A reserve line of credit works like a preapproved pool of money you can borrow against whenever you need it, repay, and borrow against again, with interest charged only on the amount you’ve actually drawn. In consumer banking, that pool is usually linked to a checking account and kicks in automatically to cover overdrafts. In business finance, it functions as a working-capital cushion for payroll, inventory, and other short-term cash needs. The mechanics are essentially the same in both settings.
The Revolving Mechanic
The lender approves a maximum credit limit, and you draw against it on demand. Every dollar of principal you repay goes straight back into the available balance, ready to be borrowed again. A company with a $100,000 line that draws $20,000 pays interest only on that $20,000, with $80,000 still available. Repay $5,000 of that principal and the available balance climbs back to $85,000.
That’s the core difference from a term loan. A term loan hands you a lump sum, and each payment chips away at the balance until it reaches zero. A reserve line keeps refreshing itself for the life of the agreement. It’s designed for short-term needs like bridging the gap between paying suppliers and collecting from customers, not for real estate or heavy equipment.
On the consumer side, a reserve line tied to your checking account works automatically. If the balance dips below zero, the line covers the difference so the debit card swipe or bill payment goes through. You then repay the advance, usually with interest, over the following billing cycle.
Drawing funds is fast once the line is open. Most lenders offer draws through an online portal, ACH transfer, or a dedicated access card, and some issue checks tied to the line. Repayment is typically monthly. The minimum payment usually combines accrued interest on the outstanding balance plus a small slice of principal, so the line gradually pays down even at minimum payments.
What It Costs
Reserve lines almost always carry variable interest rates tied to an external benchmark. The most widely used benchmark is the Wall Street Journal prime rate, which as of early 2026 sits at 6.75 percent. Your actual rate is expressed as prime plus a margin. A well-qualified borrower with strong collateral might see prime plus 1 to 2 percent; a riskier profile could land at prime plus 5 percent or more. Because the rate floats, your interest cost rises and falls with Federal Reserve policy changes, sometimes within weeks.
Interest isn’t the only cost. Several fees can add up:
- Origination fee: a one-time charge when the line is established, commonly 1 to 3 percent of the approved credit limit. Not every lender charges one. Chase, for example, waives origination fees on some of its business lines while charging 0.15 percent on others.
- Annual or maintenance fee: a flat charge for keeping the line active regardless of usage. Chase’s annual fee runs $200 or 0.25 percent of the approved limit, whichever is greater, up to $750, and may be waived if you use at least 40 percent of your credit over 12 months.
- Unused line fee: a charge on the portion of the credit limit you haven’t drawn, meant to compensate the lender for reserving capital. Rates commonly fall between 0.25 and 0.50 percent of the average unused balance, though some agreements go as high as 1 percent.
- Draw fee: a small transaction charge each time you pull funds, often up to 3 percent of the withdrawn amount. Not all lenders impose them.
A line with a low interest margin but heavy fees can easily cost more than one with a slightly higher rate and no extras. Add everything together when comparing offers.
What Lenders Look At
Personal credit scores of the principal owners carry heavy weight. Wells Fargo typically expects guarantors to have a FICO score of at least 680 at the time of application. Bank of America’s unsecured business line generally requires a personal credit score above 700. Online and alternative lenders sometimes accept scores in the low 600s but offset the added risk with higher rates or smaller limits.
Revenue matters almost as much. Navy Federal Credit Union requires annual sales of at least $100,000 for its business line, and traditional banks often look for $150,000 to $250,000 or more. Most lenders want at least two years under current ownership. Navy Federal, for example, asks for two years of business tax returns under existing ownership.
Unsecured lines rely entirely on the borrower’s creditworthiness, so they tend to carry higher rates and lower limits. Secured lines are backed by collateral, often through a blanket lien on general business assets like inventory and accounts receivable. For accounts receivable, the advance rate typically falls in the range of 75 to 80 percent of eligible invoices, meaning $100,000 in qualifying receivables might support $75,000 to $80,000 in borrowing capacity. When a lender secures a line, it files a UCC-1 financing statement with the state to publicly establish its claim. UCC filings don’t directly lower business credit scores, but they appear on business credit reports, and stacked or unreleased liens can complicate future financing.
Expect to hand over at least two years of personal and business tax returns, current financial statements including a balance sheet and profit-and-loss report, and a schedule of existing debt. Secured lines often add accounts-receivable aging reports and cash-flow projections.
The Fine Print That Actually Bites
A reserve line comes with contractual conditions beyond making payments on time. These are called covenants, and they’re where borrowers get tripped up.
Lenders commonly require you to maintain minimum cash balances, hit revenue or profitability thresholds, or keep leverage and liquidity ratios within agreed limits. Some agreements restrict taking on additional debt, selling key assets, or paying owner distributions without lender approval. Positive covenants require action, like submitting monthly financial statements or maintaining insurance. Negative covenants restrict action, like changing ownership structure. Violating any of these, even accidentally, is called a technical default and can trigger consequences even when you’ve never missed a payment.
Most agreements include an acceleration clause. If you default, whether by missing a payment, breaching a covenant, or experiencing a significant deterioration in financial condition, the lender can demand immediate repayment of the entire outstanding balance. That converts a manageable revolving balance into a lump-sum obligation due right now. A covenant breach can also trigger higher rates or tighter restrictions short of full acceleration.
For small and mid-sized businesses, lenders almost always require the principal owners to sign a personal guarantee. Your personal assets, including savings accounts, investment portfolios, and potentially your home, are on the line if the business can’t repay. Don’t treat signing one as a formality. It’s the single most consequential part of the agreement for most business owners.
Many lenders also require an annual cleanup: a stretch of time, often 30 consecutive days, during which the outstanding balance must drop to zero. The purpose is to prove the line is financing short-term needs rather than quietly funding permanent operations. The requirement has become less common, but it still appears in plenty of agreements. Read for it before signing.
SBA-Backed Lines as an Alternative
If you’re close to but below the bar for a conventional line, the Small Business Administration’s CAPLines program is worth a look. CAPLines are revolving credit programs under the SBA 7(a) umbrella, meaning the SBA guarantees a portion of the loan and lender risk drops. There are four variants targeting working capital, seasonal needs, contract-specific costs, and construction for resale.
The maximum across CAPLines is $5 million. Maturity can extend up to 10 years for all types except the Builders CAPLine, which caps at five years plus the estimated construction timeline. Rates are capped under SBA rules: for variable-rate lines over $250,000, the maximum can’t exceed prime plus 3 percent, which works out to 9.75 percent at the current 6.75 percent prime rate. The trade-off is more paperwork and slower approvals than a conventional line, plus ongoing collateral monitoring on some variants.
When It’s the Right Tool
A reserve line works best for expenses that are recurring, unpredictable, or short-lived. Covering payroll while waiting on a customer payment, restocking inventory before a busy season, handling an unexpected repair. The revolving structure means you aren’t paying interest on money you don’t need, and you aren’t reapplying every time a new expense comes up.
A term loan is the better tool when you know exactly what you need and how much it costs. Equipment purchases, renovations, business acquisitions, and opening a new location all call for a lump sum with a fixed repayment schedule. Trying to fund a $200,000 buildout through a revolving line usually means higher interest costs and the risk of the lender freezing or reducing the line at the wrong moment.
The most common mistake is treating a line of credit as permanent capital. If you draw it down and never pay it off, lenders notice. The annual cleanup requirement exists precisely because banks want proof you aren’t dependent on the line to survive. A business that can’t operate without a continuously drawn credit line probably needs an equity infusion or a restructured balance sheet, not more revolving debt.