Solar Answers → Bills & Net Metering
What is ComEd's new electricity rate for October 2026?
ComEd's Price to Compare is 10.103¢ per kWh from October 1, 2026 through May 2027, replacing this summer's 10.399¢. That's about 3% lower than the summer price but about 4% higher than last October's 9.689¢. The Citizens Utility Board reports ComEd confirmed the figure ahead of the change. It covers the supply part of your bill only; delivery charges, taxes and fees are billed separately. And it stays elevated for a reason: regional capacity costs are locked at the auction cap through May 2029.
Independent public sources we cite and link — The Day Company is not affiliated with or endorsed by any of them.
What is ComEd's Price to Compare from October 1, 2026?
10.103¢ per kWh, from October 1, 2026 through May 2027. The Citizens Utility Board reports ComEd confirmed the figure ahead of the change. It replaces the summer price of 10.399¢, which ran June 1 through September 30, 2026. The Price to Compare is the supply and transmission part of your bill — the number any alternative supplier's offer has to beat.
Swipe the table sideways to see every column →
| Period | Dates | Price to Compare | Source |
|---|---|---|---|
| Non-summer | Oct 1, 2025 – May 31, 2026 | 9.689¢/kWh listed at 9.66¢ by January 2026 | Citizens Utility Board |
| Summer | Jun 1 – Sep 30, 2026 | 10.399¢/kWh 8.677¢ supply + 1.722¢ transmission | Plug In Illinois (ICC) |
| Non-summer (new) | Oct 1, 2026 – May 31, 2027 | 10.103¢/kWh | Citizens Utility Board, reporting ComEd's confirmation |
The Illinois Commerce Commission's Plug In Illinois hadn't posted the supply-and-transmission split of the October price as of September 28, 2026. We add it the day it appears.
How much will the October change save you?
Not much, on the price alone. At 750 kWh a month, the supply part of the bill goes from about $77.99 at the summer price to $75.77 at the new one — $2.22 less. Against last October's price, the same usage now costs $3.10 more. What lowers most October bills is lower usage: the air conditioning stops.
The price that resets on October 1 is only the supply part of the bill. Delivery charges, taxes and fixed fees are billed separately and don't follow the Price to Compare. The full breakdown is on why is my ComEd bill so high?, and what a typical bill runs is on the average electric bill in Illinois.
What does the new price mean for your supply cost?
Set your monthly usage — it's printed on your bill in kWh — and compare the supply portion at three prices: the new October price, this summer's and last October's. Supply and transmission only; the rest of the bill doesn't move with the Price to Compare.
Your supply cost at three prices
Price to Compare × your monthly kWh. Excludes delivery, taxes, fees and the monthly Purchased Electricity Adjustment.
That's $2.22 a month less than at the summer price, and $3.10 a month more than last October.
Illustrative arithmetic on published prices, not a bill estimate. The monthly adjustment can move the real figure up or down. Know your kWh? It's also the number that sizes a solar system: how many solar panels you need.
The price resets twice a year. Your roof doesn't. The free check looks at your roof, your usage and your utility together, and says so if solar isn't a fit.
Check my home's fit →What will your first October bill show?
Two supply lines at the new price, plus a monthly adjustment. The Price to Compare appears on your bill as an Electricity Supply Charge and a Transmission Services Charge, which add up to 10.103¢ per kWh from October 1. A third line, the Purchased Electricity Adjustment (PEA), can be a charge or a credit, and it changes every month.
The PEA is ComEd's true-up between what customers paid at the Price to Compare and what the power actually cost. The Commission's Plug In Illinois site explains it's calculated monthly, so the effective price moves from month to month, and the Commission expects the adjustments to average near zero over a planning year. We don't publish a month's PEA until an official source does; past values are in Plug In Illinois' historical price files, linked in our sources.
Will ComEd's price change again before June?
Possibly, slightly, in January. Last winter's non-summer price opened at 9.689¢ on October 1, 2025 and was listed at 9.66¢ by January 2026. The transmission part of the price is scheduled to change again in January 2027. The next seasonal reset is June 1, 2027, when the summer price takes over.
If January brings a new figure, it goes here the day it's published, with the date and the source.
Why do some sites say ComEd resets on December 1?
Because they have Illinois wrong. Some national rate-comparison sites still publish a June 1 and December 1 schedule for ComEd — at least one still did in late September 2026. ComEd's filed tariff treats June through September as summer, so the fall change comes October 1.
"The Summer PECs are applicable in the months of June, July, August, and September."
ComEd Purchased Electricity Charges informational sheet, a supplement to Rate BES and Rider PE filed with the Illinois Commerce CommissionThe error moves money. The Price to Compare is the number an alternative supplier's offer must beat, and comparing against a stale one is how bad contracts get signed. If a salesperson tells you the summer price holds until December, ask them to show you where the state says so. Offers that bundle a battery with a supply contract are a common version of that pitch: what those contracts actually say.
