Management prioritizes organizational and employee development efforts tied to both the strategic and business planning processes. Although such factors have been effected, there are other factors which need to be put into consideration since most organizations tend to allocate less money to their training merely because they don’t know the criteria to use. This provoked the researchers to conduct a research on the factors determining training budget allocation in commercial banks. The study adopted survey research design and the participants were the managers and departmental supervisors of all the ten commercial banks in Nyeri Municipality. Structured questionnaires were used to collect data which was analyzed using inferential statistics. P-value was be used to test the hypothesis. The variables investigated were; size of the organization, employee entry characteristics, organization policy and cost of investment. These factors were found to have an influence in determining training budget allocation in commercial banks and in addition, from the regression model, these variables were significant in causing variations to the dependent variable, which is, training budget allocation in banks.