Business Loan vs. Line of Credit: Which Do You Need?

One structural difference drives everything

A term loan hands you the full amount once, and interest starts running on all of it immediately. A line of credit gives you permission to borrow up to a limit, and interest runs only on what you actually draw. Every practical difference between the two — cost, flexibility, discipline, risk — flows from that single distinction.

Neither structure is better in general. Each is better for a specific shape of need — and picking the wrong shape is what costs money, as the next example shows.

The interest math: a worked example

Suppose your business hits a cash crunch and you estimate you need about $20,000 to get through it. You're weighing two hypothetical offers — these numbers are illustrations, not market quotes:

• Option A: a $50,000 term loan at 11% APR over 3 years (you take the amount the lender approved, "to be safe")
• Option B: a line of credit at 14% APR, from which you draw only the $20,000 you need and repay over 12 months

Notice the line's rate is higher. Watch what happens anyway.

Option A — $50,000 term loan, 11% APR, 36 monthly payments. The standard amortization formula gives the monthly payment:

• Monthly rate: 11% ÷ 12 ≈ 0.9167%
• Payment: $50,000 × 0.009167 ÷ (1 − (1.009167)⁻³⁶) ≈ $1,637 per month
• Total repaid: $1,637 × 36 ≈ $58,930
• Total interest: about $8,930

Option B — $20,000 drawn on the line, 14% APR, 12 monthly payments.

• Monthly rate: 14% ÷ 12 ≈ 1.1667%
• Payment: $20,000 × 0.011667 ÷ (1 − (1.011667)⁻¹²) ≈ $1,796 per month
• Total repaid: $1,796 × 12 ≈ $21,549
• Total interest: about $1,549

The "cheaper rate" option costs roughly $8,930 in interest; the "more expensive rate" option costs about $1,549 — nearly six times less. The line wins not because 14% beats 11% (it doesn't) but because you borrowed $20,000 instead of $50,000 and repaid it in one year instead of three.

To be fair to the term loan: if you had borrowed only $20,000 at 11% over 3 years, the interest would be about $3,572 — better, but still more than double the line's cost, because the money is outstanding three times as long. And this cuts the other way too: if you genuinely needed all $50,000 up front, the line would be the wrong tool, since a $50,000 draw at 14% costs more than the same amount at 11%.

The lesson isn't "lines are cheaper." It's that interest cost = rate × amount outstanding × time outstanding, and structure controls two of the three variables. Model your own numbers — realistic draw, realistic repayment speed, plus any fees — in our line of credit calculator before deciding.

A decision framework in three questions

1. Is the need one-time or recurring?

• One-time (equipment, renovation, acquisition, buyout): term loan. You'll use every dollar immediately, so paying interest on the full amount is fair value.
• Recurring (seasonal inventory, payroll timing, invoice gaps): line of credit. One approval covers many episodes, and you pay only when the need is live.

2. Do you know the amount?

• Known amount ("the machine costs $85,000"): term loan. Borrow the number, not a guess.
• Unknown or variable amount ("slow season costs us somewhere between $10,000 and $30,000 depending on weather"): line of credit. A lump sum sized for the worst case means overpaying interest in every normal year.

3. When will the money be needed?

• Now, all at once: term loan.
• Maybe later, possibly in pieces: line of credit. An open, unused line costs little or nothing beyond any maintenance fee — a term loan taken "just in case" bills you interest from day one for insurance you may never use.

If you answered "one-time, known, now" — research term loans first. If you answered "recurring, variable, uncertain" — start with lines of credit. Mixed answers are common, which brings us to the next section. And if neither product feels right, the problem may be the category itself — our full comparison of business loan types covers five other structures, including equipment financing for asset purchases and invoice financing when slow-paying customers are the real issue.

When having both makes sense

Plenty of established businesses carry both, deliberately:

• The term loan funds the investment; the line protects operations. You finance a build-out with a term loan sized to the project, and keep a separate line for the cash-flow wobbles the construction period causes.
• The line handles timing; the loan handles growth. A distributor uses its line every quarter for inventory cycles and takes a term loan only when adding a warehouse.
• The line is the emergency layer. Opened when financials were strong, drawn rarely. One caution: most agreements let lenders reduce or freeze a limit if your finances weaken, so an unused line should be one layer of your safety plan, not the whole plan.

Lenders generally have no objection to this combination as long as your total debt payments fit your cash flow. What they will scrutinize is your capacity — see what lenders require and check your own debt-service numbers before applying for the second product.

Mistakes in each direction

Taking a term loan when you needed a line:

• Borrowing a "safe" round number and paying years of interest on the unused cushion — the exact trap in the worked example above.
• Re-borrowing for every seasonal cycle, paying origination fees and going through underwriting annually for a need a revolving line would cover with one approval.

Using a line when you needed a term loan:

• Financing a long-lived asset on a 12-month revolving line. The payment is punishingly high for the asset's payback period, or the balance never clears and rides at a variable rate for years.
• Funding permanent losses. Because draws are easy, a line lets a money-losing business avoid the real problem until the limit is exhausted — then the business has the same losses plus a maxed line.
• Treating the limit as your money. A drawn line is debt with a repayment clock, and a balance that never goes down is a term loan you never negotiated proper terms for.

In either direction: signing without converting the offer to total dollar cost, and skipping the fine print on fees and rate adjustments.

The bottom line

Match the structure to the shape of the need: lump sum for one-time, known, immediate; revolving for recurring, variable, uncertain. Run the real numbers — your amount, your repayment speed, actual fees — through the line of credit calculator, and when you're ready to look at actual offers, compare several funding providers rather than taking the first yes. The structure decision you make before applying will affect your total cost more than any rate negotiation after.