How a Business Line of Credit Works (and When to Use One)

A business line of credit works like a revolving credit facility: you're approved for a set limit, draw what you need, pay interest only on the drawn amount, and repay to restore your available credit. That cycle — borrow, repay, borrow again — is what makes it fundamentally different from a term loan, and far more useful for managing the uneven rhythms of running a business.

This guide walks through exactly how a business line of credit works — the draw process, how interest is calculated, repayment mechanics — with real numbers. By the end, you'll know whether it fits your situation and how to use one strategically.

What is a business line of credit?

A business line of credit is a revolving credit facility. A lender approves you for a maximum amount — say, $100,000 — and you can draw from that pool as needed. You only pay interest on what you've actually drawn, not the full credit limit. As you repay, the available credit replenishes.

Think of it as a working capital reserve on call. You don't pay for it unless you use it (setting aside any annual fees, which we'll cover below).

Unlike a term loan — which hands you a lump sum and starts the repayment clock immediately — a line of credit lets you control timing. Draw $20,000 in March to cover a slow-season payroll crunch. Repay it in May when receivables come in. Draw again in October to stock up before the holiday rush. The flexibility is the point.

How a business line of credit works — step by step

Step 1: Apply and get approved

You apply with a lender — a bank, credit union, or online lender — and provide financial documents: business bank statements, tax returns, and sometimes a profit-and-loss statement. The lender evaluates your creditworthiness, sets a credit limit, and establishes your interest rate.

Step 2: Draw funds when you need them

Once approved, you access funds through the lender's online portal, a dedicated account, or sometimes a physical card or check. The draw is typically transferred to your business bank account within one to a few business days. Some online lenders offer same-day or next-day funding.

Step 3: Pay interest only on what you draw

This is the mechanic most people misunderstand. If you have a $100,000 line and draw $25,000, you pay interest on $25,000 — not $100,000. That distinction matters a lot over the life of a credit facility.

Step 4: Repay the principal

Most lines of credit require you to repay drawn principal on a set schedule — monthly installments, or a lump sum by a stated date. Some lenders allow interest-only payments during a draw period, with principal due at the end. Terms vary; read them carefully before you draw.

Step 5: Available credit replenishes — draw again

As you repay principal, your available credit restores. That revolving cycle is what distinguishes a line of credit from a term loan. A $50,000 draw repaid in full brings your available balance back to your approved limit. This is why a line of credit works well for recurring, short-cycle cash needs.

Secured vs. unsecured business lines of credit

Business lines of credit come in two forms, and the distinction shapes both what you can borrow and what it will cost.

Secured lines of credit require collateral — business assets like inventory, accounts receivable, equipment, or real estate. The collateral reduces the lender's risk, which typically means lower interest rates, higher credit limits, and access to bank-level financing. The tradeoff: if you default, the lender can seize the pledged assets.

Unsecured lines of credit don't require specific collateral. Approval depends on your credit profile, revenue history, and overall financial health. They're faster to obtain and don't put specific assets on the line — but lenders charge higher rates to compensate for the added risk. Credit limits tend to be lower as well.

For most small businesses with solid credit and some operating history, an unsecured line is the common starting point. Secured lines make sense when you need a larger limit, have valuable assets to pledge, or are working with a bank that requires it.

Business line of credit vs. business loan vs. business credit card

These three products overlap in purpose but differ sharply in structure. Here's how they compare:

A line of credit sits between the two. More flexible than a term loan — no lump-sum obligation, no paying interest on money you're not using — and it typically offers higher limits and lower rates than a business credit card. Its limitation: it's built for short-term revolving needs, not long-term capital investment.

When to use a business line of credit (and when not to)

Good fits

• Working capital shortfalls. When your working capital dips below what you need to cover day-to-day operations — payables, payroll, overhead — a line of credit fills the gap without requiring a new loan application each time.
• Cash flow gaps. Your invoices are net-30 but your suppliers want payment now. A line bridges that timing mismatch without costing you the relationship.
• Payroll in slow months. Seasonal businesses — landscapers, retailers, restaurants — often face months where revenue dips below operating costs. A line lets you make payroll without draining reserves.
• Seasonal inventory. A gift retailer stocking for Q4, or a contractor buying materials for a spring rush, can draw, stock up, and repay once sales come in.
• Unexpected expenses. Equipment breaks. A pipe bursts. A key supplier changes terms. A line of credit is a better financial cushion than liquidating assets or maxing a credit card.
• Bridging a short-term opportunity. A contract comes in that requires upfront labor or materials before you're paid. A draw covers the gap while you deliver.

