By shrinking net working capital days on $4.7 million in annual revenue, $154,000 more than the P&L's reported net profit.
The combined timing lag across accounts receivable, inventory, and accounts payable, cut through a single working capital audit.
The actual bankable balance the week a $10,600 payroll run bounced, despite a $10,800 account total.
The new floor Preston's business maintains every week, built from a target of 1 month's operating expenses.
A $4.7 million electrical contractor uncovers $478,000 in trapped cash through a weekly working capital audit.
A working capital audit tracks how many days cash sits trapped in receivables, inventory, and unpaid bills before it's collectible. Shrinking that number can release six figures in cash a growing business never knew it had.
That's what happened for Preston (not his real name), who runs a $4.7 million electrical contracting company. His P&L said $324,000 in profit; a working capital audit found $478,000 in cash trapped in the business instead.
Preston's business looked healthy from every angle that mattered to him: revenue climbing, jobs profitable individually, the P&L closing most months in the black.
Yet none of that told him where his cash sat, or whether it would be there the week he needed it.
"Which is probably what we've been doing," Preston admitted, once Stuart Trier, founder and CEO of Clear Results, started walking him through how his accounts receivable, inventory, and accounts payable had been moving relative to each other over the prior year. Nobody had ever laid the 3 side by side. Growth had been treated as purely a revenue question, with no thought given to the separate question of when that revenue would turn into spendable cash.
Recent numbers showed why that mattered. Over one measured period, Preston's business had gone from $80,000 to $100,000 in accounts receivable, effectively lending clients an extra $20,000 a month. Inventory had crept from $75,000 to $85,000. Accounts payable had dropped from $100,000 to $85,000, meaning suppliers were being paid faster even as customers were paying slower. Layer all three together and $45,000 had quietly left the business in a single stretch, even as sales were rising. Extended across the full year, the same math produced a bigger figure. Net working capital days, the combined lag across receivables, inventory, and payables, had crept upward as the business grew, and nobody had ever put a number on it. Shrinking that lag by 7.8 days on $4.7 million in revenue released $478,000 back into the bank account, against a P&L that had only ever shown $324,000 in profit, and it did that without a single new sale, a new hire, or a price increase.
Net working capital days measures how long your cash stays locked up in unpaid customer invoices and inventory before you collect it, minus the days your suppliers give you to pay them.
Here's why it matters: when a business grows, labor and materials get paid up front, in cash. Customer payment lags behind. Paper profit on a P&L can't cover Friday's payroll if that same profit is still sitting in a stack of uncollected invoices. Picture a $100,000-a-month contractor carrying 45 days of uncollected receivables: that's $150,000 trapped on the street at any given moment. Cut collection time to 15 days, and $100,000 of that comes straight back into the bank, with no new sales required to get it. That's the mechanism Preston's audit uncovered. Growth had been quietly widening this timing lag instead of narrowing it.
Discovering the mechanism in July didn't fully protect Preston from it. 5 months later, the same timing lag nearly stopped payroll cold.
On a December weekly call, the team pulled up the bank balance: $10,800. It looked survivable. But Preston's equity partner walked through what was really behind it. "So we have 10,800 in the bank account, but only because 10,600 bounced back from paychecks," he explained. A prior payroll run that should have cleared had instead reversed, leaving the real, usable balance at $200. One payroll cycle away from insolvency, on a business doing $4.7 million a year.
Preston, describing what payroll week had quietly become before that call, put it plainly:
"The week of payroll is usually like, I need to stop doing most things and try to figure out how to get the cash in the bank so we can dump it for payroll."
— Preston
That was the friction moment that turned the July audit's math into an installed system.
A working capital audit is a diagnosis. On its own, it doesn't stop a payroll run from bouncing 5 months later. Preston's team needed a standing floor, checked every week, in place of a one-time calculation revisited only when cash ran out.
The response had 2 parts. First, a hard reserve target of 1 month's operating expenses, $20,000 to $25,000, held before any distribution or expansion spending. Second, a weekly scorecard tracking true cash balance alongside sales and collections. "So that's our first order of business: finding a way not to be in that situation ever again," Stuart Trier told the team on that December call. "It's so important to sprint to getting one month total operating expense." The reserve target wasn't abstract; it was a specific dollar floor, reviewed every week, with the account balance itself as the accountability mechanism.
Collections got the same weekly discipline: bill the day it closes, remind before the due date, follow up once it's overdue.
As Stuart put it to Preston directly:
"You need to teach your AR person that they're dialing for your dollars. We're not bugging people. We've gone to their place and fixed their electrical. This isn't a favor for them to pay us."
