Open Electricity Market: what it does to an aircon bill
Switching retailer and cutting what the aircon costs to run sound like the same project. They are two separate levers: one changes the price of a unit of electricity, the other changes how many units get used.
By Team Snowflake | Updated 6 Aug 2026
What opened when the market opened
The Open Electricity Market is the final phase of Singapore's retail electricity liberalisation. Every household can now choose which company it buys electricity from. The market opened in stages by postal zone, starting with a soft launch in Jurong, and the last zone brought coverage to the whole island.
Households and small businesses were the last segment to receive that choice. Larger consumers had already been buying from retailers, so this stage completed the liberalisation rather than starting it. A household now buys in the same market on the same basic terms. The choice arrives with a contract attached, and a contract is a different object from a utility account.
Staying put is a supported outcome rather than an oversight. A household that does nothing keeps buying from SP Group at the regulated tariff. The Energy Market Authority states it plainly: switching to a retailer is not compulsory, and there is no deadline to switch. The default is a position, not a penalty.
What opened was the commercial layer. The choice on offer is who prices the electricity and who issues the bill. The physical arrangement underneath was never part of that choice, and understanding why is what keeps the rest of this page straight.
The confusion worth naming starts right here. A household reading a switching offer is usually already worried about one appliance, and in Singapore that appliance is normally the aircon. The offer answers a narrower question than the one being asked.
Does the electricity supply change when the retailer does?
No. SP Group continues to operate the national power grid and deliver electricity to everyone, whoever sends the bill. The official wording is that the supply stays the same regardless of who the electricity is bought from. Retail choice sits on top of one shared network.
The supporting roles stay where they were as well. Building and maintaining the grid belongs to the grid operator, not to whichever retailer holds the account. Meter reading sits with the market support services licensee, outside the retail relationship entirely. A retailer buys electricity wholesale and resells it. It does not run a private set of cables to the flat.
A retailer leaving the market does not cut anyone off either. Accounts held with an exiting retailer are moved across to SP Group or to another retailer, and the electricity keeps arriving. That is the clearest demonstration of the separation. The commercial party can vanish while the physical service carries on untouched.
So a cooling complaint is never a retailer question. If a room stops getting cold, if the breaker trips when the outdoor unit starts, or if the compressor runs without ever cycling down, no plan on any price list touches that. What arrives at the socket does not vary by contract. Anyone linking the two is describing a coincidence in timing rather than a cause.
Where the meter draws the line
The meter is the boundary between two different worlds, and misplaced complaints usually land on the far side of that line. Everything upstream of the meter is shared network, operated and maintained by one party on behalf of everyone connected to it. Everything downstream is household equipment: the distribution board, the wiring in the walls, and the aircon itself.
A retail contract prices the total the meter records. It does not reach across the meter to the equipment producing that total. The aircon decides the reading. The plan decides what the reading costs. Blaming a retailer for a large reading aims at the wrong side of the boundary, and so does expecting a retailer to shrink one.
Two levers, and a plan choice only reaches one
An electricity bill is a rate applied to a quantity. The rate is what a unit of electricity costs. The quantity is how many units the household drew. Changing retailer moves the first term and leaves the second exactly where it was.
The levers are independent, and that is the whole of the point. A better rate on unchanged usage gives a smaller bill for identical behaviour. Lower usage at an unchanged rate gives a smaller bill too. Neither substitutes for the other, and pulling one does not make the other unnecessary.
Households merge the two because both arrive as the same sentence: the bill went down. The evidence behind each is different. A rate change lands immediately and applies to everything on the account, from the fridge to the kettle. A usage change shows up only where the usage actually shifted.
This is why some households switch, see little improvement, and conclude that nothing works. Their rate did improve. It improved against a quantity that was climbing at the same time, usually because the aircon had started working harder than it used to. One lever moved. The other moved further, the wrong way.
Attribution sits on the statement itself, which is what makes the confusion avoidable. A bill carries a usage figure and a rate separately rather than one blended total. Compare the usage figure against an earlier statement covering the same season, when weather and household routine were closest to matching. If usage held steady and the bill fell, the rate did the work. If usage climbed, the rate change is being asked to cover something else.
| What you change | What it moves | What it cannot reach |
|---|---|---|
| What you changeRetailer or price plan | What it movesThe rate charged on every unit billed | What it cannot reachThe number of units the household draws |
| What you changeSettings and room habits | What it movesHow long the aircon runs to hold comfort | What it cannot reachThe rate that runtime is billed at |
| What you changeCondition of a unit that has drifted | What it movesThe power needed for the same cooling | What it cannot reachAnything on the retail side of the meter |
| What you changeAn old unit swapped for an efficient one | What it movesThe draw per hour of cooling delivered | What it cannot reachThe rate applied to whatever it draws |
Where the consumption side is handled
Cutting electricity consumption on the aircon is a separate page with a separate method. Settings, room habits and unit condition each move runtime, and they are worth working through in order rather than all at once. The guide to reducing an aircon electricity bill sets out that order, along with the trap inside it: treating a unit that has lost condition as a habits problem.
