Roof costs
Roof repair versus replacement annual cost calculator
Compare repair and replacement annualized costs. A homeowner has quotes and an expected service life for each option.
Try the calculation
Compare only the annualized arithmetic from costs and service-life assumptions you enter. This is not a repair-or-replace recommendation.
Adjustable example. Change these illustrative inputs to match your task, then recalculate. Reset restores the example and its result.
Understand the result
How this calculation works
Annualized comparison divides each entered cost by its expected service life.
Steps
- Enter repair cost and life, then replacement cost and life.
- Use the same currency basis and a stated planning horizon.
The form starts with the worked example below. Change its values and selections to match your task; Reset restores the example.
Formula
annual repair = repair cost ÷ repair life; annual replacement = replacement cost ÷ replacement life.
Variables and units
- Repair quote ($)
- Required. Use a positive value. Starting example: 1200. Replace it for your task.
- Expected repair life (years)
- Required. Use a positive value. Starting example: 4. Replace it for your task.
- Replacement quote ($)
- Required. Use a positive value. Starting example: 10000. Replace it for your task.
- Expected new-roof life (years)
- Required. Use a positive value. Starting example: 25. Replace it for your task.
What the result means
This is a comparison of assumptions, not a financial forecast or a recommendation to delay work.
Worked example
Inputs: Repair quote = 1200; Expected repair life = 4; Replacement quote = 10000; Expected new-roof life = 25.
Calculation: $1,200 ÷ 4 = $300/year; $10,000 ÷ 25 = $400/year; repair is lower by $100/year.
Result: 300 $/year repair.
Frequently asked questions
Does it include inflation?
No.
Does a lower annual number mean repair is better?
Not by itself; scope, safety and condition still matter.
Can service life be guaranteed?
No, enter an assumption you can explain.