Texas Electricity Calculators: Bill Math, Bill-Credit Cliffs, Switching Break-Even & kWh Cost
Every calculator below uses a step-by-step, one-field-per-row layout backed by verified 2026 PUCT Transmission and Distribution Utility (TDU) delivery tariffs and official Electricity Facts Label (EFL) formulas.
Choose a Calculator
- 1. Texas Electric Bill Calculator
Monthly EFL + 2026 TDU delivery math - 2. Switching & ETF Break-Even
Contract exit & payoff months - 3. Bill-Credit Cliff Analyzer
999 vs. 1,000 kWh penalty check - 4. Free Nights & Weekends Analyzer
Off-peak break-even & daytime rates - 5. Appliance Cost Calculator
Watts to monthly & annual bill - 6. Solar Buyback Estimator
Grid imports vs. export credits - 7. Deposit vs. Prepaid Comparison
12-month cost & 500/1,000/2,000 kWh - 8. Tier Comparison (500/1k/2k)
EFL benchmark tier cross-check - 9. Commercial Load Factor
Peak kW demand utilization
Texas Electric Bill Calculator
Follow three steps to calculate your exact monthly electric bill, all-in effective rate (¢/kWh), and ±250 kWh seasonal sensitivity.
Estimated Monthly Bill Result
Estimated Monthly Bill: $156.36 (15.64¢/kWh effective all-in rate)
View Detailed Breakdown
TDU Delivery Detail: $4.06 fixed monthly charge + $60.30 volumetric delivery charge (6.0295¢/kWh).
±250 kWh Seasonal Sensitivity: At 750 kWh: $118.28 (15.8¢/kWh) • At 1250 kWh: $194.43 (15.6¢/kWh).
Formula: Total Bill = (kWh × REP Energy ¢/kWh) + REP Base $ + TDU Fixed $ + (kWh × TDU ¢/kWh) + Minimum-Usage Fee $ − Qualifying Bill Credit $.
Switching & Early Termination Fee (ETF) Break-Even Calculator
Test whether switching out of a high-rate electricity contract today saves money after paying your current provider’s flat or per-month-remaining early termination fee.
Switching Break-Even Result
Decision: SWITCH — Net Remaining-Term Impact: +$102.00 net savings
Switching recovers the $150.00 termination fee in 3.6 months and saves $102.00 net over the remaining 6 months.
View Detailed Breakdown
- Current Monthly Bill: $198.00/mo vs. New Plan: $156.00/mo
- Gross Savings Over Remaining Contract: $252.00
- PUCT Rule Note: Under Texas PUCT Substantive Rule §25.475, early termination fees are waived when moving to a new service address.
Bill-Credit Cliff Analyzer
See what happens to a tiered bill-credit plan one kilowatt-hour before the credit threshold (999 kWh vs. 1,000 kWh) and above the credit cap (2,001 kWh), compared side-by-side against a condition-free flat-rate plan.
Bill-Credit Cliff Result
999 vs. 1,000 kWh Cliff Penalty: $99.79 for 1 kWh
Missing the 1,000 kWh threshold by 1 kWh (using 999 kWh instead of 1,000 kWh) raises your bill from $117.31 (11.7¢/kWh) to $217.10 (21.7¢/kWh).
