If you have a payment agreement, GCP won't cut you off provide your account is in good behavior in the past. If your only payment method is credit card, IMHO a

If you have a payment agreement, GCP won't cut you off provide your account is in good behavior in the past. If your only payment method is credit card, IMHO allowing a past due account to continue generating cost is a very risky move and an easy target of abusing (imaging stolen credit card etc). Disclaimer: I work for Google Cloud as SRE and have first hand experience dealing with past due account (it was highly manual and not automated).