Liquidated Damages in Australia: Enforceability, Penalties and the Traps on Both Sides

Liquidated damages are the most litigated-about and least understood risk allocation device in Australian construction. Contractors routinely believe an aggressive daily rate must be a "penalty"; principals routinely believe a nominal rate caps their exposure. Both beliefs are wrong, both are expensive, and both trace to a version of the law that is a decade out of date. Here is the current framework — and where the real traps sit.

The modern test: legitimate interests, not pre-estimates

Two High Court decisions rebuilt the penalties doctrine. Andrews v Australia and New Zealand Banking Group Ltd [2012] HCA 30 held the doctrine is not confined to sums payable on breach — a collateral stipulation imposing additional detriment on failure of a primary stipulation can be a penalty even where that failure is not a breach. Substance over form.

Paciocco v Australia and New Zealand Banking Group Ltd [2016] HCA 28 then reset the test itself. The question is no longer whether the sum is a "genuine pre-estimate of loss". A stipulation is penal only where it is out of all proportion to the legitimate interests of the party it protects — Kiefel J (French CJ agreeing) adopting the Cavendish formulation, with Gageler J framing it as a negative incentive so disproportionate it amounts to punishment. Two consequences matter enormously for construction:

• Legitimate interests extend beyond recoverable damages. In Paciocco itself, the bank's operational costs, provisioning and regulatory capital counted even though none would have been recoverable as damages. A principal's interest in timely completion can legitimately reflect financing exposure, pre-sale settlement risk, reputational and portfolio consequences — not merely the rent it could prove.
• The onus is on the challenger, and it is heavy. The standard is "out of all proportion" / extravagant — mere disproportion to the loss actually suffered is not enough.

What the construction cases show

The construction cases, before and after Paciocco, run one way. In Grocon Constructors (Qld) Pty Ltd v Juniper Developer No 2 Pty Ltd [2015] QSC 102 (affirmed [2015] QCA 291), daily LD rates rising to $59,000 were upheld: the clause operated on the single obligation to achieve practical completion and protected the developer's pre-sale settlement interests. In Growthbuilt Pty Ltd v Modern Touch Marble & Granite Pty Ltd [2021] NSWSC 290, LDs of $3,500 a day on a $60,500 subcontract — yielding an award of $427,000, seven times the subcontract sum — were upheld: the subcontractor bore the onus and could not show the rate was extravagant against the greatest conceivable loss judged at contract date.

The rare successful challenge proves the rule. In Spiers Earthworks Pty Ltd v Landtec Projects Corporation Pty Ltd (No 2) [2012] WASCA 53 (a 2 to 1 decision: [40], [64]), LDs failed because, assessed at the date of contract, the developer could suffer no loss from delay until an unsatisfied subdivision condition was met: a structural mismatch between the rate and any conceivable interest, not merely a high number.

So the practical reality: a considered LD rate on a commercial construction contract, set by parties able to take advice, is very hard to dislodge. Courts say so almost explicitly — they are reluctant to relieve sophisticated parties of their bargains.

The trap at the other end: nominal rates

The mirror-image error is the negotiation compromise of "$nil" or "$1 per day" LDs, assumed to mean delay costs nothing. Carbone v Fowler Homes Pty Ltd [2024] NSWCA 192 confirmed the settled Australian position: a nominal LD rate does not exclude general-law damages for delay unless the contract says so in clear words. The builder who ran 21 months late, on a schedule item completed at a token rate against the form's $1-a-day default, was exposed to the owners' proved rental loss. One owner recovered 63 weeks of lost rent ($31,500); the other recovered nothing, because his own late payments had triggered automatic extensions (Carbone at [139], [149]). The line runs from Baese Pty Ltd v RA Bracken Building Pty Ltd (1990) 6 BCL 137 through J-Corp Pty Ltd v Mladenis [2009] WASCA 157 — and it is the opposite of the English Temloc reading people half-remember. A "$nil" item changes the remedy from liquidated to general damages; it does not extinguish the risk.

Two related rules complete the picture. If an LD clause is struck down as a penalty, the principal is not remediless — general damages for proven loss remain available. And whether LDs are the exclusive remedy for delay is a separate construction question requiring clear words, whatever the rate.

What this means in practice

1. Principals: set the rate from the interests, and file the workings. A rate built from financing costs, supervision and overhead exposure, pre-sale or operational consequences — documented at contract date — is close to bulletproof under Paciocco. The contemporaneous build-up is both your drafting discipline and your evidence if challenged.
2. Contractors: price the rate, don't plan to beat it. The penalty challenge fails in almost every reported construction case. The real protections are the EOT regime (administered with the notice discipline we've written about elsewhere), the LD cap if you can negotiate one, and an accurate programme at tender.
3. Never write "$nil" intending "no liability". If the deal is that LDs are the sole remedy and the rate is zero, say both expressly: nominal rate plus clear exclusive-remedy words. Anything less leaves general damages at large (Carbone).
4. Check the machinery, not just the rate. LDs need a date to run from and a functioning certification process. Structural defects — no enforceable date, prevention without an operating EOT regime, miscertification — defeat more LD claims in practice than the penalty doctrine does. Two 2025 Court of Appeal decisions show it. Where the parties left the Date for Completion blank, the LD claim failed (XJS World v Central West Civil [2025] NSWCA 133 at [36]–[40]). Where an agreed later completion date was never documented as the contract required, LDs ran from the original date (Kaloriziko v Calibre (No 2) [2025] NSWCA 259 at [121]–[130]).
5. Caps and exclusive-remedy clauses are where the negotiation should happen. Post-Paciocco, arguing about enforceability is a poor substitute for negotiating the cap, the rate, and exclusivity up front: the three levers that actually determine delay exposure.

Key takeaways

• The test is Paciocco's: penal only if out of all proportion to the protected party's legitimate interests — which can exceed recoverable damages; the challenger bears a heavy onus.
• Construction LDs are rarely struck down (Grocon, Growthbuilt); the exceptions involve structural mismatch, not just big numbers (Spiers Earthworks).
• Nominal or $nil rates do not exclude general delay damages without clear words (Carbone, Baese, J-Corp).
• If a clause fails as a penalty, general damages survive — the doctrine polices the clause, not the loss.
• The commercial levers are the rate build-up, the cap and exclusivity — negotiated at contract, not litigated after.

This article is general information only and is not legal advice. For advice on a specific contract or dispute, seek legal counsel or contact Sumit Consulting for commercial and claims advisory support.