Western NC Pays More for Power Than Eastern NC. The State's Highest Court Just Said That's Legal.

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By Jon Tharp, Broker  ·  May 24, 2026

Residents across the Mountain West have been opening their Duke Energy bills for two years wondering why the numbers keep climbing. The NC Supreme Court recently gave them an answer, and it was not the one consumer advocates were hoping for. The court upheld a set of rate increases approved by the NC Utilities Commission, affirming that Duke Energy can charge western North Carolina customers at rates different from, and often higher than, those paid by customers in the eastern part of the state. For anyone living in Macon, Jackson, Haywood, Swain, or any of the other mountain counties that make up Duke Energy's western territory, that ruling has real consequences for what they pay every month.

Two Companies, One Name, One Bill

The first thing to understand about Duke Energy rates in North Carolina is that the company you deal with depends entirely on where you live. Western North Carolina, including Franklin, Sylva, Waynesville, Brevard, Highlands, and the surrounding counties, is served by Duke Energy Carolinas. Duke Energy Progress serves eastern and central North Carolina. Both are subsidiaries of Duke Energy Corporation, headquartered in Charlotte, but they operate as distinct legal entities with separate balance sheets, separate infrastructure, and separate regulatory filings.

That distinction matters because rates are not set by Duke Energy Corporation as a whole. Each subsidiary files its own rate case with the NC Utilities Commission, presenting its own cost structure, its own capital investment plans, and its own justification for the rates it wants to charge. The NCUC reviews each filing independently, hears testimony from the utility, from consumer advocates, and from other intervening parties, and then issues an order approving, modifying, or rejecting the proposed rates.

The result is that customers in Waynesville and customers in Raleigh, both writing checks to a company with "Duke Energy" on the letterhead, can end up paying meaningfully different amounts for electricity. That has been true for years. The 2023 rate cases made it more pronounced.

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What the Rate Cases Actually Approved

The rate increase proceedings that reached the NC Supreme Court originated in filings Duke Energy Carolinas and Duke Energy Progress submitted to the NCUC in the 2021 to 2022 timeframe. Both subsidiaries were requesting increases, pointing to rising fuel costs, aging infrastructure, and the capital requirements associated with North Carolina's energy transition legislation. The NCUC conducted full proceedings for each subsidiary, including hearings, expert testimony, and review by the NC Public Staff, the state agency that serves as the consumer advocate in utility rate cases.

The commission approved increases for both subsidiaries. The specific approved percentages for each are a matter of public record in the NCUC's rate case orders, and residents who want to see the exact numbers can find them through the commission's public docket. What the proceedings made clear, and what subsequent court review confirmed, is that the two subsidiaries are not required to charge identical rates. Their cost structures differ. Their capital investment timelines differ. And the NCUC found that the approved rates for each were reasonable under the evidence presented.

The gap between what DEC customers pay in western NC and what DEP customers pay in the east is not a billing error or an oversight. It is the structural result of having two separate utilities operating under the same brand in different parts of a large state. The NC Supreme Court's ruling confirmed that this structure, and the rate differences that flow from it, complies with North Carolina law.

The Court Case and Who Challenged It

Rate case decisions by the NCUC can be appealed, and in cases involving large utilities, they often are. Intervening parties, which can include large industrial customers, municipal utilities, consumer advocacy organizations, and the NC Public Staff itself, have standing to challenge portions of the commission's orders they believe are unreasonable or legally flawed.

The appeals in the Duke Energy rate cases moved through the court system over a period of years, eventually reaching the NC Supreme Court. By the time the case arrived at the state's highest court, the specific legal questions centered on whether the NCUC had acted within its statutory authority in approving the rate structures, whether the evidentiary record supported the commission's findings, and whether the geographic pricing differential was legally defensible.

The court upheld the NCUC's decisions. The majority found that the commission had acted within its authority and that the record supported the approved rates. The ruling effectively ended the appellate process for this particular round of rate cases, meaning the approved rates are now final and no further court challenge is available on those specific proceedings.

