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

# Subaccounts

> Segment usage, isolate traffic, and manage multi-tenant architectures

Subaccounts let you create isolated environments under your main Plivo account.

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## How Subaccounts Work

Each subaccount has:

* Unique Auth ID and Auth Token
* Separate call/message logs
* Independent webhooks

All charges deduct from the parent account balance.

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## Use Cases

| Use Case                   | Description                                     |
| -------------------------- | ----------------------------------------------- |
| **Multi-tenant SaaS**      | Isolate each customer's traffic and logs        |
| **Reseller/White-label**   | Manage client accounts, track usage for billing |
| **Environment separation** | Separate dev, staging, production               |
| **Department tracking**    | Track usage by business unit                    |

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## Billing

Subaccounts share the main account's credit balance:

* All charges deduct from main account
* No separate payment methods per subaccount
* Track usage per subaccount via API for client invoicing

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## Credentials

| Account Type | Auth ID Prefix | Access                          |
| ------------ | -------------- | ------------------------------- |
| Main account | `MA`           | All resources + all subaccounts |
| Subaccount   | `SA`           | Only its own resources          |

Subaccounts cannot access main account or other subaccount resources.

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## Phone Numbers

* Assign numbers when renting or transfer later
* Each number belongs to one account only
* Numbers transfer to main account when subaccount deleted (unless cascade=true)

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## Related

* [Subaccount API Reference](/account/api/subaccount)