Upgrading from 100 to 200 amps costs about $1,300 to $3,000 for most homes, including the panel, breakers, labor, and permit. If you also need a new meter base or service entrance cable, the total can reach $3,500 to $5,000. Older Federal Pacific, Stab-Lok, or Zinsco panels aren't optional upgrades — they're a documented fire hazard, and many insurers now refuse to cover homes that still have them.