Definition
What is retainer billing?
Retainer billing is a model where a client pays a recurring fee, usually monthly, to keep a service provider engaged on an ongoing basis. In exchange the client receives an agreed amount of work, capacity, or access each period. It gives the provider predictable recurring revenue and gives the client reserved availability without negotiating a new contract every time.
How retainer billing works
The client and provider agree on a fixed recurring fee and what it covers each period. That can be a set number of hours, a defined scope of ongoing work, or simply priority access to the provider's time. The fee is charged on a schedule, most commonly monthly, and continues until the retainer is changed or ended.
Common types of retainer
Retainers usually fall into a few patterns, and firms often blend them:
- Hours-based: a fixed number of hours reserved each period, sometimes with rollover rules
- Scope-based: an agreed set of ongoing deliverables for a flat monthly fee
- Access or availability: the client pays to keep the provider on call for priority work
Retainer billing versus project billing
Project billing charges for a defined piece of work with a start and an end. Retainer billing is ongoing and recurring, with no fixed endpoint until someone changes it. Retainers smooth revenue and deepen client relationships, but they need clear boundaries on what is included so scope does not quietly expand beyond the fee.
How this works in Belvak
Belvak supports recurring work through recurring projects and maintenance contracts. You set the per-period amount and billing frequency, and each period queues up for your approval before it is invoiced, so a retainer bills on schedule while you stay in control of what goes out.
FAQ
Frequently asked questions
What is the difference between a retainer and a project fee?
A project fee covers a defined piece of work with a clear start and end. A retainer is a recurring fee that keeps the provider engaged on an ongoing basis, with no fixed endpoint until it is changed or ended.
How is a retainer usually billed?
Most retainers are billed monthly at a fixed fee. Each period covers an agreed amount of work, hours, or availability, and billing repeats until the arrangement is adjusted.
Why do service firms use retainers?
Retainers create predictable recurring revenue and reserve capacity for the client. They deepen the relationship, but they need clear scope boundaries so the included work stays aligned with the fee.