Lifelong learning is a key factor in business development in today's modern world, and we highlighted the reasons for this in the theoretical part of the paper. Accelerated technological progress, market globalization and changes in business models require continuous training of employees so that the company can remain competitive. The importance of lifelong learning stems from the need to adapt to new technologies, work methods and market trends. Lifelong learning enables employees to acquire new knowledge, skills and competences, which makes them more flexible and ready for change. Also, continuous training encourages innovation, creativity and teamwork, which are key success factors in today's business environment. We conducted interviews with respondents from different occupations in order to obtain relevant data and gain a better insight into the research issue. Our interlocutors include andragogic experts, human resources experts, marketing experts and company leaders, some of them working in a multidisciplinary manner. The second part of the research was conducted using the quantitative method through a survey that was created based on the results of the qualitative research. The goal was to survey employees from different sectors, genders, age groups and levels of education in order to investigate the frequency of encounters with lifelong learning and to what extent it affects business development. Combining quantitative and qualitative research methods provides a complete picture of the impact of lifelong learning on business development. The opinion of the respondents is that lifelong learning is a process that is important both for professional development and for personal growth, which takes place through different forms and in different contexts, and is considered essential for adaptation and progress in a fast and constantly changing world. We will especially point out that research has shown that companies definitely need to invest more in encouraging the lifelong learning of their employees. In addition, companies that engage in the learning of their employees often have a better reputation as employers that attract and retain higher quality staff. Continuous investment in learning can create a positive working environment and contribute to the creation of organizations ready for the challenges of the modern business world.