Despite the multiple studies on determinants of implementation of performance contracting, there exist a knowledge gap on the relationship of public budget financing, performance contracting policy, and participatory management with the implementation of performance contracting. There is also a debate on the influence of performance contracting policy on the implementation of performance contracting. The objective of this study was to assess the influence of public budget financing, performance contracting policy, and participatory management on the implementation of performance contracting in National Government Constituency Development Fund. A conceptual framework was developed to link public budget financing, performance contracting policy and participatory management to the implementation of performance contracting. The study was anchored on Agency theory. This study used an explanatory and descriptive quantitative approach. The target population was Fund Account Managers who manage the fund in the 290 constituencies in Kenya, and a census survey was used. Primary data was collected using structured questionnaires. The study to some extent was affected by the COVID pandemic in that only a limited number of managers could attend a workshop at any one time. This was mitigated by having questionnaires emailed to the managers who had not attended the workshop to ensure that they were able to complete the survey. Nonetheless, sufficient data was gathered to enable the research objectives to be achieved. Data was analyzed using SPSS software where various data analysis techniques including Pearson’s Correlation Coefficients and Regression Analysis were employed. The relationship between public budget financing and implementation of performance contracting was positive, but not significant. However, performance contracting policy and participatory management had a positive and significant relationship with the implementation of performance contracting. The study recommends that the National Government Constituency Development Fund Board should develop policies to enhance the implementation of performance contracting and adopt participatory management practices in their operations. Further research should be undertaken to establish other factors that influence the implementation of performance contracting in National Government Constituency Development Fund.