What changed
GitHub announced three linked Copilot administration changes on August 28. New credit-card and PayPal Copilot Business and Enterprise customers begin returning September 1, with new seat assignments requiring payment before access. Existing card and PayPal customers move to upfront charging for all assigned seats at the start of each billing cycle from October 1. No earlier than September 28, GitHub will also merge Copilot cloud agent, Chat on github.com and Mobile Chat into one default-enabled policy; github.com chat data will then be retained for the life of the account instead of 28 days. On the same date, the Default code-review effort setting moves from Lite to Balanced.
Why it matters
The billing change affects cash flow and seat-management behavior without changing headline seat prices: removing a seat does not produce a prorated refund, while mid-cycle additions remain prorated. The policy migration is more consequential for governance because administrators who do nothing will accept a broader unified Copilot surface and much longer chat retention. Teams therefore need to review billing automation, offboarding timing, data-retention expectations and code-review defaults before the September and October cutovers.
Seat assignment becomes a payment event
Starting September 1, new Copilot Business and Enterprise seat assignments for newly reenabled credit-card and PayPal customers require payment before the user receives access. Existing card and PayPal customers move to upfront seat charging at the start of their billing cycle from October 1. GitHub says plan prices are not changing, mid-cycle additions remain prorated, and revoked seats do not receive a prorated refund.
The unified policy changes the default governance posture
No earlier than September 28, Copilot cloud agent, Chat on github.com and Chat in GitHub Mobile are scheduled to become one unified Copilot experience controlled by one policy. The unified experience will be enabled by default. Organizations that opt out lose Copilot access on github.com and Mobile after launch, so administrators need to make an explicit governance decision rather than assume existing per-surface choices will persist.
Chat retention moves from 28 days to account lifetime
As github.com Chat moves onto the agent-sessions experience, GitHub says chat data will be kept for the life of the account instead of 28 days. That is a material change for organizations whose internal policies or user expectations were built around the shorter retention period. Teams should review what developers place into Copilot conversations and whether the new retention model fits their data-handling requirements.
Code review becomes more thorough by default
GitHub is also changing the Default Copilot code-review effort from Lite to Balanced on September 28. Organizations and repositories that explicitly select Lite will stay on Lite, but any setting left at Default will inherit Balanced. That can change review depth and potentially AI-credit or Actions consumption, so teams should test the operational effect rather than treat the label as cosmetic.