Owner education for clearer commercial construction decisions.
Working definition
Contingency
A controlled reserve for uncertainty that remains after reasonable planning and investigation.
An allowance, by contrast, assigns an estimated amount to a known item whose final selection or quantity is not complete.
Decision table
Give each reserve one job
| Reserve | Purpose | Typical control |
|---|---|---|
| Design contingency | Scope development before documents are complete | Owner and design team |
| Construction contingency | Defined field uncertainty and minor unknowns | Contract dependent |
| Owner contingency | Owner decisions and broader project risk | Owner |
| Estimating contingency | Uncertainty in an early estimate | Estimator |
| Schedule contingency | Time uncertainty | Project team |
| Escalation allowance | Potential price movement before procurement | Owner and estimator |
Take to the meeting
Eight controls to write into the plan
- Who controls the reserve?
- What uses are permitted?
- Does unused money return to the owner?
- Is it inside or outside the construction price?
- Are markups applied when it is used?
- What documentation is required?
- How is use shown in cost reports?
- When can the amount be reduced?
Signal check
Healthy contingency behavior
Disciplined
Every draw identifies cause and owner
Forecasts show committed and remaining amounts
Known scope is moved into the base budget
Unused reserves remain visible
Risk declines as information improves
Uncontrolled
The reserve is treated as available scope
Multiple parties assume they control it
Allowances and contingency are blended
Use is reported after commitment
The budget depends on spending every dollar
Questions, answered
Contingency myths
Should contingency always be a fixed percentage?+
No. A percentage may be a starting convention, but the amount should reflect design maturity, existing conditions, procurement timing, complexity, and the owner's risk tolerance.
Does unused contingency belong to the contractor?+
That depends on the contract. Ownership, permitted use, reporting, and final disposition should be stated explicitly.
Technical references
Sources and scope
Keystone uses these resources to frame owner education. This guide is general information and does not replace project-specific review by qualified design, construction, roofing, code, legal, or financial professionals.