View Detailed Breakdown Across Usage Levels
| Monthly Usage | Bill-Credit Plan Cost | Credit Triggered? | Flat-Rate Plan Cost | Credit Plan vs. Flat Plan |
|---|---|---|---|---|
| 500 kWh | $113.16 (22.6¢/kWh) | No ($0) | $79.21 (15.8¢/kWh) | +$33.95 costlier |
| 750 kWh | $165.23 (22.0¢/kWh) | No ($0) | $116.78 (15.6¢/kWh) | +$48.45 costlier |
| 999 kWh | $217.10 (21.7¢/kWh) | No ($0) | $154.20 (15.4¢/kWh) | +$62.90 costlier |
| 1,000 kWh | $117.31 (11.7¢/kWh) | Yes (-$100) | $154.36 (15.4¢/kWh) | -$37.05 cheaper |
| 1,001 kWh | $117.51 (11.7¢/kWh) | Yes (-$100) | $154.51 (15.4¢/kWh) | -$37.00 cheaper |
| 1,250 kWh | $169.38 (13.6¢/kWh) | Yes (-$100) | $191.93 (15.3¢/kWh) | -$22.55 cheaper |
| 1,500 kWh | $221.45 (14.8¢/kWh) | Yes (-$100) | $229.50 (15.3¢/kWh) | -$8.05 cheaper |
| 1,999 kWh | $325.39 (16.3¢/kWh) | Yes (-$100) | $304.50 (15.2¢/kWh) | +$20.89 costlier |
| 2,000 kWh | $325.60 (16.3¢/kWh) | Yes (-$100) | $304.65 (15.2¢/kWh) | +$20.95 costlier |
| 2,001 kWh | $425.81 (21.3¢/kWh) | No ($0) | $304.80 (15.2¢/kWh) | +$121.01 costlier |
| 2,500 kWh | $529.75 (21.2¢/kWh) | No ($0) | $379.80 (15.2¢/kWh) | +$149.95 costlier |
Free Nights & Weekends Break-Even Analyzer
In Texas, "Free Nights" plans often charge high daytime energy rates (20¢–30¢/kWh vs. ~13¢ flat fixed) and regulated TDU delivery charges (5.7¢–7.8¢/kWh) still apply on every kWh at night. See exactly how much power you must shift to the night window to break even.
Free Nights vs. Fixed-Rate Analysis Result
Verdict: Fixed-Rate Plan is Cheaper
At 30% off-peak usage, your estimated monthly bill is $287.16 (23.9¢/kWh) compared to $174.81 (14.6¢/kWh) on a flat fixed plan. The fixed plan is $112.35 cheaper per month ($1348.20/year).
View Detailed Breakdown & Math
Why Free Nights often costs more: At 24.5¢/kWh for daytime hours, electricity during 6 AM – 9 PM costs nearly 3× more than standard 8.2¢ fixed power. Because regulated TDU delivery charges (4.06/mo + 6.0295¢/kWh) are billed on all kWh day and night on most plans, the "free" night hours only waive the retail energy portion, not the wires delivery.
Appliance Energy & Monthly Cost Calculator
Select a common Texas household appliance preset or enter custom wattage and run hours to calculate daily, monthly, and annual kilowatt-hours (kWh) and dollar cost.
Appliance Operating Cost Result
Estimated Monthly Cost: $137.03/month (945.0 kWh/month)
View Detailed Breakdown
Exact Math: (3,500 Watts × 9 hours/day × 30 days/month) ÷ 1,000 = 945.0 kWh/month. Multiplied by 14.5¢/kWh = $137.03/month.
Texas Household Appliance Wattage & Monthly Electricity Cost Reference (at 14.5¢/kWh)
| Appliance / Load | Typical Running Wattage | Typical Texas Duty Cycle | Estimated Monthly kWh | Estimated Monthly Cost (@ 14.5¢/kWh) |
|---|---|---|---|---|
| Mini Fridge / Dorm Refrigerator (1.7–4.4 cu. ft.) | 60–90 Watts (compressor running; ~25–35W average across 24 hrs) | ~8 hrs/day active compressor run time | 18–25 kWh/mo | $2.61–$3.63/mo |
| Full-Size Refrigerator (18–26 cu. ft.) | 150–220 Watts (compressor running) | ~8 hrs/day active duty cycle | 40–55 kWh/mo | $5.80–$7.98/mo |
| Central Air Conditioner (3.5-Ton Texas Home) | 3,500 Watts | 9 hrs/day in July–August peak cooling | 945 kWh/mo | $137.03/mo |
| Electric Water Heater (Tank, 50 Gal) | 4,500 Watts (heating element active) | 2.5–3 hrs/day recovery cycle | 338–405 kWh/mo | $49.01–$58.73/mo |
| Washing Machine + Electric Clothes Dryer | Washer: 500W • Electric Dryer: 4,500–5,000W | 20 loads/month (~45 min per cycle) | 75–85 kWh/mo combined | $10.88–$12.33/mo |
| Space Heater (Portable 1,500W Resistance) | 1,500 Watts | 6 hrs/day during winter cold snaps | 270 kWh/mo | $39.15/mo |
| Level 2 Home EV Charger (240V / 30A) | 7,200 Watts | ~1.5 hrs/day (~1,000 miles/month driving) | 324 kWh/mo | $46.98/mo |
Solar Buyback Net-Bill Estimator
In ERCOT, regulated TDU delivery charges apply to every kilowatt-hour imported from the grid. Enter your solar production and consumption below to estimate your net monthly electric bill.
