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AP CRISIS · SUBCONTRACTOR CASH FLOW · CONSTRUCTIONCFO.NET

CAN'T PAY SUPPLIERS. HERE IS THE REAL PROBLEM.

QUICK ANSWER

When a subcontractor can't pay material suppliers, it means AR is aging faster than AP is due and billing is not keeping pace with procurement. The work is done. The money is owed. The timing gap between supplier invoice and GC payment is draining the account. CFOS aligns billing to procurement so cash comes in before supplier invoices go past terms.

AP problems are downstream of billing problems. Fix billing velocity and collections first. The suppliers get paid when the cash cycle is running. CFOS installs the cycle.

BY JOSH LUEBKER Published: June 2026 Updated: June 2026
THE FAILURE MODE

AP PILES UP WHEN BILLING FALLS BEHIND PROCUREMENT.

A $2.8M masonry contractor places a $140,000 block order in week 1. The supplier invoices net-30. The GC pays on a 25th-of-the-month billing cycle. The contractor submits the pay app that includes the material on the 28th — three days after the GC's cut-off. The app is rolled to the following month. The GC pays 45 days after the corrected submission.

By then, the block supplier's invoice is 75 days old. The supplier is on the phone. The contractor's account is on credit hold. The next delivery for the job does not ship until the account is cleared. The job stops. Billing stops. The cash problem compounds.

This failure chain starts with one missed billing cut-off. A $140K material order on a job that is billing $280K per month. Three days late on a pay app submission causes a 45-day cash delay and a supplier credit hold. That is not a slow GC problem. That is a billing discipline problem.

45–60
Days — Material to Cash
Average days from material delivery to cash receipt on jobs without procurement-aligned billing. With CFOS: 22–30 days
$120K
Typical AP Float — $3M Sub
Average outstanding AP on a $3M subcontractor without a weekly AP aging review and billing calendar alignment
3 days
Miss That Costs a Month
Missing a GC billing cut-off by 3 days delays cash receipt by 25–35 days on a monthly billing cycle
3 REASONS AP IS PILING UP

THE SUPPLIER CRISIS HAS THREE CAUSES.

MECHANISM 01
PROCUREMENT IS NOT ON THE SOV

On most subcontractor jobs, material procurement is a line item in the cost code system — not a standalone billing line on the schedule of values. When a $60K rebar delivery happens in week 2, it becomes a cost. It does not trigger a billing event until the next pay app cycle, which may be 3 to 5 weeks away.

CFOS structures the SOV before the contract is signed. Every major material procurement event — concrete, rebar, electrical gear, structural steel — gets its own billing line. When material is delivered and staged, the billing line is ready. The pay app captures it immediately. Cash comes in 20–25 days after delivery instead of 45–60.

MECHANISM 02
BILLING CUT-OFFS ARE MISSED

Every GC has a billing cut-off date — the day by which a pay app must be submitted to be included in that month's payment cycle. Miss it by one day and the app waits until the following cycle. On a monthly billing schedule, one missed cut-off is 25–35 days of delayed cash. On a $500K job, that delay represents $80K–$120K sitting uncollected.

CFOS maps every active job's GC cut-off date into ControlQore. Pay apps go out 2 business days before the cut-off, not after. The billing calendar is reviewed every Monday. There is no "we'll get to it this week" — the cut-off is the deadline and the deadline is immovable.

MECHANISM 03
AP AGING IS NOT REVIEWED WEEKLY

Most subcontractors review AP when suppliers call. By then, the invoice is 45 days old, the account may be on hold, and the conversation is adversarial instead of cooperative. CFOS runs a weekly AP aging review — every Monday, alongside the AR review. What is due this week. What is due next week. Which invoices are approaching credit-hold thresholds. Which suppliers need a call now before the account goes sideways.

Proactive AP management keeps supplier relationships intact, maintains credit lines, and allows the business to prioritize payments based on business impact rather than whoever is calling the loudest.

HOW CFOS FIXES IT

FOUR SYSTEMS THAT KEEP SUPPLIERS PAID AND CREDIT LINES OPEN.

