Why More Agencies Are Ditching Project Invoices for Retainers

Retainers are now the primary billing model for 78% of agencies, up from 64% just three years ago. That's not a fad — it's agencies figuring out, in real numbers, that a client who pays every month is worth a lot more than a client who pays once.

The Shift Is Real, and It's Fast

The 78%-and-rising figure comes from a Digital Agency Network survey, and it isn't an outlier: a separate 2025 SE Ranking survey found 78.2% of SEO agencies specifically charge monthly retainers. Promethean Research's 2025 Digital Agency Industry Report breaks the market down further — 95% of agencies still do some project work, 91% offer retainers, and 88% offer both, which tells you retainers aren't replacing projects so much as absorbing the ongoing relationship that used to get re-invoiced from scratch every time. (Sources: GigRadar, Retainer Pricing in 2026; Taskip, Retainer vs. Project-Based Pricing.)

Why Retainers Actually Pay Better

The financial case is more specific than "recurring revenue is nice." Retainer clients carry a lifetime value 3 to 5 times higher than one-off project clients — largely because they simply stay longer: an average of 56 months on a retainer versus 24 months for a project relationship. Agencies whose revenue is retainer-dominant report 35 to 40 percent more predictable monthly income than project-dependent peers, and they retain clients at roughly 2.3 times the rate of project-only shops. Top-performing retainer agencies hold annual churn to 8–10%. (Source: Rocketlane, What Is a Retainer? A Complete Guide.)

None of that is really about the client being more loyal. It's that a retainer removes the recurring cost of re-selling the relationship — no new estimate, no new negotiation, no gap in the calendar between "project ends" and "next project starts" where a client quietly finds someone else.

It's Not All or Nothing

The data doesn't say projects are dead. Project-based pricing is still used by 48.9% of SEO agencies for exactly the work it fits — one-time deliverables like a website rebuild, a brand audit, a single campaign. The pattern that's actually winning is a hybrid one: a project to start the relationship and prove the work, a retainer to grow it once trust is established. Foxwell Digital's 2026 State of Agencies survey found 28% of top-performing agencies now layer a performance component onto at least one client retainer — a hint that the model itself is still evolving, not settling. (Sources: Pitchsite, Retainer vs. Project Pricing; theStacc, Agency Pricing Models.)

What BillGrid Does Today

Recurring billing in BillGrid isn't a bolt-on — a subscription can run weekly, every few weeks, monthly, quarterly, twice a year, or annually, generating and sending the invoice automatically on schedule, ready for the client to pay by card through Stripe. Each subscription ties back to a project, and a project can carry its own budget — a total dollar amount, an hourly rate, or a set number of hours — so a retainer isn't just "bill this amount every month," it's linked to the actual scope of work behind it.