Contingency Per Square Foot Calculator

Contingency absorbs the unknowns — field conditions, material price moves, spec clarifications. The right contingency percent depends on project type. Ground-up needs less; adaptive reuse needs a lot. This calculator sizes contingency and compares against benchmarks.

Project SF

Hard cost

Contingency % of hard cost

Project type

Total contingency

$450,000

Contingency / SF

$22.50

Hard cost / SF

$225.00

Benchmark min %

Benchmark max %

12%

Contingency within range

Yes

How the math works

Contingency sizing depends on project type. Ground-up: 3-8% (good drawings, known conditions). Moderate renovation: 5-12%. Heavy renovation or adaptive reuse: 8-20%. Lenders typically require minimum contingency; over-under allocation is a common pro forma mistake.

Contingency is separate from change orders. Contingency absorbs unknowns (field conditions, code changes). Change orders are additions to scope — they increase contract value and typically get their own budget line.

How to Use

Enter project SF and hard cost.
Enter contingency as % of hard cost.
Pick project type — new, moderate, or heavy renovation.
Read per-SF contingency and whether it's within benchmark.

Frequently Asked Questions

Lender contingency rules?

Most construction lenders require 5-10% contingency minimum on new construction. Value-add loans often 10-15%. Adaptive reuse can require 15-20%. Check the loan commitment carefully.

Contingency vs change orders?

Contingency is set aside for unknowns within agreed scope. Change orders are scope additions — new square footage, upgraded finishes. Change orders typically need separate owner approval and can blow contingency.

Can I spend unused contingency?

At close-out, unused contingency flows back to equity. Smart owners don't declare contingency spent until actually drawn — savings compound into project profit.