Donor CRM implementation typically takes 3-6 months for a comprehensive solution including requirements gathering (2-3 weeks), platform development with contact management, giving history, communication tools (10-14 weeks), data migration from spreadsheets/legacy systems cleaning duplicates (3-4 weeks), integration with email marketing and payment processors (2-3 weeks), and staff training (2-3 weeks). Basic CRM with core features can launch in 2-3 months. Implementation time varies based on data volume, customization, and integration complexity. We use phased rollout minimizing disruption.