Variable-rate plan:A variable-rate plan means the rate you pay for your electricity may fluctuate based on the market price of energy. Energy price depends on many factors, like weather, demand, fuel prices, the distribution system and the market. Variable-rate plans are flexible because you are not locked into a contract; however, you’ll pay a higher price in high-demand seasons like summer. A variable-rate plan might be ideal for you if you like to shop around and keep an eye on prices.
Minimum Usage Fees: Often set at or around 1,000 kWh/month, these fees mean you’ll always pay for at least that amount — even if you only use, say, 800 kWh of electricity some months. It sounds nasty, but it’s only something to be concerned about if your electricity bills historically show you hover right around that minimum use threshold. If you’re electricity use always exceeds that amount, it’s like it’s not even there.

Sometimes you will see surprises in the EFL that could have a hug impact on the electricity rate you actually pay.  For example, there may be a bill credit that kicks in once your usage hits 2000 kWh in a month.  This has the effect of driving down the average electricity rate you would pay at 2000 kWh.  But if at the end of the month, you used only 1999 kWh your electricity bill could actually be much higher.

The Electricity Facts Label (EFL) is the industry standard document that contains all the fine print about an electricity plan.  In it you will find all of the components that make up the electricity rate that is advertised for that plan.   You will find the rate you should expect to pay at 3 standard levels of monthly usage in Houston:  500kWh, 1000 kWh, and 2000 kWh hours.
And just like with any plan, it’s worth it to do the math to see how different scenarios will affect your bill. Take, for example, a home in Sweetwater that uses about 1,000 kWh of energy per month, and is interested in the Texas Essentials 12 plan. Zero percent renewable energy is the cheapest option — but by committing to a $5 monthly charge for its 100 percent “JustGreen” option, it’s actually cheaper than the 60 percent hybrid renewable option.
The Bayou City is diverse in its population, culture and electricity rates. Houston attracts college students who attend well-known schools in the area such as Texas Southern University, University of Houston and Rice University. Also, Houston's entertainment and year-round events appeal to young couples and families. Attend an Astros game in Minute Maid Park or visit the Houston Zoo – there's always something happening in H-town.