41851 – Interest Rates: The Price of Money | Australian Property Network™

41851 — Interest Rates: The Price of Money

Overview

An interest rate is the price of using someone else’s money for a period of time. A borrower pays it; a saver or lender receives it. Expressed as a percentage of the amount borrowed per year, it is the single number that connects the decision to save with the decision to invest, the Reserve Bank’s policy meetings with a household’s mortgage statement, and today’s spending with tomorrow’s. Because almost every purchase of property in Australia is financed with borrowed money, no other economic variable matters more to the property market.

This entry explains what interest rates are and why there are many of them rather than one; how the Reserve Bank of Australia (RBA) sets the cash rate and why that one rate anchors the others; the difference between the rate printed on a loan and the rate that matters once inflation is accounted for; and the channels by which a change in the cash rate reaches jobs, prices, and house prices over the following one to two years.¹ The charts draw on the RBA’s own published history of the cash rate target from 1990 and of the banks’ standard variable housing rate from 1959, so that the full arc of Australian rate cycles is visible rather than only the most recent one.^7,8

Scope & Boundaries

This entry covers:

What an interest rate is, and the distinction between nominal and real rates
The cash rate: what it is, how the RBA implements it, and how it is decided
Why lending and deposit rates differ from the cash rate, and how the gap has changed over time
The transmission of monetary policy through saving, cash flow, asset prices, and the exchange rate
What all of this means in practice for property buyers, owners, and investors

This entry does not cover:

Inflation itself, how it is measured, and why the RBA targets it — addressed in 41852
The history and institutional design of central banks — addressed in 41821
Unconventional tools such as quantitative easing — addressed in 41824
Mortgage product selection and lending criteria — addressed in 41400 Property Finance

Scope Note

This entry is educational background within an editorial essay series. Its charts use the Reserve Bank of Australia’s published statistical tables and the Australian Bureau of Statistics consumer price index, cited in full at the end of the page. APN’s own certified reading of Australian interest-rate conditions is maintained separately at node 21210.

Key Concepts

Interest as a price

Money has a time value: a dollar today is worth more than a dollar in a year, because it can be spent or invested now. The interest rate is what a borrower pays to bring spending forward and what a lender is paid to defer it. Like any price, it balances supply and demand — the supply of savings looking for a return against the demand for funds to buy homes, build factories, or run a government deficit. Unlike most prices, one participant in the market, the central bank, has the power to set the shortest-term rate directly, and everything else adjusts around it.¹⁰

The cash rate

The cash rate is the interest rate that banks charge each other to borrow overnight, using the settlement balances they hold at the Reserve Bank. The RBA announces a target for this rate and keeps the actual rate close to it by operating an interest-rate corridor: it pays banks interest on their settlement balances at a rate 0.1 percentage points below the target, and stands ready to lend to them at 0.25 percentage points above it. No bank will lend to another for less than it can earn from the RBA, or borrow from another for more than the RBA charges, so the overnight market rate is held inside that band.² The cash rate is the shortest-term interest rate in the economy and the base from which longer-term and retail rates are priced.

Chart 1

RBA cash rate target, monthly average, August 1990 to August 2026 (per cent)

Source: Reserve Bank of Australia, Statistical Table F1.1, series FIRMMCRT. Each point is the monthly average of the target in force, so months containing a rate change show an intermediate value.

The published monthly series begins in August 1990 with the cash rate target at 14.00 per cent, as the RBA was already unwinding the tightening that preceded the early-1990s recession. It reached 4.75 per cent by mid-1993, rose to 7.50 per cent through the 1994 tightening, and moved within a band of roughly 4.25 to 7.25 per cent for the next fifteen years. The global financial crisis took it from 7.25 per cent in mid-2008 to 3.00 per cent by mid-2009. A long decline followed: 2.50 per cent in 2013, 1.50 per cent from late 2016, and 0.75 per cent by the end of 2019. The pandemic response took the target to 0.10 per cent, where it stayed from December 2020 to April 2022. The subsequent tightening was the fastest in the series, from 0.10 per cent to 4.35 per cent in eighteen months. The target was reduced in stages through 2025 to 3.60 per cent, and raised again from February 2026 to 4.35 per cent by June 2026.⁷

Nominal and real interest rates

The rate written on a loan or a term deposit is a nominal rate. The real rate is the nominal rate less the rate of inflation, and it is the real rate that measures what a borrower actually gives up or a saver actually gains in purchasing power. A 5 per cent deposit rate when inflation is 6 per cent leaves the saver poorer in real terms; a 3 per cent mortgage rate when inflation is 6 per cent means the loan is being eroded faster than it accrues interest. Central banks think in real terms: a cash rate of 4 per cent is restrictive when inflation is 2 per cent and loose when inflation is 6 per cent.

