Should You Lower Your Repayments When Rates Fall?
Every time the RBA cuts the cash rate, millions of Australian borrowers get the same letter: "Good news — your minimum repayment has been reduced." It reads like a gift. It is actually a choice, and the default option is the one that suits your bank.
Accept the lower repayment and your monthly budget loosens — but your loan term stays exactly the same, and the bank collects interest for the full 30 years. Hold your repayment at the old amount and the gap between old and new becomes an automatic extra repayment, at zero cost to your lifestyle, because you were already paying it.
How it works
When your rate drops, the interest portion of each repayment shrinks. If the repayment itself stays fixed, the difference silently switches from paying interest to paying principal — the best possible trade. A 1% cut on a $500,000 balance redirects roughly $300 a month from the bank’s pocket to your principal.
It is the most painless strategy on this site because nothing about your life changes. Same direct debit, same budget, same coffee. The only thing that moves is the payoff date — and in a falling-rate cycle where cuts stack up, holding through each one multiplies the effect.
Five years in, Sarah's rate dropped from 6.5% to 5.5% and the bank helpfully cut her repayment. She called them back and asked to hold the old amount. That $300 extra a month — same budget line she was already used to — quietly cut years off the tail of the loan.
The worked example
The numbers on this page model a $500,000 loan at 6.5% over 30 years — a realistic Australian mortgage. Here is what changes when you apply the strategy (rate drop at year 5: −1.00%):
| Bank’s plan | With this strategy | Difference | |
|---|---|---|---|
| Time to pay off | 30.0 years | 25.8 years | −4.3 years |
| Total interest paid | $551,900 | $474,516 | −$77,385 |
Drag the slider to change the assumption and watch the payoff date move:
How to do it
- When a rate-cut letter arrives, note your current repayment amount before anything changes.
- Contact your lender (usually a five-minute call or an online setting) and ask to keep your repayment at the existing amount.
- Check your loan statement a month later to confirm the surplus is reducing principal.
- Repeat at every cut — in a cutting cycle the held amounts stack, and the compounding accelerates.
Watch-outs
- Some lenders reset repayments to the minimum automatically at each rate change — you may need to re-request the hold each time.
- If your budget is genuinely stretched, taking the lower repayment is a legitimate choice; this strategy is for borrowers who can keep paying what they already were.
- On interest-only loans this strategy doesn’t apply — there’s no principal component to accelerate.
Frequently asked questions
When interest rates drop, should I reduce my mortgage repayments?
Only if you need the cash-flow relief. If you can afford what you’re already paying, keeping the repayment unchanged converts the entire rate cut into extra principal repayment — typically cutting years off the loan without changing your budget at all. It’s the only mortgage strategy that costs literally nothing.
Do banks lower your repayment automatically when rates fall?
Most variable-rate lenders reduce your minimum repayment automatically (or at your next repayment recalculation) and notify you by letter or app. Holding the old amount usually requires you to actively opt in — by phone, or in many banking apps under repayment settings.
How much difference does holding repayments actually make?
It scales with the size of the cut and how early in the loan it happens. The worked example on this page — a 1% drop at year five of a $500,000 loan — shows the exact years and dollars. In a cycle of multiple cuts, holding through each one compounds the effect substantially.