Should I Repair My Windows or Replace Them?

The rule: the 25% Rule, per window.

If fixing a window costs a quarter or more of what replacing it costs, replace it. Under a quarter, repair it. And if 3 or more windows are failing at once, replace the set — piecemeal repairs on dying windows just spread the same bill across several years.

Windows fail in groups. They are all the same age, they face the same weather, and one fogged seal at year 18 means the others are not far behind. A $200 sash repair on one window is fine; the same repair on five windows is a down payment on replacements you will need anyway.

Windows last about 20 to 25 years. At 25 or older, replace them regardless — seals, frames, and efficiency are all past their prime, and new windows cut heating and cooling bills in a way repairs never will.

Educational estimate only. Based on YOUR repair quote per window, replacement cost per window, number of windows needing work, and age of windows in years you enter. Uses 25% Rule, per window: if fixing costs a quarter or more of replacing, replace it. Under a quarter, repair it. And if 3 or more windows are failing at once, replace the set — piecemeal repairs on dying windows just spread the same bill across several years. 25+ years old, replace regardless.

Frequently Asked Questions

What is the 25% rule for windows?

If fixing a window costs a quarter or more of what replacing it costs, replace it. Under a quarter, repair it.

When should I replace instead of repairing?

If 3+ windows are failing at once, repair is over $500 per window, or windows are 25+ years old, replace the set. Windows last about 20 to 25 years.

Why do windows fail in groups?

They are all the same age and face the same weather — one fogged seal at year 18 means the others are not far behind, so piecemeal repairs just spread the same bill across several years.

When should I ignore this rule and talk to a professional?

This is educational only, not professional advice — get quotes from licensed, reputable contractors.

Not quite your situation?

Try one of these decisions instead:

• Should I Repair My Roof or Replace It?
• Should I Repair My Furnace or Replace It?
• Should I Replace My Mattress or Keep It?