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Window Replacement Payback Estimator

Estimate the simple payback period in years for a window replacement project from its total cost and the estimated annual energy savings.

Screening estimate only.A licensed window installer and your local building code are authoritative for final sizing, egress compliance, and product selection. Confirm every result with a pro and your local code.

Screening result

Enter project cost and annual savings to estimate payback.

Fine Print and Sources

Screening estimate only. These tools use only the values you enter and simple planning math. A licensed window installer and your local building code are authoritative for final sizing, egress compliance, product selection, and pricing. Confirm every result with a pro and your local code.

This is a simple payback: project cost divided by annual energy savings, with no discounting or inflation. It counts energy savings only. It does not value comfort, noise reduction, reduced drafts, financing cost, or any change in home value, which are often the larger reasons to replace windows. Energy savings vary with climate, the windows you replace, and installation quality, so treat the result as a screening estimate.