Do Smart Thermostats Save Money?
Updated for 2026
Smart thermostats promise lower heating bills, but do they actually save money in real UK homes? This guide explains where savings come from, when a smart thermostat is worth buying, and when smart TRVs may help reduce wasted heating even further.
Quick Answer: Do Smart Thermostats Save Money?
Yes, smart thermostats can save money, but not because they make your boiler or heat pump magically more efficient.
The savings usually come from reducing wasted heating. A smart thermostat can help you heat your home only when needed, avoid poor schedules, turn heating down more easily and reduce the chances of heating an empty house.
Homes with old timers, basic thermostats, irregular routines or heating that is often left running unnecessarily usually have the highest savings potential.
The reality
Smart thermostats save money by improving control and changing heating habits. If your current heating schedule is already very efficient, savings may be smaller.
How Smart Thermostats Save Money
A smart thermostat does not reduce bills by making fuel cheaper. It helps by reducing unnecessary heating.
| Saving Method | How It Helps | Best For |
|---|---|---|
| Better schedules | Reduces heating when the home does not need to be warm | Homes with old timers |
| Remote app control | Lets you turn heating down when plans change | Busy households |
| Lower average temperatures | Makes small temperature reductions easier to maintain | Homes that overheat |
| Geofencing | Can adjust heating when people leave or return | Irregular routines |
| Usage insights | Helps spot wasteful heating habits | Homes trying to reduce bills |
How Much Money Can a Smart Thermostat Save?
Actual savings vary significantly between households because heating habits vary.
If your heating is often left on too long, a smart thermostat has more opportunity to reduce waste. If you already manage schedules carefully and rarely overheat the home, the savings may be smaller.
| Current Situation | Potential Saving | Why |
|---|---|---|
| Heating often left running unnecessarily | Higher | More wasted heating to reduce |
| Basic manual controls | Moderate to high | Smart schedules are easier to manage |
| Irregular work or family routines | Moderate to high | App control and geofencing can help |
| Already using schedules effectively | Lower to moderate | Less waste to remove |
| Highly energy-conscious household | Lower | You may already be doing the main saving actions manually |
Do Smart Thermostats Save Money With Gas Boilers?
Yes, gas boiler homes are often where smart thermostats deliver the clearest savings.
If your current setup uses a simple timer and basic thermostat, upgrading can make it easier to avoid heating an empty home or running the system longer than needed.
Smart thermostats can be particularly useful if:
- Your daily routine changes frequently
- You work shifts
- You regularly forget to adjust heating schedules
- You travel often
- Your heating is controlled by an old timer
- You want easier control from your phone
Do Smart Thermostats Save Money With Heat Pumps?
Heat pumps work differently from boilers, so the answer is more nuanced.
A heat pump usually operates most efficiently when maintaining steadier temperatures rather than constantly switching on and off. A smart thermostat can still improve comfort and control, but aggressive schedules and large temperature setbacks may reduce efficiency in some homes.
For heat pump homes, focus on suitable flow temperatures, sensible schedules and controls that support steady operation.
When Smart Thermostats Usually Save the Most Money
Higher Savings Potential
- Older manual controls
- Irregular work patterns
- Heating often left running
- Frequent travelling
- Poor schedule management
- Homes that often overheat
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Lower Savings Potential
- Already optimised schedules
- Consistent daily routine
- Energy-conscious household
- Modern programmable thermostat already installed
- Minimal heating use
- Poor insulation is the main issue
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Best Smart Thermostats for Saving Money
If your goal is to reduce wasted heating, the best smart thermostat is usually the one that makes better heating habits easier to maintain.
The strongest options for most UK homes are tado° Smart Thermostat X, Hive Active Heating and Drayton Wiser.
tado° Smart Thermostat X – Best Overall for Reducing Heating Waste
Best Overall
Best for: Homes that want strong scheduling, app control and the option to add smart TRVs later.
tado° is a strong choice if your heating bills are high because heating runs when it is not needed, routines change often or rooms are used at different times.
Its biggest advantage is flexibility. You can start with the main smart thermostat and add smart radiator valves later for room-by-room control.
- Excellent app control and scheduling
- Useful energy-saving features
- Strong smart TRV support
- Good for homes with changing routines
- Best all-round smart heating control option
Why we recommend it: tado° is the best all-round option if you want smart heating control that can grow into a more complete system.
Best for you if: You want better schedules now and may want room-by-room control later.
Hive Active Heating – Best Simple Upgrade from Old Controls
Best for Simplicity
Best for: Homes with old heating timers or basic thermostats that are hard to control.
Hive is a good choice if you mainly want a simple way to control heating from your phone and improve schedules. It is easy to use and works well for homeowners who do not want lots of advanced settings.
If your current timer is awkward, Hive can help you avoid leaving the heating on longer than needed.
- Very easy to use
- Simple app control
- Good upgrade from old timers
- Familiar UK brand
- Best for straightforward heating control
Why we recommend it: Hive is one of the easiest ways to improve heating control without overcomplicating the setup.
Best for you if: You want simple scheduling and phone control.
Drayton Wiser – Best Value for Room-by-Room Expansion
Best Value for Zoning
Best for: Homes that want smart thermostat control with a good route into smart radiator valves.
Drayton Wiser is a strong option if you want to reduce wasted heating room by room. It is especially useful if spare bedrooms, offices or upstairs rooms are heated when they do not need to be.
- Good value for money
- Strong smart TRV support
- Useful for room-by-room heating
- Good app control
- Expandable over time
Why we recommend it: Drayton Wiser is a strong value option if you want better control without paying the highest prices.
