Financial planning encompasses a variety of practices aimed at helping individuals and businesses effectively manage their resources to achieve their goals. This study sought to determine how financial planning techniques affected the Evangelical Lutheran Church in Tanzania, Northern Diocese (ELCT ND) Projects financial performance. The Printing Press, Umoja Hostel, and Uhuru Hotel were these endeavors. Data were collected using qualitative and quantitative methods in a concurrent research design. The studys population consisted of 85 employees directly involved in the projects. As a result, the survey included 31, 27, and 27 respondents for each of the three projects. Because the population was small, a census technique was used in the study to choose all 85 respondents from all the projects. Data were collected using a self administered semi structured questionnaire and a guide for key informant interviews. Test retest reliability was employed to check for reliability, while face to face and content validity was utilized to confirm validity. Frequencies and other descriptive statistics were used to present the data results. Correlation and regression analyses were conducted to determine how financial planning practices affected the projects performance. The studys conclusions indicate that working capital management, inventory management, budgeting, and cash planning strategies all significantly and favorably impact ELCT NDs financial performance. It is concluded that financial planning practices improve project performance. It is recommended that projects keep their liquidity to make sure they can pay their short term debts.