Molly Ayala
Electricity rates are determined by a variety of factors, including location, building type, and energy consumption. These rates can vary significantly across different states, with North Dakota having the lowest average electricity rate and Hawaii having the highest. Most electricity customers are on a flat-rate plan, meaning they pay a fixed price for electricity regardless of the time of day or month. However, time-varying rates are also available, where the price of electricity changes throughout the day based on demand. Understanding these rates and how they are calculated can help consumers make informed decisions about their energy usage and explore ways to reduce their electricity bills.
| Characteristics | Values |
|---|---|
| Calculating your electricity bill | Multiply the amount of electricity you used by your electric rate |
| Average electricity rate in the US | 15.95 cents per kilowatt-hour |
| Cheapest electricity rates | North Dakota (9.93-10.21 cents/kWh) |
| Most expensive rates | Hawaii (40.51-42.34 cents/kWh) |
| Time-varying rates | The price you pay for electricity varies throughout the day |
| Flat electricity rate plan | Fixed price for all the electricity you use per month |
| Factors affecting electricity rates | Location, type of building, customer class, energy consumption, load factor, and type of energy generation |
| Tools to determine electricity rates | Electricity cost calculator, Utility Rate Database (URDB) |
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What You'll Learn
Time-varying rates
Time-varying electricity rates, or time-of-use (TOU) rates, are designed to let consumers know when it is costlier or less efficient to use electricity, and when it is cheaper. The actual cost to the system of producing electricity varies over times of day, days of the week, and seasons. For example, on hot summer days when everyone has their air conditioning on, it is more expensive to produce electricity than during the middle of the night when most people are asleep and fewer appliances are being used.
TOU rates vary throughout the day, with utilities creating different time blocks over the year and setting rates according to how expensive it is to generate electricity during those times. For example, Southern California Edison (SCE) has on-peak, mid-peak, off-peak, and super off-peak hours that occur at different times seasonally, as well as on weekdays versus weekends and holidays. In the default SCE TOU rate, the peak period is between 4 pm and 9 pm, but electricity is priced differently during these hours in summer and winter.
There are also other time-varying rate plans, such as critical peak pricing plans (CPP), where you may pay a slightly reduced rate during most hours and a very high price during the "super-peak" hours, which are often the 40 or 100 highest-stress hours of the year.
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Calculating your bill
Electricity rates are the price per kilowatt-hour (kWh) that a home or business pays for electricity. The average electricity rate across the United States varies from 7.18 cents per kWh to 42.34 cents per kWh, depending on your location and class type (residential or commercial). The average rate in the U.S. is 15.95 cents per kWh.
Most electricity customers are on a flat electricity rate plan, which means that there is a fixed price for all the electricity used per month, regardless of the time of day, week, or month. For example, a flat rate of 15 cents per kilowatt-hour (c/kWh) means that the rate stays constant whether you are watching TV in the morning, running your dishwasher overnight, or doing laundry on the weekends. As a result, calculating your monthly electricity bill is straightforward: multiply the amount of electricity you used that month by your electric rate. So, if you use 600 kWh in a month at a flat rate of 15 c/kWh, your monthly electricity bill would be $90.
However, there are also time-varying rates, where the price of electricity changes throughout the day. Time-varying rates are designed to align electricity usage with the actual cost of producing that electricity. For example, on hot summer days when everyone is using their air conditioners, it is more expensive to produce electricity, so utilities may charge more during those times. The most common time-varying rates for residential consumers are time-of-use (TOU) rates, which are becoming more popular for customers with solar power. In Southern California Edison (SCE), the default TOU rate has on-peak, mid-peak, off-peak, and super off-peak hours, with different rates for weekdays, weekends, and holidays.
To calculate your electricity bill with a time-varying rate, you need to consider the different rates for each time block and multiply the amount of electricity used during each period by the corresponding rate. You can also use online calculators to estimate your annual electricity cost by entering values such as power consumption, energy price, and usage time.
Additionally, electricity rates vary from state to state, with North Dakota having the lowest average rate of 9.93 cents per kWh and Hawaii having the highest rate of 42.34 cents per kWh or 40.51 cents per kWh. Energy deregulation, such as in Texas, can lead to lower rates, while high population density states like the Northeast tend to have higher rates. Understanding the rate structure of your utility provider can help you make informed decisions to reduce your bill, such as by running appliances during off-peak hours.
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Location and building type
The electricity rate you pay depends on a number of factors, including your location, the type of building you live or work in, and your customer class (i.e. whether you are a residential or commercial customer).
