CPI measures the average price change of a basket of goods and services — but inflation affects different people very differently depending on what they spend money on. This guide explains how to think about inflation, what it does to savings and debt, and what Australian data shows.
The Consumer Price Index (CPI) tracks the average price change of a fixed basket of goods and services that a typical Australian household purchases — including food, housing, transport, healthcare, education, and recreation. It is produced quarterly by the Australian Bureau of Statistics (ABS) and is the primary measure of inflation used by the RBA and the government.
The critical limitation: CPI measures average price changes for an average household. Your personal inflation rate may be very different depending on what proportion of your income goes to housing costs, whether you own or rent, whether you have children in private schools, and your transport habits. Renters experienced significantly higher effective inflation than homeowners in 2022-2024 due to rental price surges that exceeded the CPI average.
Headline CPI inflation reached a peak of approximately 8.4% in December 2022 — a 30-year high driven by global supply chain disruptions, energy price spikes, and domestic demand pressures post-COVID. By the March 2026 quarter, headline inflation had moderated to approximately 3.2% annually — still at the upper end of the RBA's 2-3% target band, which is why the RBA raised rates three times in early 2026 after the 2025 cuts.
| Category | Approximate Annual Change (2025-26) |
|---|---|
| Housing (rents, new dwelling costs) | +6-8% |
| Insurance and financial services | +7-10% |
| Food and non-alcoholic beverages | +3-4% |
| Health | +4-5% |
| Transport | +1-2% |
| Clothing and footwear | −1 to +1% |
Model real returns by entering an assumed inflation rate alongside your investment return.
Open Compound Interest Calculator →Inflation erodes the real purchasing power of savings held in low-interest accounts. The real return on savings is the nominal rate minus the inflation rate:
| Savings Scenario | Nominal Return | Inflation | Real Return |
|---|---|---|---|
| Transaction account | 0.5% | 3.2% | −2.7% (losing purchasing power) |
| Standard savings account | 2.5% | 3.2% | −0.7% |
| High-interest savings (2026) | 5.2% | 3.2% | +2.0% (beating inflation) |
| Share market (long-run avg) | 9% | 3.2% | +5.8% (strong real return) |
The current environment (June 2026) of 5%+ savings account rates is unusual by Australian historical standards — for most of the 2010s, savings rates were 0.5-2%, meaning inflation consistently eroded purchasing power for cash savers. The current rates offer genuine real returns for cash savers for the first time in over a decade.
Inflation has a complex and somewhat counterintuitive relationship with debt. In the short run, the RBA raises interest rates to combat inflation — increasing variable rate mortgage and credit card repayments. This is the direct, painful impact many Australians experienced in 2022-2026.
Over the longer run, moderate inflation reduces the real burden of fixed-amount debt. A $500,000 mortgage taken out in 2020 represents the same nominal debt but a smaller real burden as wages and prices have risen since then. The bank still gets paid in nominal dollars, but those dollars buy less than they did at origination — effectively benefiting the borrower in real terms over time.
The Consumer Price Index tracks a basket of goods and services weighted to reflect the spending of an average Australian household. You are not an average household, and nobody is.
If you rent in a capital city, housing is a far larger share of your spending than the basket assumes, and rent inflation dominates your experience. If you own your home outright, it barely touches you. A household with two children in childcare, a long car commute, and private health insurance faces a completely different weighted basket from a retired couple who own their home and rarely drive.
This is why the published figure so often feels wrong. It is not wrong — it is an average of a distribution you sit somewhere within, and the spread across that distribution is wide.
The index also makes adjustments that are technically defensible and intuitively uncomfortable. When beef becomes expensive, households buy chicken; statistical agencies account for this substitution. When a laptop costs the same but is twice as fast, part of that is treated as a quality improvement rather than a price hold. Both adjustments are reasonable. Both mean the index measures something subtly different from the cash leaving your account.
Real return ≈ Nominal return − Inflation rate
A savings account paying 4% while inflation runs at 3% is not paying you 4%. It is increasing your purchasing power by roughly 1%, and it is doing so before tax.
Tax makes this worse than it looks, because tax is levied on the nominal interest. On that 4% return, tax is paid on the full 4%, not on the 1% of real gain. For someone on a higher marginal rate, an account paying 4% during 3% inflation can deliver a negative real return after tax — the balance rises, and it buys less each year.
This is not an argument for any particular investment. It is an argument for measuring in real terms rather than nominal ones, because nominal growth is frequently an illusion.
Inflation erodes the real value of a fixed nominal debt. A $500,000 mortgage does not grow with prices; your income, over time, generally does. This is why sustained inflation has historically favoured borrowers with long-dated fixed-rate debt and disadvantaged savers holding cash.
The complication in Australia is that most mortgage debt is variable rate. When inflation rises, the Reserve Bank commonly responds by raising the cash rate, and variable mortgage rates follow. The erosion of the debt's real value is then offset — sometimes more than offset — by a higher repayment. Whether you benefit depends heavily on whether your rate is fixed and for how long.
Inflation reduces what your money buys, and it does so unevenly. The published CPI is an average across a basket that probably does not resemble yours, adjusted for substitution and quality in ways that are defensible but not intuitive.
Measure returns in real, after-tax terms. Recognise that fixed nominal debt erodes in real value while variable-rate debt may not. And treat any long-range projection expressed in nominal dollars with suspicion.
This page provides general information only and is not financial advice. Inflation and interest rate conditions change; check current figures with the Australian Bureau of Statistics and the Reserve Bank of Australia, and speak with a licensed financial adviser about your own position.
What is the current inflation rate in Australia?
Australian headline CPI inflation for the March 2026 quarter was approximately 3.2% annually. The RBA targets inflation of 2-3% — the current rate remains at the upper end of this band, which is why the RBA raised the cash rate three times in early 2026 after cuts in 2025.
How does inflation affect my savings?
Inflation erodes the purchasing power of money held in low-interest accounts. If your savings earn 2% p.a. but inflation is 3.2%, your real return is approximately −1.2% — your balance grows in dollar terms but buys less over time. High-interest savings accounts at 5%+ currently offer a positive real return above inflation.
How does inflation affect debt?
Inflation benefits borrowers in real terms: the real value of fixed debt decreases as prices rise. A $300,000 mortgage taken out when average wages were $80,000 represents a smaller real burden when wages rise to $90,000. However, variable rate debt (mortgages, credit cards) may also see higher nominal interest rates when the RBA raises rates to combat inflation.
What is the RBA inflation target?
The Reserve Bank of Australia targets consumer price inflation (CPI) of 2-3% on average over the economic cycle. This band is considered consistent with price stability while supporting employment. When inflation persistently exceeds this range, the RBA raises the cash rate to slow spending and price growth.
Illustrative only. Simple interest earns on the principal alone; compound interest earns on the accumulated balance, so the two diverge increasingly over time.