Power BI consultants often face challenges such as integrating data from multiple, sometimes incompatible, sources. Managing large datasets or handling complex calculations in DAX can impact performance, requiring optimization techniques. Power BI consulting must also ensure proper data governance, making sure data is accurate and aligned with business needs. Additionally, the evolving nature of Power BI features demands continuous learning and adaptation. Ensuring smooth collaboration with stakeholders and translating business requirements into effective reports is another challenge, requiring a mix of technical expertise and communication skills.