How long until your retrofit pays for itself?
Plug in your project cost, the rebates you've stacked from the grant finder, and your expected annual energy savings. We project your break-even year and 25-year ROI.
Rebates first
Subtract every grant, tax credit, and utility rebate from your project cost before calculating payback.
Use real bills
Multiply your average monthly energy bill by 12 and apply the % savings your contractor estimates.
Inflation matters
Energy costs rise faster than inflation. A modest 3% assumption can swing 25-year ROI substantially.