How much does it cost to run a hot tub per month?

Most inflatable and plug-and-play hot tubs cost roughly $30–$60 per month in electricity. Usage frequency, outdoor temperature, insulation quality, and your local power rate all move that number. Winter and heavy use push it toward the top of the range or beyond.

Are inflatable hot tubs expensive to run?

Not dramatically. An inflatable typically runs at the same $30–$60/month as a small plug-and-play spa. The catch is that inflatables have thinner insulation, so in cold weather they lose heat faster and the heater works harder.

What's the biggest factor in hot tub running cost?

Heat retention. A well-fitting insulated cover, a foam floor mat, and shelter from wind cut heat loss more than anything else — often trimming 20–40% off your bill. Water temperature and how cold it is outside come next.

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

For regular users (a few soaks a week), leaving it on at temperature is usually cheaper and easier than reheating from cold each time. If you'll go a week or more without using it, lowering the temperature — or draining in winter for freeze-prone models — saves more.

Hot Tub Running Cost Guide 2026: What You'll Really Pay

Quick Answer: Expect to spend roughly $30–$60 per month in electricity to run a hot tub in 2026. The exact figure depends on how often you soak, how cold it is outside, how well the tub is insulated, and your local power rate. The single biggest lever you control is heat retention — a good insulated cover and a foam floor mat can trim 20–40% off the bill.

“How much does it cost to run?” is the question that stops most people from buying a hot tub. The honest answer is: less than you probably fear, and largely within your control. Here’s a clear breakdown of what drives the cost and how to keep it down.

Typical monthly running costs

Hot tub type	Light use	Regular use	Winter / heavy use
Inflatable (Intex, SaluSpa)	~$20–$30/mo	~$30–$50/mo	$50–$80+/mo
Plug-and-play (AquaRest, Lifesmart)	~$25–$35/mo	~$30–$50/mo	$45–$70/mo
Hard-wired 240V spa	~$30–$40/mo	~$40–$60/mo	$60–$100+/mo

These are electricity-only estimates at an average US power rate; your bill scales directly with your local cents-per-kWh. Note that better-insulated plug-and-play spas often run no more than a thin-walled inflatable despite holding more water — insulation matters more than size.

What drives the cost

Heat retention. The biggest factor by far. Heat lost overnight is heat you pay to replace. A snug insulated cover, a foam floor mat, and a windbreak are the highest-return upgrades you can make.
Outdoor temperature. Cold air pulls heat out faster, so winter bills can double summer ones. This is why cold-weather models emphasize FreezeShield and EnergySense-style insulation.
Set temperature. Every degree costs money. Dropping from 104°F to 100°F between soaks noticeably reduces standby heating.
Usage pattern. Each soak vents hot air and water when you lift the cover, and the heater then reheats. Frequent short soaks cost more than the raw water volume suggests.
Local electricity rate. The same tub can cost twice as much to run in a high-rate region as a low-rate one. Check your per-kWh price to personalize the estimates above.

The best upgrade for cutting costs

Insulated Cover + Foam Floor Mat

Best cost-saver · ~$40–$120

A well-fitting insulated (or thermal) cover is the #1 way to slash standby heat loss.
A foam floor mat stops the cold ground stealing heat from the base — cheap and effective.
Together they can trim 20–40% off cold-weather running costs.
Also protects the liner and keeps debris out between soaks.

Check price on Amazon →

If you buy one accessory, make it insulation. A quality cover and a foam base mat pay for themselves within a season or two in reduced heating, and they make the tub more pleasant to use — less debris, faster warm-up, and steadier temperature.

Ways to lower your hot tub bill

Always cover it. An open tub is a money leak. Keep the insulated cover on whenever you’re not in it.
Insulate underneath and around. Foam floor tiles plus a windbreak dramatically cut heat loss.
Right-size the temperature. Lower the set point a few degrees between soaks; don’t chase 104°F when the tub sits idle for days.
Match the tub to your climate. In cold regions, a winter-rated model with better insulation costs less to run than a bargain tub you’re constantly reheating.
Soak on a schedule. Batching your sessions means fewer reheat cycles than random one-offs.

The bottom line

Running a hot tub in 2026 costs most people $30–$60 a month — and where you land in that range is mostly about insulation and how cold your winters get. Cover discipline plus a foam mat are the cheapest, biggest savings. Ready to pick a tub? Start with our best inflatable hot tub roundup, the best plug-and-play spas, or the best options for two.