$400,000 requested. $40,000 approved. Most business lines of credit are approved for less than the borrower asked for, and the difference is not a negotiating tactic — it is the borrowing base doing its job. A line of credit is not a pile of money sitting in your account; it is a formula that reads your balance sheet and converts it into available cash, and the formula, not the request, sets the ceiling.
This guide explains revolving business credit from first principles: what it actually is, how lenders set the limit, what it costs in market terms, and where it fits in a healthy capital stack. No sales pitch — just how the machinery works, so you can walk into any conversation already knowing the vocabulary.
Revolving Credit, Explained From Zero
A term loan hands you money once and you pay it back on a schedule. A line of credit is a standing commitment: the lender approves a ceiling, you draw what you need, repay what you can, and the repaid amount becomes available again. You might draw, repay, and redraw dozens of times in a year. That is the entire difference, and it changes everything about how the product is priced and monitored.
The commitment usually runs for a defined period — commonly 12 months, sometimes 24 — with a review at renewal. During the term, payments typically cover interest on the outstanding balance, with principal paid down as cash comes in. Some lenders build in a required clean-up period, commonly 30 consecutive days at a zero balance once a year, to confirm the line is financing working capital and not quietly acting as permanent debt.
The three variables that define any line
Every offer you will ever see is a combination of three numbers: the limit (the ceiling), the borrowing base (the formula that caps how much of the ceiling you can actually use), and the draw period (how long the arrangement lasts before review). Two businesses with identical revenue can get very different offers, because these three variables are set by collateral, cash flow, and credit — not by revenue alone.
How much should you ask for?
Size the request to the gap the line will finance, not to the largest number you can imagine servicing. The common method: monthly operating costs multiplied by the number of months your cash cycle lags, plus a modest buffer. If that math produces $180,000, asking for $400,000 does not improve the odds of approval — it invites scrutiny, and an oversized approval tempts owners into drawing beyond the gap that justified it. Ask for what the business can explain.
A Line of Credit Through One Year
Here is how a typical arrangement actually plays out. You are approved in January and draw $120,000 to buy spring inventory. Through spring, your payments cover interest on the outstanding balance while receivables convert to cash; by June the balance is down to $30,000. A large order arrives in August, so you redraw to $150,000, pay it down by October, and finish the year with a 30-day clean-up. In December, the lender reviews your financials and renews the line — often at the same limit, sometimes higher, sometimes with conditions. The line flexes with the business; that flexibility is what you are paying for.
How Lenders Set the Limit: The Borrowing Base
For secured lines, the borrowing base is mechanical. Accounts receivable come first: lenders advance against eligible receivables — invoices typically under 90 days old, not from related parties, not already pledged — at rates commonly in the 70–85% range. Inventory may be included at lower advance rates, commonly 30–50% of eligible value. Real estate, if it is part of the package, usually supports a separate structure entirely.
The word "eligible" does more work than most borrowers expect. A single customer that represents 40% of your receivables may be capped as a concentration. Invoices past 90 days get excluded. Government or foreign receivables often sit outside the base. This is why a company with $800,000 in open invoices can still be told its borrowing base is $480,000 — not an insult, an arithmetic result.
Unsecured lines work differently: with no collateral to measure, the limit leans on revenue, time in business, and credit, and the ceilings commonly sit lower. We break down both structures on our business lines of credit page.
What the Money Costs, in Market Terms
Pricing on business lines is typically quoted as a spread over a benchmark index — most classically the prime rate — with the spread reflecting risk, collateral, and the lender's cost of funds. Secured lines backed by strong receivables commonly price at lower spreads; unsecured lines for younger or thinner-credit companies commonly run several points higher to account for the added risk.
Beyond the rate, read the fee schedule: origination fees, annual renewal fees, sometimes unused-line fees on larger commitments, and minimum interest charges in some agreements. The headline number is only part of the cost, and you should ask for the full picture in writing. Your specific pricing depends on your file — collateral, credit, industry, and structure — so treat any range you read online, including here, as a starting point for a conversation. Request a personalized quote rather than assuming the market's averages apply to you.
Where a Line of Credit Earns Its Keep
A line of credit is best at smoothing timing gaps — what most owners mean when they say working capital. Inventory you buy in March and sell in June. Payroll for a contract whose invoices pay in 60 days. A seasonal build that repeats every year with the same rhythm. In each case, money goes out before it comes back, and the gap is temporary, measurable, and expected to close.
It is a poor fit for things with long, fixed payback periods. Equipment, vehicles, and real estate are better matched with term debt, where the repayment schedule tracks the asset's useful life. Using a line of credit to buy a machine you will run for ten years means financing a ten-year asset with 12-month money — which works fine until the renewal does not come. Most of the trouble borrowers get into with lines of credit traces back to using the wrong tool for the wrong job.
Worth stating plainly: a line of credit does not fix a margin problem. If the business loses money on every job, borrowing more just scales the losses with smoother cash flow for a while. Lenders who have been at this a while can usually tell the difference between a timing problem and a profitability problem, and so can you if you read three months of cash flow honestly.
Six Terms You'll Hear in Every Lender Conversation
Limit — the maximum you may have outstanding at any time. Borrowing base — the formula, usually receivables and inventory at certain advance rates, that caps how much of the limit you can draw at any moment. Eligible receivables — invoices that qualify for the base, typically under 90 days old and not concentrated with one customer beyond the lender's caps. Clean-up period — a required stretch, commonly 30 days a year, with a zero balance on the line. Blanket lien (UCC-1) — a filing giving the lender a general claim on business assets; common even on unsecured lines, where "unsecured" means no specific asset was pledged, not that no lien exists. Personal guarantee — the owner's personal commitment to repay; standard on most small-business credit, and a term never to sign without reading.
FAQ: Business Lines of Credit in 2025
Is it harder to get a business line of credit in 2025 than it used to be?
Underwriting has been through a tightening cycle, and lenders now look harder at cash flow and existing debt than in the low-rate years. Businesses with clean financials, a few years of history, and manageable leverage still get approved regularly — but the margin for messy files is thinner. The practical answer: prepare a file that answers questions before they get asked.
Can a newer business get a line of credit?
Less commonly from banks, which often want one to two years of operating history, but the market has options for younger companies, from revenue-based unsecured products to secured lines. Expectations adjust accordingly: smaller limits, more weight on the owner's personal credit. See our FAQ page for how we approach start-up conversations.
What happens if I cannot pay the line down?
Most agreements anticipate it. After a defined period, an unpaid balance may convert to a term loan with a fixed repayment schedule, or the lender may require paydown from collections. The danger zone is silence: staying current without a plan typically gets you refinanced or restructured; missing payments gets you default language. Have the conversation before the problem compounds.
Does applying hurt my credit?
Each application commonly triggers a credit inquiry, and several inquiries in a short window can affect scores. Business credit reporting is not uniform — some lines report to business bureaus, some to personal files when a guarantee exists. Another reason to have one well-prepared conversation with one lender rather than firing off six applications.
Working capital is not one product; it is a family of structures that solve different timing problems. If you want to see which one fits your numbers — and where your realistic limit lands before you apply — talk with us at Tesni, LLC for a plain read on the math.