Why is my electric bill so high? For Memphis homeowners, the answer usually starts with electricity usage, not the wiring in the walls. A hot summer can push HVAC consumption sharply higher, while electric water heaters, older appliances, lighting, standby power, and changes in MLGW charges can also increase the bill. The first step is to compare your current kWh usage with the same period last year and then identify which systems are responsible for the increase. This guide explains the most common causes, what you can check yourself, and when an electrician or other professional should investigate.
Key Takeaways
- HVAC can be one of the largest contributors to a Memphis home’s summer electricity use, especially during prolonged periods of extreme heat.
- Your MLGW bill reflects both electricity usage and utility charges or adjustments, so compare kWh usage as well as the total dollar amount when a bill suddenly increases.
- Standby power from electronics can contribute to household electricity use, although the impact varies substantially by the number and type of connected devices.
- Electrical problems can sometimes create localized energy losses, but they are less common causes of high household electricity consumption than HVAC, water heating, appliances, and other major loads.
- Replacing frequently used incandescent bulbs with LEDs can reduce lighting consumption substantially, with actual savings depending on bulb wattage, hours of use, and your current electricity rate.
- MLGW bills can include TVA-related adjustments that change over time, so a higher bill does not always mean your home used more electricity.
Did Your Electricity Use Increase or Did Your Rate Increase?
Before changing anything in your home, compare your current bill with the same period last year. Look at kWh used, not just the dollar amount.
| What changed? | What it may indicate |
|---|---|
| kWh increased significantly | Your home used more electricity |
| kWh stayed similar but the bill increased | A rate, adjustment, tax, or other charge may have changed |
| kWh increased during extreme heat | HVAC is a likely contributor |
| kWh increased without an obvious usage change | Investigate appliances, water heating, HVAC, or other major loads |
| Meter reading appears unusual | Verify the reading and billing information with MLGW |
This distinction matters because a higher bill does not automatically mean your home became less efficient. If your kWh usage stayed roughly the same but the total charge increased, investigate the rate and adjustment lines before paying for electrical work.
Why Is My Electric Bill So High? Start With Your kWh Usage
Before diagnosing why your bill is high, you need to know what you’re paying for. Most Memphis homeowners look at the total and stop there. The breakdown tells a different story.
What’s Inside a Typical MLGW Electric Bill
| Charge | What It Is | Can You Reduce It? |
|---|---|---|
| Energy charge | Your actual kWh consumption at the base rate | YES , reduce usage |
| Customer charge | Fixed monthly fee, approximately $13 | NO , flat fee regardless of usage |
| TVA fuel cost adjustment | Varies monthly based on TVA’s fuel costs | NO , utility-controlled |
| Power cost adjustment | Reflects TVA wholesale power price changes | NO , utility-controlled |
| Tennessee sales tax (7%) | Applied to the total bill | NO |
The TVA fuel cost adjustment is the one that surprises people. Memphis Light, Gas and Water sources its power from the Tennessee Valley Authority, and TVA passes fuel cost fluctuations directly to customers through MLGW. When natural gas prices rise nationally, that adjustment line goes up , and your total bill increases even if you didn’t use a single additional kWh. Memphis Light, Gas and Water
If your bill spiked without any change in behavior, check that line item first. If it’s elevated, the cause is outside your home. If it’s normal, the cause is inside.
The 8 Real Causes of a High Electric Bill
Most of these are not electrical problems. A few are. The ones that are electrical tend to be the ones that go undetected the longest , because nothing breaks obviously, the bill just quietly runs higher every month.
Cause 1: HVAC Running Longer Than It Should
In Memphis, air conditioning is not a summer convenience.Memphis summers combine high temperatures with substantial humidity, increasing the workload placed on air-conditioning systems. An AC system that’s slightly undersized, poorly maintained, or working against unsealed duct leaks can run almost continuously during peak heat weeks.
