Why My December Electric Bill Was $387: 4 Mistakes, 1 Renter Fix

Why My December Electric Bill Was $387: 4 Mistakes, 1 Renter Fix That Cut It to $273

My December electric bill was $387. I knew it would be high because December is when it is high every year, but $387 was $90 more than the previous December in the same apartment with the same appliances. I had not bought anything new. I had not changed my routine. I called the utility to ask what happened, and the customer service rep walked through the line items with me, and what I learned from that call is what I want to share, because most of the $387 was not the bill I thought I was paying.

That is the line I want to walk you through, and I will show you the four line items that added up to the $387, what each one was really for, and the one change I made the next month that brought the same apartment's January bill down to $273. The change was not a smart thermostat. The change was not new insulation. The change was a single number on the bill I had been ignoring for three years, which is the number that explained every other number on the page.

The Headline Price and What It Doesn't Include

The headline on my bill said $387. The breakdown underneath said I used 1,142 kWh at a rate of $0.31 per kWh, which is $354 in supply charges, plus $33 in delivery and distribution. The $33 in delivery is a flat-ish fee that the utility charges regardless of how much I use, and it does not change much month to month. The $354 in supply is what moves, and $354 divided by $0.31 per kWh gives 1,142 kWh, which is the number the utility actually used to bill me.

What the headline does not include is the supply rate itself. My $0.31 per kWh was the rate for the default supply option, which is the option the utility puts you on if you do nothing. The default rate changes quarterly, and the rate I was billed at in December was the highest default rate the utility had charged in two years, because wholesale electricity prices in my region had spiked in October and the default rate is a lagging indicator that catches up two to three months later. The 1,142 kWh I actually used was within 4 percent of the 1,098 kWh I used the previous December, which means the $90 increase was not my usage. It was the rate.

The third number the headline does not include is the supply rate your utility offers if you opt out of the default and choose a competitive supplier. In my state, the list of competitive suppliers was 14 options, and the cheapest one was $0.21 per kWh for a 12-month fixed contract. The default rate was $0.31. At my usage of 1,142 kWh per month, that rate difference saves $114.20 per month, or about $1,370 per year. I had not done this in three years. The bill had been doing what the bill does when nobody reads it.

Parts of the Bill: What They Cost and Where They Hide

The line items on a residential electric bill usually fall into four buckets, and the buckets are not always labeled. The first is the supply charge, which is what you pay the company that generated the electricity. The second is the delivery charge, which is what you pay the utility that owns the wires. The third is the distribution charge, which is the wires charge minus the part that goes to the utility's profit. The fourth is the miscellaneous charge, which is a grab bag of fees, taxes, and rider adjustments that change based on regulatory decisions you did not vote on.

The supply charge is the only one you can change on the electric bill itself. The delivery, distribution, and miscellaneous charges are regulated and you pay whatever the regulator approved. The supply charge is competitive in most states, which means you can shop it, but most renters do not shop it because the bill presents supply as if it were the same as the other charges. The $0.31 per kWh my bill charged for supply looked like a fixed number the way the $33 delivery fee looked like a fixed number, and the two numbers are not the same kind of number. One of them is a market rate you can change. The other is a regulated rate you cannot.

What hides in the supply charge is the rate itself, the contract term, and the early termination fee. The rate is the easy part. The contract term matters because a 12-month fixed locks the rate for a year, which is what you want when rates are high and what you do not want when rates are low. The early termination fee matters because some suppliers charge $50 to $150 if you leave before the term ends, which means shopping for a lower rate is not free if you are in the middle of a contract. The bill does not show any of this. The bill shows the current month's number. The other numbers live in the fine print of the contract you signed when you opted in, or the contract you were automatically enrolled in if you did not opt in.

Labor: When It Is Worth Paying For (and When It Is Not)

The bill is not the only cost of high electricity use. The cost of the time you spend figuring out which supplier is cheapest is a real cost, and the cost of being wrong is also a real cost. The way to make the time worth it is to treat the supplier switch the way you would treat any other renter decision: do the math once, do not re-do the math every month, and accept that the savings are real even if they are not dramatic.

For my own December bill, the time cost of switching was about 90 minutes. I spent 30 minutes comparing the 14 competitive suppliers on my state's apples-to-apples website. I spent 20 minutes reading the contract fine print for the cheapest option. I spent 20 minutes calling the utility to verify the switch would not interrupt service. I spent 20 minutes enrolling online. The savings on the first month's bill were $114.20, which means my effective hourly rate for that 90 minutes of work was $76 per hour. The next month's savings were also $114.20, and the month after, and so on for 12 months.

The case where the labor is not worth it is when you are moving within three months, because the contract term will outlast your stay and the early termination fee will eat most of the savings. The other case is when the cheapest supplier in your state is within 5 percent of the default rate, because the difference is not worth the time. In my state, the cheapest option was 32 percent below the default rate, which made the time well spent. In other states, the spread is smaller, and the decision is closer.

The Three Costs Nobody Mentions

The first hidden cost is the default rate, which I have already covered. The second hidden cost is the demand charge, which is a fee some utilities add for the highest single hour of use in the month. It is mostly relevant for commercial customers, but it can show up on residential bills if you have a heat pump, an EV charger, or a hot tub. The third hidden cost is the seasonality adjustment, which is a multiplier some utilities apply in winter and summer when grid demand is highest.

