TL;DR

• Business lines of credit and 0% credit cards serve different capital strategies, even though both provide flexible funding.

• A business line of credit typically carries interest rates from 8–20%, depending on lender risk evaluation.

• 0% business credit cards can offer interest-free capital for 6–18 months, making them cheaper in the short term.

• However, lines of credit provide larger borrowing limits and longer repayment structures.

• The cheapest option depends on how quickly the capital generates revenue and how long the business needs the funds.

Why Businesses Compare These Two Funding Options

When entrepreneurs search for business funding, two products frequently appear:

• Business lines of credit

• 0% introductory APR business credit cards

Both options allow businesses to access capital on demand rather than receiving a single lump-sum loan. This flexibility makes them popular among founders who need funding for operations, marketing, inventory, or expansion.

However, while these two funding tools look similar on the surface, the cost structures behind them are completely different.

Understanding those differences can help entrepreneurs determine which option actually provides the lowest cost of capital for their situation.

How a Business Line of Credit Works

A business line of credit functions similarly to a revolving loan.

Instead of receiving a fixed loan amount, the borrower is approved for a maximum limit. Funds can be drawn from that limit as needed, and interest is typically charged only on the amount used.

For example, a business might be approved for a $100,000 line of credit but only draw $20,000 for a marketing campaign. Interest would apply only to that $20,000.

Typical characteristics of business lines of credit include:

• Revolving access to capital

• Interest charged on utilized funds

• Repayment flexibility

• Potential annual fees or draw fees

Interest rates can vary significantly depending on the lender, borrower profile, and economic environment.

In 2026, many business lines of credit fall between 8% and 20% APR depending on risk factors.

How 0% Intro APR Business Credit Cards Work

0% introductory APR credit cards operate under a different pricing model.

Instead of charging interest immediately, the lender provides a promotional interest-free period, typically lasting between 6 and 18 months.

During this promotional window:

• Borrowers can access capital

• Interest does not accumulate

• Minimum payments still apply

If balances are paid off before the promotional period ends, the effective cost of capital can be zero percent.

This is why many entrepreneurs consider 0% funding one of the most efficient ways to access short-term business capital.

However, after the promotional period ends, the account transitions to a standard APR which can range between 18% and 29% depending on the card issuer.

Comparing the True Cost of Capital

When comparing these two funding options, the most important question is not simply the interest rate, but how long the capital will be used.

Below is a simplified comparison.

If a business expects to repay capital quickly, the 0% APR option is usually cheaper.

But if capital is needed for a longer timeline, a line of credit may offer more stability.

Credit Limits and Capital Access

Another major difference between these funding tools involves how much capital can be accessed.

Credit cards typically offer smaller limits compared to institutional lending products.

Some entrepreneurs strategically combine multiple credit cards to increase total available funding, but this approach requires careful credit management.

Lines of credit are often preferred by businesses that need larger or recurring capital access.

Risk Considerations Entrepreneurs Should Understand

Every funding strategy carries risk.

With 0% credit cards, the main risk occurs when balances remain high after the promotional period ends. Once the introductory window expires, interest rates can increase significantly.

With lines of credit, the cost of borrowing begins immediately, which means businesses pay interest regardless of how quickly they deploy the funds.

For this reason, experienced founders often consider:

• Expected revenue from the capital

• How long funds will remain deployed

• Total financing cost over time

These variables determine which funding structure is actually cheaper.

When 0% Funding Makes the Most Sense

0% business funding tends to work best in situations where capital is used for short-term growth initiatives.

Examples may include:

• Marketing campaigns

• Inventory purchases

• Software implementation

• Hiring revenue-generating employees

If these initiatives produce revenue within the promotional window, businesses may repay the capital before interest begins.

This effectively transforms the credit line into interest-free working capital.

When a Business Line of Credit Is More Practical

Lines of credit often make more sense when businesses require longer-term financial flexibility.

For example, companies with fluctuating cash flow may use a line of credit to:

• Cover operational expenses during slow periods

• Smooth seasonal revenue cycles

• Manage ongoing working capital needs

While interest applies immediately, the predictable structure can provide stability for businesses that require continuous access to capital.

Final Insight: The Cheapest Capital Depends on Timing

There is no universal answer to which funding option is always cheaper.

Instead, the real cost depends on how capital is used and how quickly it can be repaid.

Entrepreneurs who use 0% credit strategically can access capital with little or no financing cost, but only if repayment occurs within the promotional window.

Meanwhile, lines of credit offer larger borrowing capacity and long-term flexibility, even though interest begins immediately.

The most financially sophisticated founders often combine both tools, using each funding structure for the situations where it performs best.