Poor fits

• Major equipment purchases. Equipment financing or a term loan matches the loan term to the asset's useful life — that structure makes more sense than drawing and redrawing on a revolving line.
• Real estate. Use a commercial mortgage or SBA 504 loan. A line of credit isn't structured for long-duration, large-balance real estate debt.
• Long-term expansion capital. If you need $500,000 to open a second location, a term loan or SBA 7(a) loan gives you the amortization period and structure that fits. Repeatedly drawing that amount on a revolving line would be expensive and operationally awkward.

How much can you borrow?

Credit limits on business lines of credit range from as little as $5,000 to over $1 million. The practical range for most small businesses falls between $10,000 and $250,000.

Lenders set your limit based on several factors:

• Annual revenue. Many lenders size a line as a percentage of your annual revenue — often 10%–20%.
• Cash flow. Consistent monthly bank balances signal repayment capacity. Lenders look for predictable inflows relative to your draws.
• Credit profile. Both your business and personal credit scores factor in, especially for early-stage businesses that don't yet have a deep credit history.
• Collateral (for secured lines). Higher-value assets support higher limits.

Once you've established a track record of drawing and repaying responsibly, many lenders will entertain a credit limit increase.

Requirements to qualify for a business line of credit

Requirements vary significantly by lender type. Here's a realistic baseline for each:

Banks and credit unions

• Personal credit score: 680 or higher
• Time in business: 2+ years
• Annual revenue: $250,000 or more
• Full documentation: tax returns, profit-and-loss statement, balance sheet

Online lenders

• Personal credit score: 600 or higher
• Time in business: 6 months to 1 year
• Annual revenue: $50,000–$100,000+
• Bank statements (typically 3–6 months)

Online lenders move faster — often days vs. weeks — and have lower thresholds, but they charge higher interest rates. Banks offer better rates to businesses that can clear the higher bar. Neither is universally better; the right choice depends on your profile and how quickly you need access to capital.

If your credit is thin or your business is newer, some lenders will require a personal guarantee — you become personally responsible for the debt if the business can't repay it. That's worth understanding before you sign.

Costs and fees to watch

Interest rate is only part of the cost picture. Before you accept a line of credit, review the full fee schedule:

• Annual or maintenance fee. Some lenders charge a recurring fee — often $100–$500 per year — to keep the line open, whether or not you draw on it.
• Draw fee. A charge each time you access funds — sometimes a flat fee, sometimes 1%–2% of the draw amount. These add up if you draw frequently.
• Inactivity fee. Some lenders penalize you for not using the line within a set window (typically 3–6 months). If you're holding the line as an emergency buffer, check for this.
• Origination fee. A one-time upfront fee when the line is established, typically 1%–3% of the credit limit.

Variable vs. fixed rates. Most business lines of credit carry variable rates tied to a benchmark — often the prime rate. When market rates rise, your borrowing cost rises with them. If you're carrying a balance during a rising-rate environment, your monthly interest payments increase. Factor this into your planning.

The total cost of capital — APR plus all fees — is what you should compare across lenders, not just the headline rate.

How to get a business line of credit

The process is more straightforward than many owners expect. Here are the practical steps:

1. Check your credit. Pull your personal credit report (free at AnnualCreditReport.com) and your business credit report. Dispute any errors before applying — they can cost you on rate or approval.
2. Gather your documents. Most lenders want 3–6 months of business bank statements, your most recent business tax return, and basic financial statements. Have these ready before you apply.
3. Know your number. Decide how large a line you realistically need — and how much you could comfortably service if you drew the full amount. Don't apply for more than you need.
4. Compare lenders. Banks offer lower rates; online lenders offer speed and more accessible qualifying criteria. The right match depends on your credit profile, how long you've been in business, and how urgent your need is.
5. Apply and review the offer. With online lenders, decisions often come within hours to a few days. Banks may take weeks. Before you accept, read the full terms — rate, fees, draw structure, repayment schedule, and any personal guarantee requirements.

Related guides

Compare other ways to fund your business: SBA loans for long-term, lower-cost capital, a merchant cash advance when you need cash fast, or invoice financing to unlock cash tied up in unpaid invoices.