The cost of hiring an ISO consultant varies based on several factors, including the type of ISO standard, company size, consultant experience, geographic location, and scope of services. Typically, hourly rates range from $100 to $300, while daily rates can be between $800 and $2,000. Project-based fees may range from $5,000 to $50,000 or more, depending on complexity and duration. Smaller businesses or less complex projects tend to incur lower costs, whereas larger, more intricate organizations might face higher fees. Consultants may offer package deals or fixed rates for specific services, providing flexibility for different needs.