Chart 2

Real cash rate: cash rate target less annual trimmed-mean inflation, quarterly, 1990 Q3 to 2026 Q2 (percentage points)

Sources: RBA Statistical Table F1.1 (cash rate target, monthly average of the quarter’s final month); ABS Consumer Price Index, trimmed-mean series, annual change. The real rate shown is the simple difference between the two.

Measured against trimmed-mean inflation, the RBA’s preferred measure of underlying price pressure, the real cash rate was above 7 percentage points in 1990 and above 2 points for most of the period to 2008. It fell to around zero during 2009, hovered near zero through the 2010s, and went sharply negative in 2020–22: at its lowest, in the June quarter of 2022, the cash rate averaged 0.73 per cent against annual trimmed-mean inflation of 4.93 per cent, a real rate of minus 4.2 points. That is why the 2022–23 tightening had to be so large: a cash rate of 4.35 per cent only restored a modestly positive real rate once inflation had fallen below 4 per cent in 2024. By the June quarter of 2026 the real cash rate stood at +0.7 points, with the target at 4.35 per cent and trimmed-mean inflation at 3.65 per cent.^7,9

Why there are many interest rates

The cash rate is one overnight rate between banks. A home loan is a thirty-year contract with a household; a business loan carries the risk that the business fails; a government bond may run for ten years. Each of these rates is built up from the cash rate plus premiums for term (the longer the money is committed, the more the lender needs to be paid for the uncertainty), for credit risk (the chance the borrower defaults), and for the lender’s own funding and operating costs and margin. The pattern of rates across different terms is called the yield curve. Because most Australian mortgages are variable-rate, the rate that matters most to households is the banks’ standard variable rate, which moves with the cash rate but not one-for-one.

Chart 3

Cash rate target and banks’ standard variable owner-occupier housing rate, monthly, August 1990 to August 2026 (per cent)

Sources: RBA Statistical Table F1.1 (cash rate target, monthly average) and Statistical Table F5 (housing loans, banks, variable, standard, owner-occupier, compiled on the last working day of each month). The F5 rate is the advertised standard rate; most borrowers pay less after discounts, but the standard rate is the consistent long-run benchmark.

The gap between the two lines is the part of a mortgage rate that the cash rate does not explain. In August 1990 the standard variable rate was 16.38 per cent against a cash rate of 14.00 per cent, a gap of 2.4 percentage points. The gap averaged 2.8 points through the 1990s and narrowed to under 2 points in the 2000s as competition from non-bank lenders intensified. It widened after the global financial crisis as banks’ own funding costs rose relative to the cash rate, averaging 3.5 points through the 2010s, and it has averaged 4.4 points since 2020. In July 2026 the standard variable rate was 8.77 per cent against a 4.35 per cent cash rate. A borrower comparing today’s mortgage rate with a cash rate from an earlier decade is therefore comparing two different things: the same cash rate now implies a standard mortgage rate around 2 percentage points higher than it did in the mid-2000s.^7,8

Transmission: how a rate change reaches the economy

A change in the cash rate does not act on inflation directly. The RBA describes four channels through which it works.¹ The saving and investment channel: higher rates make saving more rewarding and borrowing to invest more expensive, so spending slows. The cash-flow channel: for households with variable-rate mortgages, a rate rise cuts disposable income immediately, while savers gain; because Australian households carry more mortgage debt than deposits, the net effect is to reduce spending. The asset prices and wealth channel: lower rates raise the price of assets, housing above all, because the same rental or dividend stream is worth more when discounted at a lower rate, and higher asset prices make owners feel wealthier and spend more; the reverse holds when rates rise. The exchange rate channel: higher Australian rates relative to overseas attract capital, lift the dollar, and make imports cheaper and exports less competitive. All four channels take time. The RBA’s own estimate is that “it takes between one and two years for monetary policy to have its maximum effect”, which is why the cash rate is set with a view to where inflation will be, not where it is.¹

