What a Trial Budget Is Made Of

Part of Clinical Project Management (PM) Training: Budget, Resourcing and the Cost of Delay.

About 1 minutes. Free, in your language, no account needed.

Three kinds of money behave differently

Per-participant costs. Site payments per visit, laboratory tests, imaging. These scale with enrollment and are the easiest to forecast once the rate is known.

Fixed costs. Protocol development, system builds, regulatory submissions. Incurred whether or not anyone enrolls.

Time-driven costs. CRO project management, system licenses, storage, the project team. These accrue per month the trial is open, and they are the reason a delay costs money even when nothing else changes.

Confusing the third with the first is the most common budgeting error. A six-month extension with no extra participants still costs six months of everything time-driven.

Site budgets and what sites actually absorb

A site budget that ignores screen failures, re-consents after an amendment, or unscheduled visits pushes real costs onto the site. Sites absorb it for a while and then enrollment quietly slows, because the trial has become unaffordable to run.

Pay for screen failures. Pay for the amendment work. It is cheaper than the recruitment you lose.

Where budgets break

Amendments nobody costed. Extra monitoring visits triggered by a site problem. Additional sites added to rescue enrollment, each carrying full activation cost. An extension, which carries every time-driven line.

None of these is unforeseeable. All of them are routinely absent from the original budget.

Forecast, do not just track

Spend to date is history. What matters is projected spend at completion, updated when the enrollment forecast or the end date moves. A budget report that shows only what has been spent cannot tell anyone whether the trial is affordable.