How to Rebill AI Voice Minutes, Messages and Phone Numbers to Clients
Rebilling AI voice minutes means charging each client a per-minute rate above your platform cost, tracked automatically per sub-account. On Assistantz.ai the base is from 9¢ per minute all-in; agencies typically bill clients 15¢ to 25¢, and the platform meters minutes, messages and phone numbers per client and connects to Stripe so usage is invoiced without spreadsheets.
Why usage must be rebilled, not absorbed
A flat monthly fee works until one client’s call volume triples. If usage is inside your flat price, that client eats the margin of three others. Rebilling makes each client pay for their own minutes, keeps your margin per client constant, and turns growth in call volume into growth in revenue.
What can be rebilled on Assistantz.ai
- Voice minutes above the 9¢ per minute all-in base (from 10.5¢ if you use platform telephony instead of your own SIP trunk).
- Chat and SMS messages at a per-message price you set, above the 2¢ platform cost (or above $0 if the client uses their own OpenAI or other LLM key).
- Phone numbers, local or toll-free, at a monthly rate you set.
The platform tracks all three per client automatically.
The maths
| Client minutes / month | Your cost at 9¢ | Billed at 15¢ | Billed at 20¢ | Margin at 20¢ |
|---|---|---|---|---|
| 300 | $27 | $45 | $60 | $33 |
| 600 | $54 | $90 | $120 | $66 |
| 1,500 | $135 | $225 | $300 | $165 |
| 3,000 | $270 | $450 | $600 | $330 |
The 9¢ is all-in: orchestration, your choice of voice, your choice of language model and telephony. Bring your own SIP trunk to keep telephony at $0; on platform telephony add 1.5¢ a minute to the cost column above.
How to set it up
- Connect your Stripe account in Assistantz.ai (knowledge base step 1.3).
- Activate your agency wallet for AI call and chat billing (step 1.4).
- Set up client rebilling and each client’s wallet (step 1.6): choose the per-minute, per-message and per-number rates.
- Clients top up their wallet or are invoiced; usage draws down automatically and you keep the difference.
What to tell the client
Present usage as a utility line on the invoice: “AI calls: 612 minutes at $0.20.” Business owners understand paying for calls; they do not want to understand tokens. Pair it with the outcome report from GoHighLevel tags — calls answered, appointments booked — so the line item always sits next to the value it produced.
Frequently asked
Can I bundle minutes into a plan? Yes. Many agencies include 300 minutes in a $199 plan and bill overage at their per-minute rate.
Do I need GoHighLevel SaaS mode? No. Assistantz.ai rebilling is independent of SaaS mode, so it works on any GHL plan.
Is the base rate really 9¢? Yes, all-in, with your own SIP trunk for $0 telephony. See the pricing page.
