Business loan vs overdraft | Key differences explained - NAB

Key differences between a business loan and overdraft

Learn the difference between business loans and overdrafts, including how they work, their costs and how they can support different business funding and cash flow needs.

A business loan provides a fixed amount of money upfront, which you repay in structured instalments over time.

A business overdraft is linked to your business transaction account, allowing you to withdraw funds as needed to an approved limit.

Understanding these differences can help you compare the ways each option may support your cash flow and business funding needs.

FeatureBusiness loanBusiness overdraft
Access to funds
Business loan
Lump sum upfront
Business overdraft
Withdraw as needed
Repayments
Business loan
Scheduled repayments
Business overdraft
Flexible repayments
Interest
Business loan
Charged on full amount
Business overdraft
Charged on used amount only
Best for
Business loan
Long-term investments
Business overdraft
Short-term cash flow
Predictability of repayments
Business loan
High
Business overdraft
Lower, varies with usage

How a business loan may support your business

A business loan is typically used for planned funding needs where the total cost is known upfront.

Common scenarios include:

  • Funding large, one-off investments such as equipment or vehicles
  • Financing fit-outs or business premises upgrades
  • Supporting expansion initiatives such as opening a new location
  • Investing in long-term growth projects aligned with expected revenue

How an overdraft may support your business

A business overdraft is typically used to manage day-to-day cash flow needs.

Examples include:

  • Bridging the gap between supplier payments and customer receipts
  • Covering short-term operational costs such as wages or inventory
  • Managing seasonal fluctuations in income
  • Handling unexpected expenses that arise during business operations

Can you have both a business loan and an overdraft?

Many businesses use both a loan and an overdraft to support different financial needs.

A loan can be used to fund longer-term investments, while an overdraft can help manage short-term cash flow fluctuations. Together, they can help separate growth funding from day-to-day operating liquidity, giving greater clarity over how funds are used.

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Costs to understand before you decide

Loans

  • Interest is charged on the full borrowed amount
  • May include upfront and ongoing fees
  • Costs are generally more predictable due to structured repayments

Overdrafts

  • Interest is charged on the amount used
  • Costs vary depending on how much of the limit is used
  • May include facility or account fees
  • Additional charges may apply if the limit is exceeded

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Terms and Conditions

The information provided in this article is intended to be of a general nature only. It has been prepared without taking into account your objectives, financial situation or needs. Before acting on the information in this article, National Australia Bank Limited (ABN 12 004 044 937, AFSL and Australian Credit License 230686) (NAB) recommends you consider whether it is appropriate for your objectives, financial situation and needs. NAB recommends that you seek independent advice before acting on any information in this article.

Lending criteria and terms and conditions apply (available on application).

Target Market Determinations for these products are available at nab.com.au/TMD.