Free Tool
Home Insulation Savings Calculator
Find out how much you could save by insulating your home — and whether you qualify for free insulation via ECO4.
Your home
What type of property do you live in?
Annual heating bill: £1,200
Which insulation do you currently have?
Do you receive any qualifying benefits? (Universal Credit, Pension Credit etc.)
Your recommended insulation measures
Your estimated results
Annual saving
£420
on your heating bills
Total install cost
£1,800
all recommended measures
Payback period
4.3 yrs
fastest of any upgrade
Carbon saving
1.2t
CO2 per year
Savings based on typical UK heating costs and Energy Saving Trust figures for each measure. Gas heating assumed at 6p/kWh. Actual savings vary by property age, construction type, current insulation standard and heating system. ECO4 eligibility subject to benefits status, EPC rating and supplier availability. ECO4 closes 31 December 2026. This tool provides estimates only and is not a quote.
📅 Last verified: June 2026 · ECO4 closes 31 December 2026 · Check gov.uk for current grants →
Estimates only — not a quote. Get a real quote free →