Retail Price Index (RPI) in Australia: 2026 Guide

The RPI is a measure of how the prices of a representative basket of retail goods and services change over time. It is designed to reflect the cost of living for households by tracking everyday expenses, including groceries, fuel, rent, transport, and utility bills. While the CPI is the primary inflation measure in Australia, the RPI is still referenced in some contracts, wage agreements, and pension calculations.

Key Features of the RPI

• Basket of Goods: The RPI tracks a sample of goods and services that represent typical household spending. This basket is updated periodically to reflect changing consumer habits and priorities.

• Regular Updates: The index is published at regular intervals, often monthly or quarterly, providing a snapshot of price movements across the economy.

• Methodological Differences: The RPI and CPI are calculated differently. For example, the RPI includes mortgage interest payments, whereas the CPI does not. This means the two indexes can diverge, especially when interest rates change.

Although the CPI is the official inflation gauge in Australia, the RPI still plays a role in specific areas. In 2026, several developments are shaping how these indexes are used:

• Wage Agreements: Some employment contracts and state awards continue to reference the RPI for annual pay adjustments. This can affect the take-home pay of workers whose agreements are linked to the index.

• Pensions and Superannuation: Certain legacy superannuation funds and defined-benefit pensions use the RPI to determine annual increases. While newer arrangements are moving towards CPI-based adjustments, many existing agreements still rely on the RPI.

• Rental Agreements: Some older leases and private rental contracts reference the RPI for annual rent reviews. However, recent tenancy reforms are encouraging the use of the CPI for greater transparency and consistency. If you’re unsure which index applies to your lease, it’s important to check your contract or seek advice. For more on home-related financial considerations, see home insurance.

• Policy Shifts: The Australian Bureau of Statistics (ABS) continues to refine how inflation is measured. In 2026, more detailed inflation data is being published, allowing consumers and businesses to track specific cost-of-living pressures. This has prompted some sectors to reconsider their reliance on the RPI, but it remains relevant in certain contexts.

Even if you don’t see the term “RPI” on your payslip or rental agreement, it can still have an impact on your financial situation. Here’s how:

Wage Growth

If your employment contract is linked to the RPI, your annual pay increase will reflect changes in the index. In periods when inflation is moderating, RPI-linked wage increases may be smaller than those tied to the CPI, depending on how each index moves.

Rent and Bills

Some rental agreements, particularly older ones, use the RPI to calculate annual rent increases. With a shift towards CPI-based calculations in newer contracts, it’s important to know which index applies to your situation. This can make a difference in how much your rent rises each year.

Long-Term Planning

For retirees with defined-benefit superannuation or pensions linked to the RPI, annual increases in payments are determined by the index’s movement. While there are recommendations to phase out RPI references in favour of the CPI for newer funds, many legacy arrangements remain in place.

Example: How RPI Can Affect Rent

Suppose your rental agreement states that your rent will increase each year by the RPI. If the RPI for the year is 3%, a weekly rent of $500 would rise to $515. This adjustment helps landlords and tenants keep pace with changes in the cost of living, but the exact impact depends on how the RPI compares to the CPI and other measures.

As Australia’s economy evolves, the use of the RPI is gradually declining in favour of the CPI. However, the RPI remains important for those with longstanding contracts, legacy pensions, or specific wage agreements. In 2026, several trends are worth noting:

Policy Harmonisation

There is a continued push for more sectors to adopt the CPI as the standard reference for inflation adjustments. This is intended to create greater consistency and transparency across contracts and agreements.

Consumer Awareness

Understanding which index applies to your finances—whether it’s RPI or CPI—can help you budget more effectively and negotiate better terms. If you’re affected by an RPI-linked agreement, it may be worth reviewing your contract and considering whether a shift to CPI would be more beneficial.

Legacy Contracts

Many older agreements still reference the RPI. If you’re unsure about the terms of your contract, or if you’re entering into a new agreement, it’s a good idea to clarify which index will be used for future adjustments.

• Review Your Contracts: Check your employment, rental, or pension agreements to see if they reference the RPI. Understanding the terms can help you anticipate changes in your income or expenses.

• Seek Advice: If you’re unsure about how the RPI affects your finances, consider seeking advice from a financial adviser or relevant authority.

• Stay Informed: Keep an eye on updates from the ABS and government policy changes that may affect how inflation is measured and applied to contracts.

While the Retail Price Index is becoming less prominent in Australia’s financial landscape, it still matters for many people in 2026. Whether you’re negotiating a wage increase, reviewing your rental agreement, or planning for retirement, knowing how the RPI works—and how it differs from the CPI—can help you make more informed decisions. As the shift towards CPI continues, staying aware of which index applies to your situation remains important for managing your finances effectively.