This page stops at the boundary between the two levers. Its job is to keep a retail decision from being mistaken for a cooling decision, not to repeat advice that already lives next door.
Why aircon decides what a rate change is worth
Aircon is normally the largest single load in a Singapore household, which makes it the largest multiplier on any rate difference. A better rate is not a fixed sum handed over at signing. It is a discount applied to whatever was consumed, so the household consuming most gains most from the very same offer.
That produces an uncomfortable symmetry. The household with the most to gain from a better rate is the household with the most consumption sitting there to be reduced. Both levers point at the same appliance. Pull only the rate lever and the larger of the two is left alone.
The same offer is therefore worth very different amounts to two neighbours. A household cooling one bedroom overnight and a household cooling several rooms through the evening are handed an identical rate and collect a different sum from it. Nothing in the offer accounts for that, because the offer never sees the load. It sees only the reading the load produced.
A rate difference is also bounded by what the market is offering at the time. Consumption on a unit that has drifted from its proper condition is bounded by nothing so tidy. That lopsidedness is why the usage side tends to hold more headroom in a cooling-heavy home.
One technical distinction belongs to this decision without belonging to this page. A spec sheet carries two kilowatt figures, one for cooling delivered and one for electricity drawn. Collapsing them into a single figure inflates every cost estimate built on top. The guide to cooling kW versus power kW settles which one belongs in the sum.
A unit whose draw is climbing on its own will mask a rate improvement completely. Fouled coils, a refrigerant charge that has drifted, or a compressor no longer cycling down all stretch runtime for the same comfort. The account then shows a lower rate and a larger bill in the same period. Diagnosing that kind of jump belongs to the separate page on reasons an aircon electricity bill spiked.
Order matters when both levers are on the table. Read the usage side first. It can be checked against the room, while a better rate quietly makes waste cheaper without making it visible. A cheaper unit of electricity is still a unit being wasted.
What a plan commits you to, and what it does not
Standard plans come in two families, and the difference is what the rate is anchored to. A fixed price plan holds one constant rate for the length of the contract. A discount plan is anchored to the prevailing regulated tariff instead, so the underlying rate moves when the tariff moves while the discount holds against it. Both are quoted as all-inclusive rates.
Non-standard plans are the residual family, and the label is doing real work. The published description is that rates may not be all-inclusive, may change during the contract in line with its own terms, and may sit alongside recurring charges or fees. Retailers set the structure themselves. A plan of this kind cannot be judged against a standard one by glancing at a headline rate.
Terms belong to the individual plan, and that is where the reading has to happen. Retailers are required to publish a standardised fact sheet covering the key terms, including whether the contract renews automatically and whether early termination charges apply. Those answers differ between plans and between retailers. Any general claim about them, including one made here, would be wrong for some of them.
The regulated tariff remains the alternative to all of it. A household that would rather not hold a retail contract stays on that tariff, and staying requires nothing. Three related subjects belong elsewhere: how the tariff itself is set, the U-Save rebate, and the carbon tax. Each lands on the same bill without belonging to this decision.
A rate change is worth making, and worth making once. It scales every unit consumed, which is precisely why it is no substitute for the usage side. The two multiply together. A lower rate on a smaller quantity is the only outcome where both levers have been pulled, and only the second one responds to how the aircon is actually running. Which plan suits a household is its own call, made against that plan's own fact sheet.
What is worth reading before comparing
The anchoring question comes first, because it decides who carries the movement. A fixed rate holds still while the regulated tariff moves around it, which suits a household that would rather know its number than beat it. A tariff-referenced discount moves with the tariff, holding a gap rather than a price. Both are defensible positions. They are not the same product, and comparing them as though they were is where the confusion usually begins.
After that, read the fact sheet rather than the headline. It exists because the headline rate is not the whole of an offer, and it collects the terms that decide whether the offer stays what it first looked like. What renews on its own, what is bundled in, and what applies on leaving early are the entries that change the answer. None of that is aircon advice, and none of it is a reason to leave the usage side alone.
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