Your Hydro bill climbs every winter and you don’t know why? It’s almost never a mystery. Here are the real culprits, how to spot them, and what to do to take back control.
In winter, it all comes down to heating
In Quebec, space and water heating often make up more than 50 % of the annual bill. That’s why it “explodes” from December to March: the colder it gets, the harder your systems work. The good news? That’s also where the biggest savings hide.
The real culprits
🔥 Heating
Old baseboards, badly set mechanical thermostats, overheated rooms: the #1 line on your bill.
💧 Hot water
An energy-hungry tank, long showers, an aging water heater: often the second biggest item.
🌬️ Air leaks
Doors, windows, outlets on exterior walls: warm air escapes and your heating compensates non-stop.
🔌 Big appliances
Dryer (240 V), oven, spa, pool: each can weigh heavily, especially when misused.
🌡️ Outdated thermostats
An old thermostat that never lowers at night wastes continuously — one of the most profitable fixes.
💡 Old lighting
Incandescent or halogen bulbs use up to 6-12× more than LED.
How to know what’s eating the most
Before spending, measure. Your Hydro-Québec Customer Space shows your consumption by day and by hour: a spike on very cold mornings and evenings points to heating. A high floor day and night points instead to hot water or an appliance running constantly.
The myths that cost you
Two stubborn beliefs inflate bills. One: “cranking the thermostat higher heats the room faster.” False — a baseboard heats at the same rate; you just risk overheating and forgetting to turn it back down. Two: “it’s not worth lowering at night.” On the contrary: dropping a few degrees at night and when away is one of the most profitable moves of the whole winter.
The small wasters people forget
- The old basement freezer: a 1990s model can cost more than $100 a year on its own.
- The too-hot water heater: 60 °C is enough — hot enough against bacteria, without waste.
- “Phantom” devices: consoles, chargers and electronics on standby draw power 24/7.
- Outdoor lighting left on day and night — a sensor or timer solves it.
Where the money comes back
In order of impact, on electric heating:
- A heat pump — 2 to 3× more efficient, and subsidized (see our heat pump guide).
- Smart thermostats that lower automatically at night and when away.
- Switching to LED and maintaining big appliances.
- Dynamic pricing (Flex D rate) to pay less off-peak.
We find what costs you
CMEQ-certified company holding an RBQ licence. We check your installation, spot the anomalies inflating your bill and recommend the most profitable fixes. Serving Greater Montréal, Laval and the North Shore.
Take back control of your bill
We assess your installation and target the real waste. Free quote.
Your questions about the Hydro bill
Why does my Hydro bill explode in winter?+
Because space and water heating often exceed 50 % of your consumption. The colder it gets, the more these systems run — and the bill follows.
How do I know what uses the most at home?+
Check your Hydro-Québec Customer Space: hourly and daily consumption reveals whether it’s heating (morning/evening peaks) or hot water/an appliance (high floor around the clock).
Can an electrical problem inflate my bill?+
Yes. A bad contact, a faulty heating element or a ground fault can raise consumption. An unexplained jump deserves a check.
What’s the most profitable fix?+
On electric heating, a heat pump (2 to 3× more efficient), then smart thermostats, LED and maintaining big appliances.
Does dynamic pricing really help?+
Yes, if you can shift some consumption out of peak hours. The Flex D rate rewards exactly that shift.
Does lowering the heat at night really save money?+
Yes, it’s one of the most profitable moves. Dropping a few degrees at night and when away clearly reduces the bill, with no real comfort loss.
Does an old basement freezer cost a lot?+
Often yes: an old model can cost more than $100 a year. Replacing it with an Energy Star unit pays off quickly.
What temperature should I set my water heater to?+
Around 60 °C: hot enough to prevent bacteria (Legionella), without heating the water more than necessary.
