Rent Increase Calculator

How Rent Increases Work in Australia

Every Australian state allows landlords to increase rent on a rental property — but the rules around when, how often, and what paperwork is required differ depending on where your property is located.

The good news is that all states have converged on a few core principles. As of 2024–2025, every state now requires a minimum 12-month gap between rent increases, written notice well in advance, and gives tenants the right to challenge increases they consider excessive.

No Australian state or territory caps the dollar amount or percentage of a rent increase. You can increase by $10 or $100 — the law doesn't limit the figure. What it does limit is the process: give the correct notice, use the right form, don't increase more often than allowed, and be prepared to justify the amount if your tenant challenges it.

Getting any of these wrong can make your rent increase invalid and unenforceable. The tenant can simply continue paying the current amount, and you'll need to start the process again — costing you months of the increase you were counting on.

State-by-State Rent Increase Rules

The detail matters. Here's exactly what applies in each state.

Western Australia

WA's rent increase rules were significantly reformed under the Residential Tenancies Amendment Act 2024. The most important change: the minimum gap between increases was doubled from 6 months to 12 months.

• Notice period: 60 days written notice before the increase takes effect.
• Frequency: Once every 12 months (changed from 6 months under the 2024 amendments).
• Prescribed form: Must use Form 10 (Notice of Rent Increase). Verbal notice, emails, or informal text messages do not meet legislative requirements.
• Cap on amount: No cap, but the increase must not be harsh or unconscionable.
• Tenant rights: Can apply to the Magistrates Court to dispute an excessive increase.
• Key change: Under the current rules, increases apply from the effective date stated in the notice — there is no grace period.

For a detailed walkthrough of the WA process, see our WA Rent Increase Guide.

New South Wales

NSW made a major change on 31 October 2024 under the Residential Tenancies Amendment Act 2024: the 12-month frequency limit now applies to almost all tenancies, including fixed-term leases — a significant shift from the previous rules.

• Notice period: 60 days written notice. If posting, allow an extra 7 working days for delivery.
• Frequency: Once every 12 months for both fixed-term and periodic tenancies (since 31 October 2024).
• Prescribed form: No prescribed form required. You can use the NSW Fair Trading Notice of Rent Increase form, your own written notice, or even email — as long as it's in writing and includes the new amount and effective date.
• Cap on amount: No cap, but the increase must not be "excessive" relative to market rent for comparable properties.
• Tenant rights: Can apply to NCAT within 30 days of receiving the notice. NCAT considers comparable rents, property condition, and amenities — not the tenant's income or ability to pay.
• Key change: Previously, fixed-term leases under 2 years could have increases written into the agreement at any interval. The 12-month cap now applies to almost all leases, and renewing or switching from fixed-term to periodic does not reset the clock.

Queensland

Queensland introduced a unique rule in June 2024: the 12-month frequency limit now applies to the property, not the tenancy. This is the only state where a change of tenant doesn't reset the rent increase clock.

• Notice period: 2 calendar months written notice.
• Frequency: Once every 12 months, and this is tied to the property — not the tenancy. If the previous tenant's rent was increased 8 months ago, the new tenant's rent cannot be increased until 12 months from that date.
• Prescribed form: No specific prescribed form, but the notice must be in writing.
• Cap on amount: No cap, but tenants can dispute "excessive" increases via the RTA or QCAT.
• Key changes: The frequency limit shifted from per-tenancy to per-property on 6 June 2024. Rent bidding is banned. The tenancy agreement must now include the date of the last rent increase for the property.
• Compliance risk: Failing to include the date of the last rent increase in a new tenancy agreement carries a significant financial penalty.

Victoria

Victoria increased the minimum notice period for rent increases to 90 days on 25 November 2025 — the longest notice period of any Australian state.

