How a Business Line of Credit Actually Works (Draw Period, Rates, Repayment)

Advertiser disclosure: BizBee is reader-supported. When you apply through some of the links on this page, we may earn a commission at no extra cost to you. It never changes what we recommend or how we rank options. See our affiliate disclosure and how we make money.

A business line of credit works like a reusable pool of money: a lender approves you for a credit limit, you draw only what you need when you need it, you pay interest only on the amount you’ve actually borrowed, and as you repay, that credit becomes available again. That’s the whole idea in one sentence — but the parts that actually decide whether it’s a good deal for you live in the details: the draw period, how interest is calculated, and whether the line is secured or unsecured.

I spent years on the lender side reviewing these applications, and the thing owners misunderstood most wasn’t whether to get a line of credit — it was how it actually behaves once they had one. People expected it to work like a term loan (one lump sum, fixed payments) or like a credit card (swipe and forget). It’s its own thing. Below I’ll walk through the mechanics the way I’d explain them to a borrower across the desk: what “revolving” really means, how the draw period and repayment work, the difference between a secured and unsecured line, and why the way the cost is quoted — an APR, not a factor rate — matters more than almost anything else.

If you’re still deciding whether a line of credit is even the right product, start with our comparison of a line of credit vs. the alternatives. This page is for understanding how the thing works once you’ve chosen it.

What “revolving credit” actually means

The single most important word in “business line of credit” is revolving. Revolving credit means your available credit replenishes as you pay down what you’ve borrowed — the same dollars can be used over and over.

Here’s the practical picture. Say you’re approved for a credit limit (your maximum). You draw part of it to cover a slow month. You now owe that amount and your available credit drops by the same amount. As you repay, your available credit climbs back up — and you can draw on it again, without reapplying. That’s the difference between a line of credit and a term loan, where you get one lump sum and, once you’ve repaid it, it’s gone unless you apply for a new loan.

This is why a line of credit is the right tool for uneven, recurring, or unpredictable cash needs — payroll through a slow stretch, inventory ahead of a busy season, the gap between paying a supplier and getting paid by a customer. You’re not borrowing a fixed amount once; you’re keeping a flexible buffer on standby and only paying for the part you use.

A quick distinction worth knowing: most business lines are revolving, but some lenders offer a non-revolving line, where the credit does not replenish as you repay — once you’ve drawn the full limit, the line is closed even if you pay it back. They behave more like a one-time pool. We go deeper on that in our draw period and repayment guide; for most owners shopping for “a business line of credit,” revolving is what’s meant.

How the draw period and repayment work

A business line of credit has a lifecycle, and the part that trips people up is the draw period.

The draw period is the window during which you can actually pull money from your line. During this time you can draw, repay, and draw again as much as you want up to your limit. Depending on the lender, you might make interest-only payments on your outstanding balance during the draw period, or you might make payments that include principal — this varies, so confirm it in your specific agreement.

When the draw period ends, the line typically moves into a repayment period (sometimes called the repayment phase), where you can no longer draw new funds and you pay down whatever balance remains, often on a set schedule. Some revolving lines renew instead — the lender reviews your account and resets the draw period if you still qualify. Which of these happens depends entirely on the lender and the type of line, so this is one of the first things to nail down before you sign. Our draw period and repayment guide walks through the full lifecycle.

One thing that catches people off guard: an unused line usually costs you little or nothing in interest (you only pay interest on what you draw), but some lenders charge a maintenance fee or a per-draw fee regardless of usage. That doesn’t make the line bad — it just means “no balance” doesn’t always mean “no cost.” Always read the fee schedule.

Secured vs. unsecured: do you need collateral?

A business line of credit comes in two flavors, and the difference affects both your rate and how hard it is to get.

A secured line of credit is backed by collateral — an asset the lender can claim if you don’t repay. That might be inventory, equipment, accounts receivable, or a cash deposit. Because the lender has something to fall back on, secured lines often come with lower rates and higher limits, and they can be easier to qualify for if your credit is thin.

An unsecured line of credit doesn’t require specific collateral. That sounds better on its face, and for many owners it is — but “unsecured” rarely means “no strings.” Most lenders still require a personal guarantee, meaning you’re personally on the hook if the business can’t pay, and some file a UCC lien (a general claim against business assets). Unsecured lines tend to have somewhat higher rates and stricter credit requirements, because the lender is taking on more risk. Whether a secured or unsecured line is “better” depends on what collateral you have and how your credit looks — there’s no universal answer. We break the trade-off down fully in our secured vs. unsecured guide.