Annual cost impact: There is no single dollar amount that applies to every Memphis home. HVAC electricity use depends on system size and efficiency, thermostat settings, outdoor temperature, duct condition, insulation, and how long the system runs. During prolonged summer heat, an inefficient or poorly maintained system can become one of the largest contributors to a home’s electricity consumption.
What to check: Air filter condition, condenser unit clearance, duct integrity, and thermostat settings. HVAC maintenance is outside an electrician’s scope, but electrical issues contributing to AC inefficiency , such as a circuit that keeps tripping or a panel that can’t handle the load cleanly , are not.
Cause 2: Phantom Loads from Electronics on Standby
Every device that stays plugged in draws power even when it’s “off.” Televisions, gaming consoles, cable boxes, phone chargers, smart speakers, and computers all consume standby power around the clock.
Annual cost impact: The U.S. Department of Energy and the Tennessee Valley Authority both document phantom loads as representing The actual savings depend on how many devices are connected and how much standby power they consume. At MLGW rates Tennessee Valley Authority: Energy Efficiency Resources
What to check: Identify anything that has a clock, a light, or draws a charge while plugged in. Smart power strips that cut phantom draw when the primary device powers off are a straightforward fix. This is not an electrician job , but dedicated circuits for high-draw entertainment systems can reduce the cumulative load impact.
Cause 3: Electric Water Heater Using More Energy
Electric water heaters can be a significant household electricity load, especially when hot-water demand is high or the system is older or malfunctioning. Long showers, frequent laundry and dishwasher cycles, a high thermostat setting, or a water heater that runs more often than expected can all increase consumption.
Annual cost impact: The actual cost depends on the heater’s wattage, operating time, thermostat setting, household size, and MLGW electricity rate. Rather than applying a universal dollar estimate, compare your home’s kWh usage before and after changes in hot-water demand.
What to check: Look for changes in household hot-water use, unusual heater operation, leaks, and thermostat settings. If the water heater is malfunctioning or its electrical circuit has a problem, an appropriate plumbing or electrical professional should diagnose it.For the full cost breakdown and when a licensed electrician is needed for the conversion, see Ace Electric’s LED lighting upgrade guide for Memphis homes.
Cause 4: Electrical Problems or High-Resistance Connections
Electrical problems are possible, but they are not among the most common explanations for a high household electric bill. A damaged connection or other electrical defect can create localized heating and energy loss, but a large increase in household kWh usage should first prompt an investigation of major loads such as HVAC, water heating, appliances, and other equipment.
Older wiring still deserves attention for safety reasons. Aluminum branch-circuit wiring from the late 1960s and early 1970s, deteriorated connections, damaged insulation, or other aging components can require professional evaluation even when they are not responsible for a major increase in electricity consumption.
Annual cost impact: There is no reliable universal savings figure for correcting a wiring problem. The primary reason to repair deteriorated wiring or connections is electrical safety and proper system operation, not a guaranteed reduction in the monthly bill.
What to check: If your home has older wiring, unexplained electrical problems, warm outlets or switches, burning odors, buzzing, flickering, or other abnormal behavior, have a qualified electrician inspect the system. Do not open the panel or attempt to tighten electrical connections yourself.
Cause 5: Outdated Electrical Panel
A 100-amp panel in a modern Memphis home is often running near its capacity limit. Panels running at or above 80 percent of rated capacity generate heat at the breaker connections and run less efficiently than panels with adequate headroom. They also can’t cleanly support newer high-draw additions like EV chargers or additional AC zones without voltage drop.
Annual cost impact: Hard to quantify in isolation, but an overloaded panel contributes to higher consumption on heavy-draw circuits and creates conditions where other inefficiencies compound. The more direct consequence is that an undersized panel constrains the efficiency upgrades that would reduce your bill.