Regulatory & Legal Framework

The cash rate is set under the Reserve Bank Act 1959 (Cth).⁶ Since 1 March 2025 the decision has rested with the RBA’s Monetary Policy Board, a nine-member body chaired by the Governor with the Deputy Governor, the Secretary to the Treasury, and six non-executive members appointed by the Treasurer. Section 9B of the Act directs the Board to set monetary policy “in a manner that it believes best contributes to both price stability and the maintenance of full employment in Australia”. The Board meets eight times a year, and the Governor holds a media conference after each meeting to explain the decision.⁵

How the Board interprets “price stability” is set out in the Statement on the Conduct of Monetary Policy, an agreement between the Treasurer and the Bank that has been renewed periodically since the first in August 1996; the current Statement dates from July 2025.⁴ The operational target it records is to keep annual consumer price inflation between 2 and 3 per cent, with the Bank setting policy so that inflation is expected to return to the midpoint of that range. The target was adopted informally in the early 1990s and formalised in the 1996 Statement.³ It is a flexible target rather than a rigid ceiling: the RBA does not attempt to hold inflation inside the band every quarter, but to bring it back toward 2.5 per cent over a horizon consistent with the one-to-two-year transmission lag.

Retail interest rates are not regulated. Banks set their own lending and deposit rates commercially, subject to consumer-credit conduct rules and to prudential standards on how conservatively they must assess a borrower’s ability to service a loan at rates above the one actually charged. Those standards, set by the Australian Prudential Regulation Authority, are addressed in 41400 Property Finance.

Practical Application

Repayments. The cash-flow channel is not an abstraction for a mortgaged household. On a $600,000 loan repaid over thirty years, the banks’ standard variable rate of 4.52 per cent that prevailed from March 2020 to April 2022 implied a monthly repayment of about $3,050. At the 8.77 per cent standard rate reached in November 2023, the same loan cost about $4,730 a month, an increase of roughly $1,680, or 55 per cent. At the 8.02 per cent standard rate of late 2025, the figure was about $4,410.⁸ Actual rates paid were lower than the standard rate for most borrowers, but the proportional change was similar, and it arrived within months of each cash rate decision because the majority of Australian mortgages are variable.

Prices. The asset-price channel explains why property prices are so sensitive to interest rates. A buyer’s maximum purchase price is set largely by how much they can borrow, and how much they can borrow is set by how much of their income the repayments consume. When the standard variable rate roughly doubled between early 2022 and late 2023, the loan that a given repayment could support fell by more than a third. That did not translate into an equivalent fall in prices, because supply constraints, population growth, and the share of buyers not relying on maximum borrowing all cushioned the effect, but it changed who could buy and what they could pay.

Fixed or variable. A fixed rate is priced off the expected path of the cash rate over the fixed term plus a term premium, not off today’s cash rate. When lenders expect rates to fall, fixed rates sit below variable rates, and the reverse when they expect rises. A borrower fixing is therefore buying certainty, not necessarily a lower rate, and is paying the market’s expectation of future cash rates in advance. Chart 3 shows why the timing matters: a borrower who fixed at the 2021 lows was insulated from the 2022–23 rises for the length of the term; one who fixed in late 2023 paid for protection against rises that did not come until 2026.

Reading a rate decision. Because policy works with a lag of a year or more, the RBA’s decisions are forward-looking and the accompanying statement matters as much as the number. For property decisions the useful questions are not “did rates move today” but “where does the market expect the cash rate to be in two years, and what mortgage rate does that imply given the current gap between the two”.

Cross-Series References

41822

Monetary Policy Tools

How the RBA’s instruments work in practice, from the cash rate to bond purchases.

41823

Inflation and Deflation

Why prices rise and fall, and what each does to borrowers and savers.

21210

Interest Rates (APN certified reading)

APN’s live certified reading of where Australian rates sit against their long-run baseline.

41400

Property Finance

Mortgage structures, fixed versus variable, and how lenders assess a borrower.

Sources

This entry is part of the Understanding Money editorial essay series and is presented for general educational context. APN’s certified reading of current Australian interest-rate conditions is maintained at node 21210, Interest Rates.

41851 – Interest Rates: The Price of Money