A reserve line of credit works like a revolving pool of money a lender preapproves for you: you draw what you need, pay interest only on the amount actually borrowed, repay it, and the credit refreshes so you can borrow again without reapplying. In consumer banking the same product often sits behind a checking account as automatic overdraft protection; in business finance it serves as a working-capital cushion for payroll, inventory, and uneven cash flow. The mechanics are nearly the same in both contexts.
How the Revolving Mechanic Works
A reserve line behaves more like a credit card than a term loan. The lender sets a maximum limit, you draw against it when you need cash, and every dollar of principal you repay goes right back into your available balance. A business 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 principal and the available balance jumps back to $85,000.
That is the core split from a term loan, where the bank hands you a lump sum and each payment chips the balance toward zero. A reserve line keeps refreshing for the life of the agreement, which makes it suited to short-term needs like bridging the gap between paying suppliers and collecting from customers. It is not designed for buying real estate or heavy equipment; a fixed-rate term loan with a longer horizon fits that job better.
On the consumer side, a reserve line tied to a checking account runs automatically. If the balance dips below zero, the line covers the shortfall so the debit swipe or bill payment clears, and you repay the advance with interest over the following billing cycle. U.S. Bank, for example, describes its Reserve Line as “an unsecured line of credit linked to a consumer checking account” that “provides automatic overdraft protection.”
What It Costs
Reserve lines almost always carry variable interest rates tied to an external benchmark, most commonly the Wall Street Journal prime rate, which sits at 6.75 percent as of early 2026. Your actual rate is quoted 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, sometimes within weeks.
Interest is only part of the picture. Several fees stack on top:
- Origination fee: a one-time charge when the line is set up, commonly 1 to 3 percent of the approved limit. Not every lender charges one. Chase waives origination on some business lines and charges 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 your limit you have not drawn, compensating the lender for reserving capital. Common range is 0.25 to 0.50 percent of the average unused balance, though some agreements go as high as 1 percent.
- Draw fee: a transaction charge on each withdrawal, often up to 3 percent of the amount drawn. Not every lender imposes one.
Add everything together when comparing offers. A line with a low interest margin but heavy fees can cost more than one with a slightly higher rate and no extras.
Qualifying for a Line
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 application. Bank of America’s unsecured business line generally wants a personal score above 700. Online and alternative lenders sometimes accept scores in the low 600s, but offset the 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 also want at least two years in business under current ownership, though strong revenue and cash flow can open doors for newer businesses. Navy Federal, for instance, asks for two years of business tax returns under existing ownership.
Unsecured lines rely entirely on the borrower’s creditworthiness, so they carry higher rates and lower limits. Secured lines are backed by collateral, often a blanket lien on inventory and accounts receivable. The lender calculates a borrowing base by applying an advance rate to eligible collateral; for receivables that advance rate typically runs 75 to 80 percent, so $100,000 in qualifying invoices 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 claim the pledged assets. UCC filings do not directly lower business credit scores, but they appear on business credit reports and future lenders may read them as cautionary. Stacking several UCC liens, especially old ones that were never released after repayment, can make additional financing harder to get.
Plan to produce at least two years of personal and business tax returns, current balance sheet and profit-and-loss statements, and a schedule of existing debt. Some lenders also want accounts-receivable aging reports and cash-flow projections, particularly for secured lines where the borrowing base needs periodic verification.
Drawing Funds and Making Payments
Once the line is open, draws are usually fast. Most lenders offer them through an online portal, ACH transfer, or a dedicated access card, and some issue checks tied to the line. Each draw cannot exceed your remaining available credit, and for asset-based lines the lender may require updated collateral reports before releasing funds.
Repayment is typically monthly. The minimum payment usually combines accrued interest on the outstanding balance plus a slice of principal, so the line gradually pays down even at the minimum. Every principal dollar repaid immediately replenishes available credit, which is what makes these lines useful for cyclical needs. A business can draw $50,000 to pay a supplier, collect the receivable a few weeks later, repay the draw, and have the full $50,000 available again.
The Annual Cleanup Requirement
Many lenders require an annual cleanup: a stretch of time, often 30 consecutive days, during which the outstanding balance must drop to zero. The point is to prove the line is financing short-term needs rather than quietly funding permanent operations. If a business can never pay the line off, even briefly, that signals it needs a term loan or more equity instead. The requirement has become less common over time but still appears in plenty of agreements, so read the fine print before signing.
Covenants, Default, and Personal Guarantees
A reserve line comes with contractual conditions beyond paying on time. These conditions, called covenants, are where most borrowers get tripped up because they do not realize they agreed to them.
Lenders commonly require borrowers 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 or exceeding spending limits. Violating any of these, even accidentally, is a technical default and can trigger real consequences even if no payment has been missed.
Most line-of-credit agreements include an acceleration clause. If you default, whether by missing a payment, breaching a covenant, or showing significant deterioration in financial condition, the lender can demand immediate repayment of the entire outstanding balance. A covenant breach can also trigger higher interest rates or tighter restrictions on the line even if the lender stops short of full acceleration.
For small and mid-sized businesses, lenders almost always require the principal owners to sign a personal guarantee. That means your personal assets, including savings, investment accounts, and potentially your home, are reachable if the business cannot repay. A personal guarantee turns a business debt into a personal one in default. Signing one is not a formality; it is the single most consequential piece of the agreement for most business owners.
When a Line Fits and When It Does Not
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, and handling an unexpected repair all fit the pattern. You are not paying interest on money you do not need, and you are not 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 new locations 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 the line down and never pay it off, lenders notice. The annual cleanup requirement exists for that reason. A business that cannot operate without a continuously drawn credit line probably needs an equity infusion or a restructured balance sheet, not more revolving debt.
SBA-Backed Lines as an Alternative
If you fall just short of a conventional line, the Small Business Administration guarantees a family of revolving credit programs called CAPLines under its 7(a) umbrella. The guarantee reduces lender risk and can translate into better terms for the borrower. CAPLines come in four variants targeting different needs: a Working CAPLine for asset-based revolving credit tied to receivables and inventory, a Seasonal CAPLine for seasonal buildups, a Contract CAPLine for costs tied to specific contracts, and a Builders CAPLine for construction or rehabilitation projects intended for resale.
The maximum loan amount across CAPLines is $5 million, and maturities can run up to 10 years for all types except the Builders CAPLine, which caps at five years plus the estimated construction timeline. Interest rates are capped under SBA rules; for variable-rate lines over $250,000, the maximum rate cannot 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, and the Working CAPLine in particular carries ongoing collateral-monitoring costs.