The business planning process can be considered a strategic phase of any business. Since the business plan is a management accounting tool, countless approaches can be adopted to prepare it since there is no legal requirement other than financial accounting obligations. A general structure usually consists of numerical statements and descriptive notes. This research is based on the authors’ experiences and commonly used theories, and it highlights a standard process that can be adaptable to the business plan of any activity. The use of big data is an essential part of feeding the data of almost all Budget steps. The authors then determine a generally applicable standard process, indicating all the data necessary to prepare an accurate and reliable business plan. A case study will provide adequate support to the demonstration of the immediate applicability of the proposed model.