Practical completion is a date that pays

Practical completion is the point at which the works are complete enough to be used for their intended purpose, with only minor items outstanding. On a New Zealand contract it is certified by the Engineer to the Contract, and that certificate is one of the most valuable pieces of paper on the job.

What the certificate triggers

The date matters because so much hangs off it. Getting the certificate issued on the right date, and no later, protects the contractor on several fronts at once.

• Damages stop. Liquidated damages cannot run past practical completion, so the certified date closes that exposure.
• The defects period starts. The clock on the defects liability period begins, and with it the run to final retention release.
• Retention releases. The first tranche of retention falls due, claimed through a payment claim like any other sum.

Minor items are not incomplete works

The distinction that causes the most friction is between minor outstanding items and works that are genuinely incomplete. Practical completion tolerates a snagging list of small matters that do not stop the works being used. It does not tolerate significant work still to be done. The Engineer judgment on that line decides whether the certificate issues, so keep the outstanding items genuinely minor.

It sits on top of the extension

Practical completion is measured against the date for completion, and that date is whatever the extensions of time have made it. If an extension is outstanding, the contractor can be certified complete on a date that still looks late against the original programme but is on time against the adjusted one. Settle the extensions and the practical completion date reads correctly.

The discipline

Push for the certificate on the date the works actually reach completion, keep the snagging list short and genuinely minor, and claim the retention release the moment the certificate issues. Where the Engineer withholds the certificate on grounds you dispute, adjudication under the Construction Contracts Act 2002 is available. The date is worth fighting for, because everything downstream is counted from it.