By Tera Loans Editorial · Published June 18, 2026
Business Line of Credit: How It Works and When to Use It
A business line of credit gives you revolving access to capital you draw only when you need it. Learn how it works, what it costs, and when to use one.
A business line of credit is revolving financing that lets you borrow up to a set limit, repay, and borrow again, paying interest only on what you actually draw. It works best for short-term, recurring, or unpredictable needs, such as covering payroll gaps, buying inventory, or smoothing seasonal cash flow, rather than financing a single large purchase.
That flexibility is the whole point. Unlike a term loan that drops a lump sum into your account and starts the interest clock on the full amount, a line of credit sits idle until you need it, costing nothing while undrawn. For owners who never know exactly when the next cash crunch will hit, that standby access is worth more than a fixed lump sum.
How does a business line of credit actually work?
A lender approves you for a maximum credit limit, say $50,000. You draw any amount up to that limit, and interest accrues only on the outstanding balance. As you repay principal, the repaid amount becomes available to borrow again. This revolving structure is the defining difference from a term loan.
Most lines have a draw period (often 12 to 24 months) during which you can borrow and repay freely, sometimes followed by a repayment period where the balance converts to fixed installments. Draws are typically transferred to your business checking account within one to three business days, and many lenders now fund same-day.
The core advantage
You pay interest only on the funds you draw, not your full approved limit. A $100,000 line with $20,000 outstanding costs you interest on $20,000. That makes a line of credit dramatically cheaper than a term loan for needs you cannot predict in advance.
Secured vs. unsecured: which type fits you?
Lines of credit come in two flavors. A secured line is backed by collateral, usually accounts receivable, inventory, or equipment, which lowers the lender's risk and typically earns you a higher limit and lower rate. An unsecured line requires no specific collateral but almost always comes with a personal guarantee, plus higher rates to offset the added risk.
Pros
- Borrow only what you need, when you need it
- Interest charged on the drawn balance, not the limit
- Reusable as you repay, no reapplying
- Ideal for seasonal or unpredictable cash flow
Cons
- Variable rates can rise over time
- Some lenders charge draw, maintenance, or non-use fees
- Lower limits than a comparable term loan
- Easy to over-rely on for recurring shortfalls
What does a business line of credit cost?
Pricing depends heavily on whether you go through a bank or an online lender, your credit profile, and whether the line is secured. Beyond the interest rate, watch for draw fees (a flat percentage each time you pull funds), monthly maintenance fees, and occasionally a non-utilization fee for leaving the line untouched.
| Lender type | APR range | Credit limits | Time to fund |
|---|---|---|---|
| Traditional bank | 8% - 16% | $25K - $500K+ | 1 - 4 weeks |
| SBA CAPLines | Prime + 2.25% to 4.75% | Up to $5M | 3 - 8 weeks |
| Online / fintech | 14% - 50% | $5K - $250K | 1 - 3 days |
| Credit-union line | 9% - 18% | $10K - $250K | 1 - 3 weeks |
Read the fee schedule, not just the rate
Two lines with the same APR can cost very different amounts once draw and maintenance fees are included. A 2% draw fee on frequent small pulls can quietly outweigh a slightly higher interest rate. Always ask for the full fee schedule before signing.
How much will a draw cost me each month?
If you treat a portion of your line like a short-term loan, it helps to model the payment before you draw. Use the estimator below to ballpark monthly cost on a given draw amount, then confirm exact figures with your lender, since variable rates and fees shift the real number.
Estimate your monthly payment
A representative estimate at 9%–36% APR. Actual rates and terms vary by business and product.
For a deeper model, the payment calculator lets you test different draw sizes and payoff timelines side by side.
When should you use a line of credit vs. other financing?
The right tool depends on whether your need is recurring or one-time, and whether you can predict it.
Recurring or unpredictable need? Use a line of credit
Payroll during slow months, restocking inventory ahead of a busy season, or bridging a gap while you wait on a big invoice. A business line of credit shines when timing and amount vary.
One large, planned purchase? Consider a term loan
Buying out a competitor, funding a renovation, or consolidating debt is better served by a fixed term loan with a predictable payoff schedule and often a lower rate on the full amount.
Buying equipment? Finance the asset directly
Equipment financing uses the machine itself as collateral, usually beating a line of credit on both rate and limit for that specific purpose.
Waiting on slow-paying customers? Factor the invoices
If the real problem is unpaid receivables, invoice factoring or a working-capital advance may unlock cash faster than waiting on a line draw.
If your need is broad and ongoing, general working capital financing or an SBA-backed option may fit. Note that SBA loans set baseline guidelines, but individual lenders add their own overlays, so terms and eligibility vary lender to lender.
How do you qualify for a business line of credit?
Lenders weigh time in business, revenue, and credit. Banks generally look for 680+ personal credit, two or more years operating, and consistent revenue. Online lenders relax those bars, often approving six months in business and scores in the low 600s, in exchange for higher rates.
To strengthen your application, keep clean financial statements, separate business and personal banking, and avoid maxing out existing credit before applying. A line you rarely touch but pay perfectly is a strong signal to lenders for future increases.
Don't use a line of credit to fund losses
A line of credit is a timing tool, not a solution to an unprofitable business. Borrowing month after month to cover recurring shortfalls compounds the problem. Use it to bridge gaps you can clearly repay, not to paper over a structural cash-flow deficit.
The bottom line
A business line of credit is one of the most flexible financing tools available to small businesses, precisely because you control when and how much you borrow. For seasonal swings, surprise expenses, and the day-to-day rhythm of cash flow, it is hard to beat. For a single large, predictable expense, a term loan or asset-specific financing usually wins.
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