— Stuart Trier, Founder & CEO, Clear Results
The same logic extended to collection odds by age. Invoices at 30 to 60 days still collect at close to 100 percent; past 90 days, that drops below 30 percent. Every week an invoice ages unpaid is a week its odds of ever getting collected are quietly falling.
| Metric | Before | After |
|---|---|---|
| Net working capital | Untracked; $478,000 tied up across receivables, inventory, and payable timing | Net working capital days cut by 7.8, releasing the trapped cash back into the bank |
| Liquid cash on hand | $200 the week a payroll run bounced | $20,000-plus maintained as a standing weekly reserve |
| Financial visibility | Monthly P&L review; cash-timing risk invisible between closes | Weekly scorecard tracking live cash balance alongside sales and production |
| Payroll reliability | One payroll run bounced entirely | Zero bounced payroll runs since the reserve floor was installed |
Stuart Trier summed up why the mechanism matters beyond this one business: "Your business can only grow at your cash conversion cycle. If you try to go faster, you end up borrowing money." Growth doesn't fail because revenue stalls. It fails because cash can't keep pace with how fast a business is willing to spend ahead of collecting.
Net working capital drag isn't specific to electrical contracting. Any home service business runs the same risk as revenue scales.
An HVAC contractor landing a run of commercial rooftop-unit retrofits faces it directly. Equipment gets ordered on 30-day distributor credit, 2 crews go on payroll for 3 weeks, and the client pays on net-60 terms. The cash doesn't land until 2 months after the P&L books it.
A plumbing company expanding from residential service into new-construction rough-in work hits the same wall from a different angle. Same-day residential jobs pay by credit card; multifamily rough-ins get paid through monthly draw applications, often with a retainage held back until final inspection. Add 2 new plumbers to staff the larger jobs, and the payroll obligation shows up in week 1, while the first payment might not land for 45 days.
A roofing company doing storm-restoration work after a major hail event runs into it hardest of all. Materials get ordered and crews get paid weekly. But insurance checks are frequently made co-payable to the homeowner's mortgage company, adding 60 to 90 days of processing before funds clear at all. A roofer can complete $400,000 of restoration work in a month, book it all as revenue, and still be unable to make the next payroll, because the mortgage company holding the check has to countersign it before the roofer can deposit a cent, and that countersignature alone can take 2 to 3 weeks on its own.
In every case, the mechanism is the same one Preston's business hit: revenue on the P&L and cash in the bank are not the same measurement, and the distance between them grows exactly when a business is scaling fastest.
1. Why can a profitable business still run out of cash for payroll?
A P&L reports revenue the moment a job is billed, whether or not the customer has paid yet. If accounts receivable, inventory, and unpaid supplier bills are all growing at once, cash gets absorbed into that lag even while the P&L shows a healthy profit. A business can report $324,000 in net profit and still carry only a few hundred dollars in truly liquid, spendable cash on any given week. But the 2 figures measure different things entirely.
2. How does tracking net working capital days release cash that's already been earned?
Net working capital days combines 3 separate timing lags into one figure. It covers how long customers take to pay (accounts receivable), how long materials sit before being billed (inventory), and how long a business takes to pay its own suppliers (accounts payable). Shrinking the first two and extending the third, without changing sales, pricing, or headcount at all, pulls cash that was already earned back into the bank faster. On a $4.7 million business, a 7.8-day improvement released $478,000.
3. What's the fastest way to speed up collections without upsetting customers?
Bill the day a job closes rather than waiting for a batch invoicing cycle, send a reminder before the due date rather than after, and follow up the moment an invoice goes overdue. Collection odds fall the longer an invoice ages: near 100 percent at 30 to 60 days, below 30 percent past 90 days. The goal is catching slow payers early, well before they turn into bad debt to chase. But none of this requires new payment terms or upfront deposits, just a consistent weekly routine.
4. How big should a cash reserve be for a growing home service business?
One month of operating expenses, held in the bank before any owner distribution or new spending. For a $4.7 million business, that's roughly $20,000 to $25,000.
5. Does this apply to a business smaller than a few million dollars in revenue?
Yes, though the dollar figures scale down. The mechanism is tied to timing, how a business pays for labor and materials relative to when customers pay it back, rather than to size. It typically gets worse as revenue climbs, since faster growth means more cash committed up front before it's collected back. A $1 million contractor with a 2-week receivables lag faces the identical mechanism as a $10 million one; only the absolute dollars trapped differ.
6. Is a working capital audit the same thing as home service coaching?
Not quite. Where a typical home service business coach hands owners a framework and checks in once a month, this kind of audit gets built directly into the business's own numbers: accounts receivable, inventory, and payables mapped from the actual books, then tracked weekly going forward rather than revisited once a quarter. The output is a specific dollar figure, checked against the actual bank balance every week.
Related reading: Why Your P&L Is Lying to You (And What to Look At Instead) · The Weekly Scorecard: How to Know If Your Business Is Healthy in 5 Minutes
Stuart Trier is the Founder and CEO of Clear Results. Over the past 20 years, Stuart has built, bought, and sold 11 companies across the home service, healthcare, and marketing industries. He built his first company from startup to $8M in revenue in 3 years before a successful exit, then built a chain of 28 healthcare clinics and sold the business to a publicly traded company. Following that acquisition, Stuart spent 3 years working alongside the CEO, helping lead the organization through a take-private transaction before participating in a nine-figure exit to a Fortune 10 company. Today, he's the lead investor behind an electrical services platform operating across 3 U.S. states, and has worked directly with owners through 1,800+ strategic advisory sessions.