• Notice period: 90 days written notice (increased from 60 days on 25 November 2025).
• Frequency: Once every 12 months.
• Prescribed form: Must use the Consumer Affairs Victoria "Notice of proposed rent increase" form. Text messages, emails without the form, or verbal notice are not valid.
• Cap on amount: No cap, but the increase must not be "excessive" compared to comparable properties in the area.
• Tenant rights: Can request a free rent assessment from Consumer Affairs Victoria within 30 days of receiving the notice. If unresolved, can escalate via Rental Dispute Resolution Victoria (RDRV) or VCAT.
• Fixed-term leases: Rent cannot be increased during a fixed-term lease unless the lease specifically includes a rent increase clause.
• Other recent changes: No-fault evictions have been removed and rental bidding is banned.

How to Determine a Fair Rent Increase

No state caps the amount you can increase rent by, but every state allows tenants to challenge "excessive" increases. The question is: what's a defensible increase?

Start with comparable properties. Search realestate.com.au and Domain for properties similar to yours — same suburb, same number of bedrooms, similar condition. What are they listed at? That's your benchmark. If comparable properties are renting for $600/week and you're at $550, a $50 increase is well within market expectations. A $100 increase might be harder to justify.

Consider CPI as a baseline. Many landlords use the Consumer Price Index (CPI) as a starting point. It's not a legal requirement in any state, but it provides a defensible anchor. If CPI is running at 3–4%, a 3–4% increase is unlikely to be challenged successfully.

Factor in your costs. Council rates, insurance, strata levies, and maintenance costs tend to rise annually. If your costs have increased, that supports a proportional rent increase — and it's useful evidence if a tenant challenges the amount.

Value your tenant. A reliable, long-term tenant who pays on time and looks after the property is worth real money. The cost of vacancy — advertising, cleaning, potential minor repairs, and lost rent while the property sits empty — can easily exceed $2,000 to $4,000. A slightly below-market rent increase that keeps a great tenant is often the better financial decision.

Check vacancy rates. In a tight rental market with low vacancy, tenants have fewer alternatives and market rent may well exceed your current rent. In a softening market, pushing for a large increase risks the tenant leaving and the property sitting vacant at a lower rent than you had before.

If you're not sure where your rent sits relative to the market, use our Property Management Fees Calculator to understand how much a property manager would charge to handle this for you — and whether the savings from self-managing justify doing your own market research.

Common Mistakes Landlords Make With Rent Increases

Rent increases are one of the areas where self-managing landlords most commonly trip up. Here are the mistakes to avoid.

Not giving enough notice

Every state requires written notice well in advance. Victoria now requires 90 days — three full months. If you give 59 days' notice in a state that requires 60, the increase is invalid and the tenant can simply continue paying the current rent. Count carefully, and remember to allow extra days if you're posting the notice.

Increasing too frequently

All states now cap increases at once per 12 months. In Queensland, the 12-month clock follows the property, not the tenant — so if you've just placed a new tenant and increased the rent at the start of the lease, you need to know when the previous increase took effect to avoid breaching the frequency rule.

Using the wrong form

WA and Victoria both require specific prescribed forms. In WA, you must use Form 10. In Victoria, you must use the Consumer Affairs Victoria "Notice of proposed rent increase" form. An informal email or letter — even if it contains all the right information — does not satisfy the legal requirement in these states.

Not keeping records

Document when the last increase took effect and keep a copy of every notice you've served. Queensland now requires the date of the last rent increase to be stated in the tenancy agreement itself. Without records, you risk increasing too frequently or being unable to prove compliance if a dispute arises.

Assuming lease renewal resets the clock

Many landlords assume they can set a new rent when renewing a fixed-term lease without following the standard notice process. They can't. The notice period requirements still apply — and in NSW, renewing a lease or switching from fixed to periodic doesn't reset the 12-month clock at all.

Not being able to justify the amount

While no state caps the amount, every state allows tenants to challenge "excessive" increases. If you can't demonstrate that the increase aligns with comparable market rents for similar properties in your area, you risk having it reduced or overturned at tribunal. Do your research before issuing the notice.

