How much does a 100A to 200A panel upgrade cost?

Typical 100A to 200A residential service upgrade runs $1,800 to $3,500 in most US markets, including the new panel, main breaker, service entrance conductors, meter base, ground rods, permit, and utility reconnect. Underground service or a panel relocation pushes it toward $4,500. The panel hardware itself is only $200-$400 — labor and utility coordination drive the rest.

When do I actually need a panel upgrade?

You need one if you have a Federal Pacific Stab-Lok, Zinsco, or Pushmatic panel, if your service is 60A or 100A and you are adding a Level 2 EV charger or whole-home heat pump, if breakers trip under normal load, or if you are finishing a basement / adding an ADU. A NEC 220.82 or 220.83 load calc is the document that proves the answer.

How long does a panel upgrade take?

The physical swap is a 4 to 8 hour day with the power off across the whole house. The total project from permit pull to final inspection runs one to three weeks, depending on city turnaround and utility scheduling. Plan to be out of the house or at least without a fridge for the work day.

What is wrong with Federal Pacific, Zinsco, and Pushmatic panels?

Federal Pacific Stab-Lok breakers fail to trip on overload at much higher rates than UL specifies — independent testing in the 1980s documented this, and a 2002 New Jersey class action settled finding the company misrepresented UL listing. Zinsco breakers weld shut and bus bars melt. Pushmatic parts are obsolete. House fires have been traced to all three.

Can I do a panel upgrade myself?

No. The utility will not pull the meter for an unlicensed homeowner in almost every US jurisdiction, and unpermitted service work will void homeowner insurance for any related fire claim. This is the one electrical project where DIY does not make sense even for skilled homeowners. Hire a licensed electrician who pulls the permit in their own name.

Is 200A enough or do I need 400A service?

For almost every fully-electrified single-family home, 200A is plenty — full electric range, dryer, water heater, AC, EV charger, and heat pump all fit on a 200A panel. 400A doubles install cost and is rarely justified outside of multiple EVs plus a large workshop, ADU, or pool equipment. Insist on a written load calc before sizing up.

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Electrical Panel Upgrade in 2026: Cost, Timeline, and How to Decide

By Brian WilliamsPublished April 27, 202610 min read

A 100A to 200A panel upgrade runs $1,800 to $3,500 typical, takes 4 to 8 hours of power-off, and requires a permit and utility coordination. Here is when you actually need one, what it costs, and how to hire it out.

If you have ever stood in front of your electrical panel, flipped a breaker for the third time this month, and wondered if it is finally time to upgrade, this is the post I wish somebody had handed me when I started looking into it. I am a firefighter, I run PermitDeck, and I have walked a couple of friends through panel upgrades on their own homes. The work itself is not mysterious. The pricing, the permit, the utility coordination, and the question of whether you even need an upgrade in the first place: that is where people get tripped up.

Here is the straight version.

Quick answer

Cost (100A to 200A swap): $1,800 to $3,500 in most of the country, including permit and inspection.

Cost (200A to 400A or 320/400 service): $4,500 to $8,000, sometimes more if the utility has to upsize the drop.

Time: 4 to 8 hours of power-off for a like-for-like 200A swap. The whole project, from permit to final inspection, usually takes 1 to 3 weeks.

Who does it: A licensed electrician. This is not a DIY job, full stop. The utility has to disconnect the meter, and most utilities will only do that for a licensed contractor.

When you need one: You are adding an EV charger, a heat pump, an ADU, or a kitchen remodel. Or you have a Federal Pacific, Zinsco, or Pushmatic panel. Or your breakers trip under normal load.

If none of that is you, you probably do not need an upgrade. Plenty of homes run fine on 100A forever.

What "panel upgrade" actually means

People throw the phrase around to mean three different jobs:

1. Service upgrade. This is the big one. You are increasing the amperage of the service coming into the house, usually 100A to 200A. The utility has to pull the meter, and you typically replace the service entrance cable, meter base, main breaker, and panel as one job.

2. Panel replacement (same amperage). Your service stays at 100A or 200A, but the panel itself gets swapped. This is what you do if you have an old fuse box or a recalled panel brand and the existing service is fine.

3. Subpanel addition. You leave the main panel alone and run a feeder to a new smaller panel somewhere else in the house, usually a garage or addition. This adds circuit capacity without changing the service.

