A storage container is designed to hold water supplies at a specified height to pressurize the water distribution system. Underground, ground-rested, and elevated storage are all options for storing liquids. However, while constructing inexpensive and effective structures from the standpoint of safety and serviceability, structural engineers must adhere to major countries’ codes of practice when designing various types of water tanks. The analysis of an Intze tank in STAAD Pro software for tank full and tank empty conditions using the worst possible load combinations from the Indian code (IS:3370, IS:456), American code (ACI:318 and ACI:350), and British code (BS:8007 and BS:8110) with an equivalent static method using seismic zone-III IS:1893(Part 1):2016 is presented in this paper. Depending on the study results, an Intze tank is designed using software and manual calculations depending on the provided code. When compared to the British and Indian standards, the ACI code predicts a lower strength value and a higher factored load value, resulting in a high building cost. As the cross-section size expands, so does the area of reinforcement and the overall cost. A higher factor of safety value is connected with less trust in the in-situ conditions and workmanship. As a result, the British code is found to be most economical in the design of an Intze tank, followed by the Indian and American codes of practice.