Best for you if: You want smart thermostat control and may add TRVs across several rooms.
Can Smart Thermostats Pay for Themselves?
Many homeowners ask whether the savings justify the purchase price.
The answer depends on:
- Purchase cost
- Installation cost
- Current heating habits
- Property size
- Energy prices
- How consistently you use the features
For some households, the thermostat may effectively pay for itself over time through reduced waste. For others, the biggest value is convenience and comfort rather than direct financial savings.
Most realistic view
A smart thermostat is usually best seen as a control upgrade first and a money-saving upgrade second. The savings depend on how much waste it helps you remove.
Smart Thermostat vs Smart TRV for Saving Money
Many homeowners wonder whether a smart thermostat or smart TRVs will reduce bills more.
For most homes, a smart thermostat should be the first upgrade because it controls the main heating schedule. Smart TRVs become more valuable when different rooms need different temperatures or schedules.
| Upgrade | Best For | How It Can Save Money |
|---|---|---|
| Smart thermostat | Poor schedules and heating left on too long | Reduces unnecessary whole-home heating |
| Smart TRVs | Rooms used at different times | Reduces heating in unused or overheated rooms |
| Smart thermostat plus smart TRVs | Larger homes and uneven heating | Combines better schedules with room-by-room control |
Smart TRVs That Can Improve Savings Further
If your main thermostat schedule is already good but some rooms are still being heated unnecessarily, smart TRVs may be the better next upgrade.
They can be especially useful for bedrooms, spare rooms and home offices that need different temperatures from the rest of the house.
tado° Smart Radiator Thermostat X – Best Overall Smart TRV Add-On
Best Overall Smart TRV
Best for: Homes that want room-by-room control alongside a smart thermostat.
The tado° Smart Radiator Thermostat X is useful if you want to reduce heating waste in specific rooms. For example, a spare bedroom may not need to be warm every day, while a home office may need heat during working hours.
- Excellent room-by-room scheduling
- Strong app control
- Good match with tado° smart thermostats
- Useful for bedrooms, spare rooms and offices
- Strong all-round smart TRV option
Best for you if: You want to reduce wasted heating in individual rooms.
Drayton Wiser Smart Radiator Thermostat – Best Value Smart TRV Add-On
Best Value Smart TRV
Best for: Homes that want to control multiple rooms without paying premium prices.
Drayton Wiser TRVs are a good value option if savings are likely to come from reducing heating waste across several rooms rather than just improving the main heating schedule.
- Good value for multiple rooms
- Useful room-by-room scheduling
- Strong match with Drayton Wiser controls
- Good for family homes and spare rooms
- Practical upgrade path over time
Best for you if: You want smart TRVs in several rooms without overspending.
Common Reasons Smart Thermostats Fail to Save Money
Smart thermostats can disappoint if they are installed but not used properly.
- Heating schedules are poorly configured
- Room temperatures are increased unnecessarily
- The thermostat is installed in a poor location
- Users constantly override schedules
- The home has significant insulation problems
- Heating is left on for comfort rather than need
- Smart features are not enabled or used consistently
- Expectations are unrealistic
Smart controls help manage heating better, but they cannot fix heat loss through poorly insulated walls, roofs, floors or windows.
Our Verdict
For many UK homeowners, smart thermostats do save money, especially when replacing basic heating controls or improving poor heating habits.
However, the biggest benefits are often convenience, comfort and control rather than huge reductions in energy bills.
If your main problem is whole-home scheduling, start with a smart thermostat. If your main problem is heating rooms that are not being used, add smart TRVs for room-by-room control.
Best takeaway
If you frequently waste heating, have basic controls or want easier management of your home heating, a smart thermostat is usually one of the best-value upgrades available.
Frequently Asked Questions
Do smart thermostats save money?
Smart thermostats can save money if they help reduce wasted heating, improve schedules or stop the heating running when nobody needs it. Savings depend on your current heating habits.
How do smart thermostats save money?
They save money by making it easier to manage heating schedules, reduce overheating, turn heating down remotely and avoid heating an empty home.
Will a smart thermostat make my boiler more efficient?
No. A smart thermostat does not make the boiler itself more efficient. It helps reduce waste by improving how and when the heating is used.
Do smart thermostats save money with gas boilers?
Yes, they can be useful with gas boilers, especially where the current controls are old, awkward or poorly scheduled.
Do smart thermostats save money with heat pumps?
They can help with control, but heat pumps often perform best with steady temperatures. Large stop-start schedules may not be ideal for every heat pump system.
Are smart TRVs better than smart thermostats for saving money?
They solve different problems. A smart thermostat improves the main heating schedule, while smart TRVs reduce waste in individual rooms.
Which smart thermostat is best for saving money?
For most homes, tado° is a strong all-round option, Hive is best for simplicity, and Drayton Wiser is useful if you want value and room-by-room expansion.
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Sources & Further Reading
Related Guides
- Best Smart Thermostats
- Best Smart Thermostat for Gas Boilers
- Are Smart Thermostats Worth It?
- Smart Thermostat vs Smart TRV
- Best Smart TRVs
- Are Smart TRVs Worth It?
- Why Are My Energy Bills So High?
- Is It Cheaper To Leave The Heating On All Day?
- Best Heating Upgrades Before Replacing Your Boiler
- Heat Pump Running Costs
Ready To Reduce Wasted Heating?
Start with a smart thermostat if your main problem is poor scheduling. Add smart TRVs if individual rooms are being heated unnecessarily.