Is it legal for a builder to ask for a 50% deposit?
A 50% deposit is illegal for residential building work in every Australian state. Maximum legal deposits range from 5% to 10% depending on your state and the contract value.
You've finally found a builder who can start your renovation next month, but then the quote arrives with a demand for a 50% deposit to "secure materials and lock in pricing." Your gut says that's a lot of money to hand over before a single wall has been touched — and your gut is right.
Why high deposits are dangerous
When a builder asks for half the money upfront, they are often using your funds to finish a previous client's job, cover business debts, or keep a struggling operation afloat. If that builder then becomes insolvent, you lose both your money and your renovation. State deposit caps exist specifically to limit your financial exposure in this scenario.
The legal limits by state
| State | Legislation | Contract value | Max deposit |
|---|---|---|---|
| VIC | Domestic Building Contracts Act 1995 | Under $20,000 | 10% |
| $20,000 or more | 5% | ||
| NSW | Home Building Act 1989, s.8 | Any value | 10% |
| QLD | QBCC Act 1991, Schedule 1B | Under $20,000 | 10% |
| $20,000 or more | 5% | ||
| WA | Home Building Contracts Act 1991, s.10 | $7,500–$500,000 | 6.5% |
| SA/TAS/NT/ACT | Various | Varies | Verify locally |
On a $100,000 renovation: VIC max is $5,000 · NSW max is $10,000 · QLD max is $5,000 · WA max is $6,500. A builder asking for $50,000 upfront is demanding 5–10× the legal maximum.
What happens if you pay an illegal deposit
Paying more than the legal limit can undermine your insurance protection. In Victoria, DBI is designed around the assumption that you paid the legal deposit amount. If you paid 50% upfront and the builder disappears, the excess above the cap may not be recoverable through the DBI claim process. The same principle applies in WA (Home Indemnity Insurance) and Queensland (QBCC Home Warranty Scheme).
What to watch for
Pre-construction fees that push the total above the cap
If your contract is $80,000 and the builder asks for a $4,000 deposit plus a $3,000 "project commencement fee," the combined $7,000 exceeds the Victorian 5% cap of $4,000 — and may breach the Act regardless of labelling.
Payment schedules not tied to work stages
If the contract says "50% on signing, 50% on completion" rather than tying payments to construction stages, ask for a stage-based schedule before signing.
What to do if you've been asked for too much
- Calculate the deposit as a percentage of the total contract price and compare against the cap for your state.
- Ask the builder to explain any upfront fees that sit outside the deposit line item — their combined total must not exceed the cap.
- Check insurance is in place before paying anything.
- If the deposit exceeds the legal cap, do not pay. Ask the builder to revise. If they refuse, that tells you something important about how they run their business.
This article is for general information only and does not constitute legal or financial advice. Sources: Domestic Building Contracts Act 1995 (Vic) · Home Building Act 1989 (NSW) · QBCC Act 1991 (QLD) · Home Building Contracts Act 1991 (WA)