PJM Capacity Auction: What Business Owners Need to Know in 2026

A restaurant owner in Columbus opens her July 2026 electric bill and sees a charge she does not recognize. It is not the kilowatt-hours she burned running the walk-in coolers and the exhaust fans. It is a separate line, sometimes labeled "capacity" or "PLC charge," and it climbed noticeably from the prior year. Her supplier had warned her about it during contract renewal, but the full impact only landed when the invoice arrived.

That charge traces back to a wholesale auction run by PJM Interconnection, the grid operator covering Ohio, Pennsylvania, New Jersey, most of Maryland, Delaware, Virginia, West Virginia, Illinois, Indiana, Michigan, North Carolina, and Washington DC. If your business operates in any of those states, the PJM capacity auction shapes a meaningful slice of your electric costs every single year.

PJM runs a forward capacity market called the Reliability Pricing Model, or RPM. Once a year, PJM holds a Base Residual Auction (BRA) roughly three years ahead of the delivery year. The 2026/27 delivery year auction, for example, cleared capacity that generators must now hold available from June 2026 through May 2027.

The purpose is straightforward: ensure there is always enough generation and demand-response capacity on the grid to meet peak load, even on the hottest afternoon of the summer. Generators, demand-response providers, and importers bid in. PJM sets a clearing price based on the intersection of the supply stack and the demand curve. Every resource that clears gets paid that price per megawatt-day for the full delivery year.

Because PJM divides its footprint into Locational Deliverability Areas (LDAs), prices can vary significantly by zone. A business in the ComEd zone of Illinois may see a different capacity price than one in the ATSI zone that covers most of Ohio or the PECO zone in eastern Pennsylvania. Transmission constraints between zones are the main reason prices diverge.

Capacity costs do not flow automatically from PJM to your meter. They move through your retail supplier or, if you are on your utility's default service, through the regulated default supply rate.

In Ohio, customers who have not chosen a supplier sit on the utility's Standard Service Offer (SSO). In Pennsylvania, the default is called Price to Compare. In New Jersey, it is Basic Generation Service (BGS). In Washington DC, it is the Standard Offer Service (SOS). Each state's utility commission oversees how those default rates are set and how often they reset: the Public Utilities Commission of Ohio (PUCO), the Pennsylvania Public Utility Commission (PA PUC), the New Jersey Board of Public Utilities (NJBPU), and the DC Public Service Commission (DC PSC) each have distinct rules.

When you sign with a retail supplier, the supplier has already paid or hedged its capacity obligation. That cost is embedded in your supply rate, sometimes as a fixed bundled price per kWh, sometimes as a pass-through line that adjusts when PJM capacity prices change. Pass-through contracts give you visibility but also exposure. Fixed-price contracts transfer the risk to the supplier, usually at a premium.

For businesses that cross their utility's demand threshold (the specific kW level varies by utility and tariff), demand charges also appear on the delivery side of the bill. Those are separate from capacity charges, though both respond to the same peak-usage behavior.

The 2026/27 delivery year auction drew significant attention because of tightening reserve margins across the PJM footprint. Retirements of older thermal generation, slower-than-expected entry of new resources, and rising load forecasts driven partly by data center growth in Virginia and elsewhere combined to push the supply curve leftward relative to recent years.

The clearing prices that emerged from the 2026/27 auction were materially higher than those from several prior delivery years. Because PJM publishes official auction results publicly, business owners and their energy advisors can review the exact clearing prices by zone at PJM's website. The key point is directional: capacity costs flowing into commercial contracts and default service rates for the June 2026 through May 2027 period reflect an environment where grid adequacy is under genuine pressure.

For Ohio businesses on SSO rates or Pennsylvania businesses on Price to Compare, the higher capacity costs are baked into the default rates their utilities filed with PUCO and PA PUC respectively. For businesses that locked fixed-price supplier contracts before the auction cleared, those costs are already hedged. For businesses on variable or pass-through contracts, the increase shows up directly.

Visit ElectricRates.org's business electricity section to compare live supplier rates across Ohio, Pennsylvania, New Jersey, and DC as of July 2026.

Understanding the mechanics helps business owners anticipate future auction outcomes and time contract decisions more deliberately.

Retirement of older plants. Coal and older gas units that cannot clear the auction economically deactivate. Each retirement tightens the supply stack unless new capacity replaces it on schedule.

Load growth from electrification and data centers. PJM's load forecast has risen in recent years as hyperscale data centers continue to locate in the region and as some industrial and commercial loads shift to electricity. A higher demand curve raises the clearing price when supply is constrained.

