Putting the spotlight on the Brazilian national grid, Felipe Salcedo and Kevin Porter of Exeter Associates present a case study on inter-regional transmission costs in Brazil on behalf of the Regulatory Assistance Project. The study focuses on the price approval process within the Brazilian transmission system and provides analysis of the regulatory framework installed by the government and relevant agencies. The authors explore industry standards and practices for determining revenue requirements, cost allocation, and rate design for Brazil’s inter-regional electricity transmission lines. The report also delves into methods for calculating transmission costs, how they are allocated to different parties, and how costs are included in retail prices.