This article focuses on the economics of quality assurance in legal translations. This article first provides an overview of cost-benefit analysis in legal translation and discusses the decision-making process in this economic activity. What follows is a discussion based on the importance of quality assurance in decision-making. Due to globalization, internationalization, and the ever-increasing demand for services or business overseas, legal translation is more important than ever. Without high-quality legal translation, countries cannot communicate due to language differences, and legal translators are essential to perform their duties correctly. Today, legal translation is no longer an option but a necessity. However, legal translation is an almost art profession that requires translators to have language proficiency and good legal knowledge, and we must always find a balance between quality control strategies and related costs. A topic we must pay attention to. Improving productivity and efficiency, conserving our resources, and improving translation quality are all goals to expand and expand language options. To sum up, if we want to lead the evolution of legal translation and predict future trends, we need to do more research, track new technologies, and understand how the processes and economics work so that we can understand subsequent developments in the legal translation market will come.