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

# How fixed-amount coupons are applied to invoice charges

> Understand how fixed-amount coupon discounts are allocated across eligible invoice charges and how to identify usage-based overages.

export const plans_0 = "Pro"

export const deployments_0 = "Braintrust-hosted"

export const data_plane_version_0 = undefined

export const use_case_0 = "Use case - Understand how a fixed-amount Pro coupon is allocated across invoice charges and identify usage-based overages"

<Note>
  **Applies to:**

  * Plan - {plans_0}
  * Deployment - {deployments_0}
  * {data_plane_version_0}
  * {use_case_0}
</Note>

## Summary

This guide applies to fixed-amount coupons, such as a coupon worth \$249. It does not apply to percentage-based coupons.

A fixed-amount coupon reduces your invoice by its specified discount amount. It does not increase your plan's included usage or apply exclusively to the Pro platform-fee.

Braintrust allocates the coupon across eligible invoice charges. If your platform fee and usage-based charges add up to more than the coupon value, the remaining amount is still payable. Depending on how the discount is allocated, the invoice may show part of the platform fee as uncovered even though the remaining balance represents usage beyond your plan's included limits.

## How coupon allocation works

Consider an invoice with a \$249 Pro platform fee, \$5 of usage beyond the plan's included limits, and a fixed-amount coupon worth \$249:

| Invoice item                            | Amount |
| --------------------------------------- | -----: |
| Usage beyond the plan's included limits |    \$5 |
| Coupon applied to usage                 |   -\$5 |
| Pro platform fee                        |  \$249 |
| Coupon applied to platform fee          | -\$244 |
| Total coupon discount                   | -\$249 |
| Remaining amount due                    |    \$5 |

In this example, \$5 of the coupon is allocated to usage and the remaining \$244 is allocated to the platform fee. This leaves \$5 of the platform-fee line uncovered.

You still received the full \$249 coupon discount. The remaining invoice total corresponds to charges above the coupon's value, even though the invoice presents the balance against the platform-fee line.

A fixed-amount coupon is a monetary discount. It does not add model credits, increase included usage limits, or prevent usage-based overage charges.

## Review your invoices

1. Go to **<Icon icon="settings-2" /> Settings** > [**<Icon icon="credit-card" /> Billing**](https://www.braintrust.dev/app/~/configuration/org/billing).
2. Open the **Invoices** dropdown in the upper-right corner.
3. Select the invoice you want to review.
4. The invoice opens in the Orb billing portal, where you can review its billing period, line items, discounts, total, and payment status.

## Compare your invoice with your usage

On the **Billing** page, scroll down to **Usage analytics**.

The available charts include:

* **Logs usage**.
* **Scores usage**.
* **Topics input tokens**.
* **Topics output tokens**.

Use the **Daily** view to identify usage recorded on individual days. This view displays charts such as **Daily logs usage** and **Daily scores usage**.

To review usage for the relevant billing period:

1. On the left, select **Cumulative**.
2. On the right, select **This month**, or select **Custom** when reviewing a historical invoice.
3. Review the cumulative logs, scores, Topics input-token, and Topics output-token charts.
4. Compare the totals with the usage lines and billing period shown on the invoice.

The cumulative view helps explain how usage built up during the month.

Topics and built-in models draw from the same [monthly model credit](/docs/plans-and-limits#model-credits). After that credit is exhausted, additional token usage is [billed at the on-demand rates](/docs/admin/billing/faq#what-happens-when-i-run-out-of-topics-credit).

For more information, see:

* [Redeem a coupon](/docs/admin/billing/change-plan#redeem-a-coupon)
* [Monitor usage](/docs/admin/billing/monitor-usage)
* [Plans and limits](/docs/plans-and-limits)
* [What happens when I run out of Topics credit?](/docs/admin/billing/faq#what-happens-when-i-run-out-of-topics-credit)