Panel Upgrade Cost Calculator — Built From Parts

US market data for 2026 puts residential panel and service upgrades at roughly $1,300 to $5,000 installed, with most 100 A to 200 A jobs landing near $3,000. The spread is driven by whether the meter socket and service conductors change, overhead mast versus underground lateral, how far the panel is from the meter, permit fees, and how much circuit re-termination the old panel needs.

No, and conflating them costs customers money. A panel replacement swaps the panelboard while keeping the same service rating — no utility involvement, no new service-entrance conductors, no meter work. A service upgrade raises the rating, which means new service conductors, usually a new meter socket, utility coordination and a disconnect, and often mast or lateral work. The second job can cost three or four times the first.

Often not. Run the load calculation before pricing anything: many homes told they need an upgrade have plenty of capacity. A 48 A EV charger adds only about 4,600 VA to a NEC 220.82 calculated load thanks to the 40% remainder factor. Check with the Residential Load Calculator and the Service Size Calculator first — and remember NEC 220.87 lets you use twelve months of measured demand instead of an estimate.

Because the wire time is the small part. A service upgrade includes pulling the permit, coordinating the utility disconnect and reconnect, waiting for the inspector, re-terminating every existing circuit onto the new bus, replacing the grounding electrode conductor and bonding, and often correcting pre-existing violations the inspector now sees. Shops that quote six hours of visible work on a job that takes ten lose most of the profit.

Three things. Meter and service conductor work — if the utility point of attachment, the meter socket, and the conductors all change, you have effectively two jobs. Panel location — a long run from meter to panel multiplies the conductor cost, and 4/0 aluminum or 2/0 copper is not cheap per foot. Pre-existing conditions — knob-and-tube, aluminum branch circuits, missing grounds, or a failed grounding electrode all become your problem at inspection.

Rarely worth it on a single dwelling. A 400 A service roughly doubles the panel and conductor cost, usually needs two 200 A panels or a 400 A meter-main, and frequently triggers utility transformer work. Most all-electric homes — heat pump, EV charging, induction, heat pump water heater — still calculate under 200 A once NEC 220.82 demand factors are applied. Verify with a load calculation before quoting 400 A.