What an electrical panel upgrade costs in Oklahoma City, and what pushes it up

Published 2026 cost guides put a standard 100 to 200 amp upgrade at about $1,800 to $3,500, and another national guide gives a band of $1,500 to $4,000 with a typical job near $2,500. A 400 amp service, for large homes with several major loads, sits at about $3,000 to $8,000. These are planning figures from national sources, not quotes, and they include the panel, breakers, labor and permit in most cases.

Two things are worth knowing before you compare numbers. First, the panel is rarely the only part replaced; once the service is opened, the inspector expects grounding, bonding and sometimes the meter base to meet current requirements. Second, the low end of any range assumes a straightforward house. Older homes with surprises behind the panel land higher.

Not every full panel needs more amps. If the problem is space, not capacity, a subpanel near the new circuits can be the cheaper answer; a 2026 guide lists subpanels at about $2,800 to $5,100 installed, which can be less than an upgrade plus long circuit runs. If one big new load is the trigger, such as an EV charger, a load management device can sometimes avoid an upgrade entirely.

The only way to know is a load calculation: what the house draws with everything it runs now, plus what you plan to add. We do that before recommending anything, because an upgrade you do not need is money that could have gone to the charger or the kitchen itself.

A good quote lists the panel size and brand, whether the meter base and mast are included, what grounding and bonding work is planned, the permit, and what happens if damage is found behind the old panel. If a quote is much lower than the published ranges, check what it leaves out. If it is much higher, ask what makes this house different.

Ask whether the price includes labeling every circuit in the new panel. It sounds minor until the next time a breaker trips and nobody knows which room it feeds.

The right size depends on where the house is headed, not only on what it runs today. An EV charger, a heat pump, a hot tub, a shop subpanel or a standby generator each changes the load calculation. A 200 amp service covers most Oklahoma City homes comfortably, including one EV charger, when the loads are planned.

Larger homes with electric heat, several chargers or a pool sometimes need more. National 2026 figures put a 400 amp service at about $3,000 to $8,000. A load calculation tells you which side of that line your house falls on before you pay for capacity you will not use.

A full panel with tandem breakers everywhere, a 100 amp service carrying central air and electric appliances, breakers that run warm, lights that dim when the AC starts, or a new EV charger or heat pump on the way. Any one of those is a reason for a load calculation. Two or more usually means the upgrade is coming, and planning it beats doing it after a failure.