- What is CPI?
- CPI stands for Consumer Price Index, Australia's primary measure of inflation, published quarterly by the Australian Bureau of Statistics (ABS). It tracks price changes across a representative basket of goods and services purchased by Australian households, including housing, food, transport, healthcare, education, and recreation. A 1% rise in CPI means the basket costs 1% more on average. The RBA targets CPI inflation of 2–3% per year. CPI is not a perfect measure of your personal inflation rate - renters face higher housing inflation, heavy drivers face more fuel exposure, and food-heavy budgets are more sensitive to agricultural price swings than the average basket assumes.
- Is inflation always bad?
- No. Moderate inflation of 2–3% per year is generally considered a sign of a healthy economy. It encourages spending and investment (money parked in cash loses real value), reduces the real burden of fixed-rate debt over time (mortgages, HECS), and gives the RBA room to cut interest rates in a downturn. Very low inflation or deflation (falling prices), can be damaging: consumers delay purchases expecting cheaper prices tomorrow, companies cut costs, and unemployment rises. The RBA's 2–3% target is designed to balance these effects. Inflation becomes harmful when it runs well above this range for extended periods, as seen in 2021–2023, because it erodes real incomes, savings, and the ability to plan.
- What inflation rate should I assume for long-term projections?
- For most long-term financial projections, use the RBA's target midpoint of 2.5% per year. For more conservative planning, 3–3.5% reflects Australia's actual average over the past two decades. Avoid using the 2022 peak of 7.8% for anything beyond a 1–2 year timeframe, that spike was driven by pandemic supply shocks and is not a sustainable rate. For retirement planning, which can span 20–30 years, even a 0.5% difference in your assumed inflation rate significantly changes the income you will need. Running the calculator at both 2.5% and 3.5% gives a useful range rather than a false precision point estimate.
- How does inflation affect my retirement planning?
- Inflation is arguably the single most important variable in retirement planning. A retirement income target set in today's dollars will be too low in nominal terms by the time you retire, and will keep shrinking in real terms if drawn at a fixed dollar amount. At 3% inflation: $70,000 per year in today's money becomes roughly $126,000 per year in nominal terms in 20 years. If you draw $70,000 from your super at age 65 with inflation running at 3%, you will have only 74% of that purchasing power at age 75 and 55% at age 85. Use the Retirement Income Calculator to model your drawdown, then use this inflation calculator to convert your income target into the nominal dollars you will actually need each year.
- What is the current inflation rate in Australia?
- Australian CPI inflation was 3.8% in the 12 months to June 2026 (trimmed mean 3.6%), still above the RBA's 2–3% target band though well down from the 7.8% peak in December 2022. The ABS publishes quarterly CPI data, which the RBA uses to guide interest rate decisions. Check the ABS website for the latest figures, since this number moves every quarter. The trimmed mean (which strips out volatile price changes) is a commonly used measure of underlying inflation and typically sits slightly below or above the headline CPI figure.
- What does the RBA's 2–3% inflation target mean for my savings?
- At 2.5% inflation, the midpoint of the RBA target, $100,000 in cash loses around $2,500 in real purchasing power each year. Over 10 years it buys only $78,120 worth of goods in today's money. This is why financial advisers consistently encourage Australians not to hold excessive cash long-term. The target also means that a savings account paying less than 2.5% actually loses real value. HISAs in the 4.5–5.5% range (as seen through 2023–2025) provided a positive real return at prevailing inflation, but HISA rates and inflation both shift with the RBA cash rate.
- How does inflation affect superannuation?
- Your super fund's nominal return needs to exceed inflation to grow your real retirement wealth. Most Australian super funds publish a return target above CPI, for example, 'CPI + 3.5%' or 'CPI + 4%'. A balanced fund returning 7% in a 3% inflation environment is growing your real purchasing power at about 4% p.a. The longer your super compounds above inflation, the more comfortable your retirement. Conversely, if inflation is high and returns are low (a 'stagflationary' environment), super balances can stagnate in real terms. Use the Superannuation Calculator to project your balance in nominal terms, then use this calculator to convert that figure into today's purchasing power.
- Should I worry about inflation if my HISA pays 5%?
- At 3–3.5% inflation, a 5% HISA provides a real return of roughly 1.5–2% per year. This means your purchasing power is growing, but slowly. For short-term goals (emergency fund, house deposit within 2–3 years), a HISA is appropriate even with modest real returns. For long-term goals (retirement, 10+ years), relying solely on cash means accepting very slow real growth. The concern is not a loss, it is the opportunity cost of not investing in higher-returning assets.
- What assets protect against inflation in Australia?
- Equities (ASX shares and diversified ETFs) have historically been the strongest long-run inflation hedge, with real returns of ~6–7% p.a. over decades. Residential property in Australian capital cities has also outpaced inflation over long periods, though with much higher entry costs and lower liquidity. Inflation-linked bonds adjust their face value with CPI and guarantee a real return. Commodities (gold, oil) can hedge inflation in specific periods but are volatile. Cash and fixed-rate bonds tend to underperform during inflationary periods.
- How do I find out what a past amount of money is worth today?
- Switch the calculator to "Past value" mode, enter the historical dollar amount, how many years ago it's from, and an average inflation rate for that period. It applies the compounding rate in reverse to show today's equivalent purchasing power - for example, $50 in 1995 is worth roughly $110-120 today at Australia's long-run average inflation rate. This uses a single assumed rate for simplicity; for a figure based on actual historical quarterly CPI data rather than an estimate, the ABS publishes its own inflation calculator.
- Is this the same as the RBA's inflation calculator?
- No, but the two are complementary. The Reserve Bank of Australia publishes its own inflation calculator at rba.gov.au/calculator, which uses real historical quarterly CPI data to convert an amount between two actual past dates, for example, what $10 in 1970 would cost in 1990. It is historical only and does not project forward. This calculator works the other way: you choose an assumed annual rate, guided by the RBA's target or Australia's historical average, to project purchasing power into the future, which is useful for retirement and long-term planning where no real future CPI data can exist yet. For a precise historical conversion, the RBA's calculator is the more accurate choice; for future scenario planning, or a quick past-value estimate without needing quarterly CPI figures, use this one.
- How do I work out the inflation rate between two amounts myself?
- If you know a starting amount, an ending amount, and the number of years between them, the implied annual rate is (ending ÷ starting) raised to the power of (1 ÷ years), minus 1. For example, if $130 was only worth $125 in purchasing power after 2 years, the implied rate is (130 ÷ 125) to the power of 0.5, minus 1, approximately 2.0% per year. This calculator doesn't include a dedicated reverse-solve mode for this, but the formula above works for any two values, a real price change you've tracked, two CPI index figures, or a textbook problem.
- How does inflation affect my HECS/HELP debt?
- HECS/HELP debt is indexed each year on 1 June by whichever is lower, CPI or the Wage Price Index (a rule introduced in 2024), meaning your outstanding balance grows by that rate rather than a fixed interest rate. In most years this is modest, around 1.5–3%. The old CPI-only rule produced 7.1% for June 2023, reflecting the 2022 inflation spike, but that rate was retrospectively replaced with 3.2% and the ATO credited affected balances. Unlike a bank loan, HECS is not charged interest; indexation is applied once a year as a percentage of the balance at 1 June, which already includes earlier indexation. To reduce exposure in a high-indexation year, some Australians make voluntary repayments before 1 June to lower the balance before the adjustment is applied. Check your current HECS/HELP balance and upcoming indexation via myGov.