Location is a key determinant of electricity rates. For example, in the US, electricity rates vary from state to state, with North Dakota having the cheapest average electricity rates and Hawaii having the most expensive. These rates can also vary within states, with PECO electricity rates in Philadelphia and surrounding areas, for example, increasing in June 2025.
The type of building you live or work in will also impact your electricity rate. Residential and commercial customers are charged differently, with commercial customers often paying a capacity cost to ensure the electric utility has enough capacity to cover total power use demand.
Additionally, the specific location and type of building can impact the peak hours for electricity usage, which can affect your electricity bill. For example, peak hours can vary by location and season, with electricity prices being higher during hot summer days when everyone is running their air conditioners simultaneously.
To understand your electricity rate and how it is calculated, it is important to refer to your electricity bill. This will outline the total number of kilowatt-hours (kWh) used in a month and the rate you pay per kWh. By understanding these components, you can calculate your monthly electricity costs and make more informed decisions about your energy usage.
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Energy consumption
Calculating your energy consumption can help you lower your electricity usage and save on energy bills. To calculate your energy consumption, you need to know the power of each of your appliances, as well as the time they are used. This information is crucial for understanding your energy usage and choosing the most suitable appliances and energy plans.
For example, let's say you want to calculate the energy consumption of your television. If you know that you watch television for approximately 4 hours every day, you can use that number to estimate the power consumption. By multiplying the wattage of the television by the number of hours used per day and dividing that number by 1000, you will get the daily energy consumption in kWh.
Additionally, it is important to consider the efficiency of your appliances. For instance, washing machines with energy-saving programs or using cold water can reduce consumption. Similarly, ovens with energy-efficient labels and responsible usage can also lower energy consumption.
By understanding your energy consumption, you can make informed choices to improve your energy efficiency and choose the most suitable energy plans or providers.
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Price per unit
The price per unit of electricity, or the price per kilowatt-hour (kWh), is a key component in determining your electricity bill. This value varies depending on various factors, and understanding these factors can help you control your electricity pricing to a certain extent.
Firstly, the price per unit of electricity differs based on your location. In the United States, the average price per kWh ranges from 7.18 cents in North Dakota, the cheapest, to 42.34 cents in Hawaii, the most expensive. These rates can also vary within the same state, depending on the utility area. Similarly, in Europe, the price per kWh varies from country to country. For instance, as of 2024, the price per kWh was $0.365 in Belgium, $0.457 in Italy, $0.458 in Bermuda, $0.433 in the Cayman Islands, $0.359 in the Czech Republic, and $0.226 in Spain.
Secondly, the type of building and customer class (residential, commercial, etc.) impact the price per unit. For example, in North Dakota, the average rate for homes is 10.21 cents/kWh, while for businesses, it is 7.18 cents/kWh.
Thirdly, the time of day and year can affect the price per unit. In areas with time-varying rates, such as TOU (time-of-use) rates, the price of electricity changes throughout the day. Typically, utility providers will have peak and off-peak hours, with higher rates during times of higher demand. For example, on hot summer days when air conditioner usage is high, electricity rates may be higher than during the middle of the night when most people are asleep and fewer appliances are in use. Similarly, in southern states, summer rates are generally higher due to the increased demand for cooling systems, while in northern states, winter rates may be higher due to heating demands.
Finally, the overall energy consumption or the volume of electricity you use can also impact the price per unit. This is because energy suppliers use complex models to forecast demand, and if you are using more energy when demand is high, the supplier's cost to provide that electricity increases, which can lead to a higher rate for the consumer.
It's important to note that electricity rates can be subject to changes due to various factors, including energy generation methods, world events impacting fossil fuel prices, and government regulations. To calculate your electricity bill, you can multiply the amount of electricity you consume (in kWh) by the price per unit (in cents or dollars) for your specific location and customer class. Additionally, you can explore options to reduce your electricity bill by making small changes, such as using energy-efficient appliances and managing your energy usage during peak hours.
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Frequently asked questions
You can find out your electricity rate by referring to your utility bill. This will tell you the price you pay for electricity and how it varies throughout the day and year.
Electricity rates can vary depending on the time of day, time of year, and your location. For example, electricity rates are often higher in the morning when demand is high, and cheaper overnight when fewer appliances are being used.
You can find out the average electricity rate in your state by referring to the Utility Rate Database (URDB) or by checking a website that provides electricity rate comparisons, such as EnergyBot or ElectricChoice.
