Contingency Budget — definition
Reserve of funds set aside within a project budget to cover identified and unidentified risks, cost estimate uncertainty and unforeseen changes during execution.
Contingency is typically calculated as a percentage of base estimated cost, with the percentage decreasing as the project moves from early concept stages to detailed design, reflecting reduced estimate uncertainty. It is distinct from management reserve, which covers scope changes rather than estimate uncertainty.
Why it matters to industrial buyers
Adequate contingency protects a project from being derailed by normal estimating uncertainty, while excessive contingency can make a viable project appear unaffordable.
Key reference points
Typical range
Contingency is commonly set in the range of 10-30 percent of base cost at feasibility stage, narrowing as design matures.
Commonly confused with
Management reserve
Contingency covers estimating uncertainty within defined scope; management reserve covers changes in scope or unforeseen events outside the original plan.
How it is used in practice
The project budget includes a 15 percent contingency to cover estimating uncertainty at the feasibility stage.
Frequently asked questions
Does contingency get spent automatically?
No; contingency is drawn down only against justified cost items and is typically managed under formal change control.
Who controls release of contingency funds?
Release is commonly governed by the project sponsor or a project control board, following documented justification.
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Related terms
Class 5 Cost Estimate
Earliest and least detailed AACE International cost estimate classification, typically accurate to a wide range and used for initial screening of concept-stage industrial projects.
Feasibility Study
Structured assessment of the technical, commercial, financial and operational viability of a proposed industrial project before significant capital commitment is made.
Business Case
Structured document that justifies a proposed capital investment by presenting its objectives, costs, benefits, risks and expected financial return to decision-makers.
Capital Expenditure (CAPEX)
Funds a company commits to acquiring, upgrading or extending the useful life of long-term physical assets such as machinery, buildings or production lines.
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Reference content only. Global B2B Group is independent of equipment manufacturers and financing institutions; definitions are provided for education and do not constitute engineering, financial or legal advice.