By Matthew Boos
How manufacturers can protect profit during supply chain panic
When uncertainty drives inventory decisions, the real risk may not be stockouts. It may be the cash trapped on your balance sheet.
There’s a moment most small manufacturers recognize: a supplier warns about delays, a material price ticks up for the third consecutive month, and the owner makes a call. Buy more. Buy it now. Lock it in while you still can.
It feels like prudent management. It might even be right, once in a while. But do it across enough materials, enough suppliers, enough months, and it becomes one of the most reliable ways to drain cash and compress margins without ever producing a single bad quarter on paper.
Most owners never look at their balance sheet and think, “Inventory is what’s hurting me.” That’s exactly why it keeps hurting them.
The cost you’re not calculating
Carrying inventory isn’t free, and most small manufacturers don’t track what it actually costs them to hold it. According to the Institute for Supply Management and the Association for Supply Chain Management, inventory carrying costs typically run between 20% and 30% of total inventory value annually. That includes warehouse space, insurance, handling, and the capital cost of money tied up in stock that could otherwise be servicing debt or covering payroll.
For a manufacturer holding $500,000 in inventory, that’s $100,000 to $150,000 per year in carrying costs alone, before accounting for obsolescence, spoilage, security, or the management overhead required to control it.
When supply chain fear pushes a manufacturer to double or triple safety stock across even a handful of SKUs, that number climbs fast. And unlike a direct expense on the P&L, it doesn’t announce itself. It shows up as tighter cash, a swelling balance sheet, and a quiet, persistent pressure on working capital that the owner often chalks up to growth or market conditions.
The real problem isn’t inventory. It’s visibility.
The purchasing behavior is the part you can see. What’s usually underneath it, in almost every small manufacturer we work with, is a cost structure that nobody has updated since the last time business was rough.
Most manufacturers under $20 million in revenue are pricing and purchasing based on estimates that may not have been updated in months, or in some cases, since the business last went through a rough patch. Standard costs get set once and drift. Overhead absorption rates don’t reflect the current production mix. Labor burden calculations assume a staffing structure that no longer exists. The result: owners and managers are making material acquisition decisions using financial data that describes a business from a year ago.
You may believe a product carries a 38% gross margin. But if aluminum input costs have risen 18%, your freight carrier has added fuel surcharges, and you haven’t refreshed your burden rates since adding two full-time employees, that product might be running closer to 22%, and you won’t see it until the year-end reconciliation, well after the pricing and purchasing decisions have already been locked in.
By the time those errors surface at year-end, the business has already spent six to eight months making pricing and purchasing calls that can’t be unwound.
Before a manufacturer can make a rational safety stock decision, they need a current, accurate picture of true product profitability. Without it, buying more to be safe is just spending money in the dark.
What reactive purchasing actually looks like over 12 months
Here’s what this actually looks like.
A small custom metal fabricator, around $8 million in revenue with 28 employees, started building inventory fast when steel lead times stretched out and distributor prices started moving. Within two quarters, the company had accumulated roughly three times its normal stock. The owner felt protected.
Cash available for payroll and debt service tightened. The company drew on its line of credit to cover operating expenses it had previously funded from operations. Interest expense increased. Meanwhile, demand from the company’s two largest customers softened, not dramatically, but enough that finished goods began aging. Storage space that had been informally shared with production was now formally competing with it, creating scheduling friction.
Within eight months, the business was technically profitable but cash-constrained, carrying excess materials it couldn’t deploy fast enough, and operating on a line of credit that had started as an emergency backstop but was now a permanent fixture. The owner’s instinct to protect the business had, through no single unwise decision, gradually undermined it.
The fix was a hard look at what was actually profitable. The company conducted a SKU-level profitability analysis, identified which materials supported the highest-margin products, set data-driven reorder points for those items only, and let the rest normalize through consumption. Within two quarters, days inventory outstanding dropped from 67 to 41, the line of credit balance fell by half, and the owner had, for the first time in over a year, a forward cash projection he could act on.
The three questions that separate strategy from reaction
For a small manufacturer navigating continued supply chain pressure, the right framework isn’t “How much should I hold?” It’s three prior questions.
1. Do you know your true product-level margin right now?
Not as of your last cost update, but today.
If your standard costs or burden rates haven’t been refreshed in the past 90 days and input costs have moved, your margin data is stale. Price increases and purchasing decisions built on stale data compound errors, they don’t correct them.
A 13-week rolling cash forecast tied to actual inventory consumption and current cost structures will reveal what your P&L alone cannot.
2. Which materials actually represent shortage risk for your highest-margin products?
Most manufacturers can’t answer that without doing the analysis.
If you’re applying the same safety stock logic to everything you buy, you’re spending cash to protect products that don’t warrant it.
3. Who in your business makes purchasing decisions when things feel uncertain?
In most small manufacturers, the answer is the owner.
And the owner is also managing a customer crisis, a staffing problem, and a machine that needs maintenance, simultaneously.
Purchasing discipline that lives only in one person’s head doesn’t survive a bad week. It doesn’t need to be complicated to be better: defined reorder points, a lead-time log, and a threshold above which someone has to ask before buying.
The goal isn’t bureaucracy. It’s making sure a good decision can happen even when the owner is unavailable.
What “built to adapt” actually means
Prolonged supply chain pressure won’t break the manufacturers who reacted fastest or bought the most. It will break the ones who tied up their cash in inventory they couldn’t see clearly and then ran out of room to maneuver when conditions shifted.
The businesses that navigate prolonged disruption are typically the ones that built measurement systems, current cost data, SKU-level profitability, and a real cash forecast, that let them make rational decisions quickly when conditions change.
They carry safety stock where the data justifies it, run lean everywhere else, and have someone besides the owner accountable for purchasing triggers.
Most manufacturers protect everything because they don’t know what actually matters. Figuring that out, before the next disruption hits, is worth more than anything sitting in your warehouse right now.
