Hot Tub Running Costs UK: What You’ll Actually Pay in 2026
You open the electricity bill, scan down to the weeks since the hot tub arrived, and the number sitting there is higher than the £30 you were quietly hoping for. That’s the moment most people search hot tub running costs UK, trying to work out if the jump is normal or something’s gone wrong.
The good news: that number is shaped far less by which hot tub you bought than by two levers rarely mentioned at sale, your actual Ofgem tariff and how often you reheat from cold. This guide uses the current price cap to show what a UK hot tub costs, and the cost drivers most guides skip.
Key Takeaways:
- UK hot tubs typically cost £800–£1,075 a year all in, or £67–£90 a month; electricity alone usually runs £15–£50 a month.
- The Ofgem price cap sets your electricity unit rate, and it varies by a few pence per kWh depending on Direct Debit, prepayment, or pay-on-receipt.
- Insulation and cover condition drive most of the spread between a cheap and an expensive tub, not the model itself.
- For most owners, turning the temperature down between uses costs less than holding it at full temperature around the clock.
- Every full drain and refill is a cold-to-hot reheat, one of the most expensive heating cycles a hot tub runs.
How Much Does a Hot Tub Cost to Run in the UK?
A UK hot tub typically costs £800 to £1,075 a year to run, or around £67 to £90 a month, once electricity, servicing, water care and filters are added together. Energy efficient hot tubs with good insulation sit near the bottom of that range.
Two different numbers come up here, and they’re easy to mix up.
One is electricity alone. The other is the full cost once servicing and water care are added in, which is why the totals below don’t match at first glance.
According to Centura Heat, UK hot tubs typically use 30 to 90 kWh a month, which lands in a £15 to £50 monthly band for electricity alone before servicing and chemicals are added.
That range assumes a fairly typical setup: a hot tub holding around 1,500 litres, with a well insulated hot tub cover, used a few times a week.
Larger, older, or poorly insulated tubs run toward the top, and heavy daily hot tub use pushes energy costs higher still.
What Does the Annual Total Actually Include?
Electricity is only part of the yearly figure; servicing, water care, and filters make up the rest of the £800–£1,075 total. The table below shows how the categories stack up.
- Electricity: roughly £180–£600 a year (£15–£50/month)
- Servicing: £100–£250 a year
- Water care products: £250–£350 a year
- Filter replacement: £30–£50 a year
Cost category
Typical UK range
Monthly electricity
£15–£50
Annual servicing
£100–£250
Annual water care
£250–£350
Annual filters
£30–£50
Total annual (all in)
£800–£1,075
Manufacturers sometimes claim all our hot tubs are efficient by design, but hot tub energy consumption comes down to insulation, cover condition and actual use, not the brand on the panel.
For the full comparison, see our complete hot tub running cost breakdown.
Why Is the Ofgem Price Cap the Real Variable?
Your electricity unit rate is set by Ofgem’s price cap, not by your hot tub, and it moves every few months. For July to September 2026, Ofgem confirms Direct Debit customers pay an average of 26.11p/kWh, with the standard variable cap at 24.67p/kWh plus a 57.21p daily standing charge.
Most UK hot tub owners never check which payment method they’re actually on.
The gap between them is bigger than it looks on a hot tub-sized load.
What’s the Gap Between Direct Debit, Prepayment, and Paying on Receipt?
The rate can shift by roughly 2p per kWh depending purely on how you pay, according to MoneySavingExpert . That gap alone can add several pounds a month to a hot tub’s usage, before insulation or habits enter the picture.
Payment method
Unit rate
Direct Debit
26.11p/kWh
Prepayment
25.32p/kWh
Pay on receipt of bill
27.56p/kWh
Where Does the Heat, and the Money, Actually Go?
The spread between a £30 and a £90 hot tub of the same size almost always comes down to insulation and cover condition, not the tub itself. Adjusting the water temperature by a single degree is often enough to noticeably shift the bill.
A well-fitted cover, four inches thick or more, is the biggest lever an owner controls directly.
Hot tub insulation quality matters every bit as much as the cover, since both work together to hold heat in rather than lose it to the air outside.
A soft or waterlogged cover quietly lets heat escape, and it rarely shows up as anything dramatic, only a slightly higher bill each month.
That’s the single biggest hidden driver of hot tub running costs in a UK winter, and it’s where energy efficiency is often decided before temperature ever gets touched.
Running costs also shift with the seasons, not only with habits.
Winter increases heat loss, since the gap between water and air temperature is larger, while summer usually eases it.
How Much Difference Does a Good Cover Actually Make?
A damaged or poorly fitted cover can plausibly add several hundred pounds a year: moving from the low to the high end of the typical £15–£50 monthly electricity band is itself around £35 a month, or roughly £420 a year, from heat loss alone.
