Ask three people what a project's contingency is for and you will often get three answers: unforeseen conditions, scope the owner forgot, or a cushion for bad estimating. That ambiguity is the problem. A contingency nobody has defined is a contingency somebody will spend.
Escalation and contingency are the two budget lines most likely to be set by habit — a round percentage carried forward from the last project — and most likely to be blamed when a project runs over. Both deserve better treatment than a default number.
They Are Different Things
Escalation is a forecast of cost movement over time. It answers: what will this work cost when it is actually bought, not what does it cost today? It is a function of the schedule and the market, and it applies whether or not anything goes wrong.
Contingency is a reserve against uncertainty. It answers: how much of this project do we not yet know? It is a function of design maturity, site knowledge, and complexity.
Conflating them hides both. A project that carries a healthy combined percentage can still be underfunded if the escalation assumption was built for an eighteen-month schedule and the project now runs three years.
Write Down the Assumption, Not Just the Number
The single most useful discipline in capital budgeting is recording why a number is what it is. For escalation, that means stating the assumed midpoint of construction, the annual rate applied, and the basis for that rate. For contingency, it means stating the design stage the estimate was based on and what specifically remains unknown.
This matters for two reasons. First, it makes the budget defensible to a board or funding body that will ask. Second, it makes the budget revisable: when the schedule slips six months, an owner with a documented escalation assumption can calculate the impact. An owner with an undocumented percentage can only argue about it.
Contingency Should Decrease, Deliberately
Contingency exists to cover unknowns, and unknowns shrink as design progresses. A contingency that is still at its original percentage at construction documents either was too low at concept or is quietly being treated as a slush fund.
The healthier pattern is a documented drawdown: a higher reserve at concept, stepping down at schematic design, design development, and construction documents, with each reduction justified by what has been resolved. Any reduction that is not justified by resolved scope is just moving money to spend elsewhere.
Name Who Controls It
Ambiguity about authority is where contingency actually disappears. Before construction starts, the agreement should state who may draw on contingency, at what threshold, and what documentation a draw requires.
A common and avoidable failure is contingency held inside the contractor's number with no owner visibility. That is not necessarily improper — some contract forms contemplate it — but an owner who cannot see the balance cannot manage it, and will learn it is exhausted at the moment they most need it. Contract structure determines this, which is why it is a pre-award decision rather than a mid-construction discussion.
Separate the Owner's Reserve
Contractor contingency covers construction unknowns. It does not cover the owner's own changes, consultant fees, permitting surprises, furniture, technology, moving costs, or the decisions leadership will make once they see the building taking shape.
Owners who hold no separate reserve of their own end up funding those items by cutting scope late — which is the most expensive time to cut, because the design is already paid for. A distinct owner's reserve, controlled by the institution and not visible to the construction contract, is what preserves the ability to say yes to something worth saying yes to.
Test the Budget Against the Schedule
Because escalation is a function of time, the budget and the schedule are the same document viewed two ways. Any schedule change should trigger a budget check, and any budget approval should state the schedule it assumes.
This is also the test that catches optimistic planning. A project whose approval schedule assumes permits in half the time the jurisdiction actually takes is not just a schedule risk — it is an underfunded budget, and the shortfall is already baked in on the day the board approves it. Mapping the approvals path early is a budgeting exercise as much as a regulatory one.
What Good Looks Like
An owner in control of these numbers can answer, at any point:
- What escalation rate is carried, over what period, and on what basis
- What contingency remains, who has spent it, and on what
- What the budget would become if the schedule extended by six months
- What reserve the institution holds separately from the construction contract
None of that requires sophisticated tooling. It requires that the assumptions were written down once, and revisited on a schedule — which is exactly the discipline that tends to lapse without independent owner-side oversight.