What to check: Whether your panel is 100 or 200 amp, how many circuits are currently active, and whether you’ve added any high-draw equipment since the panel was installed. For full details on what panel upgrades involve and cost locally, see Ace Electric’s electrical panel upgrade guide for Memphis.
Cause 6: Appliances Past Their Efficient Lifespan
Refrigerators, washing machines, water heaters, and dishwashers all become less efficient as they age. Older appliances can use substantially more electricity than newer high-efficiency models, but the difference varies by appliance, model, size, condition, and usage.
Annual cost impact: A refrigerator running 20 years past its efficient lifespan adds $50 to $150 per year in wasted electricity compared to a current model. Older electric water heaters carry a similar penalty.
What to check: Appliance age and Energy Star certification. After that, replacement pays for itself faster than most people expect.
Cause 7: Air Sealing and Insulation Gaps
The Department of Energy recommends improving insulation and air sealing where appropriate, but the right insulation level depends on the home’s construction, existing insulation, climate zone, and project scope.
Annual cost impact: The U.S. Department of Energy estimates that properly sealing and insulating a home reduces heating and cooling costs by 10 to 20 percent. In a Memphis home spending $1,200 per year on HVAC electricity, that’s $120 to $240 in recoverable savings.
What to check: Attic insulation depth, door and window weatherstripping condition, and duct leakage. This is HVAC and weatherization work , not electrical , but it often produces the largest single reduction in an elevated bill.
Cause 8: MLGW Budget Billing Misalignment
If you’re on MLGW’s budget billing program, your monthly payment is based on a rolling average, not your actual usage.A reconciliation or balance adjustment can make the amount due appear unusually high even though the underlying electricity usage occurred over a longer period.
Annual cost impact: None , you pay the same total over 12 months. But the perception of a spike is real when the reconciliation adjustment arrives.
What to check: Whether you’re enrolled in budget billing and whether you’ve received a reconciliation adjustment. If so, your overall consumption is the issue, not a billing error.
What an Electrician Can Actually Fix
Most high-bill causes are not electrical. HVAC maintenance, appliance replacement, and air sealing are the highest-impact fixes and none of them require an electrician.
But these specific causes are electrical , and they stay unresolved until a licensed electrician addresses them:
Electrician vs Non-Electrician Fixes
| Issue | Who should evaluate it? | Primary reason to address it |
|---|---|---|
| Loose/damaged electrical connection | Licensed electrician | Safety and proper operation |
| Aging or damaged panel | Licensed electrician | Safety and capacity |
| Aluminum wiring concerns | Licensed electrician | Connection safety and condition |
| Incandescent lighting | Homeowner or electrician | Reduce lighting energy use |
| Circuit overload concerns | Licensed electrician | Safety and capacity |
| HVAC inefficiency | HVAC technician | Reduce HVAC energy consumption |
| Aging appliance | Homeowner/appliance professional | Improve appliance efficiency |
| Air sealing/insulation | Weatherization contractor | Reduce HVAC demand |
| Phantom loads | Homeowner | Reduce standby consumption |
The electrical fixes are not the biggest-dollar items on your bill , HVAC is, by a large margin. But they are the ones that a homeowner can’t resolve themselves, and the ones most likely to go unaddressed for years because nothing obviously breaks.
Memphis Summer Bills: What Should You Compare?
Memphis summer electricity use can rise substantially because air conditioning operates more frequently during prolonged heat and humidity. But there is no single “normal” electric bill for a 2,000-square-foot home. Two houses of the same size can have very different electricity consumption because of insulation, HVAC efficiency, thermostat settings, water heating, occupancy, appliances, pools, EV charging, and other loads.
Instead of comparing your bill with a fixed dollar benchmark, compare these numbers:
- Current kWh usage
- Same-month kWh usage from the previous year
- Number of billing days
- Current electricity charges
- MLGW adjustment and other applicable charges
A large increase in kWh points toward higher household consumption. A similar kWh total with a significantly higher bill points toward changes in rates, adjustments, taxes, or other charges.
