Energy Savings Calculator
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How Much Could You Save on Energy Bills?
Every home is different, but most households can reduce energy bills by 30-60% through a combination of improvements. This calculator shows you exactly where your money goes and which upgrades offer the fastest payback.
Savings by Improvement Type
| Improvement | Annual Saving (EUR) | % of Typical Bill | Best For |
|---|---|---|---|
| Loft insulation (0 to 270mm) | 250-450 | 15-25% | Homes with less than 100mm insulation |
| Cavity wall insulation | 150-300 | 10-20% | Pre-1990 homes with unfilled cavities |
| Draught-proofing | 50-100 | 3-5% | Old windows and doors |
| Double glazing (from single) | 200-400 | 10-20% | Homes with single glazing |
| Solar panels (4kW) | 400-800 | 20-40% | South-facing roofs |
| Air source heat pump | 300-600 | 15-30% | Replacing old gas/oil boilers |
| Smart thermostat | 100-225 | 5-15% | Any home with central heating |
| LED lighting throughout | 50-100 | 3-5% | Homes still using halogen/CFL |
Cumulative Savings Over Time
| Year | Insulation Only | + Glazing | + Solar | + Heat Pump | All Four |
|---|---|---|---|---|---|
| 1 | EUR 350 | EUR 650 | EUR 1,250 | EUR 1,750 | EUR 1,750 |
| 5 | EUR 1,750 | EUR 3,250 | EUR 6,250 | EUR 8,750 | EUR 8,750 |
| 10 | EUR 3,500 | EUR 6,500 | EUR 12,500 | EUR 17,500 | EUR 17,500 |
| 15 | EUR 5,250 | EUR 9,750 | EUR 18,750 | EUR 26,250 | EUR 26,250 |
| 20 | EUR 7,000 | EUR 13,000 | EUR 25,000 | EUR 35,000 | EUR 35,000 |
These figures assume stable energy prices. With energy costs rising 3-5% per year, actual savings will be significantly higher. A comprehensive energy plan can save EUR 35,000-50,000 over 20 years.
Quick Wins: Free or Low-Cost Savings
Before investing in major improvements, capture free savings first. Turn down your thermostat by 1C (saves 10% on heating). Set hot water to 60C instead of 70C. Use the eco setting on your washing machine. Close curtains at dusk to retain heat. Turn off standby appliances. These habits alone save EUR 100-200 per year.
These calculations are estimates only. Actual requirements may vary depending on surface conditions, product specifications, and installation methods. Always consult a qualified professional for precise measurements.
Prices updated: 2026-03Frequently Asked Questions
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