Economic Management (Unit 4 Topic 3)
Build your own budget :: fiscal policy interactive simulator
How to Use the Budget Simulator
Start in the Build tab.
The sliders on the left are your policy levers, grouped into Revenue and Spending — switch between them to adjust areas of tax and spending.
Move any slider and three things update instantly: your budget balance, the fiscal stance badge, and the projection chart running to 2036–37.
Each lever displays its own budget impact, shown both in dollars and as a share of GDP. Use the $bn / % of GDP switch to compare the two framings — the difference over time is instructive.
The preset buttons load ready-made scenarios. Try Chase a surplus first, then ask yourself who paid for it.
For the underlying concepts — including why raising the GST barely improves the balance — open The Budget Explained. When you're ready, the Quiz tab will test your understanding.
Remember: every lever is a real trade-off. There is no costless option.
Data used to build this interactive is sourced from the 2026 Australian Federal Government Budget: budget.gov.au and pbo.gov.au
Australian Federal Budget / Fiscal Policy stance 1999 - 2026 :: interactive graph
How to use the interactive
Every year, the Australian Government spends money and collects revenue. The gap between the two is the underlying cash balance — a surplus when revenue exceeds spending, a deficit when it doesn't. This tool tracks that balance across 27 years, from the Howard surpluses through the GFC and COVID to today.
Tap any year card, or click a bar on the chart, to open that year up. The sidebar shows you the numbers — the balance in dollars, its size relative to GDP, unemployment and growth — while the panel below explains what was happening and why the government took the stance it did.
Why two measures? The dollar figure tells you the raw size; the percentage of GDP tells you whether it was actually large for the economy at the time. A $27bn deficit in 2008–09 and a $27.6bn deficit in 2024–25 look almost identical in dollars — but the economy has more than doubled, so the second is far smaller in real terms. Toggle the % of GDP line on and off to see the difference.
Watch for the pattern: surpluses when the economy is strong, deficits when it isn't. That's countercyclical fiscal policy — and it's the concept this whole chart is built around.
Australian Federal Government Debt 1999 - 2026 :: interactive graph
Government debt
When the government runs a deficit, it borrows — issuing bonds that must eventually be repaid. Run enough deficits and the debt stock builds. Run a surplus and it falls. This tool tracks 27 years of that story.
The key distinction is gross versus net debt. Gross debt is everything the government owes. Net debt subtracts the financial assets it holds — cash, investments, HELP student loans. In the "Dollars" view, the gap between the two lines is those assets. Watch what happens through the Howard years: gross debt sits flat around $55bn while net debt falls straight through zero into a net asset position. The government held more than it owed.
Then watch the GFC and COVID reverse it.
Tap any year card, or click the chart, to see the debt position alongside the budget balance and fiscal stance that produced it. Switch to "% of GDP" for the measure economists actually use — because debt only matters relative to the economy carrying it.
The pattern worth noticing: debt builds fast in crises and comes down slowly. Two surplus years after COVID repaid less than one deficit year added. That asymmetry is the whole argument for building buffers in good times.