Agency Retainer Models Hour-based retainers: Prepaid hours each month Project-based: Set deliverables per period Access-based: Priority support and availability Hybrid models: Base services plus project work Key Retainer Terms Minimum commitment period (typically 3-6 months), rollover policies for unused hours, rate adjustment schedules, and scope limitations. Pricing Strategies Discount retainer rates 10-20% vs. project rates to incentivize commitment while maintaining profitability through predictability.