---
id: 'manage-usage-advanced-mfa-phone'
title: 'Manage Advanced MFA Phone usage'
---

## What you are charged for

You are charged for having the feature [Advanced Multi-Factor Authentication Phone](/docs/guides/auth/auth-mfa/phone) enabled for your project.

<Admonition type="note">

The Advanced MFA Phone add-on is **not** covered by the [Spend Cap](/docs/guides/platform/cost-control#spend-cap).

</Admonition>

<Admonition type="note">

Additional charges apply for each SMS or WhatsApp message sent, depending on your third-party messaging provider (such as Twilio or MessageBird).

</Admonition>

## How charges are calculated

MFA Phone is charged by the hour, meaning you are charged for the exact number of hours that the feature is enabled for a project. If the feature is enabled for part of an hour, you are still charged for the full hour.

### Example

Your billing cycle runs from January 1 to January 31. On January 10 at 4:30 PM, you enable the MFA Phone feature for your project. At the end of the billing cycle you are billed for 512 hours.

| Time Window                                 | MFA Phone | Hours Billed | Description         |
| ------------------------------------------- | --------- | ------------ | ------------------- |
| January 1, 00:00 AM - January 10, 4:00 PM   | Disabled  | 0            |                     |
| January 10, 04:00 PM - January 10, 4:30 PM  | Disabled  | 0            |                     |
| January 10, 04:30 PM - January 10, 5:00 PM  | Enabled   | 1            | full hour is billed |
| January 10, 05:00 PM - January 31, 23:59 PM | Enabled   | 511          |                     |

### Usage on your invoice

Usage is shown as "Auth MFA Phone Hours" on your invoice.

## Pricing

<$Partial path="billing/pricing/pricing_mfa_phone.mdx" />

## Billing examples

### One project

The project has MFA Phone activated throughout the entire billing cycle.

| Line Item                     | Hours | Costs                     |
| ----------------------------- | ----- | ------------------------- |
| Pro Plan                      | -     | <Price price="25" />      |
| Compute Hours Micro Project 1 | 744   | <Price price="10" />      |
| MFA Phone Hours               | 744   | <Price price="75" />      |
| **Subtotal**                  |       | **<Price price="110" />** |
| Compute Credits               |       | -<Price price="10" />     |
| **Total**                     |       | **<Price price="100" />** |

### Multiple projects

All projects have MFA Phone activated throughout the entire billing cycle.

| Line Item                     | Hours | Costs                     |
| ----------------------------- | ----- | ------------------------- |
| Pro Plan                      | -     | <Price price="25" />      |
|                               |       |                           |
| Compute Hours Micro Project 1 | 744   | <Price price="10" />      |
| MFA Phone Hours Project 1     | 744   | <Price price="75" />      |
|                               |       |                           |
| Compute Hours Micro Project 2 | 744   | <Price price="10" />      |
| MFA Phone Hours Project 2     | 744   | <Price price="10" />      |
|                               |       |                           |
| Compute Hours Micro Project 3 | 744   | <Price price="10" />      |
| MFA Phone Hours Project 3     | 744   | <Price price="10" />      |
|                               |       |                           |
| **Subtotal**                  |       | **<Price price="150" />** |
| Compute Credits               |       | -<Price price="10" />     |
| **Total**                     |       | **<Price price="140" />** |

### Add-on disabled after a day

Project add-ons are billed in arrears based on how many hours you used them.
If you remove the MFA Phone add-on, you are no longer billed from the time of removal onward.

| Line Item                     | Hours | Costs                       |
| ----------------------------- | ----- | --------------------------- |
| Pro Plan                      | -     | <Price price="25" />        |
|                               |       |                             |
| Compute Hours Micro Project 1 | 744   | <Price price="10" />        |
| MFA Phone Hours Project 1     | 24    | <Price price="2.46" />      |
|                               |       |                             |
| **Subtotal**                  |       | **<Price price="37.46" />** |
| Compute Credits               |       | -<Price price="10" />       |
| **Total**                     |       | **<Price price="27.46" />** |
