When is a bill-credit electricity plan actually cheaper?

A bill-credit plan is only cheaper in the narrow usage band where the credit applies and outweighs its higher energy rate. If your usage falls below the credit threshold (often 1,000 kWh) you forfeit the credit and pay the full higher rate, so a flat fixed-rate plan usually wins at low and sometimes very high usage.

Why does my bill-credit plan cost more some months?

Because Texas usage swings by season. A plan tuned to give a credit at 1,000 kWh can leave you just under the threshold in a mild month — forfeiting the whole credit — so a lighter month can cost more than a heavier one. The visualizer shows this as the sharp step in the cost curve at the credit threshold.

What is the crossover point?

The crossover is the usage level where two plans cost exactly the same per month. Below and above it, a different plan is cheaper. Because a bill-credit plan can cross a flat plan twice, there is often a middle band where the credit plan wins and cheaper options on either side.

Bill-Credit vs Fixed-Rate: The Cost-Curve Visualizer

A Texas bill-credit plan (say, 16¢/kWh with a $40 credit once you hit 1,000 kWh) can look unbeatable at exactly 1,000 kWh — and quietly cost more at 900 or 2,000. Drag the usage slider below and watch the two real cost curves cross. This is the 1,000 kWh illusion, made visible.

The interactive chart needs JavaScript. Here's the short version: at exactly 1,000 kWh the example bill-credit plan (16¢ + $40 credit) costs $120 (12.0¢/kWh) versus $135 for a flat 13.5¢ plan. Drop to 900 kWh and the credit disappears — the bill-credit plan jumps to $144 (16.0¢/kWh) while the flat plan is only $121.50. The advertised "cheapest at 1,000 kWh" plan is the most expensive at 900.

How to read the curve

Two things make the bill-credit line (orange) different from the flat line (blue). First, it starts higher, because its energy rate is higher. Second, it takes a sudden step down at the credit threshold — that vertical drop is the moment the credit kicks in. In the sliver of usage right at the threshold, the orange line dips below the blue one and the bill-credit plan genuinely wins. A single kWh short of the threshold, the credit vanishes and you pay the full higher rate.

Why this matters in Texas

Texas homes swing hard between seasons — a 2,000-square-foot Houston house might pull 1,800 kWh in August and 850 kWh in a mild January. On a plan tuned for 1,000 kWh, that household can land on the wrong side of the credit twice a year. The plan that "won" the advertised 1,000 kWh comparison ends up the loser in most real months. That's why the number that matters is your effective rate at your actual usage, not the marketing rate at exactly 1,000 kWh.

See it for your real plans

Type any two plans' numbers into the boxes above to model your own choice — then let the tool do it across every plan in your ZIP at your real seasonal usage. That's exactly what our Real-Rate Interpolation engine does automatically.

Find your real cheapest plan — no math required

We run this curve on every plan in your area at your actual usage.

Compare Texas Plans at My Usage →