A business line of credit is the most flexible financing tool most companies will ever use—and one of the most misunderstood. Unlike a loan that drops a lump sum into your account, a line is a reusable credit limit you tap only when you need it, repay, and tap again. This guide breaks down exactly how the draw-and-repay mechanics work, what it really costs, how lenders set your limit, and when a line beats every other option.
How a business line of credit actually works
Think of a business line of credit as a financial reservoir you control. A lender approves you for a maximum—say $100,000—and you draw against it whenever you choose. Each draw transfers cash to your bank account, usually within hours to a day. You then repay on the lender's schedule, and as you pay down principal, that amount becomes available to borrow again.
The defining feature is that you only pay interest on the balance you've drawn, not on the full limit. With a $100,000 line where you've drawn $25,000, interest accrues on $25,000. Leave the rest untouched and it costs you nothing in interest (though some lenders charge a flat maintenance fee).
This revolving structure is what separates a line from a term loan, which funds once and amortizes on a fixed schedule. If your need is recurring or unpredictable, the line wins on flexibility. For a deeper side-by-side, see our guide on line of credit vs. term loan.
Revolving vs. non-revolving lines
Not every product labeled "line of credit" revolves the same way.
- Revolving line: The most common type. Repaid principal replenishes your available credit indefinitely (within the line's term). This is the classic reusable structure.
- Non-revolving line: You can draw up to the limit in stages, but repaid amounts do not free up new availability. Once you've drawn the full amount, the line is exhausted—it functions more like a flexible-disbursement loan.
Most short-term working-capital lines from online lenders revolve. Non-revolving structures show up more often in project-based or construction lending where draws are tied to milestones.
Secured vs. unsecured lines of credit
Lines come in two collateral structures, and the choice shapes your limit, rate, and approval odds.
| Feature | Unsecured line | Secured line |
|---|---|---|
| Collateral | None pledged (but usually a personal guarantee + UCC lien) | Backed by assets like AR, inventory, or cash |
| Typical limits | Smaller ($10K–$250K) | Larger; can scale into the millions |
| Rates | Higher | Often lower |
| Approval bar | Strong credit + cash flow | Asset quality drives the decision |
| Best for | Established businesses with clean financials | Companies with valuable receivables or inventory |
Even "unsecured" lines almost always require a personal guarantee and a UCC lien on business assets—so the lender still has recourse. A secured line backed by accounts receivable is a form of asset-based lending, where your borrowing capacity flexes with your AR balance. To weigh the trade-offs more broadly, read secured vs. unsecured business loans.
Typical limits, rates, and fees
Pricing on lines varies widely by lender type and your profile. Here's a realistic picture.
Credit limits. Online and fintech lenders commonly approve $10,000 to $250,000. Banks and credit unions issue larger lines—often $100,000 to several million—for businesses with strong financials and history. Asset-based lines size to your collateral, so a growing receivables base can mean a growing limit.
Interest rates. Bank lines for well-qualified borrowers are often priced as a spread over the prime rate. Online lines run higher to offset speed and looser requirements. As a rough range, expect anywhere from about 8% to 25%+ APR depending on credit, revenue, and structure.
Common fees to watch:
- Draw fee: A small percentage (often 1%–3%) charged each time you pull funds.
- Maintenance/monthly fee: A flat charge to keep the line open, regardless of use.
- Origination fee: A one-time setup cost on some lines.
- Renewal fee: Charged when the line is re-underwritten and extended.
How lenders set your limit
Underwriters reverse-engineer a limit from your ability to repay. The main inputs:
- Time in business (TIB): Most line lenders want at least 6–12 months; banks often prefer 2+ years.
- Monthly and annual revenue: Lines are frequently sized as a fraction of monthly revenue—commonly 10%–25% of monthly sales as the credit limit.
- Cash flow: Lenders read your bank statements to confirm consistent deposits and few non-sufficient-funds events.
- Credit profile: Personal FICO and business credit score influence both approval and rate. Many online lenders look for 600+; banks often want 680+.
- Existing debt: Heavy existing obligations or recent stacking reduce available capacity.
If your business runs on receivables, building stronger AR and reducing days sales outstanding can directly support a larger secured line. For the fundamentals, see what is working capital.
Best-fit use cases (and when to skip it)
A line of credit shines for short-term, recurring, or unpredictable needs:
- Bridging receivables gaps. You've delivered the work and invoiced on Net 30 or Net 60 terms, but payroll is due now. Draw to cover the gap, repay when the invoice clears. (If receivables are your core constraint, also compare invoice factoring.)
- Smoothing seasonal swings. Stock up before peak season, then repay as revenue arrives. See our seasonal business financing guide for tactics.
- Covering payroll or surprise expenses. A reliable cushion beats scrambling when a big bill lands.
- Buying inventory opportunistically. Take advantage of a supplier discount without draining cash reserves.
When a line is the wrong tool: large one-time purchases like commercial real estate or major equipment. A line's revolving rate and short structure make it expensive for long-lived assets—use equipment financing or a term loan instead. A line is also a poor fix for chronic operating losses; borrowing to cover a structural shortfall just delays a harder conversation.
How to qualify and apply
Gather the basics before you apply: recent business bank statements (usually 3–6 months), a government ID, your EIN, and—for larger or bank lines—tax returns and financial statements. Then:
- Check your numbers. Know your average monthly revenue, time in business, and rough credit standing.
- Decide secured vs. unsecured. If you want a bigger limit and have quality receivables or inventory, a secured line may serve better.
- Compare multiple offers. Rates, fees, and limits vary enormously between lenders for the same borrower.
That last step is where a marketplace helps. EQ Funding lets you route one application to a network of lenders who compete to fund your line—so you see side-by-side offers instead of taking the first one you find. EQ is not a lender; the competing lenders are. To understand how that differs from walking into a single bank, read funding marketplace vs. bank.
Used well, a business line of credit is the closest thing to financial breathing room: capital that's there when you need it, quiet and free when you don't. Match it to recurring short-term needs, watch the all-in cost, and keep your draws disciplined.