Private Lending Legal Risks Victoria: Why Your Default Interest Rates Might Be Unenforceable

Private lending legal risks in Victoria have increased around a specific risk area: default interest provisions. A borrower in default has every incentive to challenge the enforceability of your default rate. If they succeed, you lose the premium that compensated you for the elevated risk of a distressed loan. Recent case law confirms that courts will strike down default interest provisions as penalties, even in commercial contexts between experienced parties.

The penalty doctrine sits awkwardly with commercial lending. Parties bargain freely. Borrowers accept terms with full knowledge. Yet courts retain the power to void provisions they consider punitive rather than compensatory. For private lenders and family offices operating in Victoria’s commercial property market, understanding how to structure and document default interest is no longer optional for prudent lenders. It is a matter of protecting returns you have lawfully contracted for.

The Penalty Doctrine and Private Loan Documentation Best Practices

Australian courts have long held that a contractual term requiring payment of a specified sum upon breach is unenforceable if it constitutes a penalty. The test, refined through decades of case law and confirmed by the High Court, focuses on whether the stipulated sum is out of all proportion to the party’s legitimate interests, rather than being limited to the greatest loss that could conceivably be proved to flow from the breach.

Default interest provisions attract particular scrutiny because they impose a quantifiable burden on the defaulting party. A court examining such a provision will consider whether the additional interest is proportionate to the legitimate interest the lender seeks to protect, or whether it operates as a punishment designed to coerce performance.

The burden initially rests on the borrower asserting the penalty defence. But here is the challenge: if the default rate appears sufficiently disproportionate on its face, the burden shifts to the lender to justify the provision. This shift occurs without the borrower needing to prove actual disproportion. The loan agreement itself becomes the primary evidence against you.

A significant default interest rate might seem unremarkable in the current private lending market. Commercial loans often carry base rates and default premiums that reflect the specific risk profile and the capital requirements of the transaction. Yet the question is not whether the rate seems reasonable to market participants. The question is whether the rate is proportionate to the legitimate interest the lender seeks to protect.

What Counts as a Legitimate Interest

Courts have accepted several categories of legitimate interest that can support a default interest provision:

• Increased credit risk: A borrower in default presents a materially higher probability of total loss. The lender’s exposure increases, and so does the cost of that exposure.
• Opportunity cost: Funds tied up in a non-performing loan cannot be deployed elsewhere. The lender loses the ability to earn returns on alternative investments.
• Administrative burden: Managing a defaulted loan requires additional resources. Collections activity, legal costs, and management time all increase.
• Funding cost increases: If the lender has borrowed to fund the loan, a default may trigger increased costs under the lender’s own facilities or require the lender to hold additional capital.

A challenge remains in proving these interests at trial, often years after the loan was written. Memories fade. Personnel change. The commercial rationale that seemed obvious at the time becomes difficult to reconstruct.

Documentation Strategies That Protect Your Position

A highly effective protection is contemporaneous documentation of the rationale for your default interest provision. This documentation should be created at or before the time of contracting, not after a dispute arises.

Credit Committee or Investment Committee Papers

If your lending operation uses a formal approval process, ensure that the papers presented to the decision-makers address the default interest rate specifically. The papers should explain:

• The base rate and how it was determined
• The default premium and the specific risks it compensates for
• Any borrower-specific factors that increase default risk
• Comparable rates in similar transactions

This creates a contemporaneous record that the default rate was considered, analysed, and approved as part of a commercial decision-making process.

Term Sheet Negotiations

If the borrower negotiated on the default rate, preserve the evidence. Emails showing the borrower sought a lower default rate, or accepted the rate after consideration, support the argument that the provision was a genuine bargain rather than an imposed penalty.

Recitals in the Loan Agreement

Consider including recitals that record the parties’ understanding of why the default interest provision exists. A recital stating that the parties acknowledge the default rate reflects the increased credit risk, opportunity cost, and administrative burden associated with a loan in default provides direct evidence of commercial purpose.

Recitals are not conclusive. A court may look behind them. But they create a presumption that the stated purpose was the actual purpose, and they place the burden on the borrower to prove otherwise.

Expert Evidence on File

For larger transactions, consider obtaining and retaining a brief analysis from a credit risk professional or economist explaining the basis for the default rate. This need not be elaborate. A one-page memo explaining that a significant default premium is consistent with the increased probability of loss and the cost of managing distressed debt can be powerful evidence if the provision is later challenged.

How to Protect Private Lenders Australia: Structural Alternatives

Beyond documentation, structural choices can reduce penalty risk. Some lenders have moved away from simple default interest provisions toward mechanisms that are less likely to be characterised as penalties.

Tiered Default Interest

Rather than a single default rate that applies immediately upon breach, a tiered structure imposes increasing rates over time. This structure reflects the commercial reality that risk and administrative burden increase as a default continues. For example, a lender might apply:

• Days 1 to 30 of default: base rate plus a modest additional margin.
• Days 31 to 90 of default: base rate plus an increased margin reflecting greater risk.
• Days 91 onwards: base rate plus a higher margin consistent with the risk of total loss.

This structure is designed to mirror the lender’s actual increasing exposure. It is harder for a borrower to argue that a modest initial premium

About Blaine HattieBlaine Hattie is a Principal in Commercial Transactions at Sutton Laurence King Lawyers. He advises businesses on transactions and finance with a special interest in technology, cybersecurity, digital media, defamation, and artificial intelligence.