practical completion
In a construction contract, the point at which the property can be occupied and used. Typically, half of the retention monies are released, the contractor's potential liability for liquidated damages ends and the defects rectification period begins.
practical completion: when the site hands over to the client
Practical completion is the contractual moment when a construction project transitions from active building to occupation and use. It is not the same as finish date or handover; it is a formal gate defined in the contract that triggers financial and legal consequences for both contractor and client. Most standard contracts (JCT, NEC, FIDIC) recognize practical completion as a distinct event, typically marked by a certificate issued by the architect, engineer, or contract administrator.
The core question practical completion answers is: can the client move in and use the building for its intended purpose, even if minor work remains? This means structural soundness, services (power, water, heating), safety systems, and access are all functional. Snagging work, decorative finishes, and adjustments to doors or windows are expected to be outstanding. The threshold is fitness for use, not perfection. A building might reach practical completion with 5 to 10 percent of the contract value still spent on defect correction.
Financial and contractual consequences
Practical completion triggers three immediate changes. First, half of the retention money (typically 5 percent of contract value, withheld from monthly payments) is released to the contractor. Second, the contractor ceases to accrue liquidated damages for delay; if the project runs over, no further penalties apply after this date. Third, the defects liability period (DLP) begins, usually running 12 months. During the DLP, the contractor remains responsible for fixing defects but is not paying interest on withheld funds or accumulating damages.
The certificate of practical completion is the evidence. Once issued, the burden of care shifts from the contractor to the client; insurance liability, security, and maintenance become the client's responsibility. This is why the date is heavily negotiated. A contractor wants early practical completion; a client may resist certification if work feels incomplete. Disputes often turn on whether snagging is genuinely minor or amounts to unfinished work that prevents use.
Practical completion is a creature of contract; it exists because standard forms define it. Without an explicit contract clause, the terms drift into ambiguity and courts must infer the parties' intent from behavior and correspondence. The concept assumes a staged handover model, which suits most building work, but breaks down in process plant or infrastructure where commissioning and gradual ramp-up are normal. In those sectors, contracts may use alternative gates such as mechanical completion, substantial completion, or provisional completion.