Why is ComEd's price still this high?
Capacity costs. PJM, the regional grid operator ComEd buys through, pays generators to be available at peak demand, and its last three auctions all cleared at the FERC-approved cap: $329.17 per megawatt-day for 2026/2027, $333.44 for 2027/2028 and $325.00 for 2028/2029. That last delivery year runs through May 31, 2029.
For scale: the 2026/2027 result was about 22% above the prior year and roughly eleven times the 2024/2025 price. The most recent auction, announced July 14, 2026, came in about 2.5% below the year before it — the first step down in the series — but still hit the cap and still cleared roughly 6,800 MW short of PJM's reliability requirement. The 2027/2028 auction fell short too, by 6,623 MW.
So October's small dip isn't a turn in the trend. ComEd passes the cost of supply through without a markup — its earnings come from delivery — so the Price to Compare follows procurement and auction results, and those are locked at the cap for three consecutive delivery years. Everything ComEd-specific, from rates to net metering, is in the ComEd solar guide.
Why does ComEd's price reset twice a year?
Because default supply is bought on a seasonal schedule. The power used by customers who haven't chosen an alternative supplier is procured under the Illinois Power Agency's plan and priced separately for summer (June through September) and non-summer (October through May). Summer power costs more to secure, so the two seasons carry different prices.
What is Ameren Illinois' price from October 2026?
Ameren's price drops on October 1 too, and it splits into two tiers. The Citizens Utility Board reports Ameren's price is 10.441¢ per kWh for the first 800 kWh a month and 8.262¢ beyond that, October 2026 through May 2027, replacing a flat 11.326¢ this summer. Ameren sits in a different regional grid market, so its price follows its own drivers.
The full Ameren breakdown — supply, delivery and why bills climbed — is on why is my Ameren bill so high?
Will your winter bills actually be lower?
A little on price, often more on usage. The new non-summer price is 10.103¢, below the summer's 10.399¢ but above last winter's 9.689¢. In a gas-heated home, lower winter usage does most of the work; in an all-electric home or one with a heat pump, higher winter usage can still produce a bigger bill.
A bill is price times usage, so check which one moved before you blame the rate. If you're weighing solar, winter is also when panels produce the least: how Illinois solar performs month by month.
Can you get out from under the reset cycle?
Not while you buy default supply from ComEd — the Price to Compare is set by procurement, not by you. You have three real levers: shop an alternative supplier, which carries its own risks; switch to one of ComEd's other supply options; or produce some of your own power.
ComEd's other supply options price power differently, not cheaper by definition. Hourly Pricing follows wholesale prices hour by hour — how Hourly Pricing works with solar — and ComEd's time-of-day rate charges more at peak and less off-peak.
Producing your own power doesn't freeze the Price to Compare; it cuts how many kilowatt-hours you buy at whatever that price becomes. Systems interconnected on or after January 1, 2025 get supply-only net metering credits, so the delivery portion of the bill remains — what your bill looks like after solar. The federal homeowner credit ended for purchases after December 31, 2025: did the solar tax credit end? Whether it pencils out depends on your roof and your usage: is solar worth it in Illinois?
Two things to know before you sign anything. Solar with $0 upfront, through a lease or a solar power agreement (PPA), sets what you pay for the solar power for the length of the agreement: flat, or with a set yearly increase, depending on the program. Compare that price and the term with what you'd pay ComEd: lease vs. PPA vs. buying in Illinois. And adding a battery for ComEd's $300/kWh storage rebate comes with a qualifying-rate requirement and a five-year virtual-power-plant term: the ComEd battery storage rebate. Whatever you're offered, here's how to vet the quote.
If you want to know whether your home is even a candidate, the eligibility check is free — not a quote, not a savings promise, and it tells you no when the answer is no.
ComEd October 2026 rate FAQ
What is ComEd's Price to Compare for October 2026?
10.103¢ per kWh, from October 1, 2026 through May 2027. The Citizens Utility Board reports ComEd confirmed the figure ahead of the change. It replaces the summer price of 10.399¢ and covers supply and transmission only, not delivery, taxes or fees.
When does ComEd's electricity rate change in fall 2026?
October 1, 2026. ComEd's filed tariff treats June, July, August and September as summer, so the summer Price to Compare ends September 30 and the non-summer price applies from October 1 through May 31, 2027.
Is ComEd's October 2026 rate higher than last year?
Yes, by about 4%. The non-summer price that started October 1, 2025 was 9.689¢ per kWh; the one starting October 1, 2026 is 10.103¢. It's about 3% below this summer's 10.399¢.
How much will my ComEd bill change in October?
On price alone, very little. At 750 kWh a month, the supply portion is about $2.22 lower than at the summer price and about $3.10 higher than last October. Most of an October drop comes from lower usage once air conditioning stops. Delivery, taxes and fees are billed separately.