01
PROCUREMENT-ALIGNED SOV
Every major material procurement event gets a billing line before the contract is signed. When material arrives, the billing event triggers. Cash comes in 20–25 days after delivery instead of 45–60. That alignment — built into the SOV structure before the job starts — is the single most powerful AP fix available.
02
BILLING CUT-OFF CALENDAR
Every GC's cut-off date is mapped in ControlQore. Pay apps go out 2 days before the cut-off, not after. One saved billing cycle on a $400K job is $60K–$80K of cash that arrives 25–35 days earlier. The calendar makes the deadline non-negotiable.
03
WEEKLY AP AGING REVIEW
Every Monday: what is past 30 days, what is approaching credit-hold thresholds, which suppliers need contact today. AP is reviewed before it becomes a crisis, not after a supplier calls. Proactive management keeps relationships intact and credit lines open.
04
13-WEEK CASH FORECAST
The weekly cash forecast shows every AP obligation coming due alongside expected AR collections. When a large supplier payment due in week 6 aligns with a billing cycle that has no expected receipt until week 8, that gap is visible 6 weeks out — not the day the invoice goes past terms.
$2.1M+
Client AR Recovered Since 2023
18
Active Trade Specializations
60 DAYS
Average Onboarding Time
PRICING

FLAT MONTHLY FEE. NO SURPRISES.

Two tiers based on trailing 12-month revenue. No hourly billing. No payroll. No add-ons.

RevenueCore FinancialExecutive Financial
Under $1M$1,900/mo$2,900/mo
$1M–$3M$2,600/mo$3,600/mo
$4M–$6M$3,800/mo$5,500/mo
$7M–$9M$5,100/mo$6,900/mo
$10M–$12M$6,100/mo$8,500/mo
$13M+QuotedQuoted
What's Included →
COMMON QUESTIONS

FREQUENTLY ASKED.

AP piles up for the same reason payroll gets tight: billing is slow and AR is aging. Material is delivered and invoiced before the pay app that covers it is submitted. The supplier's payment terms are net-30. The GC pays in 45–60 days. The subcontractor is funding the gap with cash that does not exist. On a $3M concrete contractor running 4 active jobs, the structural AP float — the amount owed to suppliers before the corresponding AR has been collected — typically runs $120K–$180K.
CFOS aligns billing to material delivery. Every procurement event — concrete delivery, rebar shipment, electrical gear staging — gets a billing line on the SOV before the PO is placed. When material arrives, the billing event is ready. The pay app captures it immediately. That alignment closes the gap between supplier invoice and contractor cash receipt from 45–60 days to 20–30 days. SPM also builds a weekly AP aging review — what is due when, which suppliers are past terms, and which can hold versus which need immediate payment.
Three things happen in sequence. First, suppliers put the account on hold and stop delivering material. That stops the job, which stops billing, which makes the cash problem worse. Second, suppliers file preliminary lien notices or mechanics liens on the project. That complicates retainage release and can trigger bonding issues. Third, the GC finds out and the relationship deteriorates. One supplier lien on an active project can cost more in relationship damage and legal fees than the unpaid invoice. CFOS catches AP aging before it reaches any of those stages.
CFOS serves commercial subcontractors doing $1M–$12M. Core Financial starts at $1,900/month. Executive Financial starts at $2,900/month. Onboarding takes 60 days.
Core Financial includes ControlQore setup, job costing aligned to your estimates, full-service bookkeeping, and bank reconciliations. Executive Financial adds monthly CFO advisory meetings, controllership, and strategic accountability. No payroll. No scope gaps.
Josh Luebker — The Construction CFO
Josh Luebker
Fractional CFO · The Construction CFO

Former commercial construction PM and master electrician. 150+ projects, $300M+ in volume. Now fractional CFO for commercial subcontractors doing $1M–$12M through Sulphur Prairie Management. About Josh →  |  LinkedIn →  |  CONTROL Book →

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Josh Luebker, The Construction CFO
JOSH LUEBKER
FOUNDER & CFO

Master electrician and former project manager, 150+ projects and $2.1B+ in commercial work. Now runs the numbers for subcontractors instead of standing on the job site.

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STEWART BOHRER
VP OF OPERATIONS

Keeps the system running day to day: job costing, WIP, monthly financial reviews, and the follow-through between calls. Josh handles onboarding.

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