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AussieCalc

Inflation Calculator Australia

Calculate how inflation erodes purchasing power over time, or find the today's-dollar equivalent of any past amount.

When to use

When you want to see how inflation erodes purchasing power, or compare the real value of a past or future dollar amount.

Who it's for

Anyone doing salary reviews, retirement planning, or historical cost comparisons who wants to account for the effect of inflation.

What you'll need

A dollar amount, an annual inflation rate, and a time period (years into the future or past).

What will today's dollars buy in the future?

Quick scenarios

$

A price, salary, or cost in today's dollars to project into the future.

How far ahead to project the inflation impact.

%

RBA target: 2–3%. Long-run AU average: ~2.5%. Recent peak (Dec 2022): 7.8%.

Uses compound inflation applied annually. Actual CPI varies each year. General guidance only, not financial advice.

Purchasing power over time

10-year projection at 2.5% p.a. inflation — hover to inspect each year

Purchasing power
Declining area chart showing purchasing power of $10,000 falling over 10 years at 2.5% inflation
PeriodPurchasing power
Yr 1$10K
Yr 2$10K
Yr 3$9K
Yr 4$9K
Yr 5$9K
Yr 6$9K
Yr 7$8K
Yr 8$8K
Yr 9$8K
Yr 10$8K

The orange dashed line shows your original $10,000 in today's dollars. The red area shows remaining purchasing power each year.

Year-by-year breakdown
YearPurchasing powerLost vs todayCumulative %
Year 1$9,756−$2442.4%
Year 2$9,518−$4824.8%
Year 3$9,286−$7147.1%
Year 4$9,060−$9409.4%
Year 5$8,839−$1,16111.6%
Year 6$8,623−$1,37713.8%
Year 7$8,413−$1,58715.9%
Year 8$8,207−$1,79317.9%
Year 9$8,007−$1,99319.9%
Year 10$7,812−$2,18821.9%

How inflation affects your money in Australia

What is inflation and how does it compound?

Inflation is the rate at which the general price level of goods and services rises over time, which is the same as saying the purchasing power of your money falls. At 3.5% inflation, $100 today buys the same as $96.62 next year. Over 10 years, that $100 buys only $71 worth of goods. Crucially, inflation compounds: each year's price rise is applied to prices already elevated by prior years. A sustained 3.5% rate over 20 years cuts purchasing power nearly in half, from $100 to $50.

Australian CPI explained

The Consumer Price Index (CPI) is measured quarterly by the Australian Bureau of Statistics (ABS). It tracks price changes across a representative basket of goods and services, housing, food, transport, healthcare, education, and recreation. The Reserve Bank targets CPI inflation of 2–3% per year over the medium term. From 1993 to 2019, Australian CPI averaged around 2.5% p.a. During 2021–2023, supply chain disruptions, energy price spikes, and stimulus spending pushed CPI to a peak of 7.8% in December 2022. Inflation has since moderated back toward 3–3.5%. The RBA also monitors the 'trimmed mean' (which strips out the top and bottom 15% of price changes), as its key measure of underlying inflation.

How inflation reduces purchasing power

If your savings account pays 2% interest but inflation runs at 3.5%, your real (inflation-adjusted) return is −1.5% per year. Your balance grows in nominal terms, but you can buy less with it each year. This is why Australian financial advisers emphasise real returns above inflation. Cash held in a low-rate account loses purchasing power every year. Even a HISA at 5% only generates a real return of ~1.5–2% in a 3–3.5% inflation environment, which is why long-term wealth building typically requires higher-returning assets.

Inflation vs investment returns

The real return on any investment is its nominal return minus inflation. A managed fund returning 8% in a 3.5% inflation environment delivers a real return of 4.5%, the actual rate at which your purchasing power grows. This distinction matters enormously over decades. At a 7% nominal return with 3% inflation, a $100,000 portfolio doubles in real terms in roughly 24 years. At the same 7% nominal return with 5% inflation, real doubling takes roughly 35 years, nearly half a lifetime longer. ASX shares have returned approximately 9–10% p.a. total before tax, well above the long-run 2.5–3% inflation rate. Super funds with growth allocations and diversified ETF portfolios also tend to outpace inflation over long horizons.

Why inflation matters for long-term wealth

The damage inflation does is rarely visible year to year, but it is dramatic over decades. At the RBA's 2.5% target midpoint, purchasing power halves in 28 years. At 3.5% (Australia's post-2000 average before the 2021 spike), it halves in about 20 years. Any long-term plan set in today's dollars without an inflation adjustment is likely to fall badly short. A retirement income target of $70,000 per year in today's money becomes a nominal need of roughly $127,000 per year in 20 years at 3% inflation. The gap between nominal and real is not a rounding error, it is the central question of long-term financial planning.

