Window Replacement Cost and Savings Calculator

Estimate installed window cost, affected energy savings and payback. The tool estimates a low, expected, and high annual energy-saving range from the window and building inputs, subtracts confirmed rebate from installed cost, and projects cumulative savings through your horizon. It then shows payback and net present value for the selected case.

With the values entered, the calculator estimates expected annual energy savings of $262. This scenario uses province or territory set to Ontario, number of windows of 2, contractor quote or expected cost of $2,800, and annual space-heating cost of $2,200. The supporting results show net installed cost of $2,800 and low annual savings of $183, which makes the main drivers easier to compare. Energy-only payback reaches year 11. Compare the expected case with the low and high lines instead of treating one savings number as certain. If payback extends beyond your planned move date, make the decision using comfort, maintenance, building condition, and quote quality as well as energy savings.