How to Serve a Valid Rent Increase Notice

Here's the step-by-step process to get it right, regardless of which state your property is in.

1. Check when the last increase took effect. Confirm it has been at least 12 months. In Queensland, check the date for the property, not just your current tenancy.
2. Research market rent. Search comparable listings in your suburb. Note the asking rents for properties similar to yours — this is your evidence if challenged.
3. Decide on the increase amount. Use the calculator above to see the new rent in weekly and annual terms, and the percentage equivalent.
4. Complete the correct form. Form 10 in WA, the Consumer Affairs Victoria prescribed form in VIC, or a written notice in NSW and QLD. The notice must include the new rent amount and the date it takes effect.
5. Serve the notice with the required lead time. 60 days in WA and NSW; 2 calendar months in QLD; 90 days in Victoria. Count from the date the tenant receives the notice, not the date you send it.
6. Allow extra time if posting. 7 working days in NSW, 5 business days in Victoria. In WA and QLD, consider using hand delivery or email with read confirmation to avoid disputes about service dates.
7. Keep a copy and record the date. Store the served notice and note the date of service. You'll need this record for the next increase and for compliance if a dispute arises.

Platforms like Landlord Wise auto-generate the correct prescribed form for your state, track when your next increase is due, and maintain a compliance record — removing the risk of getting the paperwork wrong.

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Frequently Asked Questions

How much can I increase rent in Australia?

There is no cap on rent increases in any Australian state or territory. You can increase rent by any amount, but the increase must not be "excessive" compared to market rent for comparable properties. Tenants in all states have the right to challenge an increase they believe is excessive through their state's tribunal or dispute resolution body.

How much notice do I need to give for a rent increase?

Notice periods vary by state. Western Australia and New South Wales require 60 days written notice. Queensland requires 2 calendar months written notice. Victoria requires 90 days written notice (increased from 60 days in November 2025). If sending notice by post, additional days must be allowed for delivery.

How often can I increase rent?

All Australian states now limit rent increases to once every 12 months. In Queensland, the 12-month limit applies to the property rather than the tenancy, meaning a new tenant cannot have their rent increased if the previous tenant's increase was less than 12 months ago.

Do I need a special form to increase rent?

It depends on your state. Western Australia requires the prescribed Form 10. Victoria requires the Consumer Affairs Victoria "Notice of proposed rent increase" form. New South Wales and Queensland do not mandate a specific form, but the notice must be in writing and include the new rent amount and the date it takes effect.

Can I increase rent when renewing a lease?

Yes, but the standard rules still apply. You must give the correct notice period, and it must have been at least 12 months since the last increase. In New South Wales, renewing a lease or switching from fixed-term to periodic does not reset the 12-month clock. In Victoria, rent cannot be increased during a fixed-term lease unless the lease includes a specific rent increase clause.

What happens if I don't follow the correct process?

If you fail to give enough notice, use the wrong form, or increase rent too frequently, the increase is invalid and the tenant is not required to pay it. They can continue paying the current rent amount. You would need to start the process again with a valid notice, which delays your increase by months.

Can a tenant refuse a rent increase?

A tenant cannot simply refuse a valid rent increase. However, they can challenge it if they believe the increase is excessive. In NSW, they can apply to NCAT within 30 days. In Victoria, they can request a free rent assessment from Consumer Affairs Victoria. In Queensland, they can apply to the RTA for dispute resolution or escalate to QCAT. In all states, the tenant must continue paying the current rent while a dispute is being resolved.

Is CPI a good benchmark for rent increases?

CPI (Consumer Price Index) is a commonly used benchmark but it is not a legal requirement in any Australian state. Market rent for comparable properties in your area is a more relevant measure. In a strong rental market, market rent may increase well above CPI. In a softer market, even a CPI-level increase may be above what the market supports. Research comparable listings before deciding on your increase.