Worked examples

Weekly groceries — $180 per week at 3.5% food inflation over 10 years
A grocery shop costing $180 per week today would need to cost around $254 per week in 10 years just to buy the same items, at 3.5% average food inflation. That is roughly $9,360 per year today rising to approximately $13,200 per year, around $3,850 more per year on food alone. The 41% cumulative rise over the decade is driven entirely by compounding: each year's price increase is applied to prices already elevated by previous years. Enter $180, 3.5%, and 10 years in the calculator to see this.
Renting at $460 per week — 4% annual rent increases over 5 years
A rental property at $460 per week today would reach approximately $560 per week in five years at 4% annual increases, an extra $100 per week or roughly $5,200 more per year at the five-year mark. If your income grows at 2.5% (roughly CPI) while rent grows at 4%, housing takes an increasing share of your budget over time, not through a single dramatic increase but through the steady compounding of a 1.5 percentage point gap. Enter $460, 4%, and 5 years to see the purchasing power comparison.
House deposit target — 20% on a $600,000 property at 5% property growth
A first home buyer targeting a 20% deposit on a $600,000 property needs $120,000 today. If property prices rise at 5% per year, the same home costs roughly $766,000 in five years, pushing the required deposit to approximately $153,000. In 10 years, the property reaches around $977,000 and the deposit target climbs to $195,000. Enter $120,000, 5%, and the relevant years to watch the moving target. This is why saving faster than the rate of property price growth matters more than saving a fixed dollar amount.

Calculator assumptions

  • Annual compounding: Inflation is applied once per year. Real CPI is measured quarterly; actual compounding occurs continuously. Results are a close approximation, not an exact forecast.
  • Fixed rate throughout: The same inflation rate applies to every year in the projection. Actual inflation changes year to year and can deviate significantly, as the 2021–2023 period demonstrated.
  • Average basket vs your basket: CPI tracks price changes for an average household spending basket. Your personal inflation rate will differ based on your spending. Renters face higher housing inflation than homeowners; frequent drivers face more fuel inflation; food-heavy budgets are more sensitive to agricultural price swings.
  • Nominal outputs: All results are in nominal (not inflation-adjusted) dollars. The purchasing power figure shows the today-equivalent value of your amount. The "needed to maintain value" figure shows the future nominal amount required.

Common mistakes

Confusing nominal return with real return
A savings account paying 4.5% when inflation is 3.5% delivers a real return of about 1%, not 4.5%. The nominal figure is what your bank statement shows; the real return is what actually increases your purchasing power. When evaluating whether savings are keeping pace with inflation, real return is the only number that matters.
Assuming low inflation doesn't matter
At 2.5% annual inflation (the midpoint of the RBA's target), purchasing power halves in approximately 28 years. Small percentages over long periods have large effects. A 1% difference in the assumed inflation rate changes a 30-year retirement projection significantly, which is why the RBA actively manages it within a narrow band.
Using the 2022 peak rate for long-term projections
The 7.8% CPI peak in December 2022 was driven by post-pandemic supply shocks and energy prices, not a new normal. For projections beyond 3–5 years, the RBA's 2–3% target range is a more appropriate long-run assumption. Using the peak rate will significantly overstate purchasing power erosion in normal conditions.
Ignoring inflation in retirement planning
The most costly mistake is treating a retirement income target as a fixed dollar figure. $60,000 per year today requires roughly $108,000 per year in 20 years at 3% inflation just to maintain the same lifestyle. Super projections that don't factor in inflation often look far more comfortable than they are in real terms.

Frequently asked questions

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 moderated to approximately 3–3.5% annually through FY2025–26, down from a peak of 7.8% in December 2022. The RBA's target band is 2–3% over the medium term. The ABS publishes quarterly CPI data, which the RBA uses to guide interest rate decisions. Check the ABS website for the latest CPI figures. 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 is Australian inflation measured?
The Australian Bureau of Statistics (ABS) publishes the Consumer Price Index (CPI) quarterly. It tracks price changes across a representative basket of goods and services such as housing, food, transport, healthcare, education, clothing, recreation. The basket is reweighted periodically to reflect spending patterns. The RBA also monitors the 'trimmed mean' CPI (excluding the top and bottom 15% of price changes) as a measure of underlying inflation that strips out volatile one-off movements.
How does inflation affect my HECS/HELP debt?
HECS/HELP debt is indexed to CPI each year on 1 June, meaning your outstanding balance grows by the annual inflation rate rather than a fixed interest rate. In most years this is modest, around 1.5–3%, but in June 2023 the indexation rate was 7.1%, reflecting the 2022 inflation spike, which added thousands of dollars to many students' balances. Unlike a bank loan, HECS does not compound the indexed amount; each year's increase is a simple percentage of the balance at 1 June. To reduce exposure in a high-inflation year, some Australians make voluntary repayments before 1 June to lower the balance before the CPI adjustment is applied. Check your current HECS/HELP balance and upcoming indexation via myGov.

How this calculator works

Enter an amount, an annual inflation rate, and the number of years. The calculator can run in two directions: forward (what will today's money be worth in future terms; that is, how many future dollars you will need to match today's purchasing power) or backward (what was a past dollar amount worth in today's money). Both directions use the same underlying compound formula, just applied in opposite order.

The inflation rate you use matters enormously over long periods. At the RBA's target midpoint of 2.5% per year, purchasing power halves over about 28 years. At the 3.5% average of recent decades, it halves in roughly 20 years. Enter different rates to see the range: even a 1% difference in the annual rate produces a large gap in real purchasing power over a 20–30 year retirement horizon.

The most common use for this tool is retirement planning. A target income of $60,000 per year in today's money becomes a nominal target of roughly $110,000 at 3% inflation over 20 years. Ignoring inflation when setting a retirement income target is one of the most common planning mistakes, this calculator makes that adjustment straightforward.

Sources

Last updated: June 2026

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