Transmission constraints between LDAs. Even when overall PJM supply looks adequate, local constraints can isolate certain zones and produce elevated local clearing prices. Businesses in constrained zones, such as parts of New Jersey or eastern Pennsylvania, have historically seen higher locational capacity costs.

Demand-response participation. Large commercial and industrial customers that enroll in demand-response programs can bid their load curtailment into the capacity market as a supply-side resource. That participation helps suppress clearing prices and generates revenue for enrolled customers.

Policy and regulatory uncertainty. State renewable portfolio standards, emissions regulations, and federal policy shifts all influence which resources choose to participate in PJM auctions and at what price.

Two of the six deregulated markets ElectricRates.org covers, Texas and Massachusetts, sit outside PJM entirely.

Texas runs ERCOT, which operates an energy-only market without a centralized capacity auction like PJM's RPM. Texas businesses do not see a PJM capacity charge, but they face their own reserve adequacy challenges, reflected in scarcity pricing during peak hours. The Public Utility Commission of Texas (PUCT) oversees retail market rules.

Massachusetts businesses fall under ISO-New England, which runs its own forward capacity market called the Forward Capacity Auction (FCA). The mechanics resemble PJM's RPM, but the clearing prices, zones, and delivery year calendar differ. The Massachusetts Department of Public Utilities (MA DPU) oversees retail supplier licensing in that state.

For business owners comparing suppliers across multiple states, the underlying capacity market structure shapes what suppliers can and cannot offer in each territory. A fixed-price quote in Texas hedges against ERCOT scarcity risk. A fixed-price quote in Ohio or Pennsylvania hedges against PJM capacity auction volatility. They are different bets.

Business owners cannot opt out of capacity charges entirely, but they can manage their exposure in several ways.

Choose the right contract structure. Fixed-price, all-in contracts lock capacity costs at the time of signing. If PJM capacity prices rise after you sign, your supplier absorbs the increase. If prices fall, you pay the higher locked rate. Pass-through contracts work in reverse: you see the actual market cost but carry the volatility risk.

Reduce your peak contribution. PJM assigns each customer a Peak Load Contribution (PLC) factor based on their load during the five highest demand hours of the prior summer (typically called the Five Coincident Peak, or 5CP, hours). A lower PLC means a lower capacity obligation and lower costs. Businesses that curtail load during those critical hours, or work with a supplier offering 5CP alerting programs, can permanently reduce their capacity bill.

Enroll in demand response. Qualifying commercial customers in PJM territories can register load curtailment as a capacity resource. The program pays participants per kW of curtailment capability and reduces the net capacity cost.

Compare suppliers before the next contract renewal. Default service rates in Ohio, Pennsylvania, New Jersey, and DC reset periodically and embed whatever capacity costs the utility has hedged. Retail suppliers competing for your business have different procurement strategies and may offer more favorable terms depending on timing. Comparing quotes at ElectricRates.org's business electricity page takes a few minutes and shows live rates from multiple suppliers.

Audit your tariff class. Some businesses are assigned to tariff classes with demand charge thresholds that do not match their actual load profile. Moving to a tariff that better fits your usage pattern can reduce both delivery-side demand charges and the way capacity costs are allocated.

PJM publishes its auction schedule well in advance. The Base Residual Auction for the 2027/28 delivery year will clear in 2025 under the standard three-year forward horizon, and those results will begin influencing supplier pricing for contracts covering June 2027 onward.

Business owners who sign contracts in the months immediately after an auction clears tend to see the freshest capacity price embedded in supplier quotes. Those who sign contracts mid-delivery year may be catching up to prices the market has already digested.

Energy brokers and consultants who specialize in commercial accounts monitor auction results and can help businesses identify windows when forward capacity costs look relatively favorable. That said, market timing is genuinely difficult. A disciplined approach to contract length, structure, and supplier comparison usually produces better outcomes than trying to perfectly time capacity market cycles.

The PJM capacity auction is not an abstraction. It is a real cost that flows through your supplier contract or your utility's default rate and appears on your bill every month. The 2026/27 auction results have already set the capacity cost floor for this delivery year. The question for most businesses is whether their current contract structure is appropriate for the environment ahead.

Review your current contract type (fixed vs. pass-through), check when your agreement expires, and ask your supplier or broker to explain exactly how capacity is priced into your rate. If you are on your utility's default service in Ohio, Pennsylvania, New Jersey, or DC, compare that to what competing suppliers are offering right now.

For live business electricity rates across all six deregulated markets as of July 2026, visit ElectricRates.org.