Default Interest Clauses: An Explainer

Table of Contents

Share at:

What are default interest clauses?

Default interest clauses are terms in loan contracts that require the payment of a higher interest rate if the borrower defaults on their obligations under the loan agreement.

For example, in the case of Arab Bank Australia v Sayde Developments Pty Ltd (2016) 93 NSWLR 231 (Sayde), the loan agreement provided that if the borrower did not meet their minimum monthly repayment obligations, they would have to pay a further 2% interest on top of the regular interest rate on the loan.

Lenders can use these default interest clauses as a sort of deterrent, using the threat of the penalty of increased debt to encourage borrowers to comply with their obligations.

Why are they problematic?

However, this understanding of default interest clauses as a deterrent penalty has prevented their enforcement in the past.

English courts, such as the one in Dunlop Pneumatic Tyre Co Ltd v New Garage and Motor Co Ltd [1915] AC 79, define penalty provisions as terms that focus on on using the threat and fear of a penalty. Accordingly, the clause does not aim to recover the potential losses that might arise out of a breach, but rather imposes an extravagant penalty.

Australian courts have elaborated on this principle in cases such as:

Ringrow emphasised that the issue of penalties was not one of “mere disproportionality.” A penalty clause is not merely disproportionate, but “out of all proportion” in its extravagance. Likewise, Andrews emphasised the deterrent aspect of penalties. They are punishments that go beyond any calculable money compensation. Clauses are not penalties if there is no calculable compensation. Furthermore, Paciocco extended the scope of the “out of all proportion” requirement. Paciocco decided that a term is a penalty only if it is out of proportion with the interests that the lender is trying to protect. These interests can extend beyond direct compensation to other increased costs such as operational costs.

In summary, default interest clauses will be penalties where they are punishments that extravagantly go beyond the lender’s legitimate interests. Where a borrower proves that a term is a penalty, courts will refuse to enforce the clause. This, of course, includes default interest clauses.

When are they enforceable?

Accordingly, a default interest clause is enforceable if it is not a penalty, but instead bears a reasonable connection with the lender’s interests. Evidently, from the explanation above, merely drafting that a clause “is not a penalty” is not enough. Courts will consider the effect of the clause in light of the entire agreement at the date the contract was made.

For example, the default interest clause that raised the interest by 2% in Sayde was not a penalty as:

  • it was not intended to punish
  • 2% was not out of proportion with the interests of the lender

What should I do?

It should be clear that whether you intend on including a default interest clause or fighting a default interest clause, care is needed. As with most contractual disputes, outcomes depend heavily on each individual contract and situation. As always, consulting a contract lawyer earlier in the process can improve your chances of success.

Share at:

Simplify creating legal documents today

Browse through Lawpath's AI tools which can be used to draft, review and refine legal documents today!

Related Articles

Difference Between a General and Enduring Power of Attorney (2026 Update)

Which do you need: General vs Enduring Power of Attorney? This guide walks you through the differences and typical legal scenarios.

How to exit a Partnership Agreement

Learn how to exit a partnership agreement. Understand the essential steps for withdrawal, buy-outs, and business dissolution to ensure a smooth transition.

When Do You Need to Register for GST?

Learn when you need to register for GST in Australia, including turnover thresholds, rules for rideshare drivers, and voluntary registration benefits.

Can you Dismiss an Employee on Maternity Leave?

Dismissal while on parental or maternity leave in Australia is not always illegal, but it can be tricky due to strict legal protections. Consult our guide for more details.

What is Genuine Redundancy? (2026 Update)

No longer require an employee to do their job? Learn about genuine redundancy, your employees’ rights, and your business's obligations in this situation.

What is the Difference Between a Public and Private Company?

Which business structure is right for you: public vs private company? In Australia, this depends on several factors. Read our guide to learn more.