Stage Payment

A stage payment is an agreed sum invoiced when a project reaches a defined milestone, rather than billing the full amount at the end of the job. Stage payments are common in construction, AV installation, solar installation, and other project-based businesses where work spans weeks or months and the business needs cash flow to fund ongoing costs.

How Stage Payments Are Structured

A stage payment schedule is agreed before work begins and written into the contract or order confirmation. Each payment is tied to a specific milestone - not a calendar date - so the trigger is observable and verifiable by both parties.

A typical construction project might use a structure like this: 20% deposit on contract signature, 30% on completion of groundworks, 30% on structural completion, 15% on practical completion, and 5% retained during the defects liability period. For a solar installation, the milestones might be: deposit at survey sign-off, 50% at equipment delivery, and the balance on commissioning. The exact splits depend on the project type, contract value, and what the customer agrees to upfront.

The key principle is that milestones must be specific enough that both sides agree when one has been reached. Vague milestones create disputes. Specific ones - "on delivery of all major equipment to site" - do not.

Why Stage Payments Matter for Cash Flow

Project-based businesses carry significant upfront costs: labor, materials, equipment, and subcontractor payments often fall before the customer pays a single invoice. Without stage payments, a business completing a three-month installation could fund the entire job from its own reserves and invoice once at the end. For most SMBs, that model is unsustainable at any real project scale.

Stage payments shift some of that risk back to the customer. A deposit covers early material procurement. Mid-project payments cover labor and ongoing costs. The final payment covers margin and any retention release. When invoices are raised promptly at each milestone - not batched at month-end - the business maintains a predictable cash position throughout.