These are not the same job and they do not cost the same. When you call electricians for quotes, be specific about what you are asking for, because "I want to upgrade my panel" can mean any of the three.

Cost breakdown

JobTypical costWhat is included 100A to 200A service upgrade$1,800 to $3,500New panel, main breaker, service entrance conductors, meter base, ground rods, permit, inspection, utility reconnect 200A to 400A (or 320A continuous)$4,500 to $8,000All of the above plus larger meter base, possible utility-side upgrade, sometimes a CT cabinet Same-amp panel replacement$1,500 to $2,800New panel and breakers, no service entrance work Subpanel add (60A to 100A)$500 to $1,500 plus feeder wireSubpanel, breakers, feeder run from main, permit Service mast replacement$300 to $900 addedNew mast, weatherhead, conduit if the old one is corroded Drywall repair after panel swap$150 to $600If the panel relocates or the new one has a different footprint Permit$75 to $200Varies by jurisdiction. See state-by-state electrical permits

A few things that surprise people. The panel itself is the cheapest part of the job, usually $200 to $400 for a quality 200A loadcenter. You are paying for the electrician's time, the utility coordination, and the risk of working hot at the meter base. That is why a "just swap the panel" quote and a "full service upgrade" quote can differ by $1,500 even though it looks like the same work.

For a quick ballpark on your own job, our electrical cost calculator will get you in the right zip code.

When you actually need an upgrade

Here is the honest test. You need a service upgrade if any of these apply:

You are adding a Level 2 EV charger. A 48A charger pulls 60A continuous on its breaker. On a 100A panel that already runs an electric range, electric dryer, and central AC, you are over the line on the load calc. I wrote a full walkthrough on this in the home EV charger post, including how to know if you can squeeze the charger in without an upgrade.

You are installing a heat pump. A whole-home cold-climate heat pump with electric backup can pull 60A to 80A on its own. If you are coming from gas heat, the existing panel was never sized for it.

You have a Federal Pacific Stab-Lok panel. These were installed from the late 1950s through the early 1980s. Independent testing in the 1980s found the breakers failed to trip on overload at much higher rates than UL specs allowed. There has never been a formal CPSC recall, but a New Jersey class action settled in 2002 finding the company misrepresented UL listing. If you have one, you do not "monitor" it. You replace it. House fires have been traced to these panels.

You have a Zinsco or Sylvania-Zinsco panel. Zinsco was bought by GTE-Sylvania around 1973 and the panel line was discontinued shortly after. Same problem as Federal Pacific: breakers welding shut, melted bus bars, fires. Replace it.

You have a Pushmatic panel. Bulldog Pushmatic breakers are not as catastrophically dangerous as FPE or Zinsco, but parts are obsolete and the breakers age poorly. If you are doing any other electrical work, swap it.

You have aluminum branch wiring. This is the small-gauge aluminum wire (12 and 10 AWG) installed in homes built roughly 1965 to 1973. CPSC found these connections were 55 times more likely to reach fire-hazard conditions at outlets than copper. Note: aluminum *service entrance* cable, the big stuff feeding the meter, is fine and is still standard today. The dangerous one is aluminum branch circuits inside the walls. A panel upgrade does not fix aluminum branch wiring on its own, but it is usually done at the same time as a rewire.

Breakers trip under normal load. Not a one-off. If your microwave plus toaster trips a 20A circuit, that is normal. If your central AC trips its own dedicated breaker every August afternoon, your service is undersized or the breaker is failing.

You are adding an ADU or finishing a basement. New living space means new circuits, often a new range, sometimes a mini-split. Run the load calc before you frame.

You still have a fuse box. Fuses are not inherently unsafe, but you are running a service that is almost certainly 60A or 100A, and you are one wrong fuse swap away from a problem. Insurance carriers also do not love them.

NEC 220.82 and 220.83: the load calc

This is the part most homeowners skip and most good electricians will not.

NEC 220.82 is the Optional Method for Dwelling Unit load calculation. It is a simplified formula the code lets you use for a single-family home. You add up your general lighting and small-appliance loads, then add the nameplate ratings of your fixed appliances (range, dryer, water heater, AC, EV charger), apply the demand factors the code allows, and the result is your calculated load in watts. Divide by your service voltage (240V) and you get amps.

