# Tax and application fee impact on Monthly Recurring Revenue (MRR) in Billing

### Billing does not consider taxes or `application_fee` to be revenue, so they won't count towards your Monthly Recurring Revenue (MRR), unless taxes are included in the price of your product.
---
### What is an application fee?
An application fee is the fee collected by the platform or third party service that manages your Stripe integration. Stripe has no control over how much you're charged in application fees, so it's best to contact your platform with any questions about the calculation of this fee.