Annual rent increases by state: how often you can raise, how much notice, and how to give it

What every state has in common

All eight Australian residential tenancy regimes share three structural rules on rent increases:

1. Frequency limit — you can only increase rent at most once per X months. 2. Minimum notice period — you must give the tenant at least Y days/months notice in writing before the new rent applies. 3. Form of notice — must be in writing, signed (or electronically equivalent), and state the new rent + the date it applies from.

What differs between states is the specific X, the specific Y, and the level of additional protection (e.g. cost-of-living caps in some states, market-rent dispute paths).

Quick-reference table

| State | Minimum notice | Min interval between increases | Form | |---|---|---|---| | QLD | 2 months | 12 months | RTA Form 18 (or written notice meeting s 91) | | NSW | 60 days | 12 months | NSW Fair Trading rent-increase letter | | VIC | 60 days | 12 months | Notice of rent increase (Consumer Affairs Vic form) | | WA | 60 days | 6 months (fixed-term) / 30 days (periodic) | Written notice | | SA | 60 days | 12 months | Written notice | | TAS | 60 days | 12 months | Written notice (Form 6) | | ACT | 8 weeks | 12 months (with CPI cap formula) | Written notice | | NT | 30 days | 6 months | Written notice |

Always cross-check with the current state regulator before serving a notice — these rules change.

QLD: 2 months notice, 12 months minimum interval

The Residential Tenancies and Rooming Accommodation Act 2008 (Qld) was amended in 2022 to set a 12-month minimum interval between increases for the same tenancy. So even if a new tenant takes over a periodic agreement, the 12-month clock keeps running from the previous lawful increase.

The notice (RTA Form 18 or any written equivalent meeting s 91) must:

• Be in writing.
• State the new rent amount.
• State the day from which the new rent is payable (at least 2 months from when the notice is taken to be received — add 7 days if posted).
• Be signed.

If the increase is "excessive" relative to market rent, the tenant can apply to QCAT to challenge it (s 92). QCAT considers comparable rents in the area and the time since the last increase.

NSW: 60 days notice, 12 months minimum interval

NSW Fair Trading enforces the Residential Tenancies Act 2010 (NSW). Rent can only be increased once every 12 months for ongoing periodic agreements (the 12-month rule started 11 June 2023).

In a fixed-term agreement, the rent can only be increased if the agreement specifies the new amount or the calculation method. Many fixed-term agreements have a clause like "rent will be reviewed annually and may increase by the lesser of 5% or CPI" — that's enforceable.

The notice must be in writing and given at least 60 days before the new rent applies.

VIC: 60 days notice, 12 months minimum interval

The Residential Tenancies Act 1997 (Vic) was overhauled in 2021. Rent can only be increased once every 12 months (from the most recent increase or the start of the agreement, whichever is later).

Notice must be on the prescribed Consumer Affairs Victoria form, and must give 60 days. If the tenant believes the new rent is excessive, they can apply to VCAT.

WA: 60 days notice, 6/30 days interval

WA is unusual: the minimum interval depends on whether the tenancy is fixed-term (6 months) or periodic (30 days for rent-review purposes — though a periodic tenant can still terminate with 30 days notice if they don't want to pay).

In practice, most WA landlords stick to once-a-year increases on fixed-term renewal.

SA, TAS, ACT, NT

The pattern is consistent: 60-day minimum notice in writing, mostly 12-month minimum intervals, the ACT has an additional CPI-based cap formula (rent can increase by up to a published % index unless the tribunal approves more), the NT has a shorter 6-month minimum interval.

How to actually give the notice

Three things make a notice valid in any state:

1. In writing — email is generally fine (most states have moved toward "writing includes electronic communication" definitions), but registered post or in-person delivery is the safer evidence trail. 2. Specific — exact new rent, exact effective date, signed (or electronically signed). 3. Calculated correctly — the effective date must be at or after the deemed receipt date plus the minimum notice period.

A common landlord mistake: counting from the day they signed the notice, not the day it's deemed received. If you mail a 60-day notice on 1 March, it's deemed received roughly 8 March (postal allowance varies by state), so the earliest the new rent applies is around 7 May — 60 days after deemed receipt.

Practical advice

• Don't surprise the tenant. A two-line message a few weeks before the formal notice ("FYI, rent review coming up — I'm planning a small increase to align with market") gives the tenant a chance to plan. Surprises are the #1 reason rent reviews escalate to disputes.
• Justify with comparables. Even if the law doesn't require it, attaching 2–3 comparable rent listings in the same suburb makes the increase land better.
• Be reasonable. A 50% jump invites a tribunal challenge. Most landlords go for CPI + 1–3% if the rental market supports it.
• If the tenant is good, consider matching CPI only. Tenant turnover costs you 2–4 weeks of vacancy, professional cleaning, often re-letting fees, and the carpet cleaner. A modest increase that keeps a good tenant is usually the better economic outcome.

What this means for you

Property Journal's rent-review wizard (rolling out across all states) walks you through the right notice period, the right interval check, and generates a state-correct Notice of Rent Increase from your tenancy data. Combined with the AI assistant for "is this increase excessive", you have most of what you need to do this confidently.

> Not legal advice. State-specific rules change; cross-check with the relevant regulator before serving a notice.