Replacing a tired cover, or adding a thermal layer underneath, often earns back its cost within a season or two, depending on how poor the starting cover was.
Should You Run It 24/7, or Turn It Down Between Uses?
For most owners using the tub a few times a week or less, turning the temperature down between soaks costs less than holding it at full temperature around the clock. Reheating a few degrees back up costs less than the steady heat loss of maintaining full temperature on days you’re not using it.
This is the question community forums argue about most.
Does It Depend on How Often You Use the Hot Tub?
How much electricity a single reheat uses depends heavily on frequency, which is why the honest answer isn’t a flat yes or no.
Owners soaking most days often find holding a steady temperature evens out, since they’re paying for near-constant small reheats either way.
Owners using the tub once or twice a week save more by dropping the temperature between sessions, especially if they can also shift the reheat to off-peak hours.
Either way, the hot tub’s own insulation quality decides how expensive each reheat turns out to be, and energy efficiency here has more to do with the cover than the thermostat.
What Are Five Ways to Cut Your Hot Tub Running Costs?
Insulation, tariff timing, temperature, filters, and drain frequency account for nearly all the room owners have to lower a hot tub bill without buying anything new or calling a professional. None of these five cost anything to try, and most take less than an afternoon.
- Fit or repair a thermal cover so heat stops leaking at the surface
- Shift heating to off peak hours once you’ve confirmed your actual tariff
- Drop the set temperature by 1–2°C when you’re not expecting to use the tub that week
- Clean filters weekly instead of waiting until they look dirty, since a clogged filter forces the pump to work harder
- Avoid draining and refilling more often than the water needs, since every refill is a full reheat from cold
Which of These Is Easiest to Forget?
Hot tub filters are the easiest item on this list to neglect, since a dirty one still looks fine while quietly costing more to run.
More tariff detail lives in lowering your hot tub energy bill.
Why Does Draining and Refilling Cost More Than People Think?
Every full drain and refill means reheating from cold mains water to 38–40°C, the single most energy-intensive cycle a hot tub performs, regardless of tariff or time of day, and it’s where a meaningful share of the annual bill actually sits.
Most owners accept “you drain it every few months” as a fixed cost, without connecting that moment to the spike on the bill that follows.
Why Doesn’t Anyone Mention This at the Point of Sale?
Nobody tells you at sale that the reheat is where a meaningful chunk of the annual total sits, not the day-to-day work of maintaining temperature.
That’s not a mistake on the owner’s part.
It’s a gap in what gets explained upfront.
How Does O-Care Fit Into the Reheat Problem?
This is where extending the safe interval between full water changes earns its place.
O-Care’s mineral salts break down the sediment that would otherwise force a sanitizer to work harder, pushing owners toward draining sooner than needed.
Fewer full changes means fewer of these expensive cold-to-hot cycles, on top of the weekly water care routine doing less overall work.
You still need chlorine or bromine either way. What changes is how much, up to 78% less.
The Bill You Control Is Bigger Than It Looks
The number on your bill was never fixed the day you bought the tub. Your Ofgem tariff, your cover, your temperature habits, and how often you reheat from cold all move it more than the model name on the panel ever will.
Start with the cover and the tariff this week, since both cost nothing to check and both compound every month after.
The drain-refill habit is the one most owners never think to change, and it’s the biggest lever in the bill.
None of it depends on the hot tub you buy. It depends on how this one is run.
Wondering how much longer your water could go? See how O-CareComfort works →
FAQs
How much does it cost to run a hot tub per month in the UK?
Most UK hot tub owners pay roughly £67 to £90 a month all in, or £15 to £50 for electricity alone, totalling £800 to £1,075 a year.
Is it cheaper to leave a hot tub on all the time or turn it off between uses?
For occasional use, turning the temperature down between uses usually costs less than holding full temperature around the clock. Frequent daily users often find it evens out.
How much does it cost to run a hot tub for 24 hours?
Using the July to September 2026 Ofgem Direct Debit rate of 26.11p/kWh and typical 30–90 kWh monthly usage, a day’s running cost lands roughly between £1 and £3, depending on insulation and season.
Is a hot tub expensive to run in the UK right now?
Costs have risen with the Ofgem price cap, but insulation and habits matter more than most people expect. A well-insulated tub run with attention can sit near the low end of the £15 to £50 monthly electricity band.
What is the cheapest way to heat a hot tub in the UK?
Confirm your actual tariff first, since Direct Debit, prepayment, and pay-on-receipt rates differ by a couple of pence per kWh. Shift heating to off peak hours, and keep the cover in good condition.
Does draining and refilling a hot tub affect running costs?
Yes. Reheating a full refill from cold mains temperature to 38–40°C is the single most energy-intensive cycle a hot tub performs, so extending the interval removes some of the most expensive heating events outright.
