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Most construction businesses don’t struggle because they lack skill. They struggle because profit leaks quietly—missed invoices, forgotten change orders, slow receivables, and no real job costing system.
In Episode 58 of The Deconstruction Podcast, Kosta Panagoulias and Charlie sit down with John McDonald of Integrity Coaching to talk about the unsexy stuff that makes you rich: job costing, cashflow discipline, and ongoing education in the trades.
If you’re a contractor doing real volume but still feel behind on money, this one is for you.
Episode Summary
This episode breaks down why many contractors don’t know their true profit per job—and how that creates blind spots that can quietly erase margins. John shares patterns he sees across trade companies, including how tens of thousands of dollars can go unbilled every year and how receivables (unpaid invoices) can force contractors to borrow money they’ve already earned.
The big theme: you don’t need more work—you need tighter systems.
What Is Job Costing in Construction?
Job costing is the process of tracking your real costs on each job so you know exactly what you made (or lost).
That includes:
- Labor hours (including travel + small “extras”)
- Materials (and price increases)
- Subcontractors
- Equipment, rentals, disposal
- Overhead allocation (where applicable)
- Change orders and additional work
If you only look at profit “overall,” you can easily have one great job masking two losing jobs.
Why Contractors Don’t Know Their True Profit Per Job
A few reasons came up repeatedly in the conversation:
1) Most contractors were never taught “numbers”
John referenced how common it is for business owners to lack education in financials—even if they’re experts in the trade. The result is predictable: pricing by gut, messy receivables, and no consistent job costing discipline.
2) Change orders aren’t tracked
Charlie nailed it: extras happen constantly, but many contractors have no process—they rely on memory. That leads to completed work that never gets invoiced.
3) Jobs go unbilled entirely
One of the most painful examples: service calls or “quick fixes” that get done while crews are already nearby, but never properly written up and invoiced.
The Most Common “Cash Leaks” Contractors Ignore
These are the money leaks discussed in the episode—small individually, massive over a year.
Missed invoices and forgotten jobs
If you’re not logging every job and tying it to an invoice workflow, you are guaranteed to miss revenue.
Contractor takeaway: if it isn’t tracked, it doesn’t get billed.
Unbilled extras and change orders
The classic scenario:
- customer approves extra work verbally or by email
- the PO comes “later”
- weeks pass
- the work gets forgotten
- nobody invoices it
Contractor takeaway: treat change orders like mini-projects—capture them the moment they happen.
Time leaks (the “Tim Hortons problem”)
John brought up a simple example: two people in a truck, 10 minutes in a drive-thru, that’s 20 paid minutes gone. Multiply it across crews, days, weeks, and it’s real money.
Contractor takeaway: you don’t need to work harder—just stop bleeding time.
Receivables: The Profit You Already Earned (But Don’t Have)
A huge part of the conversation was receivables—unpaid invoices sitting 30, 45, 60+ days.
Why it matters:
- past 30 days, collectability drops
- past 45 days, it gets worse fast
- unpaid receivables force you onto a line of credit
- you end up paying interest while customers use you as their bank
Contractor takeaway: chasing receivables isn’t awkward—it’s protecting your business.
How to Get Paid Faster Without Burning Relationships
This came through clearly: you can be firm and still be professional.
Use documentation early
Don’t wait until you’re angry. Start follow-ups at 30 days.
Offer solutions, not threats
John shared a powerful approach:
- give a clear choice: interest + collections vs a payment plan
- put the customer in a position to commit
- if they won’t commit to any plan, you’ve learned something important
Build a system, not a mood-based process
Most receivables issues don’t get solved because contractors “don’t want conflict.” A simple follow-up process solves that.
Holdbacks in Construction: The Contract Mistake That Costs Contractors
Charlie asked a question every trade contractor has lived: the 10% holdback that drags forever because the overall project is delayed.
John’s point was simple:
- if holdback timing isn’t defined, you’re stuck
- “substantial completion” can get blurry fast
- legal enforcement gets expensive quickly
Contractor takeaway: tighten contracts now, not when you’re already chasing money.
Why Ongoing Education Is a Competitive Advantage in the Trades
John’s message was direct: the best contractors keep learning—just like firefighters and pilots train constantly.
Education isn’t theory. The right education becomes:
- tighter job costing
- stronger pricing
- cleaner receivables
- better contracts
- less stress and more profit
John also shared Integrity Coaching’s upcoming “Six Pack” modular learning program (planned for May 2026) focused on practical business training for trade companies.
The Simple Contractor System That Prevents Missed Money
If you want a practical system from this episode, use this:
- Every job gets logged
- Every extra gets captured immediately
- Every completed job triggers an invoice workflow
- Every invoice has a follow-up process
- Every job gets a quick job cost review
You don’t need complicated spreadsheets. You need consistency.
How Jobtable Helps Contractors Run Tighter Systems
Jobtable is built for contractors who want a simple way to run the business without drowning in software.
Contractors use Jobtable to:
- track jobs and work orders
- document extras and changes
- send quotes and invoices
- stay on top of what’s completed and what’s billed
- keep the admin simple so it actually gets done
Key Takeaways from Episode 58
- Job costing isn’t optional—especially when margins tighten
- Missed invoices and forgotten extras quietly destroy profit
- Receivables are earned money—collect them like it matters
- Contracts and holdback terms should be defined upfront
- Ongoing education separates contractors who survive from those who scale
Listen to Episode 58: Job Costing, Cash Leaks, Contractor Education
If you’re a contractor who’s busy but not seeing the money you expect, this episode will hit hard—and give you practical fixes you can apply immediately.
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