> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hyzl.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Credits & Billing

> How AI Calling credits work and how to manage your balance.

## How credits are used

AI Calling deducts **one credit per call attempt that reaches the network**: answered, voicemail, or ringing with no answer. AI Calling reserves the credit when it dispatches the call. hyzl refunds a call that never gets through automatically. Those are the statuses **Failed**, **Cancelled**, and **DNC** (filtered out by Do Not Call list).

| Outcome                               | Credits Used |
| ------------------------------------- | ------------ |
| Answered, full conversation           | 1            |
| Answered, contact hung up immediately | 1            |
| Missed, voicemail left                | 1            |
| Missed, no voicemail                  | 1            |
| Failed to connect (status: Failed)    | 0, refunded  |
| Cancelled before connection           | 0, refunded  |
| Filtered by DNC list                  | 0, refunded  |

### Contacts vs. call attempts

hyzl deducts a credit per **call attempt**, not per contact. A single contact can therefore use more than one credit. If a contact has fallback numbers (`phone2`, `phone3`, …), hyzl dials each number in turn until one connects. **Every attempt that connects costs a credit**. hyzl refunds attempts that do not connect, as usual.

This means a campaign's credit cost can be higher than its contact count. When you reach the **Send** step, the portal shows the maximum number of calls the campaign could use. That maximum is contacts × multi-number dialing. If your remaining balance cannot cover it, the portal warns you before launch.

## View your balance

Your account balance and usage breakdown live under your **Account** page. Click the gear icon at the bottom of the sidebar to open Settings, then choose **Billing**.

## Monthly allotment

Your subscription plan includes a set number of credits per month. The allotment resets on your billing cycle date. Unused credits do not carry over.

## Buy more credits

To buy more credits, click the **Buy Credits** button at the bottom of the sidebar and choose a credit package. hyzl adds the credits immediately, and they do not expire within the current billing period.

## Auto top-off during retries

Campaigns with [Missed Call Retry](/docs/ai-calling/creating-a-campaign/follow-ups#retry-missed-calls) turned on can automatically purchase credits when your balance runs out mid-retry. A retry schedule then never stalls on an empty balance.

In the campaign's **Missed Call Retry** panel, turn on auto top-off and set a **spend cap**. The cap is the most hyzl may spend on automatic purchases for that campaign. Auto top-off requires a payment method on file.

## Team credit allotments

If you are a team owner, you can allocate credits to individual team members. Each member draws from their allotment independently. See [Teams → Campaign Management](/docs/teams/campaign-management) for details.