When the Reserve Bank of Australia cuts the cash rate, most borrowers assume their mortgage repayment will drop automatically — and soon. The reality is more complicated. Whether your repayment actually falls, when it falls, and by how much all depend on your lender, your loan type, and whether you take action yourself. Here's what you need to know.
Variable rate loans: the basics
If you're on a variable rate home loan, a rate cut by the RBA does not automatically flow through to your loan. Your lender makes its own decision about whether to pass on the cut — in full, in part, or not at all. Most lenders do pass on some or all of an RBA cut to remain competitive, but the timing and amount varies significantly.
How the transmission works:
The RBA sets the cash rate target → lenders adjust their funding costs accordingly → lenders then decide what to do with their variable home loan rates → they announce changes (typically with 2–4 weeks' notice) → the new rate takes effect on your loan → your repayment may or may not change automatically.
That last step — whether your repayment changes — is where many borrowers are surprised.
The key distinction: automatic adjustment vs. unchanged repayment
Here is the most important thing to understand: even when your interest rate drops, your scheduled repayment amount is not always reduced to match. Many lenders keep your repayment the same by default, meaning the lower interest charge goes toward paying off your principal faster — effectively an involuntary extra repayment. Your cash flow doesn't improve unless you take action.
Repayment automatically decreases
Some lenders recalculate your minimum repayment when your rate changes and adjust the direct debit or scheduled payment accordingly. You see lower repayments immediately — no action required. Your loan term stays roughly the same.
Repayment stays the same — you pay off principal faster
Many major lenders keep your scheduled repayment at the same dollar amount after a rate cut. The reduced interest charge means more of each payment goes to principal. Your loan pays off ahead of schedule, but your monthly cash flow doesn't improve unless you call and request a reduction.
Fixed rate: no change until the fixed term ends
If you're on a fixed rate, an RBA rate cut has no effect on your loan until your fixed term expires. You're locked into your agreed rate regardless of what happens in the market. When your fixed term ends and you roll to variable, the then-current rate will apply.
Which lenders automatically adjust your repayments?
Lender policies on repayment adjustment are not always clearly disclosed upfront — and they can change. The table below reflects the general approach most major Australian lenders have taken historically, but you should confirm your own lender's current policy directly, as individual loan products and agreements can differ.
| Lender | Repayment after cut |
|---|---|
| ANZ | Repayment unchanged |
| Commonwealth Bank | Repayment unchanged |
| NAB | Repayment unchanged |
| Westpac | Automatically decrease |
| Bank of Melbourne | Automatically decrease |
| Bankwest | Automatically decrease |
| ING | Automatically decrease |
| Macquarie | Automatically decrease |
| ME Bank | Automatically decrease |
| St George | Automatically decrease |
| Suncorp | Repayment unchanged |
Always verify directly with your lender. Repayment policies can vary between loan products at the same bank, and lenders sometimes change their default approach. Don't assume — check your loan agreement, your online banking portal, or call your lender after any rate change. If you have an offset account or redraw facility, the treatment may also differ.
The dollar impact — what a rate cut actually means
The RBA typically moves the cash rate in 25 basis point (0.25%) increments. Most lenders pass on the full cut to variable rate borrowers, though some pass on less. Here's what a 0.25% rate reduction means in practice across different loan sizes:
| Loan Balance | Monthly Saving (0.25% cut) | Annual Saving |
|---|---|---|
| $400,000 | $83 | $1,000 |
| $600,000 | $125 | $1,500 |
| $800,000 | $167 | $2,000 |
| $1,000,000 | $208 | $2,500 |
Example: You have a $650,000 variable rate loan. The RBA cuts by 0.25% and your lender passes it on in full. Your rate drops — but if your lender doesn't automatically adjust your repayment, you won't see the roughly $135/month saving in your bank account unless you contact them. That saving, left untouched, instead reduces your loan balance faster — which is valuable, but doesn't help if you were counting on that cash flow relief.
Should you reduce your repayment — or keep it the same?
Just because you can reduce your repayment doesn't mean you should. There are genuine reasons to take either approach, and the right answer depends on your financial situation.
✓ Keep repayment the same
- Pay off your loan faster — potentially years sooner
- Save significantly on total interest paid over the loan life
- Build equity faster for future refinancing or equity release
- Rate cuts may be temporary — maintaining repayments buffers future rises
- Surplus builds in redraw — accessible if you need it later
✓ Reduce your repayment
- Improve monthly cash flow immediately
- Free up funds for higher-return investments
- Reduce financial stress if budgets are tight
- Redirect saving to offset account for equivalent interest saving with more flexibility
- Use surplus for other goals — school fees, renovations, emergency fund
The smart middle ground: If you have an offset account, consider keeping your repayment the same but redirecting the cash flow saving into your offset. You get the same interest reduction as paying down the loan — but the funds remain accessible. This combines the interest-saving benefit of maintaining repayments with the flexibility of being able to access the money later.
How to actually reduce your repayment after a rate cut
If you decide you want to take the cash flow benefit of a rate cut, the process is usually straightforward — but it does require you to act. Lenders won't typically do it for you.
