The fees charged by ISO consultants can vary widely based on several factors:

Consultant's Expertise and Experience: Consultants with extensive experience and a strong reputation in ISO standards implementation typically command higher fees.

Scope of Services: The specific services you require will influence the cost. For instance, if you need assistance with gap analysis, documentation development, training, internal audits, certification audits, or ongoing support, each of these services may have a different cost associated with it.

Size and Complexity of Organization: Larger organizations or those with complex operations may require more time and resources from the consultant, thus affecting the overall cost.

Geographical Location: Consultants based in regions with higher living costs or operating expenses may charge higher fees compared to those in less expensive areas.

Consulting Firm vs. Independent Consultant: Consulting firms often have structured pricing models and may charge higher fees due to overhead costs and reputation. Independent consultants might offer more flexible pricing arrangements.

Duration of Engagement: Consultants may charge based on hourly rates, daily rates, project-based fees, or a combination thereof, depending on the duration and intensity of the engagement.

To give you a rough idea, ISO consultants may charge anywhere from $100 to $300 or more per hour, depending on the factors mentioned above. For longer-term projects or comprehensive ISO implementations, they may offer discounted rates or fixed-price packages.

It's best to contact several ISO (International Organization Of Standardization) consultants or consulting firms to discuss your specific needs and obtain detailed proposals with cost estimates. This allows you to compare offerings and choose a consultant or firm that fits your budget and requirements.