What frustration actually is
Frustration is the law's answer to a narrow and genuinely unlucky situation: you made a contract, and then the world changed in a way that neither of you caused and neither of you provided for, and now the thing you agreed to do cannot sensibly be done at all.
Four things have to line up. The event has to happen after the contract was made. It has to be nobody's fault - you cannot frustrate a contract by your own actions and then rely on it. It has to make performance impossible, illegal, or radically different from what was undertaken. And it has to be something the contract did not already deal with.
The classic examples are as dramatic as they sound: the venue you hired burns down; the thing you agreed to do becomes a criminal offence; the ship you chartered is requisitioned. That is the register. Not "our costs went up forty per cent".
The bar, and why it is so high
The single most useful sentence in this area of law is the courts' insistence that it is not hardship, inconvenience or material loss that brings frustration into play. Something has to have happened that makes the obligation a different thing from the one that was agreed - not the same thing, done at greater cost or with more difficulty.
That distinction disposes of nearly every case in which frustration is raised. A supplier whose margins have been destroyed by exchange rates is performing the same contract, badly, at a loss. A builder who finds the ground harder than expected is building the same building, slower. Both are commercially miserable. Neither is frustrated.
Foreseeability matters too. If the event was one the parties could reasonably have seen coming, the law's view is that they had the chance to write a clause about it and chose not to. Silence in the face of an obvious risk is treated as accepting it, not as an oversight to be corrected later.
Frustration is not a bad bargain, a hard year, or a deal you regret. It is the contract becoming a different contract, through nobody's doing.
Why your force majeure clause matters more
Here is the practical point that gets missed, and it is the reason drafting beats litigating.
Frustration is a default. It fills a gap. If your contract contains a force majeure clause which covers what has actually happened, then the parties have already allocated that risk between themselves, and the clause is what governs - not the doctrine. That is usually a much better place to be, because a clause can do things frustration cannot: suspend obligations rather than kill the contract outright, give a right to terminate after a set period, apportion costs, require notice, keep the relationship alive while the storm passes.
Frustration has one blunt outcome: the contract is over, from that moment, for everyone. Nobody gets to choose. That is rarely what either party would have wanted if they had been asked in advance.
So if you are reading this because something has gone wrong, the first question is not "is this frustration?". It is "what does the contract say about this?" - and only if the honest answer is "nothing at all" does frustration become the conversation.
What happens to the money
Because frustration discharges the contract automatically, it can leave money and work stranded in awkward places - a deposit paid for a wedding that cannot happen, materials bought for a job that cannot proceed. The Law Reform (Frustrated Contracts) Act 1943 exists to sort that out, and it does three things.
- Sums paid before the frustrating event can be recovered, and sums that were due but unpaid stop being payable.
- A party who incurred expenses in performing before the event may be allowed to keep or recover a just amount to cover them, at the court's discretion.
- If one party received a valuable benefit before the event, the court can order them to pay a just sum for it.
The word doing the work in all three is just. This is not an accounting exercise with a right answer; it is a discretion, exercised on the facts. Which is one more reason the clause is better than the doctrine: a clause tells you what happens. The Act tells you a judge will decide what is fair.
Frequently asked questions
What is frustration of contract?
It is where an event after the contract was made, caused by neither party, makes performance impossible, illegal, or radically different from what was agreed. If it applies, the contract is automatically discharged from that point - it does not have to be terminated by anyone, and neither side is in breach.
Does a contract becoming more expensive count as frustration?
No. This is the most common misunderstanding. Increased cost, delay, difficulty or the disappearance of your profit margin are not frustration - you are still performing the same contract, just on worse terms than you hoped. The obligation has to have become something fundamentally different, not merely harder.
What is the difference between frustration and force majeure?
Force majeure is a clause you wrote; frustration is a doctrine the law applies when you did not. If a force majeure clause covers the event, it governs - and it can suspend obligations, allow notice, or permit termination after a period. Frustration has one outcome only: the contract ends automatically, whether or not that suits anyone.
What is the Law Reform (Frustrated Contracts) Act 1943?
It is the statute that deals with money and benefits once a contract has been frustrated. Sums paid can be recovered and sums due cease to be payable, but the court may allow a party to keep or recover a just amount for expenses incurred, and may require payment for a valuable benefit already received. It applies to most, though not all, commercial contracts.
Who decides whether a contract is frustrated?
Ultimately a court, on the specific facts. There is no notice you can serve to frustrate a contract and no box to tick - which is precisely why relying on it is risky. If you stop performing on the basis that the contract is frustrated and a court later disagrees, you are the one in breach.
Usually the clause, not the doctrine
Most of the time the answer is in the contract you already have, and the argument about frustration never needs to start. Silva reads what you signed, tells you what it actually does when things go wrong, and drafts the clause properly next time so this is a paragraph rather than a case.