The objective of this research is to study the cost and return management of safe shrimp farming in Nakhon Pathom Province, Thailand. This research is used as a guideline for reducing the cost of raising giant freshwater prawns in clay ponds for shrimp farmers in Huai Muang Subdistrict, Kamphaeng Saen District, Nakhon Pathom Province, Thailand. Kamphaeng Saen District is the area with the most shrimp production for the market and shrimp farming is still the main occupation of farmers. The study revealed that 1. The payback period of the project is the period of time that makes shrimp farming safe and gives a return worth the investment, which is 2.02 years. 2. The payback period of the project that takes into account the present value when cash flows are calculated into the present value at the discount rate. A value of 7% is 2.48 years. 3. Net Present Value is 1,217,815 baht. 4. Benefit Cost Ratio is 1.82, which is greater than 1. Moreover, 5. the internal rate of return is 44.17%, indicating the ability of the funds to generate income from safe shrimp farming that is worth the investment.