Electrical Panel Upgrade Cost: 100A vs. 200A & Service Upgrades

An electrical panel upgrade budget depends on how much capacity you are moving to, how much of the electrical service you are touching, and the condition of your existing setup. Replacing just the panel (the breaker box) is a smaller scope than a full service upgrade, which can also involve the meter, service entrance conductors, mast, and grounding — and coordination with your utility.

Every price in our tools is an editable planning assumption, not a verified national average. Start from the defaults and replace them with a quote from a licensed electrician.

Two choices drive most of the cost — the target amperage and the scope of work:

200A is a common target for homes adding significant load, but the right amperage depends on your actual and planned electrical demand — a licensed electrician performs a load calculation to size it correctly.

Common reasons homeowners upgrade a panel or service include:

• Adding load: an EV charger, a heat pump, central air, a hot tub, or a workshop that the existing service cannot support.
• Old fuse boxes: replacing an outdated fuse panel with a modern breaker panel.
• Known-problem panels: certain older panel brands have been flagged by electricians as needing replacement.
• Insufficient capacity: frequently tripped breakers or no room for new circuits.
• Damage or safety concerns: corrosion, overheating signs, or code violations found during inspection.

A licensed electrician should confirm whether you need a panel swap, a capacity upgrade, or a full service upgrade before you budget.

Read this first. Electrical panel and service work involves the main service connection and carries serious risk of electrocution and fire. It is not a DIY task. In essentially all jurisdictions this work requires a permit, a licensed electrician, an inspection, and coordination with your utility (which may need to disconnect and reconnect power).

Electrical codes vary by jurisdiction, and the main service conductors can remain energized even when the main breaker is off. We do not provide step-by-step instructions for panel or service work. Hire a licensed electrician and confirm requirements with your local building department and utility.

A panel or service upgrade is a permitted, inspected job. Typical steps include pulling a permit, scheduling the licensed electrician, coordinating with the utility for a power disconnect/reconnect, and passing inspection before power is restored. Because the utility and inspector are involved, scheduling — not just labor — can affect the timeline and cost. Confirm the process locally before committing.

To frame your budget, determine: (1) your required amperage from a load calculation, (2) whether this is a panel-only swap or a full service upgrade, (3) the condition and location of the existing panel and meter, and (4) what your utility requires. Add the permit and inspection. Enter your own local figures if you have a quote; otherwise start from the editable defaults and adjust. Because this is licensed work with utility involvement, rely on a professional quote rather than a generic number.

• Assuming a panel swap when the full service (meter, mast, grounding) actually needs upgrading.
• Sizing amperage by guesswork instead of a licensed electrician's load calculation.
• Forgetting permit, inspection, and utility-coordination steps and their effect on timeline.
• Underestimating added-load drivers like an EV charger or heat pump.
• Treating a national "average" as your quote. Always confirm locally with a licensed pro.