Energy choice · the math
Is switching electricity suppliers worth it? Here's the actual math.
Last updated: · Independent — no supplier commissions.
Sites that earn commissions when you switch will tell you switching always makes sense. We don't earn commissions, so we can tell you what the arithmetic says: switching pays in some territories and rarely pays in others — and which one you live in comes down to a single number. Below, that number for every utility we track.
The worth-it line
Switching has real costs even when it's free: reading a contract, tracking when the term ends, and the risk that a variable rollover or hidden fee turns savings negative. So a switch should clear a minimum savings bar — we use $10/month. That gives one formula:
worth-it line = your utility's default rate − (savings bar × 100 ÷ monthly kWh)
At $10/month and a typical 750 kWh: an offer must beat your default rate by 1.33¢/kWh — fixed, full-term, zero fees — or it isn't worth the paperwork. Prefer a different bar? $5/month needs 0.67¢; $20/month needs 2.67¢. The formula is yours.
The worth-it line for every utility we track
Sorted by headroom — the utilities at the top of each table are where offers most often clear the line; the ones at the bottom are where they rarely do. Rates are each utility's verified default supply rate (dated on its page); the line assumes $10/mo savings at 750 kWh.
Pennsylvania (PTC = Price to Compare)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| Duquesne Light | 14.14¢ | 12.81¢ | Most headroom in the state — offers most likely to clear the line |
| Met-Ed (FirstEnergy) | 13.954¢ | 12.62¢ | |
| Penn Power (FirstEnergy) | 13.478¢ | 12.14¢ | |
| Penelec (FirstEnergy) | 13.143¢ | 11.81¢ | |
| PPL Electric Utilities | 13.079¢ | 11.75¢ | |
| West Penn Power (FirstEnergy) | 12.076¢ | 10.74¢ | |
| PECO Energy | 11.759¢ | 10.43¢ | Least headroom — offers rarely go this low |
Compare live offers against these lines on Pennsylvania's official tool — our guide to PA Power Switch →
Ohio (SSO = Standard Service Offer)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| The Illuminating Company (FirstEnergy) | 11.16¢ | 9.83¢ | Most headroom in the state — offers most likely to clear the line |
| Toledo Edison (FirstEnergy) | 11.1¢ | 9.77¢ | |
| AEP Ohio | 10.97¢ | 9.64¢ | |
| Ohio Edison (FirstEnergy) | 10.92¢ | 9.59¢ | |
| AES Ohio | 10.86¢ | 9.53¢ | |
| Duke Energy Ohio | 10.69¢ | 9.36¢ | Least headroom — offers rarely go this low |
Compare live offers against these lines on Ohio's official tool — our guide to Apples to Apples →
New Jersey (BGS = Basic Generation Service)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| PSE&G | 19.0735¢ | 17.74¢ | Most headroom in the state — offers most likely to clear the line |
| Atlantic City Electric | 17.6¢ | 16.27¢ | |
| Jersey Central Power & Light (JCP&L) | 15.2472¢ | 13.91¢ | Least headroom — offers rarely go this low |
Compare live offers against these lines on New Jersey's official tool — our guide to NJ Power Switch →
Maryland (SOS = Standard Offer Service)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| Baltimore Gas & Electric (BGE) | 14.609¢ | 13.28¢ | Most headroom in the state — offers most likely to clear the line |
| Pepco (Maryland) | 13.27¢ | 11.94¢ | |
| Potomac Edison | 12.936¢ | 11.60¢ | |
| Delmarva Power | 12.35¢ | 11.02¢ | Least headroom — offers rarely go this low |
Compare live offers against these lines on Maryland's official tool — our guide to the Maryland OPC shopping guide →
Illinois (PTC = Price to Compare)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| Ameren Illinois | 11.326¢ | 9.99¢ | Most headroom in the state — offers most likely to clear the line |
| ComEd | 10.399¢ | 9.07¢ | Least headroom — offers rarely go this low |
Compare live offers against these lines on Illinois's official tool — our guide to Plug In Illinois →
Washington, D.C. (SOS = Standard Offer Service)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| Pepco (D.C.) | 17.63¢ | 16.30¢ |
Compare live offers against these lines on Washington, D.C.'s official tool — our guide to DC Power Connect →
Delaware (SOS = Standard Offer Service)
| Utility | Default rate | Worth-it line | Verdict |
|---|---|---|---|
| Delmarva Power (Delaware) | 13.69¢ | 12.36¢ |
Methodology note: cross-STATE comparisons of raw rates reflect different wholesale zones (an 18¢ NJ default doesn't mean 8¢ of headroom — NJ offers are priced off the same costlier zone). The worth-it line is meaningful within each utility's own market: it's the number a real offer in YOUR territory must beat.
