CPI Rent Review Calculator
Your exact rent increase, in seconds.
Run a commercial lease CPI rent review on real ABS index numbers. Pick your series, set your review period, apply any cap or floor, and read the dollar and percentage breakdown.
Real ABS data. Sydney and Australia All Groups CPI, Q1 2020 to Q1 2026, sourced from Cat 6401.0.
Cap and floor controls. Clamp the result to your lease wording in one tick.
Full breakdown. New rent, dollar increase, percentage, weekly and monthly.
How a CPI review works
Index in, rent out.
A CPI rent review adjusts your commercial lease rent by inflation, not negotiation. The landlord compares the ABS index at two lease-specified dates and applies the change. Get the series or the quarters wrong and the review is invalid.
Pick the right series
Sydney All Groups and Australia All Groups each produce a different number. Using the wrong ABS series is the most common error landlords make. Your lease names the one that applies.
Match the quarters
CPI is published quarterly. The from and to dates in the calculation must match the dates in your lease review clause. The tool maps your month to the right ABS quarter.
Apply caps and collars
Most leases include a cap (maximum increase) or floor (minimum increase). These must be applied correctly or the review will not hold. Tick the box and the calculator clamps the result.
The calculator
Your exact CPI rent increase.
Enter your current rent and lease dates. The calculator uses ABS-published CPI index numbers to compute the exact adjustment, with optional cap and floor controls.
Select the "from" and "to" dates as defined in your lease review clause.
From date
To date
This calculator provides an estimate based on ABS CPI data. Always review your lease agreement and consult a licensed property professional before issuing a rent review notice.
New annual rent
…
per annum (ex. GST)
Applied CPI increase
…
applied to rent
Current rent
…
per annum
Dollar increase
…
per annum
New weekly
…
per week
New monthly
…
per month
Review period
…
from → to
CPI series
…
ABS Cat 6401.0
This calculation is indicative only. Always verify the CPI index dates against the specific wording in your lease. Blox Commercial accepts no liability for reliance on this tool without professional confirmation.
What landlords need to check
- Check your lease clause first. CPI, fixed percentage, and market review each have different rules and notice requirements.
- Know your cap and floor. Many commercial leases cap annual CPI increases at 4 or 5 percent. The calculator above handles caps if you tick the box.
- Serve written notice in the right window. Most leases require 30 to 60 days written notice before the review date. Miss it and you lose this cycle's increase.
- Confirm the ABS index your lease specifies. Sydney All Groups, Australia All Groups, and Capital City Weighted Average each produce different numbers. The wrong series invalidates the review.
- Retail leases follow the Retail Leases Act 1994 NSW. Section 18 restricts the frequency and structure of retail rent reviews. Commercial (office, industrial) leases are not bound by the Act.
What tenants need to check
- Verify the index your lease specifies. Sydney vs Australia vs All Groups Weighted can each return a different figure.
- Check the quarters exactly. CPI is published quarterly. The from and to quarters in the landlord's calculation must match the dates in your lease.
- Know whether a cap protects you. Many leases cap increases at 4 or 5 percent. If the landlord's notice exceeds the cap, push back in writing.
- Request the source ABS publication. You're entitled to see the data your landlord is relying on (ABS Cat 6401.0).
- Retail tenants have extra protections. The Retail Leases Act 1994 NSW limits market reviews and outgoings recovery.
- Don't accept a verbal result. Everything goes in writing, including the calculation breakdown and the index numbers used.
Want us to verify this review for you?
Send your results to Blox and we will confirm the calculation against your lease and handle the formal notice.
Data transparency
The CPI data this tool runs on.
The calculator uses ABS-published quarterly index numbers. Last 12 quarters shown below, updated when the ABS releases new data.
| Quarter | Period | Sydney index | Australia index |
|---|
Questions, answered
CPI rent review FAQ.
The questions commercial landlords and tenants ask most when a CPI review comes due.
What is a CPI rent review?
How do I calculate a CPI rent increase for a commercial lease?
How do I calculate a CPI rent increase for a commercial lease in NSW?
Which CPI index applies to a NSW commercial lease?
Can a commercial landlord increase rent by more than CPI?
Let's talk
A managed review beats a missed one.
Every rent review, every increase, calendared and served on time. Tell us about your lease and Blox will run the next review for you.
(02) 8883 4559Blox Commercial Real Estate Pty Ltd. ABN 20 633 280 109. NSW Licence 1013554.