Why can a fibreglass pool builder ask for a 20% deposit?
You have read that Queensland caps pool deposits at 5%, your fibreglass builder has asked for 20%, and it looks like a plain breach of the contract. It usually is not. A third figure in the deposit rules turns on where the work happens rather than on the price, and it covers contracts where most of the value is made off-site — the definition of a moulded shell, whose on-site work is little more than the excavation and a crane lift. Concrete is the opposite case.
Queensland caps the deposit at 5% where the contract price is $20,000 or more and 10% below it — but it rises to 20% for a contract of any price where the value of work performed off-site is more than 50% of the contract price. A moulded fibreglass shell is made off-site.
The short answer
- Three caps, not two: 10% under $20,000, 5% at $20,000 or more, and 20% where more than half the contract value is work performed off-site.
- The off-site exception is price-independent — it applies to a contract of any price, which is why it overrides the 5% cap on a large job.
- A moulded fibreglass shell is manufactured in a factory, so a fibreglass contract is the archetypal case the exception was written for.
- It is not automatic. The test is the value of off-site work against the contract price, and on a full turnkey job with paving, fencing and landscaping the shell may be well under half.
- Deposit caps apply before work starts on site. After that, progress payments must be proportionate to work actually completed on site.
| Contract situation | Maximum deposit | Typical pool example |
|---|---|---|
| Contract price under $20,000 | 10% | A barrier replacement, a small spa, a resurfacing job |
| Contract price $20,000 or more | 5% | Most concrete pool builds — the shell is built in your backyard |
| Any price, off-site work more than 50% of contract price | 20% | Supply-and-install of a moulded fibreglass shell, where the shell dominates the price |
| Fibreglass shell plus extensive paving, fencing and landscaping | 5% if off-site value is not more than half | A turnkey fibreglass package — the exception may not be met |
| Progress payments after the deposit | No fixed cap | Must relate to work progress on site and be proportionate to its value |
The three caps, and why the biggest contract gets the smallest one
The QBCC states the maximum deposit allowed before work starts on site as:
- 10% where the total contract price is less than $20,000;
- 5% where the price is $20,000 or more;
- 20% for a contract of any price where the value of the work to be performed off-site is more than 50% of the contract price.
The first two look inverted to most people, and they are worth pausing on: the bigger contract permits the smaller percentage. That is deliberate. The cap is protecting the absolute sum of your money at risk before anyone turns up, and 5% of $70,000 is already $3,500. Expressing the protection as a percentage that falls as the contract grows keeps that exposure roughly in the same range.
The third cap is not a variation on the first two. It is a different rule with a different trigger: not the price, but where the work happens. It applies to a contract of any price, which is exactly what makes it capable of displacing the 5% figure on a $60,000 pool.
Why the exception fits a fibreglass pool almost perfectly
Think about what you are buying when you buy a fibreglass pool.
The shell is laid up in a factory, on a mould, weeks before anyone visits your property. It is cured, finished and inspected there, then trucked to you and craned into a hole. The work at your address is the excavation, the crane lift, the backfill, the plumbing connection, the coping and the barrier. The single largest item of value in the contract was manufactured somewhere else.
That is what the exception describes. The rule is not about pools — it is a general rule for contracts where the builder has to pay for something substantial to be made before they can start on site. Prefabricated and modular work is the obvious category, and a moulded pool shell sits squarely in it.
So the reasonable-sounding advice “never pay more than 5% in Queensland” is wrong for a large share of fibreglass contracts, and it is wrong in a way that costs the consumer the deal rather than the money: a buyer who has read only the 5% rule reads a lawful request as a breach, accuses their builder, and starts the relationship badly.
Concrete is the opposite case. A concrete pool is built in your backyard — excavated, steel-fixed, sprayed, rendered and tiled on site. Very little of its value is produced off-site, so the exception will rarely be met and 5% is the number. That difference between the two materials is one more thing to weigh in choosing concrete or fibreglass.
How to check whether your contract actually qualifies
The exception is not a label a builder can apply because they sell fibreglass. It is a test against a number: is the value of work to be performed off-site more than 50% of the contract price?
The arithmetic moves with what is in your contract. Two worked cases:
Case A — supply and install. Contract price $48,000. The shell, delivered, is $26,000 of it. Off-site value is about 54% of the price, so the exception is met and a deposit of up to $9,600 can lawfully be requested.
Case B — turnkey. Same shell, same $26,000, but the contract also covers paving, a glass barrier, landscaping and a heat pump, taking the price to $79,000. Off-site value is now about 33%, the exception is not met, and the cap is 5% — $3,950.
The same pool, the same shell, and a deposit cap that differs by nearly six thousand dollars, decided entirely by how much else is in the contract. That is the part to check, and it is checkable by you with the contract in front of you.
So if you are asked for 20%, ask one polite question in writing: “Could you confirm the contract is relying on the off-site work exception, and what proportion of the contract price is work performed off-site?” A builder relying on the exception legitimately will answer it easily. It is also a useful question because it forces the number to be stated before you pay rather than argued about afterwards.
What the caps do not cover
Two limits worth knowing, because they are where deposit disputes actually end up.
The cap applies to the deposit — the money paid before work starts on site. After that you are into progress payments, and Queensland does not fix their number or timing. What it requires instead is that the amount claimed relates directly to work progress on site and is proportionate to, or less than, the value of the work the claim relates to. The QBCC's own illustration is blunt: you should not pay 50% until at least half the work is completed on site. A “shell delivery payment” of 40% claimed the week after the deposit is a progress payment question, not a deposit question, and the on-site value test is the one to apply.
And a lawful deposit is not a safe deposit. The cap limits the percentage; it does nothing about who you are paying. A 20% deposit to a licensed builder with a Queensland Home Warranty Scheme premium paid is a very different proposition from the same figure paid to an unlicensed one — residential construction work valued at more than $3,300 is covered by the scheme, but only where a licensed contractor performs the work. Check the licence first. Our guide to checking a pool builder's licence covers the registers.
If a deposit request looks wrong to you and this page has not resolved it, what to do about an excessive deposit request deals with that situation directly. And if you are still collecting prices, comparing quotes from several pool builders will show you quickly how differently the same pool is packaged — which, as above, is what sets the cap.
Common questions
Is a 20% deposit on a pool legal in Queensland?
Does the 20% cap apply to every fibreglass pool?
Can a concrete pool builder ask for 20%?
What can I do if the deposit asked for is above the cap?
Do deposit caps apply after work has started?
Sources
General information only, current at 2026-09-18. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.
Thinking about a pool?
Compare quotes from builders who work in your postcode. One form, no obligation.
Get my quotes