Contingency is one of the most abused words in construction.
Owners are told to “carry more” without being told why, for what, or when it should go away. The result is either a dangerously thin budget or unnecessary capital sitting idle.
In metal building construction, contingency should be calculated, not guessed.
This article explains how contingency actually works, what it should cover, and how disciplined planning allows owners to shrink it responsibly.
What Contingency Is Meant to Cover
Contingency exists for unknowns, not mistakes.
Legitimate contingency covers:
- Minor unforeseen site conditions
- Small scope refinements as use evolves
- Market fluctuations within a reasonable range
- Field adjustments that couldn’t be known earlier
It should NOT cover:
- Missing scope
- Incomplete design (including geotechnical review)
- Poor coordination
- Known risks ignored early
If contingency is being used to absorb predictable issues, something upstream failed.
Why PEMB Projects Need a Different Contingency Approach
Because PEMB projects evolve through delegated design, risk reduces in stages:
- Concept planning
- Preliminary engineering
- Final engineering
- Fabrication
- Erection
Contingency should shrink as each stage removes uncertainty.
Static contingency is a red flag.
Realistic Contingency Ranges (Explained)
Instead of fixed percentages, think in risk bands.
Early Planning (Concept Only)
Risk is high because:
- Site data is incomplete
- Engineering is conceptual
- Permitting unknowns remain
Typical range: 10–15%
Post-Engineering / Pre-Fabrication
Risk drops because:
- Structural systems are defined
- Steel weight is known
- Major scope decisions are locked
Typical range: 5–8%
Post-Permit / Fabrication Complete
Risk drops further:
- Design is approved
- Site scope is clearer
- Market exposure narrows
Typical range: 3–5%
Turnkey, Coordinated Projects
When design, fabrication, and erection are aligned:
- Most unknowns are eliminated
- Remaining risk is operational, not structural
Contingency can often be reduced below traditional norms.
How Delivery Method Impacts Contingency
Bid-build pushes contingency onto the owner because:
- Coordination happens late
- Responsibility is fragmented
- Risk is discovered after award
Design-build retires risk earlier by:
- Aligning design and construction
- Forcing decisions sooner
- Eliminating scope gaps
This is why design-build budgets often feel “tighter” — they’re simply more honest and complete.
Managing Contingency Like a Professional Owner
Sophisticated owners:
- Track contingency separately from budget
- Release contingency as risks are retired
- Don’t allow contingency to mask poor planning
- Reallocate unused contingency intentionally
Contingency is not insurance. It’s a temporary reserve.
The Most Expensive Contingency Mistake
The biggest mistake owners make is assuming contingency protects them from everything.
It doesn’t.
Contingency cannot save a project from:
- Bad assumptions
- Poor coordination
- Late decisions
Only planning can do that.
Final Thought
The goal is not to carry more contingency.
The goal is to need less of it.
Projects that invest time early almost always cost less overall — not because they’re lucky, but because uncertainty was addressed before it became expensive.
Planning a metal building project?
Schedule a short review to identify risks before they become change orders or delays.
Prefer to learn first?
Download our free guide, From Dirt to Done, for a step-by-step overview of the metal building process.