Heating

Home Insulation Savings Calculator

Insulation cuts the energy you lose through walls, roof and floors — lowering both heating and cooling bills. This calculator estimates your annual saving and payback period.

Your details

Results

Estimated annual saving

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Payback period

Years until the project pays for itself.

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Net saving over 10 years

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Last updated June 30, 2026. Results update automatically as you type.

How it works

Annual saving = heating + cooling cost × (reduction ÷ 100). Payback = project cost ÷ annual saving. The 10-year figure is 10 years of savings minus the project cost. Better insulation also makes a home more comfortable and can raise its value — benefits not counted here.

Frequently asked questions

How much does insulation save?

It depends on your current insulation and climate, but upgrades commonly cut heating and cooling energy by 10–25%. Poorly insulated homes save the most.

What is a good insulation payback period?

Many insulation projects pay back in 3–8 years and then keep saving for decades, making them one of the highest-ROI energy upgrades.

Which insulation gives the best return?

Loft/attic insulation and sealing air leaks are usually the cheapest wins with the fastest payback. Wall insulation costs more but saves more in cold climates.

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.