What the RBA does and how its decisions affect your life
The Reserve Bank of Australia might be the most misunderstood institution in the country. Its decisions shape mortgages, savings, rents, inflation, jobs, government budgets, business investment — almost every financial aspect of life.
Yet most Australians have never read an RBA statement or watched an interest rate announcement.
They just see what it does to their mortgage.
This article breaks down, clearly and calmly, what the RBA is, what it does, why it raises and lowers interest rates, and how its decisions affect your household budget.
THE SHORT VERSION — WHAT THIS MEANS FOR YOU
-
The RBA raises rates to slow inflation
-
It cuts rates to support growth
-
Inflation is its primary focus
-
The RBA wants unemployment to be low — but not too low
-
Mortgages, rents, business credit, government borrowing, and even the stock market are affected
-
Rate hikes cool spending
-
Rate cuts encourage spending
And yes — the RBA knows higher interest rates hurt millions of Australians.
They do it because they believe the short-term pain prevents long-term pain.
1. WHAT EXACTLY IS THE RBA?
The Reserve Bank of Australia is:
-
The nation’s central bank
-
Independent from government
-
Tasked with stabilising prices and maintaining economic health
Its primary responsibilities include:
-
Setting the official cash rate (interest rates)
-
Ensuring inflation stays within the target band
-
Maintaining financial stability
-
Managing Australia’s currency and monetary policy
-
Advising government on economic conditions
-
Overseeing the payments system
RBA’s Inflation Target:
2–3%, on average, over the medium term.
Inflation is currently higher than that — which is why interest rates are high.
2. WHY DOES THE RBA RAISE AND LOWER INTEREST RATES?
Interest rates are the RBA’s main tool for controlling inflation and influencing economic activity.
Rates go UP when:
-
Inflation is high
-
Spending is too strong
-
Borrowing is cheap and abundant
-
The economy is overheating
Rates go DOWN when:
-
The economy is slowing
-
Jobs are at risk
-
Inflation is low
-
Consumption is weak
-
Businesses aren’t investing
Rate changes send signals to:
-
Banks
-
Businesses
-
Investors
-
Consumers
-
Global markets
And those signals guide financial behaviour.
3. HOW DOES THE RBA ACTUALLY CONTROL INFLATION?
Inflation rises when:
-
Demand > supply
-
Too many dollars chase too few goods
-
Energy or global events raise prices
-
Wages grow faster than productivity
-
Housing supply is tight
The RBA cannot build houses, fix supply chains or control energy shocks.
But it can make borrowing more expensive — which reduces demand.
How higher rates reduce inflation
-
Mortgages rise → households spend less
-
Businesses face higher credit costs → invest less
-
Savings accounts pay more → people save instead of spend
-
The dollar strengthens → imports get cheaper
-
The economy cools → inflation slows
This is painful — but it works.
4. THE CASH RATE: THE NUMBER THAT MOVES THE NATION
The most important number in the Australian economy is the cash rate.
What is the cash rate?
It’s the interest rate banks pay to borrow money from each other overnight.
Changes to the cash rate influence:
-
Home loan rates
-
Business loans
-
Consumer credit
-
Savings interest
-
Term deposit rates
Chart (described): Cash Rate 1990–2025
A line graph showing the cash rate at:
-
17% in 1990
-
Falling to 4–6% in the 2000s
-
Falling to 0.10% in 2020
-
Rising to more than 4% in 2023
-
Moderating slightly by 2025
The rise from 0.10% to over 4% in 18 months is the fastest tightening cycle in RBA history.
5. HOW RATE HIKES HURT HOUSEHOLDS
When the cash rate rises, mortgage repayments follow.
Mortgage Repayment Table: $600,000 loan
| Year | Rate | Monthly Repayment |
|---|---|---|
| 2021 | ~2% | ~$2,400 |
| 2023 | ~5.5% | ~$3,600 |
| 2025 | ~6% | ~$4,000+ |