By the time the 2022 elections reshaped the NC Supreme Court's composition, the court had shifted to a Republican majority. How that shift may have influenced the reasoning or outcome of utility-related appeals is a question observers of NC regulatory law have been watching. The final opinion and any dissents are public record and worth reading for anyone interested in the legal reasoning behind the decision.

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The Energy Transition Factor

Rate increases at Duke Energy do not happen in a vacuum. They are happening against the backdrop of one of the most significant shifts in the state's energy policy in decades.

NC House Bill 951, signed into law in 2021, set carbon reduction targets for Duke Energy and directed the utility to develop a plan for transitioning away from coal-fired generation. That transition requires enormous capital investment in new transmission infrastructure, grid modernization, and new generation capacity. The legislation authorized Duke Energy to recover those costs through customer rates, which means the people paying the bills are also funding the buildout of a cleaner energy system.

For western NC residents, that context does not make the higher bills easier to absorb, but it does explain some of what is happening. The rate increases approved in the 2023 proceedings are not simply the result of inflation or profit-seeking. They reflect the cost of retiring old coal plants, building new transmission lines through mountain terrain, and investing in a grid that is expected to carry significantly more load as electric vehicles and electric heat pumps replace fossil fuel alternatives over the next two decades.

The mountain terrain that makes western NC so attractive to residents and visitors alike also makes infrastructure investment more expensive here than in the flatter eastern part of the state. Running transmission lines through ridge and valley country costs more than running them across the coastal plain. That is part of the cost structure that Duke Energy Carolinas carries and that, under the current rate structure, WNC customers help pay for.

What This Means for WNC Households

The practical effect of the Supreme Court ruling is that the approved rate levels are now locked in as the baseline for Duke Energy Carolinas customers in western NC. Future rate cases will start from those numbers and propose adjustments from there. The ruling does not prevent Duke Energy from filing future rate cases, and it does not prevent future challenges to future rate decisions. What it does is close the door on any further litigation over the specific increases that were the subject of this round of cases.

For a typical residential customer in Franklin or Murphy or Andrews, the monthly impact depends on usage and the specific rate class they fall into. Customers on fixed incomes who use electric heat during mountain winters tend to feel rate increases more acutely than customers who heat with other fuels or who have smaller homes. Duke Energy does offer assistance programs for qualifying low-income customers, and the federal Low Income Home Energy Assistance Program provides additional support for households that meet income thresholds.

For business owners, the calculus is different. Commercial and industrial customers in western NC often pay rates that reflect their usage patterns and their ability to shift load during peak periods. Rate increases that get passed through to operating costs can affect everything from restaurant margins to the cost of running a small manufacturing operation. The tourism and hospitality economy that anchors towns like Highlands and Brevard is not immune to utility cost pressures.

The Limits of Consumer Recourse

One of the harder realities of utility regulation is that individual customers have limited ability to contest approved rates. The NCUC process is the primary venue for challenging rate proposals, and by the time a rate case decision reaches the point of Supreme Court review, the opportunity to shape the outcome through public comment or testimony has largely passed.

That said, the system does provide some avenues for customer participation. The NC Public Staff actively monitors utility filings and can be contacted by customers who have concerns about billing practices or believe they have been charged incorrectly. Future rate cases will open new opportunities for public comment, and advocacy organizations that monitor utility proceedings often publish notices when those proceedings begin.

Customers who want to reduce their exposure to rate increases have a few tools available. Energy efficiency investments, whether weatherization, insulation upgrades, or more efficient appliances, reduce overall consumption and therefore reduce the dollar impact of any given rate level. Duke Energy Carolinas has historically offered rebate programs for certain efficiency upgrades, though the specific programs available at any given time should be confirmed directly with the utility.

Looking Ahead: The Next Round

The 2023 rate cases are closed, but Duke Energy will file again. Utilities of this scale file rate cases on a recurring basis, typically every few years, as their capital investment programs generate new cost recovery needs. The energy transition investment required under HB 951 is large and ongoing, which means the pressure toward future rate increases has not gone away.

