# GitHub Copilot request-based billing for annual plan subscribers (legacy)

Find information about GitHub Copilot's legacy premium request-based billing model if you're a Copilot Pro and Copilot Pro+ subscriber on an annual plan.

## Links

* [What changed with Copilot billing (legacy)](/en/copilot/reference/copilot-billing/request-based-billing-legacy/what-changed-with-billing)

  Learn about what changed with billing and what your options are as a Copilot Pro and Copilot Pro+ annual plan subscriber on the legacy billing model.

* [Requests in GitHub Copilot (legacy)](/en/copilot/reference/copilot-billing/request-based-billing-legacy/copilot-requests)

  Learn about requests in Copilot, including premium requests, how they work, and how to manage your usage effectively.

* [Overview of request-based billing (legacy)](/en/copilot/reference/copilot-billing/request-based-billing-legacy/github-copilot-premium-requests)

  Learn how premium requests in Copilot work, including usage measurement and managing your budget.

* [Monitoring your GitHub Copilot usage and entitlements (legacy)](/en/copilot/reference/copilot-billing/request-based-billing-legacy/monitor-premium-requests)

  Learn how you can monitor your monthly usage of Copilot and get the most value out of your Copilot plan.

* [Model multipliers for annual plans on request-based billing (legacy)](/en/copilot/reference/copilot-billing/request-based-billing-legacy/model-multipliers-for-annual-plans)

  Model multipliers for Copilot Pro and Copilot Pro+ subscribers staying on annual plans under request-based billing.