DSO (Days Sales Outstanding)

The total value of contracted work that has been awarded but not yet completed. A healthy backlog signals steady upcoming revenue and helps subcontractors plan crew deployment and equipment needs. Thin backlogs often signal the need to ramp up bidding activity.

A formal written amendment to an existing contract that modifies scope, cost, or schedule. Subcontractors should never perform out-of-scope work without a signed change order. Undocumented changes are a leading cause of unpaid invoices and disputes.

Invoicing for work completed to date on a longer project, rather than waiting until project completion. Helps subcontractors maintain cash flow on extended jobs.

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.

A disconnect between what a subcontractor quoted and what the client expects to pay for. This often surfaces during invoicing when scope, rates, or billing terms were not clearly agreed upon upfront. It can delay payments and strain relationships with prime contractors.

A contract clause that adjusts your billing rate when diesel or fuel prices shift beyond a set threshold. It protects subcontractors from absorbing sudden fuel cost spikes on long-term or remote field assignments. Negotiate the trigger percentage and index reference before signing.

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