Consumer and environmental advocates in North Carolina are already engaged in the longer-term question of how those costs should be distributed across customer classes and across geographic regions. The east-west rate differential is a persistent issue that comes up in utility policy discussions, and some advocates argue that the structure of having two separate subsidiaries with separate rate bases creates an inherent inequity that legislative or regulatory reform could address.

Whether that kind of structural reform happens depends on the political and regulatory environment in Raleigh. For now, the NC Supreme Court has affirmed the current structure as legally sound, and western NC residents will continue paying Duke Energy Carolinas rates that differ from what their neighbors east of the piedmont pay.

For anyone thinking about what long-term utility costs mean for a property in Macon County or the Cashiers plateau, understanding the rate structure and how it is likely to evolve is a real part of evaluating the cost of living here, and it is one more reason to work with someone who knows this market from the inside.

 

Frequently Asked Questions

Why do western NC and eastern NC pay different electricity rates to Duke Energy?

Western North Carolina is served by Duke Energy Carolinas (DEC), while eastern and central North Carolina is served by Duke Energy Progress (DEP). Although both subsidiaries fall under the Duke Energy Corporation umbrella, they are legally distinct entities that file separate rate cases with the NC Utilities Commission. Because each subsidiary has its own infrastructure costs, capital investments, and regulatory history, the rates they charge customers can and do differ. The NC Supreme Court ruling confirmed that this geographic pricing difference is legally permissible under state utility law, even when it results in customers on one side of the state paying more than customers on the other.

How much did Duke Energy raise rates in western NC?

The exact approved rate increase figures for Duke Energy Carolinas and Duke Energy Progress are contained in the NC Utilities Commission orders from the 2021 to 2023 rate case proceedings. Recent Duke Energy rate cases in the Carolinas have resulted in increases ranging from roughly 6 to 17 percent depending on customer class and subsidiary, but the specific percentages approved for each subsidiary in these proceedings should be verified directly through the NCUC's public rate case records or Duke Energy's official customer communications. The NCUC publishes all rate case orders on its website and those documents contain the final approved figures.

What is the NC Utilities Commission and does it protect customers in rate cases?

The NC Utilities Commission is a five-member regulatory body appointed by the Governor that reviews and approves utility rate changes in North Carolina. Utilities like Duke Energy cannot raise rates without NCUC approval. The NCUC is supported by the NC Public Staff, a separate state agency that serves as the official consumer advocate in utility proceedings. The Public Staff participates in rate cases, reviews utility filings, and can oppose or negotiate proposed increases on behalf of residential and small commercial customers. Their involvement is a key consumer protection mechanism, though their recommendations are not always adopted in full by the commission.

What is NC House Bill 951 and how does it relate to Duke Energy rate increases?

NC House Bill 951, signed into law by Governor Roy Cooper in 2021, is North Carolina's landmark energy transition legislation. It set carbon reduction targets for utilities and required Duke Energy to develop a carbon plan for transitioning away from coal-fired generation toward renewable and cleaner energy sources. The law authorized Duke Energy to recover the costs of grid modernization and new generation infrastructure through customer rates, which means ratepayers are partly funding the transition to cleaner energy through their monthly bills. Rate increase requests filed since 2021 have cited capital expenditures tied to HB 951 compliance as a justification for higher rates.

Can western NC residents do anything to challenge or reduce their Duke Energy bill after this ruling?

The NC Supreme Court ruling closes off further legal challenges to the rates approved in the 2023 proceedings, meaning those rates stand. However, customers who believe they are being overcharged can file complaints with the NC Utilities Commission. Low-income customers may qualify for assistance programs including Duke Energy's Share the Warmth fund and federal LIHEAP energy assistance. The most direct route for broader change is participation in future rate case proceedings, either personally or through advocacy organizations like the NC Justice Center or the Southern Environmental Law Center, which monitor utility proceedings and sometimes file formal comments or interventions on behalf of customers.