Roof Replacement Sinking Fund Calculator

Build a sinking fund that covers your next roof replacement without new debt. Enter the estimated project cost and how many years you have left before replacement is due. Optionally include an annual yield if the cash will sit in a high-yield account. The calculator returns the required monthly contribution, total deposits, and the interest earned by the time the roof is replaced.

All-in quote for tear-off, materials, labor, permits, and disposal.
How many years you have before the roof must be replaced.
Defaults to 1.5% to reflect a high-yield savings account.

Assumes fixed monthly contributions and a stable annual yield. Recalculate if project scope or interest rates change.

Examples

  • $18,500 roof in 7 years earning 1.5% ⇒ Monthly contribution: $209.02 • Total contributions: $17,557.29 • Interest earned by replacement date: $942.71
  • $24,000 roof in 10 years with 0% yield ⇒ Monthly contribution: $200.00 • Total contributions: $24,000.00 • Interest earned by replacement date: $0.00

FAQ

What if I already have money saved?

Subtract your existing roof reserve from the projected cost before running the calculator. The result will show the monthly contribution needed for the remaining gap.

How should I handle inflation on roofing materials?

Increase the replacement cost input by your expected inflation rate each year or revisit the plan annually to adjust for updated bids.

Can I model biweekly contributions?

Yes. Multiply the monthly output by 12 and divide by 26 to see the biweekly transfer amount that matches the same annual savings.

Additional Information

  • Monthly contribution assumes end-of-month deposits with compounding at the selected annual yield.
  • If your reserve earns higher returns, increase the yield input—small changes materially shift required savings.
  • Consider adding 10–15% contingency to the replacement cost to absorb code upgrades or decking repairs discovered during tear-off.

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