NEC 220.83 is the same idea but for existing dwellings adding new loads, like an EV charger or a heat pump on top of what is already there. It lets you use historical demand instead of nameplate, which is usually more favorable to the homeowner.

Why it matters: an electrician who skips the load calc and just sells you a 200A upgrade because "200 is the standard now" might be selling you something you do not need. Or worse, the other direction: somebody tells you "you'll be fine on 100A" and they did not actually do the math. The load calc is the document. Ask to see it.

What the 4 to 8 hour day looks like

The day of the swap, here is the sequence:

1. Utility cuts power at the meter. Either they pull the meter physically, or they cut the drop at the weatherhead. Power is now off in the entire house.

2. Electrician disconnects the old service. Service entrance conductors come out of the meter base and the panel.

3. Old panel comes off the wall. Every branch circuit gets labeled, disconnected, and the panel is removed.

4. New panel goes in. New main breaker, new bus bars, new neutral and ground bars.

5. Branch circuits get reconnected. Each circuit goes onto its new breaker. This is where labeling matters.

6. New service entrance conductors and meter base. If those are part of the job.

7. Grounding. Two ground rods 6 feet apart, plus a ground to the cold water main if it is metal entering the house. NEC 250.50 and 250.52 spell out what counts.

8. Inspection. A municipal or third-party inspector signs off before the utility will reconnect. Some jurisdictions allow same-day inspection, some do not. This is the variable that can stretch a one-day job into a multi-day job if the inspector cannot come until tomorrow.

9. Utility reconnects the meter. Power is back on.

You and your family should plan to be out of the house, or at least not need the fridge, for the full day. I tell friends to empty perishables into a cooler the night before and plan on dinner out.

Permits and utility coordination

Two things you need, and the electrician handles both for you on a properly run job.

Service-change permit. Pulled in the electrician's name, not yours. This is important. If you pull it in your name as a homeowner, you become the responsible party for code compliance, and most jurisdictions will not let a homeowner pull an electrical service permit anyway. Permit fees run $75 to $200 depending on the city. State-by-state rules are summarized at /electrician-permits.

Utility coordination. Your power company needs to schedule the disconnect and reconnect. The electrician calls them and coordinates the date. Some utilities want 48 hours notice, some want a week. The electrician should have a relationship with the local utility and know the rhythm.

The inspection sequence on a panel swap is usually just a final inspection. There is no rough-in stage the way there is for new construction, because the house is already wired. The inspector shows up, opens the panel, checks the work, signs the permit. Utility reconnects after the green tag.

What makes a panel upgrade $2,000 vs $5,000

If you get three quotes and they vary by $3,000, here is what is driving it:

Service mast condition. If the mast is corroded, leaning, or the wrong height for current code (often 10 feet over a walkway, more over a driveway), it has to be replaced. That is $300 to $900.

Underground vs overhead service. Overhead is straightforward. Underground means dealing with the utility's lateral, sometimes a new conduit run from the transformer. Underground service upgrades can cost twice as much.

Panel relocation. If you are moving the panel from a closet to a garage, or from inside to outside, you are paying for new conductors, drywall repair, and possibly a longer service entrance run.

Number of circuits. A panel with 30 active circuits takes longer to relabel and reconnect than one with 12. More handle relocation, more time.

Grounding upgrade. Older homes often need new ground rods to meet current NEC 250.50 and 250.52. Two rods, driven 8 feet, 6 feet apart, bonded back to the panel. Usually included, but worth confirming.

Panel brand. Square D QO, Eaton CH, and Siemens are the three brands I would put in my own house. They are not the cheapest. A no-name panel saves $100 and you live with breakers that may or may not be available in 15 years. Spend the money.

Whether the utility has to upsize the drop. If you are going to 400A and the existing transformer cannot support it, the utility may charge you for a transformer upgrade. This is rare on residential but it happens.

How to hire it out

A few things I tell every friend who calls me:

1. Get 2 to 3 quotes. Not 5. More than 3 just wastes everybody's time, and the spread tells you everything.

2. Verify the license. Most states have a free online license lookup. We have a verified directory at /electricians for the states we cover.

3. Permit goes in their name. If they say "we can save you the permit fee by skipping it," walk away. That is a contractor who will not be there when you sell the house and the inspection comes up.

