The fastest way to stay broke in this business is to charge one-time project fees. You build a $1,500 agent, you get paid once, and next month you're hunting again. The model that actually works is setup fee plus monthly retainer, every single time. One pays for the build, the other pays your rent.
Here are the numbers and how to structure them.
The two-part price
Setup fee: $1,000 to $2,000 for a standard build, up to $6,000 when it's complex or the client is bigger. This covers your time configuring the agent, writing the prompts, connecting the calendar and the phone number, and testing it.
Monthly retainer: $750 to $850 minimum, and that's your floor, not your ceiling. This covers monitoring, tweaks, call review, and the fact that you are now responsible for their phone. Never go below $750. A $300 retainer attracts clients who treat you like a $300 vendor and churn in two months.
The anchor I say out loud: "$6k to set up and $750 a month is about $9k for the year. You'd have to miss two jobs in twelve months for this to be expensive, and you're missing two a month." When the retainer is framed against the jobs it saves, it stops being a cost.
Why you always charge setup AND monthly
The setup fee filters. Anyone who won't pay $1,000 up front will be a nightmare client who nickels-and-dimes you forever. It also front-loads cash so you're not building for free hoping the retainer sticks.
The retainer is the actual business. It turns you from a freelancer who sells builds into an agency with recurring revenue. Ten clients at $850 a month is $8,500 recurring, that's real. Ten one-time builds is ten times you had to go find the next deal. Charge both, always.
What to bundle so the price feels obvious
Don't sell "an AI agent." Sell the outcome and stack the deliverables so the value is visible:
- After-hours and overflow call answering, so no call hits voicemail
- Appointment booking straight onto their calendar
- Caller name, number, and job type captured and texted to them instantly
- A monthly call summary so they see exactly what you caught
Same agent, but now it's four things they can point at, not one abstract thing. The retainer justifies itself because they can see what they'd lose if they cancelled.
Don't lead with the big number
This is the Boiling Frog move. On the first sale, don't quote $6,000. Land them on a $500 after-hours agent, prove it catches real calls, then raise price as trust builds. A cold prospect won't hand a stranger $6k. A client who watched your $500 agent book three jobs last month will happily go to $850 a month and a bigger scope.
Start small, deliver, then climb. The price you can charge is a function of the trust you've earned, and trust comes from results they've already seen.
Never discount the retainer
If they push on price, cut scope, not the monthly. Drop a feature, shorten the term, remove the monthly report. But hold the $750 floor. The retainer is the number that keeps your business alive, and the client who talks you down on it is telling you exactly how they'll treat you for the next year.
Get your setup and retainer numbers written down before your next call so you're not inventing them live. Bring your package to the Wednesday live and we'll pressure-test what you're bundling and what you're charging.