Confirm your new interest rate
Check that your lender has actually passed on the rate cut — and in full. Log into your online banking, check your loan account details, or review any correspondence from your lender. The effective date of the new rate matters for timing.
Calculate your new minimum repayment
Based on your current loan balance, remaining term, and new interest rate, work out what your new minimum repayment should be. Most lender apps and websites include a repayment calculator. Your broker can also do this for you.
Contact your lender to update the repayment
Call your lender, use their app or internet banking portal, or visit a branch. Ask to have your scheduled repayment updated to the new minimum. Some lenders allow this instantly online; others require a phone call or written request.
Update any direct debits
If your repayment is set up as a direct debit from a transaction account, you'll need to update the amount separately. A lender changing the minimum repayment doesn't automatically update a direct debit that you originally set up yourself.
A rate cut is the perfect time to talk to a broker about your rate
A rate cut from the RBA creates one of the best windows of the year to review your mortgage — not just to pocket the cut you've been given, but to ask whether you're on the best rate available in the market at all. This is often called post-settlement pricing review, and it's one of the most underused strategies available to existing borrowers.
What is post-settlement pricing?
When you first take out a mortgage, your lender offers a competitive rate to win your business. Over time — particularly if rates have moved or you haven't reviewed your loan — your rate can drift higher than what the same lender would offer a new customer. Post-settlement pricing review is the process of going back to your lender (or the market) and negotiating a sharper rate based on your current position.
After a cash rate cut, lenders are actively adjusting their rate cards and competing for new business. That competitive tension is something a broker can use to your advantage.
What a broker does in a post-settlement review
Market comparison
Your broker compares your current rate against what you'd be offered as a new customer — both at your lender and across the broader market.
- Identifies the gap between your rate and the market
- Checks your LVR has improved (pays off at lower rates)
- Assesses whether your loan structure still suits you
- Identifies features you're paying for but not using
Retention pricing negotiation
Brokers negotiate directly with your lender's retention team — the team responsible for keeping existing customers — on your behalf.
- Retention teams often have discretionary rate discounts
- Brokers know what discounts are achievable
- Threat of refinancing creates genuine leverage
- No cost to you — the lender pays the broker
Refinance analysis
If your lender won't sharpen their rate, your broker can model the full cost and benefit of refinancing — including any break costs, fees, and the interest saving over time.
- Calculates net saving after all switching costs
- Identifies lenders with genuine new-customer incentives
- Manages the application process end-to-end
- Re-runs serviceability to confirm you qualify
Ongoing rate monitoring
A good broker doesn't just review your rate once — they monitor your loan over time and flag when a review is warranted, particularly after RBA movements.
- Regular rate health checks at no cost
- Alerts when better options become available
- Re-engages at key milestones (LVR drops, fixed expiry)
- One call versus researching the market yourself
Real-world example: A borrower on a $700,000 loan has been with the same lender for four years. Their current variable rate is 6.24%. After an RBA cut, the same lender is advertising 5.84% to new customers. Their broker identifies the 0.40% gap, negotiates a rate match from the retention team at no cost or paperwork, saving approximately $2,800 per year — more than ten times the value of the RBA cut alone. Without the broker review, the borrower would have pocketed only the 0.25% cut and remained 0.15% above the new-customer rate indefinitely.
When is the right time to review?
While any time is a valid time to review your rate, the period immediately following an RBA rate decision is particularly effective. Lenders have just updated their rate cards, competition between lenders is elevated, and there's a natural conversation opener — your current rate has just changed, which gives you a legitimate reason to reassess everything.
Signs it's time to talk to a broker:
• You haven't reviewed your rate in more than 12 months — the market moves constantly and loyalty rarely pays in home lending.
• Your LVR has improved — if your loan balance has reduced or your property value has risen, you may now sit in a lower LVR band that attracts a better rate.
• Your fixed rate is expiring — the rollover rate is rarely the best available. Negotiate before it expires, not after.
• Your income or circumstances have changed — a pay rise, a business improvement, or clearing other debts can strengthen your application and unlock better options.
• You're paying LMI interest on a capitalised premium — if your LVR has dropped below 80%, refinancing can remove that cost from your loan balance entirely.
The bottom line
A rate cut is good news — but it rarely delivers its full benefit passively. Whether your repayment automatically adjusts depends entirely on your lender's policy, and many of Australia's major banks default to keeping your repayment the same unless you ask for a change. More importantly, the RBA cut is just the starting point: the difference between the rate your lender gives you and the rate you could have — particularly as a loyal existing customer — is often far larger than the cut itself.
Action checklist after any rate cut:
1. Confirm your lender has actually passed on the cut — and by how much.
2. Decide whether you want to reduce your repayment or keep it the same and pay down faster.
3. Act — if you want lower repayments, contact your lender. They won't do it for you.
4. Review — use the rate cut as an opportunity to check whether your current rate is competitive in the market, not just relative to where it was last month.
5. Talk to a broker — a post-settlement pricing review costs you nothing and could save you thousands. Brokers have direct access to lender retention teams and know what discounts are achievable for borrowers in your position.
