A business line of credit is one of the most practical tools for managing cash flow because it lets you borrow only what you need, when you need it, and pay interest only on the amount you actually draw. Unlike a term loan that deposits a lump sum you repay on a fixed schedule, a line of credit is revolving: you have an approved limit, you pull funds as gaps appear, and as you repay principal that limit refills for the next time. That structure maps almost exactly to how cash-flow problems occur — payroll is due Friday but a big customer invoice does not clear until the 15th, or inventory has to be bought weeks before it sells. Used with discipline, a line of credit bridges those timing gaps without committing you to debt you do not need.
Key takeaways
- A business line of credit is revolving — you draw as needed, repay, and the limit refills for reuse.
- You pay interest only on the amount drawn, not on your full credit limit.
- It fits short-term, self-liquidating gaps: net-30/60 invoices, payroll timing, seasonal swings, and inventory buys.
- Cost scales with how long a draw stays outstanding, so quick repayment keeps it cheap.
- Product minimums commonly start around $10,000; some programs consider FICO scores of 500 and up.
- With alternative lenders, approvals can come in as little as 24 to 48 hours once documents are submitted.
- Lines can be secured (collateral, lower rates, higher limits) or unsecured (smaller limits, often a personal guarantee).
What a business line of credit is (and how it differs from a loan)
A line of credit gives your business a maximum borrowing amount — the credit limit — that you can access in whole or in part at any time during the draw period. You are not charged for the full limit; you are charged only on your outstanding balance. When you repay, the repaid principal becomes available to borrow again, which is why it is called revolving credit.
The distinction from a term loan matters for cash flow. A term loan is a one-time event: you receive, say, a lump sum and immediately begin paying interest on all of it, whether or not you deploy it right away. A line of credit is a standing facility you keep in reserve and tap on demand. For recurring, unpredictable, short-duration needs — the essence of cash-flow management — the revolving structure is far more efficient.
| Feature | Line of Credit | Term Loan |
|---|---|---|
| Funds delivered | Draw as needed, up to a limit | One lump sum upfront |
| Interest charged on | Only the amount drawn | Full loan balance |
| Reusable | Yes — refills as you repay | No — one-time |
| Best for | Recurring, short-term gaps | One-time, planned purchases |
| Repayment | Flexible, based on balance | Fixed schedule |
Lines of credit can be secured (backed by collateral such as receivables or inventory, often with lower rates and higher limits) or unsecured (no specific collateral, typically smaller limits and often a personal guarantee).
Why a line of credit fits cash-flow gaps so well
Cash-flow problems are rarely solvency problems. Most healthy small businesses are profitable on paper but run short at specific moments because money leaves before it arrives. A line of credit is designed for exactly that mismatch.
- Timing gaps between billing and payment. If you invoice clients on net-30 or net-60 terms, you have delivered the work and covered its costs weeks before you are paid. A draw covers the gap; the incoming payment repays it.
- Seasonal swings. Retailers, landscapers, tax preparers, and tourism businesses earn most revenue in a few months but pay rent and payroll all twelve. A line funds the slow season and is repaid from the busy one.
- Payroll continuity. Payroll is non-negotiable and lands on a fixed calendar that rarely aligns with customer payments. A line keeps employees paid without touching operating reserves.
- Inventory and supplier purchasing. Buying stock ahead of demand — or taking an early-payment discount from a supplier — ties up cash you recover only after the sale.
- Unexpected expenses. Equipment repairs, an insurance deductible, or an urgent restock do not wait for a good cash week.
The common thread: each is short-term and self-liquidating — the draw is repaid by a specific, foreseeable inflow. That is the ideal use of revolving credit.
How the cost works: interest, draws, and fees
Because you pay interest only on what you draw, the true cost depends on how much you borrow and how long the balance stays out — not on your total limit. Rates are usually variable and quoted as an annual rate, but interest accrues on the daily or monthly balance, so a draw repaid quickly costs very little.
Common fee structures include:
- Interest on the outstanding balance only.
- Draw fees — a small flat or percentage charge some lenders apply each time you pull funds.
- Maintenance or annual fees to keep the line open.
- Non-usage fees in some cases if a line sits entirely unused.
The example below shows how carrying period drives cost. Figures are illustrative and rounded, for example only — your actual rate and fees depend on your lender, profile, and terms.
| Draw amount (for example) | Assumed annual rate | Days outstanding | Approx. interest cost |
|---|---|---|---|
| $10,000 | 24% | 15 days | ~$100 |
| $10,000 | 24% | 30 days | ~$200 |
| $25,000 | 18% | 30 days | ~$375 |
| $25,000 | 18% | 60 days | ~$750 |
The takeaway: a line of credit rewards short carry. The faster the offsetting inflow arrives and you repay, the cheaper the bridge. Always confirm whether a rate is a simple annual rate or an APR that folds in fees, so you can compare offers on the same basis.
