Additional Options and Customizations:

Add-on Services: Clients can add specific services like financial planning, digital transformation consulting, HR strategy, or sustainability consulting to any package for an additional fee.

Custom Consulting Solutions: Offer fully customized consulting services for clients with unique needs that don't fit into the predefined packages.

Performance-Based Pricing: For the Premium package, consider incorporating a performance-based pricing model where fees are partly dependent on achieving certain business outcomes. 

Marketing and Promotion of Packages:

Website and Brochures: Clearly outline each package with detailed service descriptions and case studies demonstrating past success.