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

# Billing and usage

> Check unexpected usage, plan renewals, number charges and disputed records.

## An estimate differs from the invoice

The public calculator models each call as a one-minute session. Actual voice usage comes from connected call time. Messaging, number rental, carrier, destination and third-party charges may be separate.

Compare the estimate with:

* the active plan and billing period;
* connected call duration;
* voice minutes above the plan allowance;
* chat, WhatsApp and SMS usage;
* active phone-number rentals; and
* destination or third-party charges.

## Usage increased unexpectedly

Review call and conversation records for a newly launched campaign, more parallel calls, repeated messages or a workflow that ran more often than intended. Pause the relevant campaign or automation while you investigate.

## A number is still being billed

Releasing a number can take effect at the end of its current billing period. Confirm its status in the dashboard before assuming that the rental has ended.

## Report a record that looks wrong

[Contact Supported.tech](https://www.supported.tech/contact) with the account email, invoice or usage period, and the relevant call or conversation IDs. Do not send passwords, full payment details or private API credentials.

See [Plans and pricing](/pricing/overview) and [Voice and messaging usage](/pricing/usage-based) for the public rates and examples.