Price range for a 30 amp circuit breaker

A standard 30 amp single-pole circuit breaker costs between $15 and $50 at most home improvement stores, depending on the brand and where you buy it. A 30 amp two-pole breaker (which takes up two slots in your panel) runs $25 to $75. The price difference usually comes down to the manufacturer — name brands like Square D, Eaton, and Siemens cost more than store brands, but all breakers sold in the United States must meet the same safety code.

If you need a breaker for a specific panel brand, check the label inside your electrical panel door before you shop. A breaker made for a Siemens panel will not fit a Square D panel, even if the amperage is the same. Buying the wrong type wastes money and creates a safety hazard.

Key Takeaways

  • A single-pole 30 amp breaker typically costs $15 to $50, and a two-pole costs $25 to $75, depending on the brand and retailer.
  • The breaker must match your panel brand — a Square D breaker will not fit a Siemens panel, so check your panel label before buying.
  • Home improvement stores, electrical supply shops, and online retailers all stock 30 amp breakers, though electrical supply shops often have the widest selection.
  • Installation by a licensed electrician usually costs $150 to $300 on top of the breaker price and requires a permit and inspection in most areas.

Where to buy a 30 amp circuit breaker

Home Depot and Lowe's stock 30 amp breakers in their electrical sections, usually in stock for same-day pickup. Prices at these stores are competitive, and you can compare brands side by side. If you know your panel brand, you can search online before you go to confirm they have the right type in stock.

Electrical supply shops — the kind that cater to contractors — often have more brands and panel types on hand than big-box stores. They may also be able to order a less common breaker type within a day or two. Prices at supply shops are sometimes lower than home improvement stores, especially if you buy multiple items. Online retailers like Amazon and eBay sell 30 amp breakers, but shipping times vary, and you need to be certain of your panel brand before ordering.

Single-pole versus two-pole breakers and cost

A single-pole breaker controls one circuit and takes up one slot in your panel. It is used for 120-volt circuits like kitchen outlets, bedroom lights, or bathroom fans. A single-pole 30 amp breaker costs less because it is simpler and smaller.

A two-pole breaker controls two circuits at once and takes up two slots in your panel. It is used for 240-volt circuits like electric dryers, ranges, air conditioners, or hot water heaters. Two-pole breakers cost more — usually $10 to $30 more than a single-pole — because they are larger and more complex. If your panel is already full, a two-pole breaker may not fit without removing another breaker first, which adds to the total cost of the job.

Labor costs for installation

If you hire a licensed electrician to install the breaker, expect to pay $150 to $300 for labor alone, on top of the breaker itself. The exact cost depends on your location, the electrician's experience, and how straightforward it is to access your panel. Some electricians charge a flat rate for a breaker swap; others charge hourly. Call three or four electricians in your area and ask for a quote before you decide.

Installation requires a permit from your local building department in most areas, and the work must pass a final inspection. The permit fee is usually $25 to $75. Your electrician will typically handle the permit and inspection as part of the job, but confirm this before you hire them. Doing the work without a permit is illegal and can void your homeowner's insurance if there is a fire or electrical problem later.

Brand differences and why they matter

The main brands sold in the United States are Square D, Eaton, Siemens, GE, and Cutler-Hammer. All of them meet the National Electrical Code (NEC) safety standards, so a breaker from any brand will work just as safely as another — as long as it fits your panel. The price difference between brands is usually small, $5 to $15 per breaker.

Some electricians prefer one brand over another based on past experience, but this is a matter of habit, not safety. What matters far more is that the breaker matches your panel exactly. If you are unsure which brand your panel is, open the panel door and look at the label. It will say "Square D," "Siemens," "Eaton," or another name. Write this down and bring it with you when you shop.

What affects the total cost of a breaker replacement

The breaker itself is only part of the expense. If your panel is old or has corrosion, the electrician may need extra time to remove the old breaker safely, which raises labor costs. If your panel is in a hard-to-reach location — like a basement corner or an attic — installation takes longer and costs more.

Some older panels have breakers that are no longer made. If your breaker is obsolete, the electrician may recommend replacing the entire panel, which costs $1,500 to $3,000. Before you panic, ask the electrician whether a replacement breaker is still available for your panel. Many older panels can still be serviced with modern breakers that fit the same slots.

DIY installation versus hiring an electrician

Replacing a circuit breaker yourself is possible if you have electrical experience, but it is dangerous work. The main panel carries live electricity even when the main breaker is off, and touching the wrong part can cause serious injury or death. Most building codes require that breaker installation be done by a licensed electrician, and many homeowner's insurance policies will not cover damage from unlicensed electrical work.

If you are comfortable with basic electrical tasks like replacing an outlet or light fixture, a breaker swap is still a step beyond that. The risk is not worth the $150 to $300 you might save. Hire a licensed electrician, get a permit, and have the work inspected. This protects your home, your family, and your insurance coverage.

Frequently Asked Questions

Can I use a 30 amp breaker from one brand in a panel made by a different brand?

No. Breakers are designed to fit only their own panel brand. A Square D breaker will not fit a Siemens panel, even if the amperage is the same. Using the wrong breaker is a fire hazard and violates electrical code. Always match the breaker to your panel brand.

Is a 30 amp breaker the same as a 30 amp outlet?

No. A 30 amp breaker is a safety switch inside your electrical panel. A 30 amp outlet is a receptacle on a wall or appliance where you plug in a cord. They work together — the breaker protects the circuit, and the outlet lets you use it — but they are separate parts.

Why do some 30 amp breakers cost twice as much as others?

Brand reputation, availability, and where you buy it all affect price. A Square D breaker may cost more than a store brand, but both meet the same safety code. Online retailers sometimes undercut local stores, but you pay for shipping. Electrical supply shops may offer bulk discounts if you buy several breakers at once.

Do I need a permit to replace a circuit breaker?

Yes, in most areas. A permit ensures the work is done safely and inspected by a may have access to person. Your electrician will usually handle the permit as part of the job. Skipping the permit is illegal and can cause problems with your insurance if there is an electrical fire.

What if my panel is too full to fit a new breaker?

If all the slots are taken, you have two options: remove an old breaker that is no longer needed, or replace the entire panel. Removing an old breaker is cheaper and faster. Panel replacement costs much more but gives you room to add circuits in the future.