Return the number of remaining jobs that could be submitted to the backend.


The number of remaining jobs for a backend is provider specific. For example, if you have access to the same backend via different providers, the number of remaining jobs might be different for each. See BackendJobLimit for the job limit information of a backend.

If None is returned, there are no limits to the maximum number of active jobs you could have on the backend.

Return type



The remaining number of jobs a user could submit to the backend, with this provider, before the maximum limit on active jobs is reached.


IBMQBackendApiProtocolError – If an unexpected value is received from the server.