If you're shopping for electricity in Texas, you've probably seen two main options: fixed-rate and variable-rate plans. Both have pros and cons—and which one saves you the most money depends entirely on your goals and how you use electricity.
In this guide, we'll break down exactly how each plan works, show you real examples, and help you decide which is right for your home.
What's the Difference?
Fixed-Rate Plans
With a fixed-rate plan, your electricity rate is locked in for the entire contract term—usually 6, 12, 24, or 36 months. No matter what happens to the energy market, your rate stays the same.
Example: You sign up for a 12-month fixed plan at 12¢ per kWh. In month 6, market rates jump to 18¢ per kWh. Your rate? Still 12¢.
Variable-Rate Plans
With a variable-rate plan, your electricity rate changes monthly based on market conditions. When wholesale prices go down, your rate goes down. When prices go up, so does your rate.
Example: You sign up for a variable plan at 11¢ per kWh in January. By June, market rates drop to 9¢ per kWh, and your rate follows. By November, rates jump to 14¢ per kWh—and your rate increases too.
Side-by-Side Comparison
| Feature | Fixed-Rate | Variable-Rate |
|---|---|---|
| Price Stability | Locked in for contract term | Changes monthly |
| Budgeting | Easy—same bill every month* | Harder—bill fluctuates |
| Market Upside | Limited—rate stays same | High—you benefit from low rates |
| Market Downside | Protected—locked in rate | Exposed—rates can spike |
| Early Termination Fee | Usually $150–$300 | Usually None |
| Best For | Risk-averse budgeters | Flexible users willing to take market risk |
* Base charges and usage still apply. Your total bill = (kWh used × rate) + base charge.
Cost Comparison: Real Examples
Scenario 1: Market Rates Stay Stable
Your usage: 1,000 kWh/month | Contract length: 12 months
- Fixed plan: 12¢/kWh locked in for 12 months = $120/month × 12 = $1,440/year
- Variable plan: Average 12¢/kWh over the year = $120/month × 12 = $1,440/year
Winner: Tie. Both cost the same.
Scenario 2: Market Rates Rise (Market Volatility)
Your usage: 1,000 kWh/month | Contract length: 12 months
- Fixed plan: 12¢/kWh locked in = $120/month × 12 = $1,440/year
- Variable plan: Starts at 11¢, rises to average 14¢ by end of year = ~$130/month average × 12 = $1,560/year
Winner: Fixed-rate plan saves ~$120/year.
Scenario 3: Market Rates Fall (Favorable Market)
Your usage: 1,000 kWh/month | Contract length: 12 months
- Fixed plan: 12¢/kWh locked in = $120/month × 12 = $1,440/year
- Variable plan: Starts at 12¢, drops to average 9¢ by mid-year = ~$105/month average × 12 = $1,260/year
Winner: Variable-rate plan saves ~$180/year.
Key Insight
Fixed-rate plans protect you when markets are rising. Variable-rate plans reward you when markets are falling—but expose you to spikes. Neither is inherently "better"—it depends on market conditions and your risk tolerance.
Which Plan Should You Choose?
Choose a Fixed-Rate Plan If:
- ✅ You want budget predictability and peace of mind
- ✅ You're risk-averse and don't want rate surprises
- ✅ You're planning to stay in your home for 2+ years
- ✅ Market conditions are uncertain or volatile
- ✅ You have a tight monthly budget and can't absorb bill spikes
Choose a Variable-Rate Plan If:
- ✅ You're comfortable with rate fluctuations
- ✅ You want flexibility to switch providers (usually no early termination fee)
- ✅ You expect market rates to fall or stay low
- ✅ You're willing to take market risk for potential savings
- ✅ You only plan to stay in your home short-term (6–12 months)
Pro Tips for Texas Shoppers
1. Always Check the Electricity Facts Label (EFL)
The EFL shows the average price at 500, 1000, and 2000 kWh usage levels. Use this to compare plans fairly—not just the headline rate.
2. Factor In Your Usage Pattern
A plan that's great for a 1,000 kWh/month user might be expensive for a 2,000 kWh/month user. Your EFL usage tier matters.
3. Watch for Base Charges & Fees
Some plans charge a monthly base fee ($10–$20) that applies even if you use no electricity. This is part of your true cost—check the EFL.
4. Check Contract Terms & Early Termination Fees
Fixed plans often have $150–$300 early termination fees. If you might move, a variable plan (with no fee) might be smarter.
5. Don't Switch Too Often
Constantly switching for a slightly lower rate wastes time and can be penny-wise, pound-foolish. Stick with a plan for at least 6 months.
Ready to Compare Plans?
Rates vary by ZIP code and usage level in Texas. Use Ambit's plan comparison tool to see fixed and variable options available at your address.
View Plans by ZIP CodeBottom Line
Fixed-rate plans are best for budget certainty and protection against market spikes. Variable-rate plans offer flexibility and upside potential when rates fall, but with market risk.
There's no one-size-fits-all answer. Look at your risk tolerance, budget, and how long you plan to stay in your home. Then compare the Electricity Facts Label (EFL) for actual pricing at your usage level.
Questions? Call us at 361-582-9724. As your local Ambit Energy consultant, we're here to help you understand your options and find the plan that works best for you.