Which factor does not impact the complexity of an incident?

Cost considerations of responding agencies do not directly impact the complexity of an incident.

Cost considerations, however, play a significant role in the strategic planning and resource allocation of responding agencies within the Incident Command System (ICS). Agencies must balance the need to respond effectively to incidents with the availability of financial and material resources. This balance affects decisions on deploying personnel, acquiring equipment, and sustaining operations over the duration of an incident. For example, in a large-scale natural disaster, agencies may need to prioritize certain operations over others based on urgency, potential impact, and available budget.

Source: https://training.fema.gov/emiweb/is/is200c/english/instructor%20guide/is0200c%20ig.pdf