Founders default to external financing when they want to fund growth, and they skip past the working capital sitting inside their own operating cycle that could fund a meaningful chunk of it without diluting anyone or paying interest. Inventory turns, receivables days, and payables terms are levers most companies barely touch.
Inventory Is Cash Wearing a Disguise
Excess inventory is cash that's stopped moving. I now run inventory turn analysis by SKU quarterly, not annually, because slow-moving SKUs quietly tie up cash that could otherwise fund a new product launch or a marketing push, and by the time an annual review catches it, a year of opportunity cost has already passed. Cutting a slow SKU or negotiating better minimum order quantities with a supplier can free up real capital faster than most fundraising processes.
Receivables discipline matters just as much. Every extra day a customer takes to pay is a day that cash isn't available to reinvest. I've renegotiated payment terms with slow-paying customers, sometimes trading a small pricing concession for faster payment, because the cash flow benefit of collecting two weeks earlier often outweighs the margin given up.
Extend Payables Without Damaging Supplier Relationships
On the other side of the cycle, negotiating longer payment terms with suppliers, especially ones where you've built volume and reliability over time, effectively extends an interest-free financing line you already have access to. I approach these conversations transparently, tying term extensions to genuine growth in order volume rather than presenting them as a unilateral demand, because suppliers respond very differently to a partnership framing than to a squeeze.
Working capital optimization won't replace a real financing round for major expansion, but it's the cheapest capital available, and most companies leave a meaningful amount of it sitting unused inside their own balance sheet.