The objective of the study was to establish the determinants of implementation of cash transfer programme for elderly persons in Kiambu County, Kenya. Three specific objectives guided the study: investigating how enrolment process of beneficiaries determine implementation of cash transfer program for the elderly; finding out how staff capacity determines the implementation of cash transfer program for the elderly; and assessing how modes of payment determine implementation of cash transfer program for the elderly. The study was based on Progressive Utilization theory advanced by Prabhat Ranjan. The study employed descriptive research design with study population as the elderly persons registered as beneficiaries of elderly Persons Cash Transfer Programme in Kiambu County. The study population was 72,132 elderly persons. The study used purposive sampling, stratified random sampling and proportionate stratified sampling to get a sample size of 380 respondents from four sub counties in Kiambu County. Data was collected through questionnaires. The study employed descriptive and inferential statistics to analyze data since both quantitative and qualitative data was collected. The analyzed data was done through the use of SPSS and presented in frequency tables, graphs and pie charts. The overall response rate was thus found to be 70.53% which is quite ideal for the study. Findings revealed that enrolment process had the strongest relationship with implementation of elderly cash transfer programme. Modes of payment had the second highest relationship. Staff capacity had the least strong relationship with implementation process. Findings showed that there is a strong relationship between modes of payment, staff capacity, enrolment process and implementation of elderly cash transfer programme. Findings also revealed that enrolment process, staff capacity and modes of payment had a positive linearly significant influence on implementation of elderly cash transfer programme. The study concluded that there is a positive and significant relationship between enrolment process, staff capacity and modes of payment and implementation of elderly cash transfer programme. The study recommended that streamlining and strengthening the enrolment process will lead an effective and efficient implementation of elderly cash transfer programme. The study recommended there is need for enhancing the capacity of the staff through training in order to equip them with skills to implement the programme. The study recommended for smoothening of the challenges of payment of the stipends through investing more on innovative payment schedules and programmes. An area for further study is the need to cascade similar studies in other counties for comparative analysis.