By Louis du Plessis
CEO Pollen Finance | September 6, 2026 | 4 min read
Construction businesses can manage supplier costs by forecasting project cash flow, negotiating payment terms, matching supplier commitments to project milestones, controlling material waste and keeping enough working capital available to bridge payment delays.
Funding may also be used to cover short-term supplier costs where customer payments arrive later than project expenses.
Construction businesses live in the gap between what a project costs today and what the customer pays tomorrow. And suppliers sit right in the middle of that gap.
A project cannot simply stop because the client has not paid yet. That is why managing supplier costs is one of the most important cash flow disciplines in construction.
Construction projects often require significant upfront spending.
Costs may include:
But revenue may arrive only after work has been completed, inspected or certified. That creates a timing mismatch.
Construction margins can be vulnerable to changing input costs. A project may be quoted today and delivered months later. If material prices rise during that period, the expected margin can quickly shrink.
That is why quotes need to consider price validity periods, contingencies, and currency exposure for imported materials. Revenue matters, but protecting margin matters just as much.
Supplier terms can significantly affect project cash flow. Useful arrangements may include 30- or 60-day payment terms, staged payments, or volume pricing.
Strong supplier relationships create flexibility, but that flexibility depends on paying suppliers reliably.
One of the best ways to manage project cash flow is to align money going out with money coming in. Where possible supplier deposits should align with customer deposits, and subcontractor payments should reflect completed work. The aim is to avoid funding an entire project long before the related revenue is due.
Cash flow can disappear through inefficiency. Small percentages of waste become significant across a large project. Businesses should monitor over-ordering, theft, and unused materials.
Managing supplier costs is not only about negotiating better prices. It is also about making sure what you buy is actually used productively.
There are times when even a well-managed construction business needs additional working capital. For example, a contractor completes one stage of a project. The payment certificate has been approved, but the customer will only pay in 30 days. Meanwhile, materials for the next stage need to be ordered now. Working capital can help bridge that gap.
Our guide Funding Delayed Payments in Construction looks specifically at this challenge.
When assessing a construction business, funders may consider:
Confirmed work matters, but so does the business’s ability to deliver that work profitably.
Material inflation can quickly reduce project profitability.
Early payment may reduce flexibility unless it earns a worthwhile discount.
More work means more supplier commitments. Growth can create cash flow pressure very quickly.
A single supplier creates concentration risk.
Poor material control can turn a profitable project into an unprofitable one.
Construction is often described as a project business, but it is just as much a cash flow business. A contractor may have a full order book and still struggle if supplier payments and customer receipts do not align.
That is why supplier management matters. Not just because materials are expensive, but because every supplier commitment affects the amount of cash available to keep the next stage moving.
The strongest construction businesses understand that winning the project is only the beginning. Managing the money through the project is what allows the business to keep building.
About the author
Louis du Plessis is the CEO of Pollen Finance, helping established South African businesses access funding to seize growth opportunities. He writes about business funding, cash flow and entrepreneurship, drawing on over a decade of experience working alongside SMEs.
