Five Australias, one number: the unequal bite of the cost-of-living crisis

The headline inflation rate is 4.6%. That number does not exist for any actual household.

Every quarter, the Australian Bureau of Statistics publishes a single inflation figure, and the country reacts as though it applies equally to everyone. Treasurer press conferences, Reserve Bank board minutes and breakfast-radio segments all orbit the same number. But beneath that headline sits a quieter dataset that almost nobody talks about: the Selected Living Cost Indexes.

The ABS computes a separate cost-of-living measure for five different household types — pensioners, employees, age pensioners, other government-transfer recipients, and self-funded retirees — each weighted by how those households actually spend their money. The differences are not academic. Over the past four years, the gap between the household that has been hit hardest and the one that has been most shielded amounts to thousands of real dollars.

This story uses three ABS datasets — the Consumer Price Index (cat. 6401.0), the Selected Living Cost Indexes (cat. 6467.0) and the Wage Price Index (cat. 6345.0) — all updated to the March 2026 quarter, to ask a question that one number can never answer: whose inflation are we actually talking about?

Four years of an inflation rollercoaster — and we are not done yet.

All-groups CPI vs Trimmed mean, annual change (%)

After peaking at 7.9% in late 2022, headline inflation drifted back toward the RBA’s 2–3% target band. Then in March 2026 it leapt to 4.6% — its first major step up in over a year. The trimmed mean, which strips out volatile items, tells a calmer story at 3.3%.

The green shaded band marks the RBA’s target range. Notice how the headline CPI spent almost two years above 5%, how it briefly touched the band in mid-2025, and how it has now bounced back out. The trimmed mean (dashed line) never fell as far — and never spiked as sharply — hinting that much of the headline volatility comes from a few specific groups, not broad-based pressure.

Source: ABS Consumer Price Index, Australia, March 2026 (cat. 6401.0).

That 4.6% makes the news. It shapes interest-rate expectations, political talking points, and how anxious you feel at the supermarket checkout. But here is the catch: it is a weighted average of every Australian household blended into one. Nobody actually lives at the average. An employee juggling a mortgage in Western Sydney does not experience the same inflation as a self-funded retiree who paid off their house decades ago.

To see why, we need to look beyond the CPI to a dataset the ABS publishes but that rarely makes the evening bulletin.

There is no average Australian. There are five.

Cost-of-living index by household type (Mar-22 = 100)

The ABS publishes a Living Cost Index for five household types, each weighted by the spending patterns of that group. Re-based to the start of the inflation surge in March 2022, the lines fan out — and the gap is widest precisely where you would expect.

Unlike the CPI, the Living Cost Indexes include mortgage interest charges. That single difference is transformative. When the RBA raised the cash rate from 0.10% to 4.35% between May 2022 and November 2023, households with a mortgage saw their repayments surge. Employee households — the red line — carry the heaviest mortgage exposure, and their cost-of-living index climbed relentlessly through 2022 and 2023. Self-funded retirees, who typically own their homes outright, barely felt this channel at all.

Source: ABS Selected Living Cost Indexes, March 2026 (cat. 6467.0). Index constructed by chaining quarterly movements from a Mar-22 = 100 base.

Same country. Same four years. Five measurably different experiences. Click the “Gap (Emp vs SFR)” button and the divergence is stark: the red line for Employee households pulls away from the grey Self-funded retiree line starting mid-2022, and the gap has never fully closed.

But how big is the gap in a single number? The next chart distils four years of quarterly movements into one cumulative figure for each household — and lets you shift the starting point to see how the story changes.

Mortgage-holders paid a 6.4-point penalty for the inflation crisis.

Cumulative cost-of-living change since selected start point (%)

Re-base whenever you like — the ranking rarely changes. Wage-earning households carrying rent or a mortgage have absorbed the biggest cumulative hit, while self-funded retirees who own their home outright have been comparatively shielded.

Since March 2022, Employee households have seen their cost of living rise by 24.1%. Over the same period, Self-funded retiree households experienced 17.7%. That 6.4-percentage-point gap may look modest as a number, but on a typical $70,000 annual household budget it compounds to roughly $4,500 in real spending power lost over four years. That is the difference between keeping up and falling behind.

The dashed vertical line marks where the headline CPI cumulative sits — notice how most household types have actually outpaced the CPI, meaning the “official” number understates their lived experience.

Source: ABS Selected Living Cost Indexes & Consumer Price Index, March 2026. Cumulative LCI computed by chaining quarterly movements; CPI cumulative compounded from published March-quarter annual prints.

“On a $70,000 household budget, that 6.4-point gap is roughly $4,500 over four years — enough to cover six months of groceries.”

The gap is not closing. Try clicking “Since Mar-24” — even in just the last two years, the Employee bar still stretches furthest. The structural driver is persistent: as long as the cash rate stays elevated, mortgage-exposed households keep paying more. So what, exactly, is doing the heavy lifting inside the CPI?

Housing is doing the heavy lifting. Transport just joined in.

Group contribution to annual CPI movement (percentage points)

The stacked bars decompose the headline CPI into its component groups. Each bar shows how many percentage points a given group contributed to the annual CPI reading that month.

Two patterns jump out. First, Housing (red) has been the single largest contributor every month since mid-2025, driven by rents, new-dwelling costs, and insurance. In January 2026 it accounted for 1.46 percentage points of a 3.8% headline — more than a third of total inflation from one group alone. Second, Transport (dark blue) swung from negative territory in early 2025 to a full +1.02 percentage points in March 2026 — largely because of a global oil-price spike. That single swing explains most of the headline’s jump from 2.4% to 4.6%.

