All Insights
Client Guides2026-05-12· OGK Contracts Desk

Milestone-Based Billing: The Transparency Every Client Deserves

Milestone-Based Billing: The Transparency Every Client Deserves

A construction contract lives or dies by its payment schedule. At OGK, every contract begins with a mobilisation advance of 10–20%, secured against a bank guarantee for larger works. From there, billing follows physically verifiable milestones — foundation completion, slab cycles, brickwork, finishes — each certified by joint measurement before an invoice is raised.

Why does this matter? Because it aligns incentives. You never pay ahead of progress, and we are never financing the project from thin air. Retention of 5% per bill, released after the defect liability period, gives you leverage on quality long after handover.

Our client portal takes this further: every milestone, invoice, advance adjustment and receipt is visible in real time, with photographs of the certified work stage attached to every bill. If a variation order changes scope, its cost and schedule impact is approved by you before a single brick moves.

The result is a project where financial surprises simply cannot hide. That is what we mean when we say we build trust before we build structures.