Fixed-Rate vs. Variable-Rate Electricity Plans

Energy prices can change with the weather and demand, especially during Texas summers. But Texans can choose an electricity provider and plan that fits their energy usage and gives them peace of mind. Picking the right plan, like fixed- or variable-rate, helps manage costs and gives you more control over your energy bill.

Understanding the Difference: Fixed vs. Variable

To understand electricity plans, it helps to think about other monthly expenses. You may already be familiar with fixed and variable rates from mortgages or auto loans. Electricity plans work in a similar way, but instead of financial markets, pricing is determined by many factors. For example, energy supply, demand, fuel costs and more can affect rates. 

At a high level, the difference is about risk and consistency:

  • Fixed-rate electricity plans lock in your price per kilowatt-hour (kWh) for the length of your contract.
  • Variable-rate plans have prices that can change month to month based on market conditions.

Both options can make sense depending on your household’s priorities, your usage patterns and your personal tolerance for price changes. 

Fixed-Rate Electricity Plans: Stability and Predictability

For customers who value consistency—like parents budgeting for a family or anyone who prefers a "set it and forget it" approach—a fixed-rate plan is often the most popular choice. With a fixed-rate electricity plan, the price you pay for the energy supply per kWh stays the same for the duration of your agreement. These contracts typically range from 12, 24 or even 36 months.

What Fixed-Rate Plans Do (and Don’t) Mean

It is crucial to understand exactly what "fixed" means in this context to avoid surprises. A fixed-rate plan does not guarantee the same electric bill amount every month. 

Your total bill will still fluctuate month-to-month. This is because your bill is calculated by multiplying your fixed rate by the amount of electricity you actually use. Since you run your air conditioner much more in August than you do in February, your August bill will typically be higher, even though the rate per unit of energy hasn't changed.

It's also important to note that both fixed-rate and variable-rate plans include pass-through charges from the Transmission and Distribution Utility (TDU) in your area, which can change periodically regardless of your energy provider.

What stays constant is your supply rate. This helps shield you from sudden market price spikes. If the cost of natural gas skyrockets or a heatwave puts stress on the grid, your rate per kWh is locked in, protecting you from the market volatility.

Pros and Cons

Pros:

  • Predictable pricing: It makes budgeting easier because you know exactly what the rate calculation will be.
  • Price protection: You are protected from rising electricity prices during volatile market conditions.
  • Long-term peace of mind: You don't have to worry about shopping for a new plan every month or fearing the next heatwave. 

Cons:

  • Market drops: You won’t benefit if market prices drop below your locked-in rate during your contract term.
  • Commitment: These plans generally require a contract. Some plans may include early termination fees if you switch providers before the contract ends. 

Variable-Rate Electricity Plans: Flexibility with Risk

Variable-rate plans offer freedom from long-term contracts. The rate you pay in January might be different from the rate you pay in July.

How Market Conditions Affect You

With a variable plan, rates can vary from month to month, and they can be affected by many factors. For example, rates may be lower at times when demand is low and energy generation is high (like a mild spring day). Or they may also increase quickly during periods of high demand. And in Texas, extreme heat or unexpected winter freezes can also cause the market price of power to jump significantly.

Pros and Cons

Pros:

  • Flexibility: These are typically month-to-month plans with no long-term contract. This is ideal for short-term living situations, such as if you are moving in a few months and don't want to sign a year-long lease.
  • Potential savings: You might save money when market prices are historically low.
  • No cancellation fees: Because there is usually no long-term contract, you can switch plans without penalty. 

Cons:

  • Unpredictability: Rates can change with little notice.
  • Bill fluctuation: Monthly bills may fluctuate significantly, making it very hard to budget, especially during hot summers or cold snaps. 

How TXU Energy Helps You Choose

We believe that an informed customer is a happy customer. TXU Energy offers residential electricity plans designed to match different lifestyles and budgets. Whether you are looking for fixed-rate plans for long-term price security, variable-rate options for short-term flexibility or renewable energy plans for a greener footprint, we have options to fit your life.

We are here to make your energy choice straightforward and worry-free. No matter which plan type you choose, understanding the difference between fixed and variable rates ensures you can feel confident in your decision.