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

# Payments & Billing

> How developers pay for gas sponsorship costs

Biconomy uses a **post-paid billing model** for gas sponsorship. You sponsor transactions for your users, and Biconomy invoices you based on actual usage.

## How It Works

1. **You sponsor transactions** — Enable sponsorship in your API calls
2. **Biconomy tracks usage** — All sponsored gas is metered automatically
3. **You receive an invoice** — Pay based on what you used

<Info>
  No prepaid gas tanks or bridging funds to multiple chains. One invoice covers all your sponsored transactions across all networks.
</Info>

## Get Pricing

<Card title="Contact Biconomy" icon="calendar" href="https://calendly.com/d/yh8-xg5-msh">
  Schedule a call to discuss pricing for your application
</Card>