Fast access follows deposit finality
Circle advertises cross-chain access in under 500 milliseconds once the deposit has finalized and the balance is established. That estimate excludes the initial funding wait and is not guaranteed. Its confirmation table lists an average of roughly 13 to 19 minutes for an Ethereum deposit before Gateway updates the balance or issues an attestation.
A separate seven-day withdrawal option lets holders reclaim funds directly from the Gateway Wallet contract without relying on Circle’s API. Circle’s asset documentation explicitly extends that withdrawal delay to cirBTC. It is a fallback exit, rather than the ordinary transfer time between Ethereum and Arc.
Crypto’s August 2025 Gateway report also describes API-independent recovery after seven days.
Circle says cirBTC is backed one-for-one by native Bitcoin held at a regulated entity in its corporate group, with the $BTC segregated from corporate assets for holders.
Gateway integration is described as permissionless, with no sign-up required. Access to cirBTC through Circle Mint, however, is offered to qualified businesses. Withdrawing cirBTC from Gateway leaves the holder with the token; redeeming it for native Bitcoin uses a separate Mint process in which Circle burns cirBTC and releases $BTC to a Bitcoin address.
Costs also depend on the operation. Circle’s announcement says Gateway fees for cirBTC and $EURC are waived on Arc at launch and quotes a one-basis-point rate outside Arc. Those rates are not an all-in transfer cost: Circle’s fee documentation lists gas and optional forwarding charges too. cirBTC transfer costs are paid in cirBTC.