A change order that is performed but not billed is a gift to the GC. The crew does the work. The cost hits the job. The revenue doesn't. Most construction owners know this happens on their projects. Most don't know how often — because nobody is tracking it systematically. On a $3M project with active scope changes throughout, unbilled COs commonly represent $80K to $200K in performed work that never gets invoiced.
EVERY UNBILLED CO IS REVENUE YOU ALREADY EARNED. GET PAID FOR IT.
BY JOSH LUEBKERPublished: June 2026Updated: June 2026
Why Change Orders Go Unbilled
VERBAL APPROVALS THAT NEVER BECOME WRITTEN COsThe GC PM says "go ahead" on a wall relocation. The field does the work. Three weeks later when someone tries to write the CO, the GC PM says it was within the original scope. There is no written direction. No email confirmation. No CO number. Without documentation at the time of direction, the claim is a negotiation rather than a billing. And negotiation usually results in partial recovery at best.
COs BATCHED AND SUBMITTED MONTHS AFTER THE WORKMany subcontractors accumulate COs throughout the project and submit them in a batch at the end. By then the GC has moved on, the project superintendent has rotated, and memories of what was directed when are inconsistent. A CO submitted 4 months after the work was done is far harder to get approved than one submitted within 48 hours of the direction.
SCOPE CREEP ACCEPTED AS NORMAL COURSESome subcontractors — especially those with long GC relationships — absorb small scope additions rather than writing COs because they don't want to seem difficult. Five $8K scope additions on a single project is $40K. Ten projects a year is $400K. The relationship costs less than the revenue being surrendered to maintain it.
NO CO TRACKING SYSTEM EXISTSWithout a CO log — initiated, submitted, approved, billed — there is no visibility into what is outstanding. COs get approved verbally and never make it into the billing. Others get submitted but never followed up on. The CO falls through a gap between the field, the PM, and accounting.
The 48-Hour CO Protocol
DIRECTION RECEIVED → CO INITIATED WITHIN 48 HOURSEvery field direction that changes scope gets a CO initiated within 48 hours — not after the work is done, not at month end. The CO documents the direction, the scope change, the crew deployed, and the estimated cost. If it turns out the work was within scope, the CO gets withdrawn. If it was extra scope, the documentation is already built.
CO LOG MAINTAINED AS A LIVING DOCUMENTEvery CO — initiated, submitted, in review, approved, disputed, billed — tracked in a single log accessible to the PM, the owner, and accounting. Nothing falls through the gap between the field and the billing cycle because everything is visible in one place.
APPROVED COs BILLED IN THE NEXT BILLING CYCLEAn approved CO that doesn't get invoiced in the next billing cycle is an unbilled CO. The CFOS billing system connects the CO log to the monthly pay application — approved COs are automatically included in the next submission rather than tracked separately and submitted when someone remembers.
PENDING COs TRACKED AND ESCALATED AT 30 DAYSA CO submitted but not approved within 30 days gets an escalation flag. The PM follows up. If the GC is disputing the CO, the dispute is surfaced while the project is still running and the documentation is current — not at job close when leverage is gone.
CO FADE HITS EVERY TRADE DIFFERENTLY.
Electrical
Electrical work accumulates directed changes faster than any trade — a moved panel, added circuits, revised lighting layouts. Individually small, often verbal, frequently absorbed. An electrical sub running 40 directed changes across a job at an average $1,800 each is sitting on $72K of unbilled scope. The 48-hour protocol exists because electrical COs age into disputes faster than they age into payments.
Sitework & Grading
Sitework COs come from the ground — differing conditions, quantity overruns, undocumented haul-off. The documentation burden is higher: photos, survey data, truck tickets. Which means time pressure kills more sitework COs than GC pushback does. The protocol for dirt trades is documentation-concurrent-with-work, not documentation-after.
Drywall & Interior
Interior trades eat scope creep through plan revisions — a moved wall, a revised ceiling detail, an added soffit. The GC narrative is always 'that was in the documents.' Drywall subs need a drawing-revision log tied to the CO log: every revision date, every scope delta, priced within 48 hours of receipt. The paper trail is the margin.
Concrete
Concrete COs concentrate at the pour: added embed plates, revised slab thickness, pump time the GC directed. Once the pour is done, the evidence is literally buried. Pre-pour photos and same-day CO pricing are the difference between recovering the cost and donating it.
WHAT THE 48-HOUR PROTOCOL ACTUALLY RECOVERS.
$310K
Recovered in 30 days. A $7.1M civil contractor's first month of CFOS included a full CO audit — every directed change, every quantity overrun, every unbilled delta on active jobs. $310K in recoverable scope was identified, priced, submitted, and collected within the first billing cycle. The work had been performed months earlier. Nobody had ever billed it.
48 Hours
From verbal to priced. The protocol is simple: any change in conditions, scope, or drawings triggers a written CO within 48 hours — priced, logged, submitted. Not at month end. Not when the PM gets around to it. GCs learn within two cycles that this sub papers everything, and the verbal-directive games stop.
40–60%
Of profit fade, eliminated. Across SPM clients, unbilled and undocumented COs account for 40–60% of the gap between estimated and final margin. It's the single largest recoverable category of profit fade — bigger than labor overruns, bigger than material waste. The protocol doesn't improve productivity. It just stops giving work away.
Frequently Asked Questions
Based on SPM client experience, unbilled and under-recovered COs account for 40 to 60% of profit fade on commercial subcontractor projects. Labor overruns are the second most common cause. But COs are the most controllable — a 48-hour initiation protocol and a connected billing system eliminate most CO-related fade. Labor overruns require production tracking and cost-to-complete management to catch.
Positively, in practice. GC project managers respect subcontractors who document scope changes promptly and professionally. The ones who create friction are the subcontractors who absorb undocumented scope for months and then submit a surprise batch of COs at project end. A CO submitted 48 hours after direction is a professional transaction. A CO submitted 6 months after the work is a surprise and a conflict.
A notice-of-potential-change letter goes out from SPM within 48 hours documenting the verbal direction received, the scope identified, and the intent to submit a CO pending written direction. This creates a written record of the event even when the GC hasn't issued formal direction. Most contracts support this approach. Most GC PMs will issue written direction once they see the letter rather than risk the documentation gap.
Then you send written notice anyway — same 48 hours, documented as a pending change directive with your price attached. Most subcontract agreements have a notice clause; missing the window waives the claim regardless of merit. A GC that says 'just do it, we'll square up later' is creating a record-free zone where your costs disappear. Your written notice re-creates the record. If they still refuse, you have a documented claim instead of a memory. Experienced GC project managers respect subs that paper changes — it's the inexperienced ones who call it difficult.
Yes, in batched form. Individually a $400 change feels like paperwork theater. But small directed changes are exactly what GCs expect you to absorb, and twenty of them is $8,000 of donated work per job. SPM clients log every change regardless of size and submit small ones weekly as a batch CO. The discipline matters more than the dollar value — a sub that papers everything trains the GC out of the small-change game entirely.
HOW MUCH REVENUE DID YOUR LAST PROJECT LEAVE UNBILLED?
If you can't answer that, the first call shows you how to install the CO tracking and billing protocol that makes that number visible — and recoverable.
Former commercial construction project manager and master electrician. Managed 150+ projects totaling $300M+ including Google data centers, military bases, hospitals, and high-rises. Now fractional CFO for commercial subcontractors doing $1M–$12M through Sulphur Prairie Management.
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