Differential

Materials or equipment stored at your job site but owned by the supplier until you use them. You only pay when items are consumed, reducing upfront capital tied up on remote projects. Common for frequently used consumables like fittings, gaskets, and PPE on long-duration field contracts.

A variable fee added to invoices to recover fuel cost fluctuations on equipment-heavy jobs. Subcontractors often tie it to a published index, such as the weekly rack price. Review prime contracts carefully — some owners cap or exclude surcharges entirely.

The seasonal period when thawing ground and flooding restrict heavy equipment access to remote job sites. For subcontractors, it typically means project delays, suspended haul routes, and reduced billable work. Plan cash flow carefully to cover the slow period.

A signal that a client or project poses serious financial or operational risk to a subcontractor. Common triggers include late payments, scope disputes, or sudden crew access restrictions. Recognising these early helps subcontractors protect revenue and avoid costly disputes.

Expenses already built into a contract rate that cannot be billed separately, such as mobilisation, PPE, or overhead. Subcontractors must identify these upfront to avoid absorbing unrecovered costs. Missing embedded costs during bid review is a common source of margin loss.

Payment terms indicating when payment is due after invoice date. Net 30 means payment within 30 days. Many operators use Net 45 or Net 60, extending subcontractor cash cycles.

What Happens to Subcontractor Billing When a Project Stalls, Goes Over Budget, or Never Gets Commissioned

You did the work. The project was cancelled, shelved, or never activated. Here is what subcontractors need to know about billing rights, legal remedies, and how to get paid when no one wants to discuss the invoice.

Post-Completion Warranty and Punch Work: Protecting Your Margins After the Job Ends

Warranty walks, punch lists, and post-completion callbacks eat into subcontractor margins. Learn how MSA warranty clauses work, when you can push back on mobilization costs, and how to document your way out of disputes.

Mechanic's Lien Rights for Subcontractors: What to Do When You're Not Getting Paid

A practical guide to mechanic's lien and materialman's lien rights for oilfield and construction subcontractors in Texas, Oklahoma, and Alberta — deadlines, filing steps, and leverage tactics.