Niche Expertise Castro & Co specializes exclusively in international taxation with a global partner network, presenting a clear value proposition for clients seeking specialized cross-border tax planning, pre-immigration planning, and offshore compliance.

Cross-Border Services Strong potential for advisory expansion to high-net-worth individuals and multinational corporations seeking Subpart F planning, excess foreign tax credit optimization, transfer pricing, and corporate expatriation strategies.

Global Reach Office presence in major U.S. cities plus partnerships in over 130 countries suggests opportunities to upsell location-based and jurisdiction-specific tax guidance, as well as referral-driven business development.

Financial Scale Mid-market revenue range indicates capacity for longer-term engagements, annual tax planning retainers, and value-based pricing for complex international tax structuring.

Tech Enablement Existing digital stack for marketing and analytics (Google Ads tracking, Facebook Pixel, Mailchimp, etc.) can be leveraged to optimize demand generation for international tax services and to nurture cross-sell opportunities to corporate clients.