The cost to upgrade your home’s electrical panel varies widely depending on the scope of the work, but you should expect to pay (very roughly) $2,000 – $2,500. That’s for 100-amp service; the price will be higher if you need to rewire your home for 200+ amps. The only way to be sure about the cost is to have an electrician (or better yet: 3 different electricians) give you detailed quotes.