4. Ask what brand panel. Square D QO, Eaton CH, Siemens. Those are the answers you want.

5. Ask about meter relocation. If the meter is in a weird spot, this might be the right time to move it. Add it to the quote up front, do not bolt it on later.

6. Ask if they do their own utility coordination. Some smaller shops outsource it or push it onto the homeowner. You want them to handle it.

7. Get the load calc in writing. This is the document that justifies the upgrade size. If they cannot produce one, they did not do one.

Common mistakes

Going to 400A when 200A is plenty. Unless you have a real load calc that says you need 400A (whole-home electrification, multiple EVs, large workshop), 200A handles a fully electrified normal house just fine. 400A doubles your cost and almost never returns the value.

Skipping the permit because "it is just inside the panel." It is not just inside the panel. The service entrance conductors are part of the job, and unpermitted electrical work shows up on inspections when you sell.

Adding a subpanel when the service is the bottleneck. A subpanel adds circuit space, not capacity. If your 100A service is maxed out, adding a 60A subpanel does nothing for you. The total still has to fit through the main breaker.

Doing the work without coordinating with the utility. I have seen DIY panel swaps where somebody pulled their own meter. Most utilities consider that theft of service and you can lose your account.

Not labeling circuits before the swap. This sounds obvious but it gets skipped. You do not want the electrician guessing which breaker is the kid's bedroom at 4pm on a Friday.

Bottom line: three things to do this week

1. Open your panel and look at the brand and amperage. The main breaker tells you the amperage (usually a 100 or 200 stamped on the handle). The brand is on the deadfront cover. If you see Federal Pacific Stab-Lok, Zinsco, or Pushmatic, that is your answer: time to upgrade.

2. List your future loads. EV in the next two years? Heat pump? Range upgrade from gas to electric? Pool? Write them all down. That list is what your electrician needs to run the load calc.

3. Get two quotes from licensed electricians. Not three, not five. Two, from contractors who pull permits in their own name. If you do not have anyone in mind, start at /electricians.

A panel upgrade is one of those projects where the work itself is straightforward, the cost is more predictable than people expect, and the safety upside (especially if you have one of the bad-brand panels) is real. Do not let it sit on the to-do list for another five years. If it needs to happen, the cheapest version is the one you do this year.

Stay safe out there.

tips

Electrical Panel Upgrade in 2026: Cost, Timeline, and How to Decide

By Brian WilliamsPublished April 27, 202610 min read

Here is the straight version.

Quick answer

Cost (100A to 200A swap): $1,800 to $3,500 in most of the country, including permit and inspection.

Cost (200A to 400A or 320/400 service): $4,500 to $8,000, sometimes more if the utility has to upsize the drop.

Time: 4 to 8 hours of power-off for a like-for-like 200A swap. The whole project, from permit to final inspection, usually takes 1 to 3 weeks.

Who does it: A licensed electrician. This is not a DIY job, full stop. The utility has to disconnect the meter, and most utilities will only do that for a licensed contractor.

When you need one: You are adding an EV charger, a heat pump, an ADU, or a kitchen remodel. Or you have a Federal Pacific, Zinsco, or Pushmatic panel. Or your breakers trip under normal load.

If none of that is you, you probably do not need an upgrade. Plenty of homes run fine on 100A forever.

What "panel upgrade" actually means

People throw the phrase around to mean three different jobs:

Cost breakdown

For a quick ballpark on your own job, our electrical cost calculator will get you in the right zip code.

When you actually need an upgrade

Here is the honest test. You need a service upgrade if any of these apply:

You are adding an ADU or finishing a basement. New living space means new circuits, often a new range, sometimes a mini-split. Run the load calc before you frame.

NEC 220.82 and 220.83: the load calc

This is the part most homeowners skip and most good electricians will not.

What the 4 to 8 hour day looks like

The day of the swap, here is the sequence:

1. Utility cuts power at the meter. Either they pull the meter physically, or they cut the drop at the weatherhead. Power is now off in the entire house.

2. Electrician disconnects the old service. Service entrance conductors come out of the meter base and the panel.

3. Old panel comes off the wall. Every branch circuit gets labeled, disconnected, and the panel is removed.

4. New panel goes in. New main breaker, new bus bars, new neutral and ground bars.

5. Branch circuits get reconnected. Each circuit goes onto its new breaker. This is where labeling matters.

6. New service entrance conductors and meter base. If those are part of the job.

7. Grounding. Two ground rods 6 feet apart, plus a ground to the cold water main if it is metal entering the house. NEC 250.50 and 250.52 spell out what counts.

