Float is the most valuable thing in a CPM schedule that nobody put a price on. Who gets to use it decides who absorbs the next delay. Most owners never read the clause that answers the question until it has already cost them.

The short answer is that float ownership depends on the contract, and most contracts either assign it to the project as a shared resource or say nothing, which courts in many venues read as the same thing. The longer answer is where the money is.

What float is, and the two kinds that matter

Total float is the number of days an activity can slip without moving the project completion date. Free float is the number of days it can slip without moving its own successor. Float is not a thing anyone physically owns. It is a calculated property of the schedule network, the slack that exists because some paths are shorter than the critical one.

That is exactly why ownership is contested. You cannot hold float in your hand, so the contract has to say who is allowed to spend it.

The three positions on who owns float

Contracts that address float land in one of three places.

Float belongs to the project. It is a shared resource, available to whoever needs it first, first come first served. This is the most common position and the most common default when the contract is silent.

Float belongs to the owner. Any float in the schedule is the owner’s to allocate, which protects the owner from a contractor consuming the entire buffer early.

Float belongs to the contractor. The contractor built the schedule, so the slack is theirs to manage and to monetize in a delay claim.

Most well-drafted contracts pick the first. Most owners never check which one their contract picked.

Why float ownership decides who pays for delay

The reason this matters is sequencing, and it is the part that catches owners off guard.

Picture a project with twenty days of total float on a key path. The contractor slips early, for reasons that are entirely its own responsibility, and consumes all twenty days. The schedule still shows completion on time, so nobody raises an alarm. Then an owner-caused delay lands. A late submittal approval, owner-furnished equipment that missed its date. Now that owner delay pushes the completion date, because there is no float left to absorb it.

On paper, the owner’s delay is the critical one. In reality, the contractor ate the cushion that would have covered it. Whoever owns the float decides who carries that cost. If float belongs to the project and the contractor spent it first, the owner is exposed. If float belongs to the owner, the contractor’s early consumption is on the contractor.

Float games

Because float is valuable and contestable, schedules get built to manipulate it.

Float sequestration is the practice of hiding float so it cannot be consumed by the other side. Preferential logic, artificially extended activity durations, and unjustified constraints all do this. The contractor manufactures a critical path that protects its own activities and exposes the owner’s. Negative float, which appears when a constraint or a slipped activity forces the schedule past its required finish, is often the first visible symptom that someone has been managing float rather than managing the work.

A schedule with no float anywhere is not a tight schedule. It is usually a schedule that has been engineered so the contractor controls every delay conversation before it happens.

What owners should do

Float is governable, but only before it is gone.

• Address float ownership explicitly in the contract. Name it. Project-owned, owner-owned, or contractor-owned, but do not leave it silent.
• Monitor float erosion in the updates. Track how total float on key paths changes month to month. Rapid float consumption early is a warning, not a comfort.
• Do not assume the buffer is yours. If the contract says float belongs to the project and the contractor spends it first, that is the contractor exercising a right you gave it.

Frequently asked questions

Who owns float in a construction schedule? It depends on the contract. The three positions are project-owned (shared, first come first served), owner-owned, and contractor-owned. Silence usually defaults to project-owned in practice.

What is the difference between total float and free float? Total float is how long an activity can slip without delaying the project finish. Free float is how long it can slip without delaying its immediate successor.

What does negative float mean? It means the schedule is calculating a completion later than a required date or constraint. It signals the project is behind against that date, or that a constraint is distorting the network.

Can a contractor use all the float? If the contract makes float a shared project resource and the contractor consumes it first, generally yes. That is precisely why owners who care about delay exposure address float ownership in the contract rather than leaving it to chance.