Critical Peak Pricing Plans Explained (2026 Guide)

Critical peak pricing (CPP) is a type of electricity rate plan that charges normal rates the vast majority of the year and then dramatically higher rates — often 5x to 10x normal — during a handful of declared “critical peak” hours each year. The trade-off is that the off-peak rate is lower than a flat plan. If you can shift or curtail use during the 60–100 critical event hours per year, CPP can cut your annual bill 5–15%. If you cannot, you pay a steep penalty. This guide explains how CPP plans work, who they fit, and how to decide whether one belongs on your shortlist.

What Is Critical Peak Pricing?

Critical peak pricing is a demand-response rate design that prices electricity at one rate for most of the year and a much higher rate during a limited number of pre-defined critical event hours. Utilities and competitive suppliers call these events when wholesale prices spike or grid reliability is at risk — typically the hottest summer afternoons, the coldest winter mornings, or grid emergencies.

A typical CPP structure: a normal rate of around 9–11 cents per kWh applies for ~99% of hours in the year, and a critical peak rate of 60 cents to $1.50 per kWh applies during 60–100 declared event hours (usually 2–6 PM on weekdays from June through September). Customers receive day-ahead notice of an event call by app, text, or email.

CPP vs Time-of-Use vs Real-Time Pricing

CPP is one of four major dynamic-pricing structures, and the differences matter:

• Flat rate: One price per kWh every hour of the year. Simple, no shifting required, but no upside.
• Time-of-use (TOU): Pre-defined “peak” hours (e.g., 3–8 PM weekdays) carry higher rates year-round. Predictable but no extreme spikes.
• Critical peak pricing (CPP): Normal rates most of the year, with 60–100 declared event hours at sharply higher prices. Customer gets advance notice.
• Real-time pricing (RTP): Wholesale market price every 5 or 60 minutes, passed through directly. Highest savings potential, highest risk, no advance warning.

CPP sits between TOU and RTP on the risk-reward curve. Compared with TOU you have many fewer expensive hours per year, but the price differential during those hours is far steeper. Compared with RTP, you get day-ahead notice and a known number of events, but you give up the upside of the cheapest off-peak overnight hours.

Who Offers CPP Plans?

In regulated states, the local IOU may offer CPP as an opt-in residential program. California’s three big IOUs (PG&E, SCE, SDG&E) run CPP programs for commercial customers and have piloted residential versions. Florida Power & Light, Duke Energy Carolinas, Arizona Public Service, Salt River Project, and several Texas utilities have CPP options. In deregulated states, competitive suppliers occasionally market CPP plans branded as “smart-saver” or “demand-response” plans — read the contract carefully because the trigger conditions vary widely.

How the Math Works

The economics of CPP come down to four numbers: the off-peak rate, the critical-peak rate, the number of event hours per year, and your ability to shift load during those hours.

Worked example. A flat-rate plan charges 13 cents/kWh. A CPP plan charges 10 cents off-peak and $1.00 during 80 critical event hours per year. Annual usage: 14,000 kWh, of which 320 kWh would normally fall during event hours (roughly 4 kWh/hr × 80 hours).

Flat plan cost: 14,000 × $0.13 = $1,820.
CPP plan, no shifting: 13,680 × $0.10 + 320 × $1.00 = $1,368 + $320 = $1,688. Savings: $132/yr.
CPP plan, 70% load shift during events: 13,680 × $0.10 + 96 × $1.00 = $1,368 + $96 = $1,464. Savings: $356/yr.
CPP plan, no shifting AND heavy usage on event days (640 event-hour kWh): savings flip — $1,360 + $640 = $2,000. You pay $180 more.

The lesson: CPP rewards behavior change, not consumption alone. A household with no flexibility (medical equipment, mandatory cooling, kids home in summer) can lose money. A household with flexibility (pre-cool the house, set the pool pump to overnight, run the dryer at 10 PM) wins.

What Load Can You Actually Shift?

The big residential loads that lend themselves to shifting during a 2–6 PM event window:

• HVAC pre-cooling: Drop the thermostat to 68°F at noon, let it drift up to 78°F during the event. Captures the largest dollar savings.
• EV charging: Schedule to start at 9 PM (after event window). Easy with any modern Level 2 charger.
• Pool pump: Run overnight rather than mid-afternoon.
• Laundry, dishwasher: Defer to evening or overnight.
• Battery storage: Charge overnight, discharge during the event. Cuts critical-hour grid draw to near zero.
• Smart thermostat with utility integration: Honeywell, ecobee, and Nest models can receive event signals and pre-condition automatically.

Loads you cannot meaningfully shift: refrigerators and freezers, medical devices, lighting in occupied rooms, work-from-home compute.

Behavioral Risk: Heat-Wave Stacking

The biggest behavioral hazard with CPP is that event days are nearly always also the hottest, most uncomfortable days of the year. Telling yourself in February that you will let the house drift to 80°F in August is easy. Doing it in August with three kids home from school and a dog is harder. Some utilities report that 20–30% of opt-in CPP customers fall back to non-event behavior by the second summer. If you sign up, set automation rules in advance — do not rely on willpower.

Should You Take a CPP Plan?

CPP fits households that meet at least three of these criteria:

• You have a smart thermostat or can install one.
• Your home insulates well enough to coast 3–4 hours without active cooling.
• You can defer EV charging, laundry, dishwasher to off-peak hours.
• You are willing to receive day-ahead alerts and adjust behavior.
• You have battery storage, solar, or both.

CPP is a poor fit for households with medical cooling needs, work-from-home occupants who must keep the office cool, families with very young children or pets that cannot tolerate temperature drift, or anyone who finds the cognitive load of dynamic pricing stressful.

FAQ

How many CPP events per year should I expect? Most programs cap at 12–15 event days, with each day running 4–6 hours. That works out to 60–90 event hours per year.

What notice do I get before a CPP event? Day-ahead — typically by 4 PM the previous day, by app, text, or email.

Can a utility call a CPP event with zero notice? No. CPP is defined by advance notice. Real-time pricing (RTP) is the structure that exposes you to live wholesale prices without warning.

What happens if I run my AC normally during an event? You pay the critical peak rate on every kWh consumed during the event window. A typical event-hour kWh penalty is $0.40–$0.80 above the off-peak rate.

Is CPP available in all 50 states? No. CPP is most common in California, Texas, Florida, the Carolinas, Arizona, and parts of the Midwest. Many states do not offer residential CPP at all.

Can I get out of a CPP plan mid-year? Most utility programs let you opt out at any time. Competitive supplier contracts may have early-termination fees — read before you sign.

Bottom Line

Critical peak pricing is one of the highest-leverage rate plans available to disciplined households with controllable load. The savings on 99% of the year are modest. The penalty during 60–100 event hours is severe. Sign up only if you have a credible plan to shift 50–80% of your event-hour load, and automate it before your first summer — willpower fades, smart thermostats do not.