Business Line of Credit vs. Credit Card: Comparing Interest Costs

By Toyosi, Founder, NexTier Funding · Updated 2026-08-16

Advertiser disclosure: NexTier Funding may receive compensation if you apply for funding through links on this page. This does not influence our analysis or the options we describe. We are not a lender and do not make credit decisions. How we make money.

The Short Answer

For carrying a balance longer than a billing cycle, a business line of credit is usually cheaper than a business credit card. Lines of credit typically run in the high-single-digit to high-teens APR range for well-qualified borrowers, while business credit cards commonly carry 18%–29% APR once you stop paying in full each month. Cards win only if you pay the balance off before interest accrues.

How the Costs Actually Stack Up

The comparison isn’t just about the sticker APR — it’s about how each product charges you.

A business line of credit charges interest only on the amount you draw, usually calculated daily or monthly, for as long as the balance is outstanding. Many lines also have a draw fee or an annual/maintenance fee, but no interest at all if you don’t draw.

A business credit card gives you a grace period — typically 21-25 days after the statement closes — during which new purchases carry no interest if you pay the full statement balance. Once you carry a balance past that window, interest usually starts accruing on the full amount, sometimes including new purchases, depending on the card’s terms.

Here’s a simplified example assuming you need $20,000 for 6 months:

These figures are illustrative ranges based on common market pricing, not quotes for any specific lender or card. Your actual rate depends on your credit profile, time in business, revenue, and the lender or issuer’s underwriting.

If you want to run your own numbers against a specific balance and repayment schedule, the business loan payment calculator can help you see how a lower rate over a longer draw period compares to a card balance sitting at a higher rate.

Where Each Option Gets Expensive

Credit cards get expensive when you carry a balance month after month. The grace period disappears once you’re carrying debt, and interest often compounds daily. A $10,000 balance at 24% APR costs roughly $200/month in interest alone if untouched — and minimum payments barely dent the principal, stretching payoff time and total cost.

Lines of credit get expensive when you draw the max and let it sit. Interest is cheaper per dollar, but some lines have monthly maintenance or unused-line fees, and variable rates tied to a benchmark (like prime) can climb if that benchmark rises. Renewal terms also matter — some lines require an annual review, and if your financials weakened, you could face a lower limit or a rate bump at renewal.

Both products can also carry a personal guarantee, meaning you’re personally on the hook if the business can’t pay. That’s true whether it’s a card or a line — see do business loans require a personal guarantee for how that works in practice. Some secured lines of credit also attach a UCC lien to business assets; if you’re unfamiliar with what that means for your business, this explainer on UCC liens breaks it down.

Fees Beyond the Interest Rate

Interest rate is only part of the cost. Here’s what else to check before comparing:

• Draw fees — some lines charge 0.5%–2% each time you pull funds.
• Annual or maintenance fees — common on both cards and lines, typically $0-$500/year depending on the product.
• Cash advance fees — if you use a credit card for cash rather than a purchase, expect an added fee (often 3%-5%) plus a higher APR than purchases.
• Late fees and penalty APRs — a single late payment on a card can trigger a penalty rate that’s significantly higher than your standard APR and may stay in effect for months.
• Foreign transaction fees — relevant if you pay overseas vendors on a card.

None of these are trivial. A line of credit with a 1% draw fee and 10% APR can still beat a no-annual-fee card sitting at 26% APR the moment you can’t pay it off monthly.

Which One Fits Your Situation

This isn’t a universal answer — it depends on how you plan to use the funds and how fast you can repay.

A business credit card tends to make sense when:

• You can pay the statement balance in full most months
• You want simple, fast access for small recurring purchases
• You’re building or need to keep using existing personal or business credit history

A business line of credit tends to make sense when:

• You expect to carry a balance longer than one billing cycle
• You need a larger available limit than most cards offer
• You want predictable interest costs tied only to what you draw

For a deeper side-by-side on how these tools behave for day-to-day cash flow gaps versus one-time needs, see business loan vs. business credit card for cash flow. If a revolving line sounds like the better fit, business line of credit covers how approval and draw terms typically work.

Bottom Line

If you’re going to carry a balance past a single billing cycle, the math almost always favors a line of credit over a credit card — the APR gap alone usually outweighs any extra fees. If you’re disciplined about paying in full monthly, a card’s grace period can make it effectively free financing. The right choice comes down to your repayment timeline, not just the advertised rate.

This article is for general information, not financial advice — your actual costs will depend on your credit profile and the specific product you’re offered. If you want to see what rates and terms you might realistically qualify for, you can check your eligibility in a few minutes without affecting your credit.

Sources

• Federal Reserve Small Business Credit Survey
• Federal Reserve - Consumer Credit (G.19)
• FTC - Business Credit and Financing