Loss of opportunity damages compensate a business for a valuable commercial chance it lost because of someone else's breach of contract or misleading conduct. Australian law has accepted since Sellars v Adelaide Petroleum NL (1994) 179 CLR 332 that a chance to make money can itself be worth money, even when the outcome was never guaranteed.
For a small business the distinction matters. When a supplier lets you down or a competitor misleads your customer, the real loss is often not the invoice you paid. It is the profit you missed out on. This guide explains what loss of opportunity damages are, what you must prove to recover them, how a court puts a dollar value on a chance, and where claims commonly go wrong.
The article covers:
- What counts as a lost opportunity: the real and substantial chance test
- Which claims can carry it: breach of contract and the Australian Consumer Law
- How courts value the chance: the expected value method
- The common misconceptions: and why they cost businesses money
- When to get legal help: and what a lawyer actually does
What loss of opportunity damages are
The usual measure of damages for breach of contract puts the innocent party in the position it would have been in if the contract had been performed. That measure assumes the loss can be proven as a near-certainty, on the balance of probabilities. Loss of opportunity damages deal with the harder case: where the wrongful act destroyed a chance, and the outcome of that chance was never guaranteed.
The High Court confronted this in Sellars v Adelaide Petroleum NL (1994) 179 CLR 332. The court recognised that losing the opportunity to obtain a commercial benefit is itself loss or damage, compensable under the statutory damages provision that is now s 236 of the Australian Consumer Law (Cth). As Justice Brennan put it in that case, opportunities to acquire commercial benefits are frequently valuable in themselves, not only when they will probably turn into a financial return, but also when they offer a substantial prospect of one.
In contract, the position is even more direct. When a contract gives you the chance of a benefit and the other party's breach destroys that chance, the loss of the chance itself is compensable. The High Court confirmed in Tabet v Gett [2010] HCA 12 that in a contract case a plaintiff is entitled to damages for the loss of the promised opportunity, separate from any inquiry into what would have happened afterwards. The commercial interest lost is seen as valuable in itself.
What you must prove
Four elements decide a loss of opportunity claim:
- A real and substantial chance: the opportunity must be genuine, not speculative or fanciful. Evidence that makes a chance concrete includes being shortlisted for a tender, a history of repeat orders from the client, a written expression of interest, or heads of terms signed by the other side. A possibility that rests on hope, hearsay or "we might have won" will not do.
- Causation: the breach or contravention must be what cost you the opportunity. If the deal would have collapsed anyway because of market conditions or decisions made by the other side, the causal link is broken and the claim fails.
- The value must be measurable: the court must be able to estimate what the chance was worth. That usually means evidence of the profit you expected and the probability the opportunity would have materialised.
- Mitigation: you must take reasonable steps to reduce your loss, such as finding an alternative supplier or customer. Losses you could reasonably have avoided are deducted from any award.
Which claims can carry a loss of opportunity
There is no standalone "loss of opportunity" cause of action. The damages ride on top of another claim:
- Breach of contract: most loss of opportunity claims arise here. If a supplier fails to deliver stock in time for a seasonal launch, or a distributor walks away from an agreement that was your route into a new market, the breach may have destroyed a commercial chance that had real value.
- Misleading or deceptive conduct: section 18 of the Australian Consumer Law prohibits conduct in trade or commerce that is misleading or deceptive. If a competitor's false claims divert a key client away from you, or a supplier misrepresents its capabilities and the project falls over, s 236 of the Australian Consumer Law lets you recover the loss or damage the contravention caused, including the value of a lost opportunity. An action under s 236 must be started within six years of the cause of action accruing.
- Other civil wrongs: in some commercial settings courts have compensated lost opportunities in negligence, such as a professional adviser whose error cost a client the chance to win a tender. Whether such a claim is available depends on the circumstances, and a lawyer can assess the strength of yours.
How courts value the opportunity
Australian courts generally use an expected value approach. The calculation has two steps.
First, estimate the net profit the opportunity would have produced had it materialised. Second, discount that figure by the probability the opportunity would actually have come off. If a supplier's breach cost you a tender you expected to yield $300,000 in net profit, and the court assesses your chance of winning at 60 per cent, your compensable loss is assessed at $180,000, before any further adjustments.
Several adjustments apply on top:
- Net profit, not revenue: costs you would have incurred to earn the revenue are deducted.
- Contingencies: discounts can be applied for ordinary business uncertainty, such as supply problems or market shifts.
- Mitigation: any loss you avoided, or reasonably should have avoided, reduces the claim.
- No double recovery: the same loss cannot be recovered twice under different labels.
