Operator memos.
Selected writing on construction cashflow, billing infrastructure, and collections operations.
The Waiver That Held a $340K Draw — And How It Was Preventable
A mechanical subcontractor on a $4.2M hospital project submitted their March pay application on time. The GC held the full $340K draw for 22 days — not because of a billing dispute, not because of incomplete work, but because one conditional lien waiver from a material supplier was missing from the package. The supplier had been paid. The waiver existed. No one had collected it.
This is not an unusual story. It is a weekly occurrence across construction projects at every size.
The mechanics of a payment hold in this scenario are simple: most GC contracts require the sub to provide conditional lien waivers from all lower-tier suppliers before releasing a draw. If one supplier waiver is missing, the entire draw waits. The GC is not being difficult. They are following their contract.
The sub in this case had a PM who was responsible for collecting waivers alongside running two other active projects. Waiver collection was not his primary function. It was a task he did when he remembered to do it.
The 22-day hold cost approximately $1,900 in additional float on a line of credit at current rates. More importantly, it compressed the sub's cash position during a period when they had two other large material orders due.
The fix is not a software tool. The fix is a dedicated function. One operator, responsible for waiver collection across every active project, working a structured weekly cadence. Waivers collected before the pay app period closes — not after the hold arrives.
The $340K draw was eventually released. The damage was manageable. On a smaller sub with tighter margins, it would not have been.
Why Your PM Should Not Be Your Billing Person
Most subcontractors between $2M and $15M in revenue do not have a dedicated billing function. Pay applications are prepared by project managers, owners, or office administrators who also have primary responsibilities elsewhere. This structural decision costs the average sub between 3% and 7% of annual billings in missed revenue, delayed payments, and undocumented change orders.
The logic for having PMs handle billing seems sound: they know the job, they know what was installed, they know the quantities. But knowing the quantities and having the time and systems discipline to bill them accurately every month are two different things.
Project managers are measured on project delivery — schedule, quality, subcontractor coordination, owner satisfaction. Billing is not how they are evaluated. When the billing deadline conflicts with a site issue, the site issue wins. Every time.
The downstream effects compound. A late pay app submission delays the entire approval cycle by 30 days minimum. An underbilled month — common when a PM estimates quantities instead of verifying them — is margin that is never recovered. Change orders that are not tracked and billed in the period they occur are frequently lost.
The industry has accepted this as a cost of doing business. It is not. It is a staffing decision — specifically, the decision not to staff a dedicated billing function.
A dedicated pay application operator changes the math. Every submission is on time. Every change order is documented and billed. Stored materials are tracked. Retainage is monitored. The PM does not touch billing. The billing function runs on a fixed weekly cadence regardless of what is happening on the project.
The recoverable margin from this one operational change — on a $5M sub — typically exceeds the cost of the operator within the first 60 days.
The 30-Day Rule in Construction Collections
Invoice recovery rates in construction drop sharply after 30 days. Not 60. Not 90. 30. The industry treats 60-day invoices as normal and 90-day invoices as a problem. This framing is wrong, and it costs subcontractors a measurable percentage of annual revenue every year.
The data on invoice recovery in construction is consistent across subcontractor segments: invoices contacted within 30 days of the due date are collected at rates above 94%. Invoices that go uncontacted past 30 days drop to 76% recovery by day 60 and below 60% by day 90.
The problem is not the GC or the owner. Most overdue invoices are not disputed. They are delayed because no one called. The GC's AP department has a queue. Invoices with follow-up activity move through the queue faster. Invoices without follow-up do not move at all.
Most subcontractors do not have a collections cadence. They have an owner who checks the AR aging report when cash is tight and makes a few calls. This is not a cadence. It is a reaction.
A structured collections cadence looks like this: every invoice over 30 days receives a written contact by day 32. A phone follow-up by day 36. A formal written reminder by day 45. An escalation brief to the owner by day 60. A lien rights assessment by day 75.
This cadence is not aggressive. It is consistent. Consistency is what moves invoices through the AP queue. GCs pay the subs who follow up. They do not pay the subs who wait.
The operator who owns this function does one thing: works the AR aging report every week without exception. That discipline, applied consistently across a $5M sub's receivables, produces measurable DSO reduction within 60 days of install.
Memos are published when there is something specific and useful to say.