How much does it cost to replace a Federal Pacific breaker?

You should not replace just a Federal Pacific breaker, as the entire Federal Pacific panel is considered unsafe and needs to be replaced, so the cost to replace a single breaker is not a recommended expense and aftermarket breakers are not considered safe. If you try to buy an aftermarket replacement breaker marketed as compatible with Federal Pacific Stab-Lok panels from companies like Connecticut Electric under brands like UBI, they typically cost 40 to 120 dollars per breaker on Amazon or electrical supply houses, which is much more expensive than a standard Square D or Eaton breaker that costs 10 to 30 dollars. However, electricians strongly advise against spending money on these replacement breakers because they do not fix the underlying bus bar damage and failure-to-trip problems of Federal Pacific panels, and many inspectors and insurance companies will still require full panel replacement even if you replace breakers. The proper cost to consider is full panel replacement, which typically costs 1,500 to 3,500 dollars for a 100 to 200 amp panel replacement by a licensed electrician, including new panel, breakers, permits, and labor. Some areas with higher labor costs may be 2,000 to 4,000 dollars. So rather than paying for a single unsafe breaker, you should budget for full panel replacement for safety.