Demand charges show up on your bill as a separate line item, and they are usually small for residential customers. But if you have an EV and you charge it between 4 PM and 9 PM on a weekday, your demand charge can be a real number. The way to reduce it is to charge the car overnight, when grid demand is lowest and some utilities offer lower rates. If your utility has a time-of-use rate option, switching to it can cut the demand charge and the supply charge at the same time.

Seasonality adjustments are the hardest to control because they are based on when you use power, not how much. If your December usage is 1,142 kWh and your June usage is 720 kWh, your December bill will be higher even if your per-kWh rate is the same, because the seasonality multiplier is higher in December. The way to reduce seasonality impact is to shift as much electric use as possible away from December, which means using gas for cooking and heating if you have it, or using a heat pump set to a lower temperature and wearing a sweater, or running the dishwasher overnight when the multiplier is lower.

DIY vs Pro: A Real Comparison for the Renter Who Is Moving in Three Months

If you are a renter who plans to stay in the apartment for less than 12 months, the math on the supplier switch changes. A 12-month fixed contract that you break in month 4 with a $100 early termination fee will save you $356.80 over those 4 months (4 x $114.20 minus $100 fee) and cost you the time of switching. The savings are still positive, but the per-month savings drop from $114.20 to $89.20, and the effective hourly rate for the 90 minutes of work drops from $76 per hour to $59 per hour. The decision is still worth it, but the case is less dramatic.

If you are a renter who plans to stay for more than 12 months, the math improves every month you stay past the contract term. A renter who stays 24 months on the same fixed contract will save $2,740.80 over two years (24 x $114.20), which is more than a month's rent in most cities. The labor cost of switching does not increase with time, which means the longer you stay, the better the return on the 90 minutes of work. The case for switching is strongest for the renter who is settling into a long-term place and weakest for the renter who is packing boxes.

The comparison to a professional service, like a bill-auditing company that promises to find savings for a percentage of what they save, is not favorable for the renter. The bill-auditing companies charge 25 to 50 percent of the first year's savings, which means a $1,370 first-year savings becomes $685 to $1,027 after the fee, and you still did the work of switching, which the company does not do. The 90 minutes of DIY work in this case is worth more than the DIY-plus-auditor approach, because the savings are not hard to find. They are on the bill.

When It Makes More Sense to Move Than to Optimize

The break-even point on the supplier switch is one month. If you switch and the next month's bill is the same, something is wrong, and you should call the utility to ask. The break-even point on a thermostat, insulation, or any hardware investment is much longer, because the hardware costs money and the savings are gradual. A $200 smart thermostat that saves $20 per month on the bill takes 10 months to pay back. A $600 insulation job in a rental is not something the renter should pay for, because the renter does not own the building. The renter's break-even math is much tighter, and most hardware investments do not pass the test for a renter.

The case where it makes more sense to move than to optimize is when the apartment is structurally inefficient, which is to say when the windows are single-pane, the insulation is post-1960 and falling out, and the heating system is resistive electric baseboard. In an apartment like that, the supplier switch might save you $1,370 per year, but the structural inefficiency is costing you $2,000 per year in heat that is leaving through the walls. The supplier switch does not address the structural problem. Moving to a better-insulated apartment with a heat pump might cost you $200 more per month in rent, but the electricity savings could be $150 per month, which means the net is $50 per month more for a much better living environment.

The decision framework is: if your December bill is more than 8 percent of your monthly rent, the apartment is inefficient enough that the supplier switch is treating the symptom and not the cause. If your December bill is less than 4 percent of your monthly rent, the apartment is well-insulated and the supplier switch is the highest-return action you can take. If you are in the 4 to 8 percent middle, both actions are worth doing, and the order depends on whether you are staying more or less than 12 months. The $387 was 22 percent of my rent, which put me in the treat-the-symptom-and-the-cause zone.

What to Do This Week

The first action is to find the supply rate on your most recent bill. It is usually on the second or third page, in a section labeled supplier charges, generation charges, or energy charges. The number you are looking for is the per-kWh rate, not the dollar total. If the rate is above $0.25 per kWh in a state with competitive supply, you are probably on a default rate that can be lowered. If you do not have a recent bill, the utility's website will show your current rate and your usage history for the last 12 months.

The second action is to visit your state's apples-to-apples electricity comparison website, which every state with retail energy choice has, and to enter your usage. The site will show you the cheapest fixed-rate option for your usage profile. The cheapest option is not always the best option, because the contract terms vary, but the cheapest option is the floor of what you can achieve. Read the contract fine print for early termination fees and rate changes at renewal before you sign.

The third action is to call your utility to ask two questions. The first is whether switching suppliers will interrupt your service. The answer is almost always no, because the utility still delivers the power, but the answer is worth knowing. The second is whether the utility offers a time-of-use rate option, which is a different lever than the supplier switch and which can stack with the supplier switch. If your utility offers time-of-use and your usage is high in the evening, the time-of-use option can save you another $20 to $40 per month on top of the supplier switch.

The fourth action is to set a calendar reminder for 11 months from now, which is one month before the fixed contract expires. The reminder is to revisit the supplier market, because the cheapest supplier in month 1 is not the cheapest in month 12, and the savings come from re-shopping every year. The renter who shops once and locks for life leaves money on the table. The renter who shops every year captures the savings every year. The 90 minutes of work is the same either way. The difference is whether you do it once or 12 times.