Your breaker box trips every time the microwave and hair dryer run at once, or your electrician says your 100-amp service can't handle a heat pump or EV charger. Either way, you're looking at a panel upgrade — and the quotes you get back can look wildly different from each other. Here's what actually drives the price.
How Much Does a 100-to-200-Amp Panel Upgrade Cost?
According to HomeGuide's electrical panel cost data, most homeowners pay $1,300 to $2,500 to upgrade from 100 amps to 200 amps. Angi puts the general range slightly lower, around $1,200 to $2,000, though its city-level data shows real jobs running higher — Chicago homeowners typically pay $1,350 to $2,075, and New York City homeowners pay $1,465 to $2,250.
| Panel Size | Typical Cost Range |
|---|---|
| 100 Amp (replacement, same size) | $850 – $1,600 |
| 200 Amp (upgrade from 100 Amp) | $1,300 – $2,500 |
| 400 Amp (large home or shop) | $2,000 – $4,000+ |
Ranges reflect published national cost-guide data and will differ by market. Your local quotes are the only real answer for your house.
Labor alone typically runs $400 to $800, based on 8 to 10 hours of work at $40 to $100 an hour, though Angi notes electricians in some markets charge up to $250 an hour for specialized panel work. If you want a sense of typical hourly rates in your area first, see how much an electrician costs per hour.
What Drives the Price Up?
A straightforward panel swap — same location, same service size, easy access — sits at the low end of the range. Costs climb when:
- The service entrance needs work. If the wire running from the utility connection to your house isn't rated for the new amperage, that has to be replaced too.
- The meter base is outdated. Some upgrades require a new meter socket, which means coordinating with the utility company.
- The panel has to move. Relocating a panel — say, from a basement to an exterior wall — adds framing, wiring runs, and labor hours.
- Your home has aluminum wiring or knob-and-tube wiring. Older wiring types can require additional remediation before a new panel passes inspection.
- Local labor rates. Electrician pay varies significantly by metro area, which is a big reason two houses with identical panels can get very different bids.
Do You Need a Permit for a Panel Upgrade?
Yes. A panel upgrade changes your home's electrical service, and virtually every jurisdiction requires a permit and inspection for that. Permit fees typically run $50 to $300, though they vary by city — Angi cites Chicago's building department charging around $600, while Denver's permits generally fall between $100 and $500. Most licensed electricians pull the permit for you and fold the fee into their quote, but it's worth confirming that upfront rather than finding a surprise line item later. A permitted, inspected upgrade also matters when you sell the house — buyers' inspectors and insurers both look for it.
Why Do Bids for the Same Job Vary So Much?
This is the part that frustrates homeowners most. You call three electricians, describe the same panel and the same house, and get back numbers that don't even look like they're for the same job. A few real reasons for that:
- Different assumptions about scope. One electrician may assume the service entrance wire is fine; another may build in a contingency for replacing it.
- Different crew sizes and timelines. A two-person crew finishing in a day costs less than a solo electrician stretching the same job over two.
- Permit handling. Some quotes include the permit and inspection coordination; others list it as a separate cost.
- Overhead and demand. Established companies with more overhead — trucks, warranties, office staff — typically bid higher than a smaller outfit, and electricians in high-demand seasons pad in a premium.
None of that means the higher bid is a ripoff or the lower one is a corner-cutter. It means the only way to know if a number is fair is to see it next to two or three others for the identical scope of work. That's the core of the FTC's guidance on hiring a contractor: get it in writing, get more than one bid, and compare apples to apples.
Is a Bigger Panel (300 or 400 Amp) Worth It?
Most single-family homes are well served by 200 amps, which covers central air, an electric range, and modern appliances with room for an EV charger or two. Larger panels — 300 or 400 amp — usually make sense for bigger homes, homes with a workshop or detached ADU, or households electrifying multiple systems (heat pump, EV charger, induction range, pool equipment) at once. Going bigger than you need adds cost without adding value, so this is a conversation to have with a licensed electrician who can calculate your home's actual electrical load rather than guessing.
What to Do About It
Before you commit to a number, get the scope in writing: panel size, whether service entrance wiring is included, who's pulling the permit, and the timeline. Ask each electrician to walk your specific panel and meter, not just quote over the phone — remote estimates are where the biggest bid swings come from. Then get at least two more quotes for the exact same scope. A price only tells you it's fair when you can see it next to comparable bids for your house, not a national average.