How Often Does Tor Automatically Change Circuits?

The Tor network protects online anonymity by routing internet traffic through a chain of three encrypted relays known as a circuit. To prevent eavesdroppers from linking different activities to the same identity over extended periods, Tor automatically changes these circuits every 10 minutes by default. However, several operational factors—such as active downloads, tab isolation, and manual user requests—can modify exactly how and when circuit transitions occur.

The 10-Minute Rotation Cycle

Tor uses an internal timer to manage circuit lifecycles. Once a circuit is first used to transmit data, Tor marks it as “dirty.” The software will continue to assign new outbound requests to this circuit for up to 10 minutes. Once the 10-minute threshold is reached, Tor marks the circuit as expired, builds a new one using different relays, and assigns all subsequent network requests to the new path.

How Active Connections Are Handled

Circuit rotation does not abruptly sever active connections. If you are downloading a large file, streaming media, or actively submitting a form when the 10-minute timer expires, Tor keeps the old circuit open exclusively for that ongoing stream until it finishes. Any new requests or website loads made after the 10-minute mark will automatically use the newly created circuit.

Domain-Level Circuit Isolation

Modern versions of the Tor Browser employ “First-Party Isolation.” Instead of routing all your open browser tabs through a single shared circuit, the browser automatically builds a unique circuit for every individual domain you visit. If you have three different websites open simultaneously, Tor maintains three distinct circuits at the same time, rotating each one independently on its own 10-minute schedule.

Manual Circuit Reset Options

While automatic rotation happens every 10 minutes, users can manually force a circuit change at any moment within the Tor Browser: