In most residential heavy-ups, the electrical contractor talks to the utility. The utility has to disconnect the service so the meter socket and service conductors can be changed safely, and it has to reconnect only after the work and, typically, an inspection are acceptable. Some utilities also require the customer of record to call, to be home, or to sign an authorization. Ask the electrician who files what, and confirm it with the utility’s service-upgrade desk rather than assuming a national rule.
This is a scope and timeline question as much as a phone-tree question. If the quote is silent on utility coordination, fees, and the outage appointment, it is not a complete 200-amp upgrade quote — see the included-in-the-upgrade page and the meter-base page. A 200-amp-rated panel on a meter the utility never upgraded is the mismatch this process exists to prevent.
Have the account number, the site address, and a description of the work ready if the utility does ask you to call. The calculator is not involved in the utility appointment; it only helps you talk about why the upgrade is being requested.
This is not a permit calculation, a utility approval, or a substitute for a licensed electrician, HVAC contractor, or the authority having jurisdiction. Panel Headroom is an independent educational site. It is not a utility, a certification body, or a contractor. Electrical and generator work that is done incorrectly can cause fire, shock, or carbon monoxide poisoning. Use the adopted electrical code and manufacturer instructions; pull permits where required.