AI Insight

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AI insights are recommendations. Actual savings depend on usage habits and installation quality.

Smart Home Energy Savings Calculator

How much could smart home devices actually save on your energy bills? Enter your current bills, select which devices you have or plan to install, and see total annual savings, combined cost and how long before they pay for themselves.

Quick Start

Step 1. Enter your bills
annual electricity, heating and cooling spend from your energy bills
Step 2. Select your devices
toggle on the smart devices you have or plan to buy
Step 3. Adjust costs
enter what you paid or plan to pay for each device
Step 4. See results
total annual saving, combined device cost and payback period

Tip: Check last year's energy bills for your total spend. Split heating (gas or oil boiler) from electricity if you pay them separately. The more accurate your bills, the more accurate your savings estimate.

Your Energy Bills

Enter your annual spend — check last year's bills or statements. These are the baselines we use to calculate savings for each device.

Total electricity spend per year including all appliances and lighting.
Gas, oil, district heating or electric heating — whichever heats your home.
Air conditioning cost. Leave at 0 if you do not use air conditioning.

Select Your Smart Devices

Toggle on the devices you have or plan to install. Adjust the cost to what you actually paid or plan to pay.

🌡️ Smart Thermostat saves ~15% of heating bill
Schedules setbacks when away or asleep. Typical saving: 10–23% of heating bill.
💡 Smart Lighting (whole home) saves ~12% of electricity bill
Auto-off, dimming and LED switching. Typical saving: 8–15% of lighting portion of electricity bill.
🔌 Smart Plugs (standby elimination) saves ~5% of electricity bill
Cuts standby power from TVs, chargers and appliances. Typical saving: 3–7% of electricity bill.
🚿 Smart Water Heater / Boiler Control saves ~10% of heating bill
Schedules hot water heating for off-peak hours and avoids heating unused water. Typical saving: 8–12% of water heating portion.
🪟 Automated Blinds / Shading saves ~20% of cooling bill
Blocks solar gain in summer, reduces cooling load. Typical saving: 15–25% of cooling bill.
❄️ Smart HVAC / Zone Control saves ~18% of cooling bill
Only heats/cools occupied zones. Typical saving: 15–25% of heating and cooling combined.
📊 Energy Monitor / Smart Meter Display saves ~8% of electricity bill
Awareness alone drives behaviour change. Studies show 5–12% electricity reduction after installing a real-time energy monitor.
🫧 Smart Appliances (washer / dishwasher) saves ~4% of electricity bill
Shift cycles to off-peak tariff times. Saving depends on tariff spread — most useful with time-of-use pricing.

Multi-year Projection

Smart home energy savings explained: which devices save the most and how to calculate ROI

How much energy can a smart home save?

The total energy saving from smart home technology depends on which devices you install and how much you currently spend on energy. Studies consistently show that a fully automated smart home can reduce total energy consumption by 20–35% compared to an unautomated home. The biggest wins come from smart thermostats (heating control), smart lighting and standby elimination.

Smart thermostat: the highest-impact device

Heating and cooling account for 50–70% of a typical home's energy use. A smart thermostat that programmes setbacks when you are away or asleep reduces this by 10–23%. At a typical European heating bill of €1,500/yr, that is €150–€345 saved annually — enough to pay back a €200 thermostat in under 18 months.

Smart lighting: LED plus automation

Switching to LED alone saves 60–80% of lighting energy compared to incandescent bulbs. Adding smart controls (auto-off when rooms are empty, dimming to 70% for ambient lighting) adds a further 15–25% saving on top of the LED saving. For a home spending €200/yr on lighting, smart controls can save €24–€50/yr.

Standby power: the hidden drain

The average household wastes 5–10% of its electricity on standby power — devices that draw power even when not in use. Smart plugs that cut power to TVs, game consoles, chargers and kitchen appliances when not needed can recover €50–€120/yr on a €1,200 electricity bill, with a payback of 3–6 months on a €15–€20 smart plug.

Calculating your smart home ROI

The return on investment for smart home devices depends on your current energy bills, the saving percentage for each device, and the upfront cost. Devices with low cost and high saving percentage (smart plugs, energy monitors) pay back in months. Higher-cost devices (automated blinds, smart HVAC zone control) may take 3–8 years to pay back financially, though they also deliver comfort and convenience value beyond the energy saving.

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