Most subcontractors accept the GC's SOV because it comes with the subcontract package and changing it seems like a fight. It is a negotiation — and it is the most impactful cash flow conversation you have before a job starts.
Most subcontractors treat the SOV as administrative paperwork — a form to fill out for billing purposes. It is not. It is the document that determines when you get paid for work you have already performed. A contractor who accepts a GC-drafted SOV without negotiating is accepting the GC's preferred cash flow arrangement — which is almost always the opposite of the contractor's preferred cash flow arrangement.
The GC's draft SOV minimizes early billing — keeping more cash in the GC's hands longer — and maximizes back-end billing — where the contractor has completed the most work and has the most leverage to get paid. This is rational behavior from the GC's perspective. Accepting it without negotiation is also rational — for the GC. For the subcontractor, it is funding the GC's cash position with your own working capital for the first half of the project.
Mobilization, material procurement, rough-in, formwork, and underground work all happen in the first 30–40% of a project's timeline. They are also the most cash-intensive phases — labor and material costs go out before any significant billing event. If those phases carry 15% of contract value in the SOV but represent 35% of actual costs, you are funding a 20-point cash gap for the first third of the project.
Once the subcontract is signed, the SOV is fixed. A request to front-load billing after signing is a request to overbill, which is a different conversation entirely — and one the GC will almost always refuse. The entire SOV negotiation window is pre-execution. Missing that window costs real money on every billing cycle for the full duration of the project.
Before the GC sends their draft, submit yours. Anchor the negotiation around your cost structure. Your draft includes: mobilization (5–10% of contract value billable at job start), material procurement for any long-lead items (billable at deposit or delivery), early phase work weighted at actual cost percentage, and cleanup and demobilization as a separate last line. Once your draft is the starting point, the negotiation is over how much you move from it — not how far you can move the GC off their position.
You are not asking for favorable billing. You are asking for billing that accurately reflects when costs are incurred. Mobilization costs occur at job start. Switchgear deposits go out before delivery. Formwork is installed before concrete is poured. A schedule of values that does not reflect these cost timings is inaccurate — not just unfavorable. That framing changes the negotiation from a fight over cash flow to a conversation about accurate financial reporting.
Before the negotiation: calculate the cash impact of the GC's draft versus your draft over the first 90 days. What is the maximum cash hole you can fund from operating cash without drawing on the LOC or factoring invoices? That number defines your minimum acceptable SOV position. If the GC will not move to a position within that range, you know before the job starts that the SOV structure will require external financing — and you can price that financing into the bid accordingly.
If the GC will not accept your mobilization line item, ask for a material procurement line instead — often an easier yes because it is tied to a specific documented cost (deposit invoice). If they will not accept material procurement, ask for early-phase milestones weighted at actual cost percentage. Not every negotiation produces everything on your list. Knowing which line items have the highest cash flow impact tells you where to focus your negotiating energy.
| Trade | Must-Have Lines | Target Mobilization % |
|---|---|---|
| Civil | Mobilization, Equipment Mobilization, Phase by Unit Price Type | 5–8% |
| Concrete | Mobilization, Formwork & Shoring, Rebar, Placement by Pour | 5–8% |
| Electrical | Mobilization, Material Procurement, Rough-In by Phase | 5–10% |
| Mechanical/Plumbing | Mobilization, Equipment Procurement, Underground, Rough-In | 5–8% |
| Masonry | Mobilization, Scaffold Setup, Material Procurement | 3–6% |
| Underground Utility | Mobilization, Equipment Mobilization, Trench by Phase/Depth | 5–10% |
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