How Reserve Bank cash rate decisions affect loan repayments

A Reserve Bank of Australia (RBA) cash rate decision does not change any home loan directly. The cash rate is a wholesale rate that banks pay each other for overnight funds. It matters to borrowers because it anchors the cost of the money that lenders raise, and lenders generally reprice their variable home loans shortly after the RBA moves. A borrower on a variable rate therefore tends to see a higher or lower minimum repayment within weeks of a decision, while a borrower on a fixed rate sees no change until the fixed term ends.

The size of the effect depends on the loan balance, the remaining term and whether the lender passes on the full change. On an illustrative $600,000 loan over 30 years, a 0.25 percentage point change moves the monthly principal and interest repayment by roughly $97.

What the cash rate is and why it matters

The RBA describes the cash rate as the market interest rate on overnight loans between financial institutions. Banks hold exchange settlement balances at the RBA to settle payments with each other, and they lend those balances overnight at the cash rate. The RBA sets a target for that rate. According to the RBA's explainer on implementation, the rate is held near the target through a corridor: the RBA pays slightly less than the target on balances deposited with it and charges more than the target on funds it lends, so banks have an incentive to trade with each other close to the target.

The cash rate is the RBA's main monetary policy tool. The RBA states that its objectives are price stability, full employment and financial stability, and that it operates a flexible inflation target of 2 to 3 per cent, aiming for the midpoint. When inflation is judged too high, the target is generally raised to slow borrowing and spending. When the economy is weak and inflation is low, it is generally lowered.

According to the RBA's cash rate statistics page, the cash rate target was 4.35 per cent as at 18 September 2026, following increases of 0.25 percentage points in each of February, March and May 2026 and no change at the June and August 2026 meetings. Readers should check the RBA website for the current target.

How the Reserve Bank makes cash rate decisions

Since 1 March 2025, cash rate decisions have been made by the RBA's Monetary Policy Board, which replaced the former Reserve Bank Board for this purpose. The RBA states that the Board consists of the Governor as chair, the Deputy Governor, the Secretary to the Treasury and six other members, and that it makes decisions independently of the government.

Meeting schedule

The Board meets eight times a year, and each meeting runs over two days. The RBA's published schedule for 2026 lists meetings in February, March, May, June, August, September, November and December, with the remaining 2026 meetings on 28 and 29 September, 2 and 3 November, and 7 and 8 December. Eight meetings are also scheduled for 2027.

Decision and announcement

• RBA staff prepare economic analysis and a policy recommendation before each meeting.
• The Board discusses the material and decides by majority vote.
• The decision is announced in a media release at 2.30 pm on the second day, and any change to the target takes effect the following day.
• The Governor holds a media conference at 3.30 pm on the same afternoon.
• Minutes are published two weeks later, and a quarterly Statement on Monetary Policy is released with the February, May, August and November decisions.

How a cash rate change reaches variable home loan rates

Lenders fund home loans from a mix of sources. According to an RBA Bulletin article published in May 2026, the major banks obtain about two thirds of their funding from deposits and nearly 30 per cent from wholesale debt, with equity making up the remainder. The interest rates on much of that funding are linked, directly or through hedging, to short-term money market rates such as the bank bill swap rate, and the RBA notes that those rates are heavily influenced by the cash rate and by expectations about where it is heading.

When the cash rate target changes, the cost of this funding moves in the same direction. Lenders then decide how much of the change to apply to their variable lending rates. The RBA's explainer on monetary policy transmission is careful on this point: the cash rate has a strong influence on lending and deposit rates, but the gap between them is not fixed. Conditions in funding markets, competition between lenders and the risk of different loan types all affect pricing.

Recent experience illustrates both outcomes:

• The May 2026 Bulletin article reports that banks fully passed through the 2025 cash rate reductions to rates on new variable housing loans, and raised rates broadly in line with the cash rate in early 2026.
• An earlier RBA Bulletin article found that between May 2022 and December 2023 the cash rate rose by 4.25 percentage points, while the average rate on all outstanding mortgages rose by about 3.20 percentage points, or around 75 per cent of the increase. The RBA attributed the gap mainly to the large share of borrowers then on fixed rates and to strong competition and discounting on variable loans.

