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, how much you might save, and when a smart thermostat is worth the investment.
Quick Answer: Do Smart Thermostats Save Money?
Yes, smart thermostats can save money, but not because they make your boiler or heat pump more efficient.
The savings come from reducing wasted heating. A smart thermostat helps you heat your home only when needed, avoid overheating rooms and make it easier to adjust schedules.
The reality
Smart thermostats save money by changing behaviour and improving control.
Homes with poor schedules or heating left on unnecessarily often see the biggest savings.
How Smart Thermostats Save Money
1. Better schedules
Many homes heat empty properties for hours every week. Smart thermostats make it easier to create schedules that match your lifestyle.
2. Remote control
Forgot to turn the heating off before leaving? A smart thermostat lets you adjust settings from your phone rather than heating an empty house all day.
3. Lower average temperatures
Even reducing room temperatures by 1°C can lower heating costs. Smart thermostats make these adjustments easier to maintain.
4. Smarter routines
Many homeowners discover they were heating rooms longer than necessary. Usage reports and app control make these habits easier to spot.
5. Geofencing
Some systems can automatically adjust heating when everyone leaves the property and restore comfort before you return.
How Much Money Can a Smart Thermostat Save?
Actual savings vary significantly between households because heating habits vary.
| Current Situation | Potential Savings | Likelihood |
|---|---|---|
| Heating often left running unnecessarily | Higher savings potential | High |
| Basic manual controls | Moderate savings potential | High |
| Already using schedules effectively | Smaller savings | Medium |
| Highly energy-conscious household | Limited savings | Lower |
For many homeowners, the biggest benefit is often convenience and comfort rather than dramatic reductions in energy bills.
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 thermostat, upgrading can make it easier to avoid heating empty rooms or running the system longer than necessary.
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
- You want more control from your phone
If you’re considering bigger heating upgrades, read our Gas Boiler to Heat Pump guide.
Do Smart Thermostats Save Money With Heat Pumps?
Heat pumps work differently from boilers, so the answer is slightly more complicated.
A heat pump usually operates most efficiently when maintaining steady temperatures rather than constantly switching on and off.
Smart thermostats can still improve comfort and control, but aggressive schedules may actually reduce efficiency in some situations.
Read our guides on Best Smart Thermostats for Heat Pumps and Heat Pump Temperature Settings.
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
Lower Savings Potential
- Already optimised schedules
- Consistent daily routine
- Energy-conscious household
- Modern programmable thermostat already installed
- Minimal heating use
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
For some households, the thermostat may effectively pay for itself over time through reduced waste. For others, the biggest value comes from convenience and comfort rather than direct financial savings.
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 entire heating system.
Smart TRVs become more valuable when different rooms need different temperatures.
Common Reasons Smart Thermostats Fail to Save Money
- 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
- Expectations are unrealistic
Smart controls help manage heating better, but they cannot fix heat loss through poorly insulated walls, roofs 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.
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.