PROCUREMENT TIMING IS A CASH FLOW DECISION.
Material procurement timing directly controls when cash leaves and when billing recovery arrives. When you buy determines when the gap opens. When you structure the SOV determines when it closes. A 13-week cash flow forecast that doesn't map procurement deposits, lead times, stored materials billing, and delivery-to-installation lag by job isn't a forecast — it's a guess with a spreadsheet.
Most subcontractors think of procurement as an operations decision. Buy when you need it, price when you can. But every procurement decision is also a cash flow decision — and the cash consequences of buying at the wrong time, without the right billing structure, compound across every active job simultaneously. This page explains how procurement timing works as a financial lever and how CFOS maps it into the forecast before the POs go out.
PROCUREMENT CREATES CASH GAPS. PLANNING CLOSES THEM.
When material is ordered, cash leaves — through a deposit, a net-30 payment, or a credit draw. That outflow has no corresponding inflow until the material is installed, inspected, and billed on a pay application. On a commercial subcontract job, the gap between procurement outflow and billing recovery can run 30 to 120 days depending on the material type, the owner's SOV structure, and the GC's payment terms.
That gap is not a problem if it's planned for. It becomes a problem when it's not visible in the cash forecast — when procurement decisions are made in a vacuum, without a parallel view of what the cash position will be at the point when the deposit is due, the delivery arrives, and the payroll run overlaps with a slow week on billing collection.
The subcontractors who manage this well treat procurement timing as a financial decision, not just an operations decision. They know their lead times by material category. They know which items require deposits vs. full payment on delivery. They know which items qualify for stored materials billing and which don't. And they map all of that into the 13-week forecast before committing the purchase order.
The key insight: Early procurement protects bid prices. Delayed procurement avoids cash gaps. The optimal procurement timing decision lives somewhere between those two — and it's different for every job and every material category. CFOS models that decision explicitly instead of defaulting to one or the other.
HOW PROCUREMENT TIMING CONTROLS CASH FLOW.
ORDER TIMING — WHEN THE CASH LEAVES
Every purchase order triggers a cash obligation. The timing of that obligation relative to your billing cycle determines how long you're funding the gap. A switchgear order placed at award on a 9-month job means a 30% deposit leaves immediately, with the balance due at delivery 20 to 52 weeks later — and billing recovery doesn't come until the gear is set and inspected. A bulk conduit order placed 6 weeks before installation on a 3-month TI job means a 30-day payment cycle that lines up closely with the billing event. Knowing which procurement is which — and modeling each one in the forecast — is the difference between a visible gap you plan around and a surprise that hits payroll week.
LEAD TIME — HOW EARLY YOU HAVE TO COMMIT
Lead times on major materials have extended significantly since 2020. Medium-voltage switchgear: 20–52 weeks. Transformers: 16–40 weeks. Structural steel: 12–24 weeks. Large-diameter ductile iron pipe: 8–16 weeks. Specialty conduit and fittings: 4–12 weeks. If the project schedule requires a material to be on site by week 8, and the lead time is 12 weeks, the order must go in at award — before the first billing event, before the first payment from the GC, and often before the ink is dry on the contract. That's not a procurement failure. It's the correct business decision. But it has to be in the forecast at award, not discovered when the supplier calls for payment in month three.
STORED MATERIALS BILLING — RECOVERING COST BEFORE INSTALLATION
Most standard subcontract agreements allow for stored materials billing — billing for material that has been delivered to the project site or an approved off-site storage location, even if it hasn't been installed yet. This is the mechanism that closes the gap between procurement outflow and billing recovery. A $300,000 switchgear delivery can be billed in the month of delivery rather than in the month of installation — a difference of 4 to 8 months on a large commercial job. But stored materials billing has to be negotiated into the SOV at contract execution. After the fact, getting a GC to add it is a fight. The contract review happens before the order goes out — not after.
PRICE LOCK VS CASH FLOW TRADE-OFF — WHEN TO BUY EARLY
Early procurement protects against material price escalation. Copper wire, steel conduit, ductile iron pipe, and structural lumber have all shown 15–30% price swings over 12-month windows. A $500,000 material buyout on a contract bid 6 months ago has real exposure if you're buying at spot. Early procurement — buying at bid price, locking with a supplier commitment — eliminates that exposure. The cash cost is the outflow before billing recovery. The question CFOS models is: what's the cost of early procurement (cash gap, LOC draw, interest) vs. the expected cost of price escalation (percentage increase on unprotected volume)? That calculation, done explicitly at award, produces a procurement timing decision that's financially defensible — not just operationally convenient.
THE PROCESS THAT MAKES IT VISIBLE.
CFOS maps procurement timing into the 13-week and 24-month cash flow forecast at job award — not at project start, not when the supplier calls. The process:
THE GAPS THAT SHOW UP AS EMERGENCIES.
Switchgear Balance Due Hits Without Warning
A $240,000 balance-due notice from an equipment supplier arrives in month four. It wasn't in the 13-week forecast because it was never entered at award. The LOC doesn't have the capacity. The AP queue stacks. The supplier threatens to hold the equipment.
Early Buyout Consumes the LOC Before Billing Clears
Two jobs in simultaneous procurement phase — conduit and pipe ordered early for price lock — draw the full line of credit before either job has generated significant billing recovery. A third job mobilizes. There's nothing left to fund it.
Stored Materials Billing Left on the Table
$400,000 in equipment was delivered and sitting on site for 3 months before installation. It could have been billed as stored materials — but the SOV didn't have the line and it wasn't negotiated at execution. That's 3 months of $400K gap that could have been closed in month one.
Price Escalation Absorbed Without a Decision
Material for a 14-month job was bought at spot price 8 months after the bid. Steel conduit was up 18%. Nobody ran the trade-off analysis. The margin hit was discovered at closeout. Early procurement would have cost $12,000 in LOC interest to save $47,000 in escalation — a 4x return that was never taken because nobody ran the number.
FREQUENTLY ASKED.
Former PM and master electrician. Managed 150+ projects and $300M+ in construction volume including switchgear and transformer buyouts on major commercial projects. Built the CFOS procurement forecasting framework from direct experience on both sides of the equipment deposit conversation.