Hot tub running costs in Mallorca: real monthly figures by series

The second question every buyer asks, after the price, is what the tub will cost each month. In Mallorca the honest answer is less than most people fear, and the reason is the climate. A hot tub loses heat in proportion to the gap between the water and the air around it. In Palma that gap is small for eight months of the year and modest for the other four. Here are the real numbers, how they split by series, and where owners waste money.

Running costs by series

These figures assume €0.22 per kWh, water at 38 °C, three uses a week and a good cover kept closed. They are for electricity only.

• Essential 5-seat (Cala 5, 3 kW heater, one pump): about €35–45 a month in summer and €60–80 in winter.
• Premium 5-seat (Serra 5, 4.5 kW heater, two pumps plus a circulation pump): about €30–40 in summer and €50–70 in winter. Better insulation and the small circulation pump are what bring it under the Essential figure despite the larger heater.
• Signature 5-seat (Mar 5, full-foam insulation, UV and ozone): about €25–35 in summer and €45–60 in winter.
• Swim spas (Nedar range, 6,500–9,500 litres): about €90–130 a month in summer and €180–260 in winter.

Heater size is not what drives the bill. A bigger heater simply reaches temperature faster and then switches off. Insulation, the cover and how often the water is exposed to the air decide the monthly figure.

Why Mallorca is cheaper than northern Europe

A tub in Munich or Manchester sits in air at 0 to 5 °C for much of the winter. The same tub in Mallorca sits in air that averages about 10 °C at night and 15 °C by day in January, the coldest month. The temperature gap the heater has to fight is roughly a third smaller, and heat loss falls with it. From May to October the night air rarely drops below 18 °C, so a well-covered tub barely needs the heater at all between uses. That is why the summer figures above are so low and why owners who move here from Germany or the UK are usually pleasantly surprised by the first bill.

The exceptions are exposed sites. A terrace in the Tramuntana foothills near Valldemossa or Bunyola can be several degrees colder than Palma and windier, and wind strips heat from a cover faster than still cold air does. A windbreak or a pergola on the exposed side is worth more there than any other upgrade.

Where the kilowatt-hours go

For a typical Premium tub, the electricity splits roughly like this:

• Heat loss through the cover and shell when the tub is closed: the largest share, 50 to 60 per cent, and almost entirely dependent on insulation and cover quality.
• Heat loss during use: 15 to 20 per cent. An open tub at 38 °C in a January evening loses heat fast, and air jets push cool air through the water.
• Circulation pump and filtration: 10 to 15 per cent. A 24-hour circulation pump draws about as much as a light bulb.
• Jet pumps during use: under 10 per cent. Three sessions a week of 20 minutes with two 3 HP pumps is only about 3 kWh a week.
• Reheating after a water change: a few per cent. Heating 1,400 litres from 18 °C to 38 °C takes about 33 kWh, or just over €7 at €0.22, three or four times a year.

The cover does most of the work

Covers are the part that owners underrate. A tapered, dense foam cover with a tight seal and a vapour barrier keeps the water surface, where almost all the heat escapes, sealed in. A cover that has absorbed water is heavy, cold to the touch and can double heat loss on its own. Under the island's sun a cheap vinyl cover degrades in two or three summers. Signs it needs replacing: it feels much heavier than when new, it sags in the middle, or there is condensation inside the vinyl. A cover lifter (€345) makes it far more likely the cover goes back on properly every time, which matters more than it sounds.

Circulation pumps and filtration cycles

Essential models filter the water by running the main jet pump on low speed for set periods each day. Premium and Signature models have a separate circulation pump that runs continuously and draws very little. Both work, but the circulation pump is cheaper over the year and keeps the water clearer. On an Essential tub, set two filtration cycles of two to three hours rather than leaving a long cycle on by default. The heater runs during filtration anyway, so timing the cycles into the cheap hours saves money twice.

Tariffs: use the valley hours

Most households in Spain are on a tariff with three time periods. The valley period (valle) runs from midnight to 8 am on weekdays and all day at weekends and national holidays, and the price per kWh is substantially lower than the peak (punta) period in the late morning and evening. A hot tub is an ideal load to shift. Program filtration and heating cycles into the valley window using the control panel or the app, and the tub will do most of its reheating while electricity is cheap and sit insulated through the expensive hours. The water will still be at temperature when you want it at 8 pm. Owners on a flat-rate contract gain nothing from scheduling, so it is worth checking which contract you have.

If you have solar panels

A PV system changes the arithmetic completely. A 4.5 kW heater fits comfortably inside the midday output of a 5 kWp roof system, and the sun shines here on most days from October to March, when the heating demand is highest. Schedule filtration and heating from about 11 am to 4 pm and the tub becomes a thermal battery, storing cheap daytime energy in 1,400 litres of water. With PV, summer running costs come close to zero and winter costs fall to a fraction of the figures above. A swim spa pairs especially well with a larger array because its demand is bigger and its water volume holds heat longer.

Water and chemicals

Water is a small cost. A Serra 5 holds 1,400 litres, about 1.4 m³, and most municipalities on the island charge a few euros per cubic metre, so a full refill is in the range of €3–5 before heating. Chemicals and consumables for a hot tub come to around €15–25 a month for sanitiser, pH adjuster, calcium control (important here) and filter cleaner, plus a new filter cartridge or two each year. If you would rather not do it yourself, a water care visit starts at €95 and a full water change at €180.

A worked example: Serra 5 in Palma

Take a Serra 5, three uses a week, 38 °C, cover closed otherwise, valley-hour scheduling, standard mains electricity at €0.22 per kWh.

• May to October, six months at about €35: €210.
• November to April, six months at about €60: €360.
• Three water changes with reheating: about €22.
• Chemicals and filters: about €240.

That is roughly €830 a year all in, or about €70 a month, of which about €570 is electricity. On a flat tariff with the cover left off after evening use, the same tub can reach €1,000 a year in electricity alone.

Mistakes that double the bill

• Leaving the cover off after an evening session. One night open in January costs more than a week closed.
• Turning the temperature down between uses. Dropping to 30 °C and reheating every weekend costs more than holding 38 °C. Only lower it if you are away for more than a week.
• A waterlogged cover. Replace it rather than tolerate it.
• Dirty filters. A clogged cartridge makes the pump work harder and the heater run longer. Rinse weekly, soak monthly.
• Running air jets for long periods on cold evenings. They are pumping January air through the water.
• Heating during peak hours when a schedule would do it at night.
• Siting the tub in the wind with nothing on the Tramuntana side.

Our take

For most families a Premium tub in Mallorca costs about the same per month as a streaming subscription or two, less with solar. The running cost estimate on each model page on this site shows summer and winter figures for that exact model so you can compare the Essential, Premium and Signature series before you decide where the money goes, into the tub or into the electricity bill.