Solar Net-Billing Result
Estimated Net Monthly Bill: $99.39/month (Est. Solar Savings: $160.04/mo)
View Detailed Breakdown
Import Energy Charge: $88.26 + TDU Delivery on Imports: $50.34 + REP Base Charge: $9.95 − Applied Export Credit: $49.16.
Deposit vs. Prepaid 12-Month Electricity Cost Calculator
Compare the 12-month cost of paying a refundable security deposit on a standard fixed-rate plan versus enrolling in a higher-rate prepaid electricity plan.
12-Month Deposit vs. Prepaid Result
Annual Energy Savings with Fixed-Rate Plan: $768.00/year
View Detailed Breakdown
12-Month Fixed-Rate Energy Cost: $1608.00 (+ $150.00 refundable deposit returned after 12 on-time payments under PUCT §25.478) vs. 12-Month Prepaid Energy Cost: $2376.00.
Electricity Cost Comparison Across 500, 1,000 & 2,000 kWh Tiers
Enter two plans’ published EFL average rates at 500, 1,000, and 2,000 kWh to compare costs across apartment, average home, and summer peak usage.
EFL 3-Tier Comparison Result
| EFL Usage Benchmark | Flat-Rate Fixed Plan | Bill-Credit Plan | Lower-Cost Plan & Monthly Difference |
|---|---|---|---|
| 500 kWh (Apartment / Low Usage) | $71.00 (14.2¢/kWh) | $99.00 (19.8¢/kWh) | Flat-Rate Fixed Plan saves $28.00/mo |
| 1,000 kWh (PUCT Headline Benchmark) | $135.00 (13.5¢/kWh) | $119.00 (11.9¢/kWh) | Bill-Credit Plan saves $16.00/mo |
| 2,000 kWh (Single-Family Home / Summer) | $262.00 (13.1¢/kWh) | $308.00 (15.4¢/kWh) | Flat-Rate Fixed Plan saves $46.00/mo |
Commercial Load Factor & Demand Analyzer
Commercial electricity quotes in Texas depend on your building’s load factor — the ratio of average power draw to peak 15-minute kilowatt (kW) demand.
Commercial Load Factor Result
Commercial Load Factor: 53.4% (Moderate Load Factor (Standard Commercial))
View Detailed Breakdown
Balanced demand and energy profile. Compare fixed all-in energy rates against demand-pass-through structures.
Formula: Load Factor = Monthly kWh ÷ (Peak kW × Billing Days × 24).
Frequently Asked Questions About Texas Electricity Math
How do I calculate my real Texas electric bill from an Electricity Facts Label (EFL)?
Multiply your monthly kWh usage by the REP Energy Charge (¢/kWh) plus your local TDU delivery charge per kWh, add the TDU monthly base charge and any REP base charge, add any minimum-usage fee if your kWh is below the threshold, and subtract any bill credit only if your monthly kWh falls inside the exact qualifying range.
Why does a plan that advertises 11.9¢/kWh at 1,000 kWh cost nearly 20¢/kWh at 999 kWh?
Many tiered Texas plans apply a $100 to $125 bill credit that triggers strictly at 1,000 kWh. At 999 kWh, you pay the higher underlying energy rate (often 14¢ to 16¢/kWh plus TDU delivery) with zero credit, causing your bill at 999 kWh to be $95 to $110 higher than at 1,000 kWh.
How do I know if paying an early termination fee (ETF) to switch electricity providers is worth it?
Calculate your monthly dollar savings ((current rate − new rate) × monthly kWh), multiply by the months remaining on your contract, and subtract the early termination fee. If net savings are positive and the break-even period is shorter than your remaining contract term, switching now saves money.
How do I calculate the monthly electricity cost of running an appliance in Texas?
Multiply the appliance wattage by hours used per day, divide by 1,000 to get daily kWh, multiply by days used per month, and multiply by your all-in Texas electricity rate (energy + TDU delivery).
Apply These Calculations to Live Texas Plans
Once you know your monthly kWh range and whether a flat-rate or bill-credit structure fits your home, compare live plans or review verified supplier profiles: