Service firms rarely rely on a single billing model. Some projects require time and materials, others are set at a fixed fee, and long-term clients may prefer retainers. PSA software supports all of these approaches, giving managers the flexibility to bill clients in the way that best fits each engagement.
📚 Read more: Project revenue and project-based billing methods
With time and materials, billing connects directly to logged hours and expenses, ensuring invoices are always accurate. Fixed-price projects can be tracked against budgets, with PSA systems flagging overruns before profitability is at risk. Retainers are managed through recurring billing cycles, delivering steady revenue without the need for constant manual effort.
📚 Read more: Time-and-material vs fixed-fee contracts
What makes this powerful is that all billing models are tied to the same project and resource data. There is no need to juggle separate spreadsheets or reconcile numbers at the end of the month. For example, a consulting firm might bill one client by the hour, another on a fixed scope, and a third through a monthly retainer.
In Birdview PSA, managers can easily configure rate cards, apply different billing models to different clients, and generate invoices directly from project and resource data. This flexibility allows firms to adapt to client preferences while staying efficient. Managers gain confidence that no matter how work is billed, revenue is accurate, margins are protected, and administrative overhead stays low.
