The short answer. Growth is healthy when three metrics hold or improve as revenue grows. Days-of-working-capital stays stable or improves. Realized Gross Margin holds at Intended (no widening cascade). MMP coverage ratio improves. If any of the three is moving the wrong way while revenue climbs, growth is silently corroding the business. Unfunded growth is the number one cause of small business failure.
The Days-of-Working-Capital Test
Days-of-working-capital = (Current Assets - Current Liabilities) / (Annual Operating Costs / 365).
It measures how many days the business could operate on hand if all incoming cash stopped.
In healthy growth, this number stays stable or grows slightly as revenue expands. In unfunded growth, it shrinks. The contractor field note shows this exact pattern. Revenue up 64 percent. Days-of-working-capital dropped from 65 to 39. That drop was the cash crisis showing up in the leading indicator before the checks started bouncing.
The Realized Margin Test
As the business grows, is Realized Gross Margin holding at Intended? Or is the cascade widening?
Growth without operational discipline usually widens the cascade because new customers, new crew, and new work introduce variance the mature book had already normalized. A 34 percent Realized margin at $2 million revenue can become a 30 percent Realized margin at $3 million revenue if the operational systems have not scaled.
That 4-point margin degradation at $3 million is $120,000 in lost gross margin dollars. On a business with a growing MMP, that is exactly the amount MMP needed to fund the new debt service or new hires.
The MMP Coverage Test
MMP coverage ratio = Realized Pre-Tax Profit / Restated MMP.
In a healthy business, this number is at 1.0 or above. Coverage of 1.2 means the business generates 20 percent more pre-tax profit than MMP requires, which funds reserve building or reinvestment.
In unfunded growth, this ratio drops below 1.0. The business is technically profitable on the P&L and diagnostically insolvent against MMP.
The trap is that the P&L reports the profit trend as favorable while MMP is silently rising faster. Only diagnostic restatement surfaces the coverage decline.
Frequently Asked Questions
What growth rate is safe?
Depends on the business's working capital cycle and margin profile. Trades with 45-day collections and 40 percent gross margins can usually sustain 10 to 20 percent annual growth without funding stress. Businesses with 90-day collections or thin margins need to be more conservative. Model the specific case.
How do I know if my growth is being funded by debt?
Look at the change in current liabilities relative to change in current assets. If liabilities are growing faster, growth is being funded by trade credit or borrowing. That is fine short-term. It is unsustainable as a long-term pattern.
Should I ever grow at 40 to 50 percent per year?
Rarely, and only with explicit growth capital and a repriced MMP. Growth at that rate consumes working capital faster than most SMB pricing models can replenish it. The business either raises equity, takes on significant debt, or breaks.
Can I use growth to solve a current MMP shortfall?
Almost never. Growth expands MMP because it expands working capital needs. Solving an MMP shortfall usually requires repricing or cost restructuring, not more revenue at the same margin.