How Much Should You Invest in Upskilling?

In today's rapidly evolving job market, investing in skills development can significantly impact your career trajectory. What factors do you consider when deciding how much to spend on upskilling? Do you focus more on the cost of the courses, the potential salary increase, or the personal growth opportunities? Do you allocate any annual budget for upskilling? How much % of annual income do you spend on upskilling? Share your thoughts and experiences!