Quick Wins vs Bigger Projects
Some fixes take 15 minutes. Others take a contractor and a week. Here’s how to prioritize.
Bill Reduction by Time and Cost Required
| Fix | Time | Typical Cost | Potential Impact |
|---|---|---|---|
| Unplug unnecessary devices | 15 min | $0 | Low to moderate |
| Smart power strips | 1 hour | $20–$60 | Low to moderate |
| Replace incandescent bulbs with LEDs | 1–2 hours | $40–$80+ | Moderate |
| Replace HVAC filter | 10 min | $10–$25 | Helps maintain airflow |
| Review thermostat settings | 5 min | $0 | Moderate |
| Electrical inspection | 2–4 hours | Varies locally | Identifies electrical problems |
| Panel evaluation | Varies | Varies | Safety/capacity |
| Air sealing/insulation | 1–3 days | Varies | Potentially significant HVAC savings |
| HVAC evaluation | Varies | Varies | Potentially significant |
Start with the top four. They cost almost nothing and typically produce $150 to $400 in annual bill reduction. Then assess whether the bigger projects make sense for your situation.
Frequently Asked Questions
Why did my MLGW bill spike this month with no change in behavior?
Check both your kWh usage and the adjustment/rate lines on the bill. If your kWh stayed similar but the total increased, a rate or utility adjustment may be responsible. If kWh increased substantially, investigate what changed in the home’s electricity use.
How much of my Memphis electric bill is from air conditioning?
Air conditioning can represent a substantial share of electricity consumption during Memphis’s hottest months, but the percentage varies by home, HVAC system, weather, insulation, thermostat settings, and other electrical loads.
Can faulty wiring cause a high electric bill?
Yes, though the contribution is gradual rather than dramatic. Loose connections, high-resistance aluminum wiring, and degraded insulation all cause energy to be lost as heat rather than delivered usefully. Faulty wiring can create localized heat and energy loss, but it is not one of the first things to assume when a household bill increases. HVAC, water heating, appliances, and other major loads should be investigated first. Electrical problems should be evaluated primarily because of their safety implications.
What is the cheapest fix for a high electric bill?
Replacing frequently used incandescent bulbs with LEDs is usually one of the simplest low-cost ways to reduce lighting consumption. The actual savings depend on the bulbs’ wattages, hours of use, number of bulbs, and your current electricity rate.
Should I get a home energy audit in Memphis?
Yes, if your bill has been elevated for more than one billing season without an obvious explanation. A professional home energy assessment can help identify HVAC, insulation, air leakage, and other efficiency issues. A licensed electrician is appropriate when the assessment or your symptoms point to electrical problems such as damaged wiring, abnormal connections, panel issues, or circuit concerns.
At what point should I call a licensed electrician about my electric bill?
If you’ve addressed obvious usage changes and your kWh consumption remains unexpectedly high, an electrician can inspect the electrical system for problems involving wiring, connections, circuits, lighting, or the panel. If HVAC or building-envelope problems are more likely, an HVAC professional or energy auditor may be the better first call.
Final Word
Most high electric bills in Memphis come down to a short list: an AC system working harder than it should in 100-degree heat, lighting and appliances that haven’t been updated, phantom loads running quietly around the clock, and in some cases, and, less commonly, electrical problems that affect safe and proper system operation.
Start with the free fixes. Then the low-cost ones. If the bill is still elevated, a licensed electrical inspection is the right next step , it rules out the causes no homeowner can see from the outside, and it can help identify problems that are difficult to diagnose from the bill alone.
For Memphis homeowners who want an electrician to assess the electrical side of their bill specifically , wiring, panel load, lighting efficiency, and circuit conditions , Ace Electric provides residential electrical inspections and upgrades across Shelby County.
Ace Electric Memphis | Germantown | Bartlett | Collierville | Cordova | Millington Licensed, insured, and locally operated.