How quickly lenders pass rate changes on

There is no legal requirement for a lender to move its variable rates when the cash rate moves, or to do so by a set date. In practice, lenders generally announce their response within days of an RBA decision and nominate an effective date, which commonly falls one to three weeks after the announcement. The effective date can differ between lenders and between increases and decreases, so borrowers may wish to check their own lender's notice.

Two further timing points are worth understanding:

• Rate change versus repayment change. Interest starts accruing at the new rate from the lender's effective date. The minimum repayment is usually recalculated afterwards, and the lender notifies the borrower of the new amount.
• Decreases may not reduce repayments automatically. Some lenders leave the repayment unchanged after a rate reduction unless the borrower asks for it to be lowered. Keeping the higher repayment shortens the loan, which the extra repayment calculator can illustrate.

The broader economic effect is much slower. The RBA estimates that monetary policy takes between one and two years to have its maximum effect.

Worked example: a 0.25 percentage point change on an illustrative loan

The following figures are hypothetical. They assume a $600,000 principal and interest loan with 30 years remaining, monthly repayments, and a lender that passes on each cash rate change in full. The rates are illustrative only and are not a statement of current market rates.

Illustrative variable rate	Monthly repayment	Change from 6.00%
6.00% p.a.	$3,597.30	Nil
6.25% p.a.	$3,694.30	$97.00 more per month
6.50% p.a.	$3,792.41	$195.11 more per month
7.00% p.a.	$3,991.81	$394.51 more per month

A single 0.25 percentage point increase adds $97.00 a month, or $1,164 a year, to the minimum repayment in this example. Four such moves add $394.51 a month, slightly more than four times $97. A reduction works the same way in reverse.

The effect scales with the balance. A useful rule of thumb from this example is about $16 a month for every $100,000 owing on a 30 year term, per 0.25 percentage point. On an interest-only loan of $600,000 the change is larger, at $125 a month, because no principal is being repaid to soften it. The mortgage repayment calculator can reproduce these figures for a specific balance and term.

What cash rate decisions mean for fixed rate borrowers

A borrower within a fixed rate period is insulated from cash rate changes in both directions. The repayment stays the same until the fixed term expires. At that point the loan generally reverts to the lender's variable rate unless the borrower fixes again or refinances, and the repayment is reset to whatever rates then apply. The RBA's analysis of the 2022 and 2023 tightening shows how large that reset can be: many borrowers who had fixed at around 2 to 2.5 per cent during the pandemic rolled onto rates near 6.5 per cent.

Two other points apply to fixed borrowers:

• New fixed rates are priced from market expectations of future cash rates rather than from the current target, so they often move before an RBA decision. The BorrowWise blog includes a separate article on why fixed rates change ahead of the cash rate.
• Leaving a fixed loan early can trigger break costs, which tend to be largest when market rates have fallen since the loan was fixed.

According to the May 2026 Bulletin article, fixed rate loans fell below 5 per cent of outstanding housing credit during 2025, a historic low. The RBA observes that this makes household repayments more sensitive to cash rate changes than they were earlier in the decade. Borrowers weighing the two structures can model scenarios with the fixed versus variable calculator.

Common mistakes when reading cash rate news

• Assuming full pass-through. Lenders generally follow the cash rate closely on variable loans, but they are not obliged to, and they sometimes move by more or less.
• Treating market pricing as a forecast. Financial market pricing of future cash rates is reported widely, but it changes frequently as new data arrive and it has often proved wrong. It describes what traders are paying for today, not what the Board will decide.
• Ignoring the gap between new and existing customers. Lenders often offer sharper rates to new borrowers, regardless of what the RBA does.
• Budgeting at today's rate only. Lenders assess new loans at a rate above the actual rate, and borrowers may find it prudent to test their own budget in the same way.

Practical steps for borrowers after an RBA decision

1. Check the lender's announcement for the size of the change and the effective date.
2. Confirm the new minimum repayment when the lender's notice arrives, and update any direct debits or budget.
3. After a rate decrease, consider whether to keep repayments at the previous level. After an increase, check whether funds in an offset account could be used more effectively.
4. Compare the current rate with what the same lender and competitors are offering new customers. The loan comparison page and the refinance calculator can help to estimate whether switching is worthwhile after costs.
5. Review the broader picture on the interest rates hub, and seek guidance from a licensed adviser or credit representative if repayments are becoming difficult.

This article provides general information only and does not take into account any individual's objectives, financial situation or needs.