“Line of credit” describes at least three materially different facilities, and most frustration with the product comes from applying for the wrong one.
A bank line is the cheapest capital most operating companies can access — priced off the prime rate, often with modest spreads for strong credits. The price of that pricing is underwriting: multiple years of profitable financials, personal guarantees, deposits moved to the bank, covenants, and a process measured in months for new relationships. Banks are also the most likely to reduce or call a line when conditions tighten, precisely when you need it.
A non-bank line trades cost for speed and tolerance. Approval in days rather than months, thinner documentation, and more flexibility on credit history — at pricing that runs a meaningful premium to bank rates and is often quoted monthly rather than annually. Watch for draw fees charged on each advance and how quickly repayment is swept; both change the true cost more than the quoted rate does. Convert any quote to an annualized figure with the capital cost calculator before comparing.
A borrowing-base line is what larger facilities actually look like. Above roughly $1M, availability is usually not a fixed number but a formula: a percentage of eligible receivables plus a percentage of eligible inventory, recalculated as the collateral changes. At that point the product has effectively become asset-based lending — a facility that grows with your working capital instead of your history, which is exactly why growing companies graduate to it.