A realistic cash-flow example
Consider a small commercial cleaning company that bills clients on net-45 terms. It signs a new office contract that requires hiring two staff and buying supplies before the first invoice is ever paid. The numbers below are illustrative, for example only.
| Week | Event | Cash effect | Line balance |
|---|---|---|---|
| 1 | Buy supplies, onboard staff | -$8,000 (draw) | $8,000 |
| 2–3 | Cover two payrolls | -$6,000 (draw) | $14,000 |
| 7 | Client pays first invoice | +$20,000 | $0 |
| 8 | Line fully repaid, limit restored | — | $0 |
The business never had $14,000 of idle cash sitting in the bank, and it did not take a lump-sum loan it would keep paying interest on. It drew exactly what the contract required, carried the balance for a few weeks, and repaid from the invoice it was waiting on. Interest applied only to the drawn amounts for the weeks they were outstanding — a small, predictable cost for winning the contract.
Qualifying and what lenders look at
Requirements vary widely between banks, credit unions, and online lenders. Banks typically want stronger credit, more time in business, and more documentation in exchange for lower rates; online and alternative lenders move faster and accept a wider range of profiles, often at higher cost. Common factors:
- Time in business — many lenders want at least six months to a year of operating history.
- Revenue — consistent monthly deposits that show ability to repay.
- Credit profile — some programs consider a personal FICO of 500 and up, though stronger scores unlock better pricing and higher limits.
- Bank statements — usually the last three to twelve months, to verify cash flow.
- Business documentation — entity formation, ownership, and sometimes tax returns or financial statements for larger lines.
Product minimums commonly start around $10,000. With alternative lenders, approvals can come in as little as 24 to 48 hours once documents are in. No responsible lender can promise you will qualify — approval and terms always depend on your business and credit profile — so treat any offer of a guaranteed approval as a warning sign.
Using a line of credit responsibly
A line of credit is a bridge, not a substitute for revenue. The businesses that benefit most treat it as a short-term tool tied to a known repayment source, and they keep a few habits:
- Match each draw to an inflow. Before you borrow, know what specific payment or sale will repay it and roughly when.
- Repay quickly. Because cost scales with carrying time, paying down as soon as the offsetting cash lands minimizes interest and frees the limit for the next gap.
- Do not fund losses with it. A line covers timing gaps, not a business that is structurally spending more than it earns. Persistent reliance on the line to make payroll is a signal to fix the underlying model.
- Keep headroom. Running the line at its limit leaves no cushion for a true emergency. Aim to keep some availability in reserve.
- Read the terms. Understand the rate type, draw and maintenance fees, and how repayments are applied before you draw.
Used this way, a line of credit turns cash-flow timing from a recurring crisis into a routine, manageable part of running the business.
Frequently asked questions
How is a business line of credit different from a term loan for cash flow?
A term loan gives you one lump sum you repay on a fixed schedule, and you pay interest on the entire amount from day one. A line of credit lets you draw only what you need, when you need it, and charges interest only on the outstanding balance. As you repay, the limit refills. For recurring, short-term cash-flow gaps, the revolving structure is more efficient because you are not paying to hold money you have not deployed.
Do I pay interest on my whole credit limit?
No. You pay interest only on the amount you have actually drawn and while it remains outstanding. If you have a $50,000 limit and draw $10,000, interest applies to the $10,000 balance, not the full limit. Some lenders also charge draw fees or a maintenance fee, so review the fee schedule alongside the rate.
What can I use a business line of credit for?
It is best suited to short-term, self-liquidating needs — covering payroll while you wait on customer payments, bridging net-30 or net-60 invoice terms, funding a slow season repaid by a busy one, buying inventory ahead of demand, taking supplier early-payment discounts, or handling an unexpected expense. Each of these is repaid by a specific, foreseeable inflow, which is the ideal use of revolving credit.
What do I need to qualify?
Requirements vary by lender, but common factors include time in business (often at least six months to a year), consistent monthly revenue, bank statements from the last several months, and a credit profile — some programs consider personal FICO scores of 500 and up. Stronger credit and longer history generally unlock lower rates and higher limits. Product minimums commonly start around $10,000.
How fast can I get approved?
It depends on the lender. Banks typically take longer and require more documentation in exchange for lower rates. Alternative and online lenders move faster — approvals can come in as little as 24 to 48 hours once your documents are submitted. No lender can promise approval in advance; terms always depend on your business and credit profile.
Is it a good idea to rely on a line of credit for ongoing operations?
A line of credit is meant to bridge timing gaps, not to replace revenue. It works well when each draw is matched to a known upcoming inflow and repaid quickly. If you find yourself drawing on it every month just to cover normal operating costs with no clear repayment source, that usually signals an underlying issue with the business model that credit will not fix. Keep some availability in reserve for genuine emergencies.