9. Utility reconnects the meter. Power is back on.

You and your family should plan to be out of the house, or at least not need the fridge, for the full day. I tell friends to empty perishables into a cooler the night before and plan on dinner out.

Permits and utility coordination

Two things you need, and the electrician handles both for you on a properly run job.

What makes a panel upgrade $2,000 vs $5,000

If you get three quotes and they vary by $3,000, here is what is driving it:

Service mast condition. If the mast is corroded, leaning, or the wrong height for current code (often 10 feet over a walkway, more over a driveway), it has to be replaced. That is $300 to $900.

Panel relocation. If you are moving the panel from a closet to a garage, or from inside to outside, you are paying for new conductors, drywall repair, and possibly a longer service entrance run.

Number of circuits. A panel with 30 active circuits takes longer to relabel and reconnect than one with 12. More handle relocation, more time.

How to hire it out

A few things I tell every friend who calls me:

1. Get 2 to 3 quotes. Not 5. More than 3 just wastes everybody's time, and the spread tells you everything.

2. Verify the license. Most states have a free online license lookup. We have a verified directory at /electricians for the states we cover.

4. Ask what brand panel. Square D QO, Eaton CH, Siemens. Those are the answers you want.

5. Ask about meter relocation. If the meter is in a weird spot, this might be the right time to move it. Add it to the quote up front, do not bolt it on later.

6. Ask if they do their own utility coordination. Some smaller shops outsource it or push it onto the homeowner. You want them to handle it.

7. Get the load calc in writing. This is the document that justifies the upgrade size. If they cannot produce one, they did not do one.

Common mistakes

Not labeling circuits before the swap. This sounds obvious but it gets skipped. You do not want the electrician guessing which breaker is the kid's bedroom at 4pm on a Friday.

Bottom line: three things to do this week

2. List your future loads. EV in the next two years? Heat pump? Range upgrade from gas to electric? Pool? Write them all down. That list is what your electrician needs to run the load calc.

3. Get two quotes from licensed electricians. Not three, not five. Two, from contractors who pull permits in their own name. If you do not have anyone in mind, start at /electricians.

Stay safe out there.

Electrical Panel Upgrade in 2026: Cost, Timeline, and How to Decide

Quick answer

What "panel upgrade" actually means

Cost breakdown

When you actually need an upgrade

NEC 220.82 and 220.83: the load calc

What the 4 to 8 hour day looks like

Permits and utility coordination

What makes a panel upgrade $2,000 vs $5,000

How to hire it out

Common mistakes

Bottom line: three things to do this week

Frequently asked questions

How much does a 100A to 200A panel upgrade cost?

When do I actually need a panel upgrade?

How long does a panel upgrade take?

What is wrong with Federal Pacific, Zinsco, and Pushmatic panels?

Can I do a panel upgrade myself?

Is 200A enough or do I need 400A service?

Keep reading

9 Signs You Need an Electrical Panel Upgrade in 2026

Whole-House Repipe in 2026: Cost, Timeline, and What to Expect

How to Install a Home EV Charger in 2026 (The Real How-To)

Get weekly cost & permit updates

Get a personalized estimate

Electrical Panel Upgrade in 2026: Cost, Timeline, and How to Decide

Quick answer

What "panel upgrade" actually means

Cost breakdown

When you actually need an upgrade

NEC 220.82 and 220.83: the load calc

What the 4 to 8 hour day looks like

Permits and utility coordination

What makes a panel upgrade $2,000 vs $5,000

How to hire it out

Common mistakes

Bottom line: three things to do this week

Frequently asked questions

How much does a 100A to 200A panel upgrade cost?

When do I actually need a panel upgrade?

How long does a panel upgrade take?

What is wrong with Federal Pacific, Zinsco, and Pushmatic panels?

Can I do a panel upgrade myself?

Is 200A enough or do I need 400A service?

Keep reading

9 Signs You Need an Electrical Panel Upgrade in 2026

Whole-House Repipe in 2026: Cost, Timeline, and What to Expect

How to Install a Home EV Charger in 2026 (The Real How-To)

Get weekly cost & permit updates

Get a personalized estimate