Parker Wells Pty Ltd v Lenn Financial Services Pty Ltd — Default interest clause void as a penalty, but guarantee and mortgages remain enforceable

Case
Parker Wells Pty Ltd v Lenn Financial Services Pty Ltd
Court
Supreme Court of Queensland
Date Decided
8 September 2026
Citation
[2026] QSC 207
Topics
Unconscionable conduct, loan guarantees, penalty clauses, mortgages

Background

In 2020, Parker Wells Pty Ltd obtained a $395,000 short-term bridging loan to buy a bulldozer for a new earthmoving business. The loan was arranged through a broker and an intermediary, and was secured by guarantees and mortgages from the company’s directors, family members, and David Wells, the father of one director. Mr Wells, who was financially unsophisticated and nearly illiterate, mortgaged his home as security.

The borrower later defaulted and could not refinance. After the bulldozer was sold and partial payments were made, the debt remained outstanding. The plaintiffs challenged enforcement of Mr Wells’s guarantee and mortgage as unconscionable, and contended that the contractual default-interest provision was an unenforceable penalty.

The Court’s Holding

Hindman J rejected Mr Wells’s unconscionable-conduct claim, both in equity and under s 12CB of the Australian Securities and Investments Commission Act 2001 (Cth). The pleaded case did not allege that the lenders knew of Mr Wells’s personal disadvantage, which was essential to the claim. The evidence also did not establish that the lenders had that knowledge, or that the matters said to be known through the intermediary put Mr Wells at a relevant special disadvantage.

The Court held, however, that the default interest clause was a penalty. Properly construed, the clause imposed interest of 5.65% per month during default—comprising the 2.15% standard rate plus a 3.5% higher rate. In light of separate contractual rights to recover default-related losses and expenses, the additional interest was grossly disproportionate to the lenders’ legitimate interests and predominantly punitive. The Court declared the default rate void and held that the standard 2.15% monthly rate applies during default. Final orders on possession of the mortgaged properties and costs were reserved.

Key Takeaways

  • A guarantor alleging equitable unconscionability must properly plead and prove the lender’s actual knowledge, or wilful blindness, of the guarantor’s special disadvantage.
  • Use of an intermediary did not establish the lenders’ knowledge of Mr Wells’s near-illiteracy or financial limitations on the pleaded case.
  • A default-interest uplift may be a penalty where the lender can separately recover its default losses and the uplift is out of proportion to its legitimate interests.

Why It Matters

The decision underscores the pleading and proof requirements for guarantors seeking relief from secured lending arrangements on unconscionability grounds. Personal vulnerability alone is insufficient without a properly established case that the lender knew of, and unconscientiously exploited, that vulnerability.

For lenders and drafters, the case is a warning that default interest must be assessed alongside indemnities and other recovery rights. A substantial uplift that duplicates recoverable losses may be unenforceable even in a high-risk bridging-loan market.

⬇ Download the original opinion (PDF)Archived from the court's official source.
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