Source: ABS Consumer Price Index, Australia, March 2026 (cat. 6401.0). “Other” = Clothing & footwear, Furnishings, Communication, Insurance & financial services.

This chart explains the gap in Chart 3. The CPI captures Housing via rents and new-dwelling purchase costs, but the LCI goes further by including mortgage interest charges. When the cash rate is high, every household with a variable-rate mortgage pays more — and that cost flows directly into the Employee and Pensioner LCIs but not into the Self-funded retiree LCI, because that group overwhelmingly owns outright.

Try double-clicking “Housing” in the legend to see its trajectory in isolation. It has been above 1.0 percentage points every month since September 2025 — a relentless, structural driver that affects mortgage-holders month after month. Now: if prices keep climbing, are wages at least keeping up?

Wages never caught the inflation wave. The gap closed — slightly.

Annual change: WPI vs CPI vs Employee LCI (%)

The Wage Price Index (WPI) measures how much employers are paying per hour of labour. At its peak in September 2023, annual wage growth hit 4.1% for the total economy (4.3% in the private sector). But at the same time, headline CPI was running at 5.4% and the Employee LCI was even higher. Wages never overtook prices during the inflation crisis — at best they briefly drew level.

Now, with the CPI jumping back to 4.6% in March 2026 while the WPI sits at 3.3%, a gap has re-opened. For wage-earners, this means real purchasing power is shrinking again after a brief respite. The dashed cherry line shows the Employee LCI — the “effective inflation” that wage-earning households actually face — which tracks higher than the headline CPI because of mortgage interest charges.

Sources: ABS Wage Price Index (cat. 6345.0), Consumer Price Index (cat. 6401.0), Selected Living Cost Indexes (cat. 6467.0) — all March 2026.

Click “Private sector” and compare the purple wage line against the red CPI line. Private wages peaked at 4.3% in September 2023 — at the same moment CPI was at 5.4%. The lines crossed briefly in early 2025, giving workers a rare quarter of positive real wage growth. But March 2026’s CPI rebound to 4.6% has pulled the rug out from under that crossover. For workers on standard wage agreements, inflation is once again outrunning their pay.

The takeaway. When a politician next says “inflation is 4.6%,” remember: that number does not exist for any actual household. It is a weighted average of five very different stories. For employee households carrying a mortgage, the real figure is closer to 24% over four years. For a self-funded retiree, it is closer to 18%. The gap is real, it is structural, and it is growing. Which story is yours?

Acknowledgements

• I acknowledge that I used Claude (Opus 4.7), a generative AI tool developed by Anthropic, during the preparation of this assessment. Its use was limited to: sense-checking the narrative angle against the brief and editor’s topic, reviewing and refactoring R/plotly code structure for readability, cross-checking computed cumulative LCI figures against the raw ABS data, and reviewing APA formatting of references.
• All data sources identified and used were independently verified and properly referenced. Claude was not used to generate the narrative content, story angle, chart designs, or multivariate strategies — these are entirely my own work.
• I also acknowledge the design guidance from the unit textbook chapters on multivariate strategy (Ch. 6), narrative data visualisation (Ch. 2), interactivity (Ch. 8) and dashboards (Ch. 10), and The Conversation brand guide for colour selection.
• I confirm that I have read and understood this declaration. If any part of this statement is not accurate, I understand that my submission may be considered invalid and excluded from assessment.

The datasets used for this assignment were downloaded directly from the Australian Bureau of Statistics open data portal (ABS, 2026a, 2026b, 2026c) and cross-checked against the published ABS key figures releases.

References

Allaire, J. J., Xie, Y., Dervieux, C., McPherson, J., Luraschi, J., Ushey, K., Atkins, A., Wickham, H., Cheng, J., Chang, W., & Iannone, R. (2024). rmarkdown: Dynamic documents for R (R package version 2.27) [Computer software]. Retrieved from https://CRAN.R-project.org/package=rmarkdown

Anthropic. (2026). Claude (Opus 4.7) [Large language model]. Retrieved from https://claude.ai

Australian Bureau of Statistics. (2026a, April 30). Consumer Price Index, Australia: March 2026 (Cat. no. 6401.0). ABS. Retrieved from https://www.abs.gov.au/statistics/economy/price-indexes-and-inflation/consumer-price-index-australia/latest-release

Australian Bureau of Statistics. (2026b, May 7). Selected Living Cost Indexes, Australia: March 2026 (Cat. no. 6467.0). ABS. Retrieved from https://www.abs.gov.au/statistics/economy/price-indexes-and-inflation/selected-living-cost-indexes-australia/latest-release

Australian Bureau of Statistics. (2026c, May 14). Wage Price Index, Australia: March 2026 (Cat. no. 6345.0). ABS. Retrieved from https://www.abs.gov.au/statistics/economy/price-indexes-and-inflation/wage-price-index-australia/latest-release

Reserve Bank of Australia. (2026). Cash rate target. Retrieved from https://www.rba.gov.au/statistics/cash-rate/

Sievert, C. (2020). Interactive web-based data visualization with R, plotly, and shiny. Chapman and Hall/CRC. Retrieved from https://plotly-r.com

The Conversation. (n.d.). Brand guidelines — Colour [Internal style document supplied with assignment].

Wickham, H., Averick, M., Bryan, J., Chang, W., D’Agostino McGowan, L., François, R., Grolemund, G., Hayes, A., Henry, L., Hester, J., Kuhn, M., Pedersen, T. L., Miller, E., Bache, S. M., Müller, K., Ooms, J., Robinson, D., Seidel, D. P., Spinu, V., … Yutani, H. (2019). Welcome to the tidyverse. Journal of Open Source Software, 4(43), 1686. https://doi.org/10.21105/joss.01686