Hourly Average vs Daily Average Electricity Pricing: A Practical Guide (2026)

If you’ve ever looked closely at your electricity bill and wondered why your cost per kilowatt-hour doesn’t match the “rate” your utility quotes, part of the answer often lies in how prices are averaged — and over what time window. Understanding the difference between hourly pricing and daily average pricing is increasingly practical knowledge as more utilities roll out real-time and time-varying rate options.

The Basics: How Electricity Prices Vary

Wholesale electricity prices — the prices at which generators sell power into the grid — change constantly. In organized wholesale markets like PJM, ERCOT, MISO, and NYISO, prices are set every five minutes based on real-time supply and demand. Over the course of a day, prices might range from near zero (or even negative, during periods of excess wind generation) to several hundred dollars per megawatt-hour during a heat wave afternoon.

Most retail electricity customers don’t see this volatility directly. Their utility or retail electricity supplier buys power on their behalf and passes through a smoothed, averaged rate. But the way that averaging is done — and over what time window — meaningfully affects how much price risk you bear and what behaviors save you money.

Hourly Average Pricing

In hourly pricing structures, your electricity cost per kilowatt-hour is calculated as the average wholesale price over each individual hour of the day, plus a supply margin and delivery charges. This means that what you pay at 2:00 PM on a hot Tuesday in July is genuinely different from what you pay at 2:00 AM on the same day.

Hourly pricing creates strong incentives to shift flexible loads — dishwashers, laundry, EV charging, water heater operation — to low-price hours. If you can run your EV charger between 11 PM and 6 AM instead of 5–8 PM, and if your supplier passes through hourly prices, the savings can be real: peak/off-peak price ratios in tight grid conditions regularly exceed 3:1, and can be much higher during extreme events.

The tradeoff is bill volatility. In a month with several extended heat waves, hourly price customers can see their effective rate climb substantially — even if their total consumption is the same as a cooler month — because they’re paying elevated prices during high-demand hours. Hourly pricing puts real-time market risk in the customer’s hands.

Daily Average Pricing

In daily average pricing, all consumption during a calendar day is billed at a single rate: the average of that day’s hourly wholesale prices (or some similar calculation), plus margins. You don’t get different prices for 3 AM versus 3 PM — everything from midnight to midnight is billed at one daily rate.

This structure reduces the precision of price signals but maintains some day-to-day variability. A day with unusually high wholesale prices (say, a grid emergency) will cost more per kWh than a mild-weather weekday with abundant renewable generation. But the optimization granularity is at the day level, not the hour level.

For customers who can’t shift loads within a day but can adjust usage patterns across days (for example, a business that can defer energy-intensive production to a lower-priced day), daily average pricing is more actionable than hourly pricing without the extreme real-time volatility.

Fixed Rates: The Smoothed Alternative

Most residential customers in both regulated and deregulated markets are on some form of fixed rate — a single price per kWh that doesn’t vary by time of day, day of week, or season (beyond scheduled seasonal rate changes). Fixed rates represent the most extreme form of averaging: the supplier absorbs all price volatility and passes through a blended rate that includes a risk margin for doing so.

The advantage is bill predictability. If you know your typical monthly usage, you can predict your bill accurately. The disadvantage is that you pay for the supplier’s risk margin whether or not market prices are volatile in a given month, and you have no financial incentive to shift usage to low-cost periods.

In deregulated markets, fixed-rate supply contracts from competitive retailers are one of the most common product structures. Contract lengths typically range from 3 months to 36 months, with longer contracts generally commanding a slightly higher rate to compensate the supplier for extended price risk exposure.

Time-of-Use Rates: Structured Hourly Averaging

Time-of-use (TOU) rates are a middle ground — they create pre-defined pricing tiers by time of day (typically “on-peak,” “mid-peak,” and “off-peak”) rather than setting prices to exactly match real-time market conditions. The tier prices are set in advance (often seasonally) based on expected demand patterns.

TOU rates give customers a predictable price signal they can act on — “off-peak is always cheaper, so I’ll schedule my dishwasher for 10 PM” — without exposing them to minute-by-minute or even hour-by-hour market price swings. They’re the most widely deployed time-varying rate structure in the U.S.

How to Choose the Right Structure in a Deregulated Market

In deregulated states where you can choose your electricity supplier, the supply portion of your bill (as opposed to the delivery/distribution charge, which is fixed by your utility) is where rate structure matters most. Here’s how to think about the choice:

If your schedule is flexible and you’re comfortable shifting loads — particularly EV charging and water heating — to overnight or mid-day hours, a time-of-use or hourly product from a competitive supplier can produce meaningful savings. The key is actually following through on the behavior change; the savings don’t materialize if you keep charging your EV at 6 PM regardless of rate.

If your schedule is rigid (you work from home, you have medical equipment with continuous power needs, or you simply can’t control when you use electricity), a fixed-rate supply contract eliminates price risk and lets you budget accurately.

If you have rooftop solar with net metering, the rate structure interacts with your solar export value — understanding what your supplier pays for excess generation during different periods matters as much as what they charge you for consumption.

Frequently Asked Questions

Which type of pricing saves the most money on average?

Over long time horizons, customers who successfully shift usage to low-price hours on hourly or TOU rates typically pay less than fixed-rate customers, because fixed rates include a risk premium. But the savings require behavioral change, and the outcome is uncertain in any given month. Fixed rates win on predictability; variable/TOU rates win in expectation for flexible customers.

Can I switch between rate structures?

In deregulated markets, yes — when your current supply contract expires, you can switch to a different product from the same or a different supplier. Some suppliers offer contract-free or month-to-month options that make switching easier, though month-to-month variable rates expose you to full market volatility.

Do smart meters support hourly pricing?

Hourly pricing requires a meter that records consumption in hourly (or shorter) intervals — a smart meter or advanced metering infrastructure (AMI) device. Most utilities have deployed AMI across their service territories, but if you’re unsure, contact your utility to confirm your meter type.

What’s a “real-time pricing” program?

Real-time pricing (RTP) programs pass through actual wholesale prices — updated hourly or every 5 minutes — directly to retail customers, plus margins and delivery charges. These programs exist in Illinois (ComEd’s Hourly Pricing program), New York (some NYISO-linked retail products), and a handful of other markets. They offer the highest possible savings opportunity for truly flexible customers, but also the highest price risk.

How do daily average rates handle extremely high-price days?

In most daily average structures, an extremely high-price day (like a grid emergency event) results in a higher cost per kWh for all consumption that day — including usage that happened during low-price morning hours. This is one argument for hourly pricing: on a high-price-afternoon day, your morning usage would be billed at the actual low morning rate, not the elevated daily average. Whether this is better or worse for you depends on your consumption profile.

Are hourly pricing programs available to residential customers?

In most markets, hourly pricing is most common for commercial and industrial customers who have the metering infrastructure and the flexibility to respond to price signals. Residential hourly programs exist (ComEd in Illinois is the prominent example) but are still less common than fixed or TOU rates for residential accounts.

As grid operators deploy more intermittent renewable resources, price volatility during certain hours will increase — making the distinction between hourly, daily, and fixed rates increasingly consequential. In deregulated markets, understanding which structure fits your life is part of getting the most value from your ability to choose your supplier. If you haven’t shopped electricity rates recently, now is a good time to compare what’s available in your area.