How it works
Use a planning contingency of 10%, 15%, 20% or 25% by project type, unless you enter your own rate.
Simple example
A $5,000 moderate renovation at 20% contingency plans for $6,000.
Budget & Cost
Project Budget Buffer Calculator
Add a contingency to a project budget.
Advertisement space
Common question
Is the buffer enough?
Unexpected work varies widely; get detailed quotes for major work.
This is a planning estimate. Check product instructions, dimensions and site conditions before purchasing or building.