What is the Purchased Electricity Adjustment on my ComEd bill?
A monthly charge or credit that trues up what customers paid at the Price to Compare against what ComEd's power actually cost. It's calculated each month, so the effective price moves month to month, and the Illinois Commerce Commission expects it to average near zero over a planning year.
Will ComEd's price change again in January 2027?
Possibly, slightly. The transmission part of the price is scheduled to change in January 2027, and last winter the price moved from 9.689¢ in October to 9.66¢ by January. The next seasonal reset is June 1, 2027.
Isn't ComEd's reset June 1 and December 1?
No. Some national rate-comparison sites still publish a December 1 date for ComEd, and it is wrong. The Illinois Commerce Commission's own electric-choice site and ComEd's filed tariff both put the fall change at October 1.
Why does ComEd's rate reset twice a year?
Because default supply is procured seasonally under the Illinois Power Agency's plan and priced separately for summer (June through September) and non-summer (October through May). Summer power costs more to secure, so the two seasons carry different prices.
Why is ComEd's supply price still high?
Capacity costs. PJM's auctions, which pay generators to be available at peak, have cleared at the FERC-approved cap three years running — $329.17 per megawatt-day for 2026/2027, $333.44 for 2027/2028 and $325.00 for 2028/2029, a delivery year that runs through May 31, 2029.
What is Ameren Illinois' price from October 2026?
10.441¢ per kWh for the first 800 kWh a month and 8.262¢ beyond that, October 2026 through May 2027, per the Citizens Utility Board. It replaces a flat 11.326¢ this summer.
Will the winter rate be cheaper than the summer rate?
Slightly, on price: 10.103¢ from October versus 10.399¢ this summer. But it's above last winter's 9.689¢, and a home that uses more power in winter, with electric heat or a heat pump, can still see a bigger bill.
Does ComEd profit when the supply price goes up?
No. ComEd passes the cost of electricity supply through to customers without a markup; its earnings come from delivery service. That is why the Price to Compare moves with procurement and auction results rather than with ComEd's own margins.
Can I avoid ComEd's rate resets?
Not on default supply. You can shop an alternative supplier, switch to ComEd's Hourly Pricing or its time-of-day rate, or produce some of your own power with solar, which cuts how many kilowatt-hours you buy at whatever the price becomes. Each has trade-offs worth checking before you sign.
Does solar lock in my electricity rate?
Partly. Solar doesn't freeze ComEd's Price to Compare, but it cuts how many kilowatt-hours you buy at that price, and with a lease or solar power agreement (PPA), what you pay for the solar power is set in the agreement for its term. Systems interconnected on or after January 1, 2025 receive supply-only net metering credits in Illinois, so the delivery portion of your bill remains.
Does the federal solar tax credit still cover 30%?
Not for a homeowner buying their own system. The federal residential credit ended for expenditures after December 31, 2025. A separate business-side credit runs on its own timeline — projects that began construction before July 4, 2026 generally have a longer runway, while newer starts must be in service by December 31, 2027 under stricter sourcing rules. Ask any company in writing whether the specific offer in front of you still qualifies.
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Sources
- Plug In Illinois — ComEd Price to Compare (Illinois Commerce Commission; checked September 28, 2026 — the summer figure and its components, how the monthly adjustment works, and the historical price files; the October split had not been posted)
- Citizens Utility Board — Electric rates (viewed September 28, 2026 — ComEd's confirmed October 2026–May 2027 price and Ameren's two-tier price)
- Citizens Utility Board — Making Sense of Your Electric Bill (PDF) (January 2026 fact sheet — ComEd's 9.66¢ price)
- ComEd — Purchased Electricity Charges Informational Sheet (PDF) (supplement to Rate BES and Rider PE, Ill. C.C. No. 10 — the summer-month definition)
- Citizens Utility Board — summer 2026 price alert (May 21, 2026)
- Citizens Utility Board — why the ComEd price is rising (June 10, 2026)
- Citizens Utility Board — non-summer price announcement (October 1, 2025 — the 9.689¢ figure)
- PJM Interconnection — 2026/2027 Base Residual Auction results (July 22, 2025)
- PJM Interconnection — 2027/2028 Base Residual Auction results (announced December 17, 2025)
- PJM Interconnection — 2028/2029 Base Residual Auction results (announced July 14, 2026)
Changelog: July 30, 2026 — v1 published; v2 added PJM's 2028/2029 capacity auction result and extended the capacity-cost horizon to May 2029. September 28, 2026 — published ComEd's confirmed October 2026–May 2027 price of 10.103¢ and what it means for a bill; added a supply-cost calculator, what the first October bill shows, the January adjustment and Ameren's new two-tier price; linked the related guides.
How to cite: The Day Company Editorial Team, "What is ComEd's new electricity rate for October 2026?," The Day Company, updated September 28, 2026. https://theday.company/answers/comed-rate-reset-october-2026