The two fee traps, converted to ¢/kWh
Supplier offers advertise a rate; the contract adds fees. Convert every fee into ¢/kWh and the "deal" often disappears:
Monthly fees → rate equivalent
| Fee | at 500 kWh | at 750 kWh |
|---|---|---|
| $4.99/mo | +1.00¢/kWh | +0.67¢/kWh |
| $7.99/mo | +1.60¢/kWh | +1.07¢/kWh |
| $9.99/mo | +2.00¢/kWh | +1.33¢/kWh |
A "$4.99 service fee" on a smaller home erases a full cent of advertised advantage — usually the entire spread.
Cancellation fees → monthly equivalent
| ETF | over 12 mo | over 24 mo |
|---|---|---|
| $50 | $4.17/mo | $2.08/mo |
| $100 | $8.33/mo | $4.17/mo |
| $150 | $12.50/mo | $6.25/mo |
If leaving early costs more per month than the offer saves, the fee — not the rate — is the real contract.
The clean test survives all of it: fixed rate, full term, zero monthly fee, zero cancellation fee, below your worth-it line. Anything else, keep the default — it's the rate with a guaranteed exit.
Methodology
- · Default rates: each utility's verified default supply rate (PTC/SSO/BGS/SOS) from commission or utility primary sources, dated on each utility's page. Tables regenerate from the same data — they can't drift from the site.
- · The savings bar: $10/month is our stated assumption for the minimum that justifies contract risk and admin effort; the formula works with any bar you choose.
- · Usage anchor: 750 kWh/month, consistent with the worked examples across this site. Higher usage lowers the ¢/kWh bar; lower usage raises it.
- · What this doesn't include (yet): live supplier-offer counts per territory. The state comparison tools publish current offers; a future version of this page will report how many offers actually clear each utility's line. Until then, the line tells you what to demand.
- · Who we are: we take no supplier commissions and never enroll anyone — which is why we can publish where shopping doesn't pay. How we make money →
Common questions
- Is switching electricity suppliers worth it?
- It depends on one number: your utility's default supply rate. A switch is worth doing only when a FIXED-rate offer (no monthly fee, no cancellation fee) beats your utility's default by enough to matter — we use $10/month at 750 kWh as the bar, which means the offer must be about 1.33¢/kWh below the default. In high-default territories (Duquesne Light in Pittsburgh, Met-Ed in eastern PA) offers regularly clear that bar. In low-default territories (Duke Energy Ohio, AES Ohio) almost none do — shopping there rarely pays, and that's arithmetic, not opinion.
- What is the 'worth-it line' and how is it calculated?
- The worth-it line is the rate a supplier offer must beat for switching to save a meaningful amount: worth-it line = your utility's default rate − (monthly savings threshold × 100 ÷ your monthly kWh). At $10/month and 750 kWh, that's the default minus 1.33¢. Example: PECO's Price to Compare is 11.759¢/kWh, so the worth-it line is about 10.43¢ — an offer at 11.5¢ 'beats PECO' but saves under $2/month, which isn't worth contract risk. Pick your own threshold and usage; the formula is the point.
- Why do low advertised rates still end up costing more?
- Three mechanisms, all arithmetic: (1) Monthly fees — a "$4.99/month service fee" equals +0.67¢/kWh at 750 kWh, which usually erases the advertised advantage. (2) Cancellation fees — a $100 early-termination fee spread over a 12-month term is $8.33/month, more than most realistic savings. (3) Variable rates — a teaser that floats after 3 months can end up far above the default; supply portions doubling after teasers expire is well documented in state complaint records. The clean test: fixed rate, full term, zero fees, below the worth-it line.
- Where does switching electricity suppliers pay off the most?
- The territories with the highest default supply rates, because more offers can undercut them: Duquesne Light (Pittsburgh, 14.14¢ Price to Compare) and Met-Ed (Reading/York, 13.954¢) currently have the most headroom of the utilities we track (verified July 2026). The least: Duke Energy Ohio (10.69¢) and AES Ohio (10.86¢), where the default is already near the competitive floor. Rates reset on each utility's schedule — the tables on this page rebuild from our verified rate data.
- Why does my utility's default rate matter more than the supplier's advertised rate?
- Because the default rate is the price you get for doing nothing — with no contract, no cancellation fee, and the automatic right to return to it. Every supplier offer must be measured against it, net of all fees, for the full term. Suppliers in the same zone buy power in roughly the same wholesale market your utility procures from, which is why the spread between offers and defaults is usually thin — and why territories where the default is unusually high are the only places the spread gets wide.
- Is it worth switching for less than $10 a month?
- That's a personal call — our $10/month bar reflects the real costs of switching: reading a contract, tracking a term end-date, and the risk a variable rollover or fee turns savings negative. Some people happily switch for $5/month; the formula on this page works with any threshold (at $5/month and 750 kWh, the offer needs to be 0.67¢ below your default). What we'd argue against is switching for under $3–4/month — at that spread, one billing quirk erases a year of savings.