Hot Tub Electricity Cost in Ontario, Plus Pool Pump and Heater Costs

The typical hot tub electricity cost in Ontario is about $250–$500 a year for an outdoor tub, and a backyard pool's pump costs roughly $200–$350 a season with an older single-speed pump, before any heating. Heating a pool can add several hundred dollars more each season. These are estimates; the biggest factors are cover quality, water temperature, pump type and when the equipment runs.

This guide breaks down where the energy goes, gives worked cost estimates and lists the changes that make the biggest difference.

Hot tub electricity cost in Ontario: how much does one cost to run?

A hot tub's energy goes to three things: keeping the water hot, running the circulation pump, and running jets and blowers when in use. In Ontario, winter is the expensive season because the tub loses heat to cold air, snow and wind.

Estimates use an illustrative all-in electricity cost of 15¢/kWh after the Ontario Electricity Rebate.

Hot tub scenario	Annual electricity (estimate)	Approx. annual cost
Well-insulated tub, good cover, used year-round	1,700–2,500 kWh	$255–$375
Older tub or worn cover, used year-round	3,000–4,500 kWh	$450–$675
Seasonal use (May–October), drained in winter	800–1,300 kWh	$120–$195
Indoor or sheltered tub, good cover	1,200–2,000 kWh	$180–$300

The cover is the most important component. A waterlogged or damaged cover can increase heat loss dramatically; foam covers absorb water over time, get heavier and lose insulating value. If your cover is heavy, cracked or sagging, replacing it is often the best-value fix.

Hot tub savings checklist

1. Keep the cover on and strapped down whenever the tub is not in use.
2. Replace a waterlogged cover (typically every 5–7 years).
3. Lower the set temperature by 1–2 °C, or use an economy mode, during weeks you do not use it.
4. Add a floating thermal blanket under the cover.
5. Shelter the tub from wind with a fence, screen or landscaping.
6. Schedule filtration cycles for off-peak or ultra-low overnight hours if your control panel allows.
7. Check the cabinet insulation and seal gaps around the base.

How much does a pool pump cost to run?

Pool pumps circulate and filter water for many hours a day, so pump type and run time matter more than anything else.

Pump type	Typical draw	Hours/day	Season (120 days) kWh	Approx. season cost
Single-speed 1.5 hp	1.5–2 kW	8	1,440–1,920	$215–$290
Single-speed 1.5 hp	1.5–2 kW	10	1,800–2,400	$270–$360
Variable-speed at low speed	0.3–0.6 kW	12	430–860	$65–$130

All figures are estimates. Variable-speed pumps save energy because a pump's power use falls very steeply as speed drops; running longer at low speed uses much less energy than running briefly at full speed. Savings of 50–80% compared with a single-speed pump are commonly reported. A variable-speed pump costs more upfront (often $1,200–$2,500 installed, estimate), so payback is typically 3–6 years for a pool used all summer.

Tip: Many single-speed pumps run longer than needed. Ask your pool professional how many turnovers your pool needs, then set the timer to match rather than running all day.

How much does it cost to heat a pool in Ontario?

Ontario's short swimming season and cool nights make heating a major cost for many pool owners. Most of a pool's heat is lost through evaporation from the surface, which is why covers work so well.

Heater type	How it works	Rough season cost range (estimate)
Natural gas heater	Burns gas; heats quickly	$250–$800+
Propane heater	Burns propane; heats quickly	Often higher than natural gas
Heat pump pool heater	Moves heat from air; COP of roughly 4–6 in warm weather	$200–$600
Solar thermal collectors	Pool water circulates through rooftop or ground collectors	Pump energy only
Solar cover (bubble blanket)	Cuts evaporation; adds some solar gain	$0 to run

Assumptions for the ranges: a typical backyard pool of about 40–60 m³ (roughly 10,000–16,000 gallons), heated from late May to mid-September, gas at 45¢/m³ and electricity at 15¢/kWh. Costs rise sharply if you keep the water very warm, swim into October or never cover the pool.

Heat pump pool heaters are efficient in summer because the outdoor air is warm, but they heat slowly and lose efficiency as air temperatures fall below about 10–15 °C. They suit owners who keep the pool at a steady temperature. Gas heaters suit quick heat-ups for occasional use but cost more per degree. Gas heater installation must be done by a TSSA-registered contractor.

Note: A pool cover can reduce heating needs by roughly half or more, by some estimates. It also reduces water and chemical loss. If you heat your pool and do not use a cover, start there.

Timing pool and hot tub use around your price plan

Pumps and heaters are flexible loads, which makes them good candidates for shifting.

• Time-of-Use (summer, May 1–Oct 31): weekday on-peak is 11 a.m. to 5 p.m. at 18.9¢/kWh commodity. Off-peak is 7 p.m. to 7 a.m. and all weekend at 9.1¢.
• Ultra-Low Overnight: 3.7¢/kWh from 11 p.m. to 7 a.m. every day, but 37.7¢ on weekdays from 4 to 9 p.m.

Running a pool pump overnight on ULO can cut its commodity cost significantly, as long as the pump is not running during the 4–9 p.m. weekday window. Overnight filtration is fine for most pools, though some owners prefer daytime circulation while chlorinating or when heating with solar collectors. Read our analysis of whether Ultra-Low Overnight is worth it, or compare plans with the electricity price plan calculator.

Electrical requirements for new installations

A new hot tub usually needs a dedicated 240 V circuit, commonly 40–60 A, with ground fault protection and a disconnect within sight of the tub. Pool pumps, heaters and lighting have their own bonding and protection rules. In Ontario, this work requires an ESA permit, and pools and hot tubs are an area where professional installation really matters for safety.

In older homes with 100 A service, a hot tub combined with central air, an EV charger or a heat pump can strain capacity. Have an electrician do a load calculation before you buy; see our guide to electrical panel upgrades.

To see what your equipment actually uses, a whole-home monitor or circuit-level monitor works well for 240 V loads; see our guide to home energy monitors. Use the appliance energy cost calculator to model run time changes.

Frequently asked questions

Is it cheaper to leave a hot tub on or turn it off between uses?

For an outdoor tub in Ontario, keep it running at a modest temperature. Reheating a cold tub takes a lot of energy, and in winter a tub left off risks freezing. Lowering the set point a few degrees between uses is the usual compromise.

Should I drain my hot tub for the winter?

If you will not use it from November to April, draining and winterizing properly can save a few hundred dollars. It must be done thoroughly to prevent freeze damage; follow the manufacturer's instructions or hire a professional.

Does a variable-speed pump really pay back?

For a pool run most of the summer, usually yes within a few years. For a small above-ground pool with short run times, payback is slower.

What temperature should I keep my pool?

Each degree warmer increases heating cost noticeably. Around 26–28 °C is comfortable for most families; lowering by 1–2 °C and always covering the pool at night will cut heating costs substantially.