The honest version I’d tell a borrower: don’t assume “unsecured” means you’re not personally liable. Read the personal-guarantee language. That’s the line that actually matters if things go sideways.

How interest is calculated: APR vs. factor rate

This is the part that costs people the most money when they get it wrong, so I want to be precise.

A legitimate business line of credit prices its cost as an interest rate, expressed as an APR — annual percentage rate. APR rolls the interest and (when applicable) certain fees into one annualized number, which is what makes it usable for comparison: a 15% APR and a 25% APR are directly comparable. On a line of credit, you’re charged interest only on your outstanding drawn balance, not your full limit — draw less, owe less interest.

A factor rate is a different animal, and it’s mostly used by products like merchant cash advances — not true lines of credit. A factor rate is a multiplier (you might see something quoted like a small decimal above 1.0) applied to the amount advanced, and the total cost is fixed up front regardless of how fast you repay. The problem: a factor rate looks small sitting next to no monthly interest, but converted into an annualized cost it is frequently far higher than a comparable APR — sometimes several times higher. To illustrate the gap: industry estimates put the effective APR on merchant cash advances roughly in the 40% to 350%+ range, depending on the factor rate and how quickly the advance is repaid (per Crestmont Capital / Clarify Capital analysis, 2026) — and because the cost is fixed, paying early only pushes that effective APR higher.

Why does this matter on a page about how a line of credit works? Because the marketing for these products is designed to blur the line. If a “line of credit” offer quotes you a factor rate instead of an APR, that’s a signal to slow down and ask what you’re actually being sold. A genuine line of credit should give you an APR. For the cost mechanics in depth — average rate and fee ranges, and a calculator — see our factor rate vs. APR breakdown and average rates and fees.

The mechanics at a glance

Here’s how the pieces fit together compared with the two products owners most often confuse a line of credit with.

How a line of credit compares with a term loan and a business credit card

Feature	Business line of credit	Term loan	Business credit card
Structure	Revolving — draw, repay, reuse	Lump sum, one time	Revolving, card-based
You pay interest on	Only what you draw	The full balance from day one	Balance you carry past the grace period
Cost quoted as	APR (interest rate)	APR (interest rate)	APR (interest rate)
Access to cash	Yes — draws to your account	Yes — lump sum up front	Limited; card networks, cash advance fees
Replenishes as you repay?	Yes (if revolving)	No	Yes
Best for	Ongoing/unpredictable cash flow	One-time fixed-cost purchase	Small recurring spend paid monthly
Collateral	Secured or unsecured	Secured or unsecured	Usually unsecured

Speed, rates, fees, and limits all vary by lender and your profile — confirm against the lender’s current terms. Not sure where to start? get matched with BizBee Funding → (affiliate).

For the full side-by-side against every alternative — SBA loans, invoice factoring, and merchant cash advances included — see our comparison pillar.

So how does it actually work, start to finish?

Putting the mechanics together, the lifecycle of a business line of credit looks like this:

1. You apply and get approved for a credit limit based on your revenue, time in business, and credit profile (secured lines may also weigh your collateral).
2. You draw funds as needs arise — transferred to your business bank account — up to your limit, whenever you want during the draw period.
3. You pay interest only on what you’ve drawn, quoted as an APR, plus any maintenance or draw fees the lender charges.
4. As you repay, your available credit replenishes (on a revolving line), so you can draw again without reapplying.
5. The draw period eventually ends — the line either renews after a lender review or moves into a repayment period where you pay down the remaining balance.

That flexibility — borrow only what you need, pay only for what you use, reuse it as you repay — is the entire reason a line of credit exists, and why it fits uneven cash flow better than a lump-sum loan.

The catch is that “the terms” aren’t one thing — limit, rate, fees, draw-period length, and whether it renews all vary widely between lenders. The only way to know how a line of credit will actually work for you is to see real offers against your own numbers.

When you’re ready to compare specific lenders, our lender reviews and our best business line of credit roundup go deeper on individual options.

Frequently asked questions

---

This article is informational and independent. BizBee does not lend money or broker loans. It is not financial, legal, or tax advice — confirm any product’s current terms with the lender before applying. See our editorial standards and how we evaluate lenders.

About the author — Marcus Delaney is a former commercial loan officer who now writes about small-business financing. After years reviewing line-of-credit applications from the lender’s side — then borrowing as a small-business owner himself — he focuses on helping owners understand how these products actually work, without the jargon.

Reviewed by Elaine Vasquez for accuracy and YMYL compliance.