Deposit Limits on Residential Building Contracts in the NT

What it is

A deposit on a Northern Territory residential building contract is capped at 5 per cent of the total contracted price. The cap is not guidance. Asking for more is a regulatory offence, and a court that convicts can order the builder to hand the money back.

The rule lives in the Building Regulations 1993 (NT), not in the Building Act 1993 (NT). A builder hunting for the number in the Act will not find it. Regulation 41H(e) makes the deposit a mandatory contract term where a deposit is charged at all. Regulation 41HE(1) turns the cap into an offence.

The exact number and where it sits

Regulation 41H(e) provides that if the contract provides for the payment of a deposit, the contract must specify the deposit payable to the prescribed building contractor, which must be no more than 5 per cent of the total contracted price.

Two things follow that builders routinely miss.

First, the deposit is measured against the total contracted price, which regulation 41H(d) already requires the contract to state. There is no version of a compliant NT residential building contract with a floating price against which a deposit could drift.

Second, a deposit is optional. Regulation 41H(e) only bites if the contract provides for one. Nothing in the Regulations forces a builder to take a deposit at all.

The offence and the penalty

Regulation 41HE(1) is the enforcement limb. A prescribed building contractor who has entered into a residential building contract must not request or receive a deposit from the contracting owner of more than 5 per cent of the total contracted price of the prescribed building work specified in the contract. Maximum penalty is 50 penalty units.

Note the verb "request". The offence is complete when the builder asks. Actually receiving the money is not an element.

Regulation 41HE(3) makes it a regulatory offence and 41HE(4) supplies a reasonable excuse defence. The commercial sting is regulation 41HE(5): a court that finds the contractor guilty may, in addition to imposing a penalty, order the contractor to refund some or all of the deposit to the contracting owner.

Regulation 41HD is a second, separate exposure. Entering into a residential building contract that does not comply with regulation 41H carries a maximum penalty of 100 penalty units. An over-cap deposit written into the contract document can attract both provisions.

The value threshold below which it does not apply

The deposit cap rides on the written contract obligation, so it applies only where a written contract is required.

Section 48B(1) of the Building Act 1993 (NT) prohibits a prescribed building contractor from commencing or continuing prescribed building work without a contract with the owner. Section 48B(3)(a) switches that obligation off where the value of the building work is less than the prescribed amount.

Regulation 41J sets the prescribed amount at $25,000. That figure took effect on 30 March 2026, lifted from $12,000. Below $25,000 there is no statutory contract obligation, so no statutory deposit cap. Several NT Government guidance pages still quote the superseded $12,000 trigger. The Regulations as in force at 30 March 2026 are what govern.

How the NT compares

The 5 per cent cap puts the NT at the tight end of the country.

Jurisdiction	Deposit cap
NT	5 per cent of the total contracted price, no tiers
NSW	10 per cent flat, Home Building Act 1989 s 8
VIC	5 per cent at $20,000 or more, 10 per cent under, DBCA s 11
QLD	10 per cent level 1, 5 per cent level 2, 20 per cent where off-site work exceeds half the price, QBCC Act Sch 1B s 33(1)
WA	6.5 per cent, HBCA s 10(1)(a)(i)
SA	$1,000 where the price is under $20,000, 5 per cent at $20,000 or more, BWC Act s 30(4)(d)
ACT	No statutory cap

The NT is the only jurisdiction running a single flat percentage with no value tier and no off-site work concession. A Darwin builder who imports an eastern-state template and its 10 per cent deposit clause has written an offence into their own paperwork before the job starts.

The practical discipline is simple. Cap the deposit at 5 per cent, state the total contracted price in the same document, and never let a verbal price sit behind the number.