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CallingBox is pay-per-minute. You buy credits, they get used when calls connect, and you can see exactly where your money goes in the dashboard.

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Pricing

Rate$0.05 per minute
Free credits$5 with every new account
Billing unitConnected time only
MinimumNone
Ringing, voicemail detection, and unanswered calls don’t cost anything. You only pay for time someone actually picks up.

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Viewing usage

The Billing page shows:
  • Your current credit balance
  • Daily usage chart (minutes per day)
  • Monthly usage totals

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Adding credits

Click Add credits to buy more through Stripe. Credits hit your balance within seconds.
1

Open the dialog

Click Add credits from the Usage page or the sidebar footer.
2

Pick an amount

Choose how much you want and head to checkout.
3

Pay

Stripe handles payment. Your balance updates almost immediately.

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How billing works

When you create a call, CallingBox reserves credits from your balance upfront — the per-call hold. Once the call finishes:
  • If someone answered, you’re charged for the connected time and the unused portion of the hold is released.
  • If nobody answered (no answer, busy, failed), the entire hold is released. No charge.

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Per-call hold

The hold is sized to cover the worst-case cost of a single call (the maximum allowed call duration at the per-minute rate). If your balance falls below the hold, calls pause — both inbound and outbound — even if you still have credits left. Example: if the hold is 3.00∗∗andyourbalanceis∗∗3.00** and your balance is **1.88, the next call is rejected with:
Calls paused. Your balance is 1.88buteachcallrequiresa1.88 but each call requires a 3.00 hold (we release it back if no one answers). Add $1.12 or more in credits to keep calling.
You can see the current hold and your live wallet status on the Billing page.

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Call object billing fields

FieldWhat it is
duration_secondsTotal call duration
billed_duration_secondsThe connected portion you pay for
billing_amount_milli_centsActual charge in milli-cents
reservation_statusreserved, settled, or released
Your credit balance is always in the sidebar. The pill turns amber when you can fit fewer than two more calls before pausing, and red when calls are paused. If you want low-balance alerts, email [email protected].