituency, Kajiado County, Kenya. The study was anchored on the Goal Setting Theory and Results-Based Management Theory. A descriptive survey design was adopted, targeting 94 rescue centers for girls escaping Female Genital Mutilation (FGM) and child marriages, and 76 public primary schools benefiting from the distribution programs. The target population comprised 564 individuals, including project managers, M&E officers, funding managers, coordinators, and distribution officers. A sample of 234 respondents was selected, and data were collected through structured questionnaires using the drop-and-pick method. Additionally, eight school heads were interviewed, representing 10% of the target group. A pilot study involving 19 respondents from Kajiado town was conducted to refine the tools. Quantitative data were analyzed using SPSS version 20, employing descriptive statistics (frequencies, percentages, averages) and inferential statistics through linear regression. The results revealed that project planning (β=0.35) had positive and statistically significant effects on the performance of sanitary pad distribution (p < .05). The study concluded that effective project planning processes enhance program performance and recommended institutionalizing comprehensive planning to improve menstrual hygiene outcomes for vulnerable girls.