You open the electricity bill, scan down to the weeks since the hot tub arrived, and the number sitting there is higher than the £30 you were quietly hoping for. That’s the moment most people search hot tub running costs UK, trying to work out if the jump is normal or something’s gone wrong.
The good news: that number is shaped far less by which hot tub you bought than by two levers rarely mentioned at sale, your actual Ofgem tariff and how often you reheat from cold. This guide uses the current price cap to show what a UK hot tub costs, and the cost drivers most guides skip.
Key Takeaways:
- UK hot tubs typically cost £800–£1,075 a year all in, or £67–£90 a month; electricity alone usually runs £15–£50 a month.
- The Ofgem price cap sets your electricity unit rate, and it varies by a few pence per kWh depending on Direct Debit, prepayment, or pay-on-receipt.
- Insulation and cover condition drive most of the spread between a cheap and an expensive tub, not the model itself.
- For most owners, turning the temperature down between uses costs less than holding it at full temperature around the clock.
- Every full drain and refill is a cold-to-hot reheat, one of the most expensive heating cycles a hot tub runs.
How Much Does a Hot Tub Cost to Run in the UK?
A UK hot tub typically costs £800 to £1,075 a year to run, or around £67 to £90 a month, once electricity, servicing, water care and filters are added together. Energy efficient hot tubs with good insulation sit near the bottom of that range.
Two different numbers come up here, and they’re easy to mix up.
One is electricity alone. The other is the full cost once servicing and water care are added in, which is why the totals below don’t match at first glance.
According to Centura Heat, UK hot tubs typically use 30 to 90 kWh a month, which lands in a £15 to £50 monthly band for electricity alone before servicing and chemicals are added.
That range assumes a fairly typical setup: a hot tub holding around 1,500 litres, with a well insulated hot tub cover, used a few times a week.
Larger, older, or poorly insulated tubs run toward the top, and heavy daily hot tub use pushes energy costs higher still.
What Does the Annual Total Actually Include?
Electricity is only part of the yearly figure; servicing, water care, and filters make up the rest of the £800–£1,075 total. The table below shows how the categories stack up.
- Electricity: roughly £180–£600 a year (£15–£50/month)
- Servicing: £100–£250 a year
- Water care products: £250–£350 a year
- Filter replacement: £30–£50 a year
| Cost category | Typical UK range |
|---|---|
| Monthly electricity | £15–£50 |
| Annual servicing | £100–£250 |
| Annual water care | £250–£350 |
| Annual filters | £30–£50 |
| Total annual (all in) | £800–£1,075 |
| Manufacturers sometimes claim all our hot tubs are efficient by design, but hot tub energy consumption comes down to insulation, cover condition and actual use, not the brand on the panel. |
For the full comparison, see our complete hot tub running cost breakdown.
Why Is the Ofgem Price Cap the Real Variable?
Your electricity unit rate is set by Ofgem’s price cap, not by your hot tub, and it moves every few months. For July to September 2026, Ofgem confirms Direct Debit customers pay an average of 26.11p/kWh, with the standard variable cap at 24.67p/kWh plus a 57.21p daily standing charge.
Most UK hot tub owners never check which payment method they’re actually on.
The gap between them is bigger than it looks on a hot tub-sized load.
What’s the Gap Between Direct Debit, Prepayment, and Paying on Receipt?
The rate can shift by roughly 2p per kWh depending purely on how you pay, according to MoneySavingExpert . That gap alone can add several pounds a month to a hot tub’s usage, before insulation or habits enter the picture.
| Payment method | Unit rate |
|---|---|
| Direct Debit | 26.11p/kWh |
| Prepayment | 25.32p/kWh |
| Pay on receipt of bill | 27.56p/kWh |
Where Does the Heat, and the Money, Actually Go?
The spread between a £30 and a £90 hot tub of the same size almost always comes down to insulation and cover condition, not the tub itself. Adjusting the water temperature by a single degree is often enough to noticeably shift the bill.
A well-fitted cover, four inches thick or more, is the biggest lever an owner controls directly.
Hot tub insulation quality matters every bit as much as the cover, since both work together to hold heat in rather than lose it to the air outside.
A soft or waterlogged cover quietly lets heat escape, and it rarely shows up as anything dramatic, only a slightly higher bill each month.
That’s the single biggest hidden driver of hot tub running costs in a UK winter, and it’s where energy efficiency is often decided before temperature ever gets touched.
Running costs also shift with the seasons, not only with habits.
Winter increases heat loss, since the gap between water and air temperature is larger, while summer usually eases it.
How Much Difference Does a Good Cover Actually Make?
A damaged or poorly fitted cover can plausibly add several hundred pounds a year: moving from the low to the high end of the typical £15–£50 monthly electricity band is itself around £35 a month, or roughly £420 a year, from heat loss alone.
