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Understanding the Difference Between Fixed & Variable Rates

Written By: David Cosseboom | Updated On: February 26th, 2025

As you are shopping for a new electric or natural gas provider you will notice that some plans have fixed rates, variable rates or even a combination of both. It’s important that you understand the difference and how this can impact your monthly utility bill before entering a contract. Also keep in mind many providers have contracts that are different lengths and that there can be an early termination charge.

What Is a Fixed Rate?

A fixed rate or fixed pricing refers to a price per unit of electricity (kilowatt-hour) or natural gas (therm) that is set and won’t change for a period of time. A fixed rate is a guarantee that your rate will not change during that time even if the market fluctuates.

Pros

  • Consistent pricing throughout your contract
  • Easier to budget and anticipate your utility bill
  • Keep a lower rate even if the market adjusts higher

Cons

  • Possible to have a higer rate if the market fluctuates lower

What Is a Variable Rate?

A variable rate or variable pricing allows your rate to adjust upwards and downwards to match any market fluctuations. It is important to understand:

  • How often your rate can change. Some providers will adjust on a monthly, weekly or even daily basis.
  • What the maximum price you can be charged is or if there is no limit to how high the rate can go. You should be aware if you are protected in the case the market price increases dramatically.
  • How does the provider set the rate. Some providers will have a specific formula they use and others may use a non-specific method tied to market price.

Why Do Utility Rates Change?

Utility rates change at different frequencies depending on several factors:

  1. Regulatory Changes: Utility rates are typically subject to regulation by government agencies at the local, state, or national level. Changes in these regulations can lead to adjustments in utility rates. These changes typically occur after regulatory reviews or legislative actions.
  2. Market Conditions: Fluctuations in energy markets, such as changes in the prices of fuel commodities like natural gas or coal, can impact utility rates. These changes occur very frequently, sometimes even daily, based on market dynamics.
  3. Infrastructure Investments: Utility companies may need to upgrade or incur maintenance on their infrastructure, such as power plants, transmission lines, or water treatment facilities. These investments can lead to changes in utility rates to cover the costs. These types of increases in utility rates occur infrequently.
  4. Demand-Side Factors: Changes in consumer demand for utilities, such as during peak usage periods or due to shifts in population or economic activity, can influence utility rates. These changes may result in adjustments to rates to manage supply and demand balance.
  5. Environmental Policies: Policies aimed at promoting renewable energy sources or reducing carbon emissions can also impact utility rates. For example, mandates for renewable energy targets or carbon pricing mechanisms may lead to changes in utility rates over time.

Utility rates often change seasonally, but they can also change periodically or in response to specific events or conditions, and the frequency of these changes can vary based on a range of factors affecting the utility industry and the broader economy.

FAQs About Fixed & Variable Rate Plans

What is the difference between a fixed-rate and a variable-rate electric plan?

Fixed-Rate Plan: The price per kilowatt-hour (kWh) remains the same throughout the contract term, typically ranging from 6 months to 3 years. This provides price stability and protection against market fluctuations.
Variable-Rate Plan: The price per kWh can change monthly based on market conditions, energy demand, and other factors. This means your bill can vary significantly from month to month.

Which type of plan is more cost-effective?

Fixed-Rate Plan: Generally more predictable and can be cost-effective if energy prices rise during your contract term.
Variable-Rate Plan: Can be cheaper if energy prices drop, but it also carries the risk of higher costs if prices increase.

Are there any penalties for switching plans?

Fixed-Rate Plan: Often includes early termination fees if you switch providers or plans before the contract ends.
Variable-Rate Plan: Typically does not have long-term contracts or early termination fees, offering more flexibility to switch plans or providers.

How do I know which type of plan is right for me?

Fixed-Rate Plan: Ideal for those who prefer budget certainty and want to avoid the risk of price spikes.
Variable-Rate Plan: Suitable for those who are comfortable with price fluctuations and may benefit from lower rates when market prices drop.

Can I switch from a fixed-rate to a variable-rate plan (or vice versa)?

Yes, but you may need to wait until your current contract term ends or pay an early termination fee if you’re on a fixed-rate plan. Always check the terms and conditions of your current plan before switching.

What happens when my fixed-rate contract ends?

Your plan may automatically switch to a variable-rate plan or a month-to-month fixed-rate plan, often at a higher rate. It’s important to review your options and renew or switch plans before the contract ends to avoid unexpected rate increases.

Are variable-rate plans riskier?

They can be, as your rates can increase significantly during periods of high energy demand or market volatility. However, they also offer the potential for lower rates when market prices are down.

Do fixed-rate plans have any disadvantages?

The main disadvantage is that if market prices drop, you’re locked into a higher rate until your contract ends. Additionally, there may be early termination fees if you decide to switch plans before the contract term is up.

How do I compare fixed and variable-rate plans?

Look at the current rates, contract terms, early termination fees, and any additional charges. Consider your energy usage patterns and whether you prefer price stability or are willing to take on some risk for potential savings.

About the Author

David Cosseboom Author Image

David has been an integral part of some of the biggest utility sites on the internet, including InMyArea.com, HighSpeedInternet.com, BroadbandNow.com, and U.S. News. He brings over 15 years of experience writing about, compiling and analyzing utility data.