# Calculate refund amount preview

Calculates the refund amount that would be issued if a specific subscription order fulfillment were refunded. This provides a preview without actually processing the refund.

What it calculates:
- Total refund amount (order amount minus processing fees)
- Restocking fees (if applicable)
- Gateway fees that cannot be refunded
- Net refund amount customer will receive

Use Cases:
- Show customer how much they'll get back before confirming refund
- Display refund breakdown in customer portal
- Validate refund eligibility

Important Notes:
- This is a preview only - does not process refund
- Refund amount may vary based on payment gateway
- Some gateways don't refund processing fees
- Refunds can only be issued for fulfilled orders

Authentication: Customer must be logged in and own the subscription

Endpoint: GET /subscriptions/cp/api/subscription-billing-attempts/refund-preview/{id}
Version: 0.0.1

## Path parameters:

  - `id` (integer, required)
    Billing attempt ID

## Query parameters:

  - `subscriptionContractId` (integer)
    Subscription contract ID for validation


## Response 200 fields