Replacing a tired cover, or adding a thermal layer underneath, often earns back its cost within a season or two, depending on how poor the starting cover was.
Should You Run It 24/7, or Turn It Down Between Uses?
For most owners using the tub a few times a week or less, turning the temperature down between soaks costs less than holding it at full temperature around the clock. Reheating a few degrees back up costs less than the steady heat loss of maintaining full temperature on days you’re not using it.
This is the question community forums argue about most.
Does It Depend on How Often You Use the Hot Tub?
How much electricity a single reheat uses depends heavily on frequency, which is why the honest answer isn’t a flat yes or no.
Owners soaking most days often find holding a steady temperature evens out, since they’re paying for near-constant small reheats either way.
Owners using the tub once or twice a week save more by dropping the temperature between sessions, especially if they can also shift the reheat to off-peak hours.
Either way, the hot tub’s own insulation quality decides how expensive each reheat turns out to be, and energy efficiency here has more to do with the cover than the thermostat.
What Are Five Ways to Cut Your Hot Tub Running Costs?
Insulation, tariff timing, temperature, filters, and drain frequency account for nearly all the room owners have to lower a hot tub bill without buying anything new or calling a professional. None of these five cost anything to try, and most take less than an afternoon.
- Fit or repair a thermal cover so heat stops leaking at the surface
- Shift heating to off peak hours once you’ve confirmed your actual tariff
- Drop the set temperature by 1–2°C when you’re not expecting to use the tub that week
- Clean filters weekly instead of waiting until they look dirty, since a clogged filter forces the pump to work harder
- Avoid draining and refilling more often than the water needs, since every refill is a full reheat from cold
Which of These Is Easiest to Forget?
Hot tub filters are the easiest item on this list to neglect, since a dirty one still looks fine while quietly costing more to run.
More tariff detail lives in lowering your hot tub energy bill.
Why Does Draining and Refilling Cost More Than People Think?
Every full drain and refill means reheating from cold mains water to 38–40°C, the single most energy-intensive cycle a hot tub performs, regardless of tariff or time of day, and it’s where a meaningful share of the annual bill actually sits.
Most owners accept “you drain it every few months” as a fixed cost, without connecting that moment to the spike on the bill that follows.
Why Doesn’t Anyone Mention This at the Point of Sale?
Nobody tells you at sale that the reheat is where a meaningful chunk of the annual total sits, not the day-to-day work of maintaining temperature.
That’s not a mistake on the owner’s part.
It’s a gap in what gets explained upfront.
How Does O-Care Fit Into the Reheat Problem?
This is where extending the safe interval between full water changes earns its place.
O-Care’s mineral salts break down the sediment that would otherwise force a sanitizer to work harder, pushing owners toward draining sooner than needed.
Fewer full changes means fewer of these expensive cold-to-hot cycles, on top of the weekly water care routine doing less overall work.
You still need chlorine or bromine either way. What changes is how much, up to 78% less.
The Bill You Control Is Bigger Than It Looks
The number on your bill was never fixed the day you bought the tub. Your Ofgem tariff, your cover, your temperature habits, and how often you reheat from cold all move it more than the model name on the panel ever will.
Start with the cover and the tariff this week, since both cost nothing to check and both compound every month after.
The drain-refill habit is the one most owners never think to change, and it’s the biggest lever in the bill.
None of it depends on the hot tub you buy. It depends on how this one is run.
Wondering how much longer your water could go? See how O-CareComfort works →
FAQs
How much does it cost to run a hot tub per month in the UK?
Most UK hot tub owners pay roughly £67 to £90 a month all in, or £15 to £50 for electricity alone, totalling £800 to £1,075 a year.
Is it cheaper to leave a hot tub on all the time or turn it off between uses?
For occasional use, turning the temperature down between uses usually costs less than holding full temperature around the clock. Frequent daily users often find it evens out.
How much does it cost to run a hot tub for 24 hours?
Using the July to September 2026 Ofgem Direct Debit rate of 26.11p/kWh and typical 30–90 kWh monthly usage, a day’s running cost lands roughly between £1 and £3, depending on insulation and season.
Is a hot tub expensive to run in the UK right now?
Costs have risen with the Ofgem price cap, but insulation and habits matter more than most people expect. A well-insulated tub run with attention can sit near the low end of the £15 to £50 monthly electricity band.
What is the cheapest way to heat a hot tub in the UK?
Confirm your actual tariff first, since Direct Debit, prepayment, and pay-on-receipt rates differ by a couple of pence per kWh. Shift heating to off peak hours, and keep the cover in good condition.
Does draining and refilling a hot tub affect running costs?
Yes. Reheating a full refill from cold mains temperature to 38–40°C is the single most energy-intensive cycle a hot tub performs, so extending the interval removes some of the most expensive heating events outright.
