Definition
An AI automation retainer is a recurring monthly fee a client pays an agency to keep its AI agents running, maintained, and improved after the initial build.
In practice
The retainer is where an automation agency's economics live. A setup fee pays for the build once; the retainer pays for everything that keeps the build useful: hosting and model usage, fixes when a site or a model changes, checks on spend and output, and a regular review with the client. The simplest pricing rule is to divide your monthly delivery cost by one minus your target margin. The common mistake is setting the retainer to cover hosting alone and then absorbing hours of maintenance for free. Price the attention, not just the infrastructure.
Example
Keeping one client's agent running costs an agency about $99 a month all-in: the hosting for the client's environment, the agent's model usage, and a short monthly check-in. At a 70 percent target margin the retainer is $99 divided by 0.3, which is $330 a month. Ten clients on the same numbers bring in $3,300 of monthly recurring revenue, about $2,310 of it gross margin.
Common questions about AI automation retainer
How do you calculate an AI automation retainer?
Add up what one client costs you each month, including hosting, model usage, and your own time, then divide by one minus your target margin. At $99 of monthly cost and a 70 percent margin, the AI automation retainer comes to $330. The agency pricing calculator does the same math with your own numbers.
What should an AI automation retainer cover?
An AI automation retainer should cover everything after the build: hosting and model usage, fixes when models, APIs, or websites change, checks on spend and output quality, and a regular review with the client. If it only covers hosting, the maintenance hours come out of your margin instead of the client's fee.
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