A rent increase letter lands, and the first question is always the same: can they actually do this? In South Australia, the answer depends on your lease type, how much notice you've been given, and how recently your rent last went up. Most tenants don't realise how much protection they already have.
- Your landlord must give you at least 60 days' written notice before a rent increase takes effect.
- Rent can only be increased once every 12 months — from your last increase, or from when your lease started.
- On a fixed-term lease, rent can only go up if your lease agreement actually includes a clause allowing it.
- There's no legal cap on how much rent can rise by — but you can ask SACAT to review an increase you believe is excessive.
The two rules every increase has to meet
Regardless of what type of lease you're on, a valid rent increase in South Australia has to clear two separate bars. Miss either one, and the increase isn't enforceable yet.
60 days' written notice
- Must be in writing — a text message or verbal mention doesn't count
- Must state the new rent amount and the date it starts
- The 60 days runs from when you receive the notice, not when it's dated
- Exception: if your lease already sets out the exact future amount and date, separate 60-day notice isn't required
Once every 12 months
- Counted from your last increase, or from when your lease began
- Applies even if your lease has changed from fixed-term to periodic
- A second increase inside that window isn't valid, regardless of notice given
Fixed-term leases have an extra condition Easy to miss
This is the detail that catches people out. If you're on a fixed-term lease, your rent can only be increased if your lease agreement includes a clause that specifically allows it — usually setting out the amount, or how it will be calculated. No such clause means no increase during that fixed term, no matter how much notice you're given. If your lease already spells out the exact future amount and start date — a stepped-rent clause like "$450/week from 1 July" — that clause itself satisfies the notice requirement, and your landlord doesn't need to send a fresh 60-day notice when the date arrives.
Before responding to any increase notice on a fixed-term lease, check your original agreement for a rent review clause. If there isn't one, the increase generally can't take effect until your lease moves to a periodic (rolling) arrangement.
One trap worth knowing about if you're renewing: signing a new fixed-term lease with the same landlord for the same property doesn't reset the 12-month clock. The minimum interval is still measured from your last actual increase, not from the date of your new agreement.
Is there a limit on how much rent can go up?
Not a hard one. There's no legislated cap on the size of a rent increase in South Australia — a landlord can technically ask for any amount, provided the notice and timing rules are met. What you do have is the right to challenge an increase you think is excessive.
Applying to SACAT over an excessive increase
You can apply to the South Australian Civil and Administrative Tribunal (SACAT) to have a rent increase reviewed within 90 days of receiving the notice. SACAT will weigh up rent for comparable properties nearby, the condition and repair state of your home, and whether the size of the increase is disproportionate to your previous rent.
This is a review, not a guarantee — SACAT can uphold, reduce, or occasionally increase the amount depending on what the evidence shows. Gathering a few comparable rental listings nearby strengthens your case considerably.
What to do when a notice arrives
Check the notice period
Confirm you've been given at least 60 days from the date you actually received it — not the date printed on the letter, if the two differ.
Check the timing against your last increase
Work out exactly 12 months from your last increase (or lease start date). If the new increase starts before that date, it isn't valid yet.
Check your lease type
On a fixed-term lease, confirm there's a rent review clause. On a periodic lease, this condition doesn't apply — only the notice and 12-month rules do.
Decide if the amount feels fair
Look up two or three comparable rentals nearby. If the increase looks well out of step with the local market, that's your basis for a SACAT review.
If the increase doesn't meet the rules
If the notice period is short, or it falls inside the 12-month window, or your fixed-term lease has no rent review clause, the increase isn't legally effective — you can keep paying your current rent and put your landlord on notice in writing that the increase doesn't comply.
State plainly which requirement hasn't been met — the notice period, the 12-month rule, or the missing lease clause — and that you'll continue paying your current rent until a valid notice is issued. Keep a copy, and keep paying on time; withholding rent entirely can create problems of its own.
If a rent increase is being used as pressure or intimidation — or you're dealing with an unsafe living situation involving a partner — that's a different pathway. Contact the Domestic Violence Crisis Line on 1800 800 098 (24/7, free) before responding to your landlord.
The bottom line: a rent increase in South Australia has to clear two clear tests — 60 days' notice, and at least 12 months since the last one — plus a third if you're on a fixed-term lease. If any of those haven't been met, you're not obligated to pay the new amount yet, and if the figure itself seems out of step with the market, SACAT review is a genuine option within 90 days.
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