The evidence that carries the day is usually a combination of historical performance (margins, conversion rates, repeat purchase data), pipeline metrics (sales funnel probabilities, documented client commitments), comparable contracts inside or outside your industry, expert opinions on market conditions, and contemporaneous documents such as emails, proposals, tender feedback and board papers. Courts are used to imperfect data; the task is to build the most credible estimate available, not a perfect one.
A worked example: the supplier who shipped late
An outdoor furniture retailer orders its summer range under a contract with a delivery date of 1 October. The supplier ships late, and the stock arrives in early December, after the peak season has passed. The retailer's loss is not just the cost of storing and discounting the stock. It is the lost chance to sell the range at full margin during the peak window.
The retailer had sold out of the same range the previous summer, and had written orders from several regular customers who had already committed to buy. A court assessing the claim would ask whether there was a real and substantial chance the stock would have sold at full price, and how much net profit that chance represented. On the strength of the previous season and the written commitments, the court might find an 80 per cent chance of selling the range at full margin, and award 80 per cent of the expected net profit, less any amounts the retailer saved or earned by mitigating, for example by sourcing a smaller batch of substitute stock.
Notice what is doing the work: the historical data made the chance concrete, the written orders made it measurable, and the substitute sourcing kept the mitigation point alive. Without those records, the claim would have been dismissed as speculation.
Misconceptions that sink claims
A few misconceptions recur in this area, and each one can sink an otherwise good claim:
- "The chance has to be better than even": wrong. Sellars establishes that a real and substantial chance is compensable even where the probability of the benefit materialising is assessed at less than 50 per cent. The court discounts the value of the chance; it does not eliminate the claim.
- "It applies to any kind of harm": wrong. In Tabet v Gett [2010] HCA 12 the High Court declined to extend loss of chance reasoning to medical negligence and personal injury claims. The doctrine is confined to commercial and financial opportunities, where the chance itself can be valued like an item of property.
- "A consequential loss exclusion ends the claim": not necessarily. Whether a clause excluding "consequential loss" catches a lost opportunity depends on the clause's language and how the loss is characterised. Courts construe these clauses according to their terms, so the drafting and the factual context decide the point.
- "I need a signed contract": no. Misleading or deceptive conduct claims under the Australian Consumer Law need no contract at all, and informal agreements, including exchanges of emails, can support a contract claim where the parties intended to be bound.
- "A clause can exclude anything": not if it is unfair. An unfair term in a standard form small business contract is void under s 23 of the Australian Consumer Law, and penalties can now apply to relying on one. An exclusion of lost profits that is hidden, one-sided or disproportionate can be struck out.
When a lawyer is worth it
Loss of opportunity claims are won or lost on evidence and valuation, and the same is true of defending them. A lawyer's practical role includes:
- Assessing the chance: forming an early view on whether the opportunity was real and substantial, and whether causation can be shown against the background of the documents.
- Building or testing the valuation model: pressure-testing the probability figure and the net profit assumptions, and arranging expert accounting or market evidence where the numbers justify it.
- Reviewing the contract: identifying liability caps, consequential loss exclusions, notice conditions and exclusive remedies that shape what can be claimed, and checking whether any of them is vulnerable under the unfair contract terms regime.
- Checking time limits: a claim for breach of contract must generally be started within six years of the cause of action accruing, under s 14(1)(a) of the Limitation Act 1969 (NSW) and equivalent provisions in other states, and a damages claim under the Australian Consumer Law has a six year limit under s 236(2). Time limits are strict and fact-specific.
- Negotiating a resolution: most disputes settle, and a settlement needs to be documented so the releases, confidentiality and payment timing are clear.
For contract drafting, the same expertise protects you on the other side of the table. A liability cap tied to fees paid, a precisely worded exclusion of lost profits and lost opportunities rather than a vague "consequential loss" label, liquidated damages that are a genuine pre-estimate of loss rather than a penalty, and clear notice procedures all make loss of opportunity risk predictable. Updating those clauses as your business and its risk profile change is part of keeping them effective.
The question your business should be able to answer
If a key deal collapsed tomorrow, could you show a court what that chance was worth and why it was real? Most loss of opportunity claims fail not because the law is against the business, but because the evidence was never captured while the opportunity was live. Pipeline commitments left in phone calls, margin data kept only in a head, and proposals deleted after the deal died are the difference between a claim worth pursuing and a claim dismissed as speculation.
The practical habit is cheap: record client commitments in writing, keep your margins and conversion data current, preserve emails and tender feedback, and review your contracts for caps and exclusions while relationships are healthy rather than when a dispute has started. Loss of opportunity damages exist to compensate a genuine commercial chance. They reward businesses that treated the chance as valuable enough to document.