Retention in Construction: Protecting Cashflow Without Damaging Relationships

Retention is a widely used tool in construction contracts: the employer withholds a portion of payment (commonly 3 ‑ 5%) as security for defects and incomplete works. While this protects clients, the impact on contractor cashflow and relationships can be significant if the practice is mis‑managed.

For contractors, the withheld sum means less working capital to pay labour, suppliers or plant. If the retention remains with the client after practical completion and during the defects period, profit margins can be squeezed and cashflow stressed. From the client/developer viewpoint, the retention is assurance that the contractor will return and rectify any defects or snags.

The key to retaining trust between parties is transparency and agreed milestones. A Quantity Surveyor (QS) supports this by analysing the contract wording at tender, verifying retention percentages, scheduling release milestones, tracking defects liability periods and flagging any unreasonable or delayed release. For example: A well‑structured contract may release half the retention on practical completion and the remainder at the end of the defects liability period with clear criteria. Delays in release or unclear criteria often lead to disputes.

At KQS Ltd we emphasise early discussion around retention: setting realistic percentages, ensuring the contractual language matches the budget and programme, documenting sign‑off criteria for release, and monitoring the defect list throughout the liability period. Good practice means retention is not left sitting indefinitely; a situation that damages cash‑flow, relationships and future tender margin.

In conclusion: retention is not the enemy. When managed properly it protects the client and still allows the contractor to maintain healthy cash‑flow and margin. The difference lies in clarity, agreed release triggers, and proactive monitoring. A professional QS ensures that retention is fair, visible and predictable. A key element of commercial and financial stability on site.

KQS – Supporting contractors and developers with structured, fair retention management across every project stage.