Most Australians treat their home loan rate like the weather. Something that happens to them. But rates are not weather. They are built, piece by piece, by lenders working off a wholesale benchmark, their own funding costs and what they think of you as a borrower.
Once you can see those three pieces, almost everything that looks confusing about home loan rates starts to make sense. Why two borrowers at the same bank get different rates. Why your rate moved when the RBA held the cash rate steady. Why the comparison rate next to the headline rate is sometimes 0.05% higher and sometimes 0.50% higher. None of that is random. It is just the system working as designed.
If you want to skip the explainer and just compare actual loan options, head to our home loans hub or use the form below to speak with a specialist.
The three forces that set every Australian home loan rate
Every variable home loan rate in Australia is built from three layers. The RBA cash rate sets the wholesale baseline. The lender's funding costs add the next layer, because banks have to source money from somewhere before they can lend it to you. Your individual risk profile sets the final adjustment, which is why two borrowers can sit down with the same lender on the same day and walk out with different rates.
How a variable rate is built
- Lender's base variable rate moves with funding costs over time
- A discount is applied based on your LVR, loan size and purpose
- Final rate adjusts when the lender repasses funding costs, not on a fixed schedule
- RBA decisions are passed on at the lender's discretion within 1 to 4 weeks
- You can usually negotiate the discount at application and later through the life of the loan
How a fixed rate is built
- Priced off wholesale swap markets for the chosen fixed term, not the cash rate directly
- Already prices in what the market expects rates to do over the term
- Locked once settlement happens, unless you pay a rate lock fee earlier
- Break costs apply if you exit, refinance or sell during the fixed period
- Reverts to the lender's standard variable rate once the fixed period ends
The RBA influences rates. It does not set yours.
This is the distinction that confuses most borrowers. The RBA sets the cash rate, which is the rate banks charge each other for overnight unsecured loans. Your home loan rate is not the cash rate. It sits well above it, with a series of margins layered on top. When the RBA moves, lenders generally follow, but they are not obliged to pass the change through in full, and they sometimes move rates when the RBA has not.
Funding costs explain a lot of the gap
Australian banks fund their lending from a few sources. Around two-thirds comes from deposits, with the remainder from wholesale debt (bonds and short-term paper) and equity. Most of that funding is linked, directly or through hedging, to the Bank Bill Swap Rate (BBSW), which is itself heavily influenced by the cash rate and where markets expect it to go.
When deposit competition heats up, or wholesale funding markets get expensive, the gap between the cash rate and your home loan rate widens. That is why a bank can lift variable rates even on a month the RBA stayed put. Funding moved. Your rate followed.
Your risk profile fills in the last gap
Once the lender knows its base rate, it applies discounts and loadings based on you. An owner-occupier paying principal and interest at a 60% LVR usually gets the sharpest pricing. An investor on interest-only at a 90% LVR sits at the other end. Everything else falls somewhere between those two extremes.
The four main types of home loan interest rate
Most Australian home loans fall into one of four interest rate structures. Each one has a different reason for existing and a different trade-off between flexibility and certainty.
Variable rate
Moves over time based on lender funding costs, competitive pricing and RBA decisions. Comes with the most flexibility: offset accounts, unlimited extra repayments, redraw, and no break costs if you refinance or sell. Most Australian home loans are variable, including most refinances. The trade-off is that your repayments can rise without warning.
PFH variable rate guideFixed rate
Locks your rate for a set period, typically 1 to 5 years. Repayments stay the same regardless of what the RBA does. The catch: limited or no offset, capped extra repayments (often $10,000 to $30,000 per year), and break costs if you exit the fixed period early. After the fixed term ends, the loan reverts to the lender's variable rate, which is usually higher than the discounted variable rate available to new customers.
PFH fixed rate guideSplit rate
Splits the loan into fixed and variable portions. Common splits are 50/50, 60/40 or 70/30. The fixed portion gives repayment certainty while the variable portion keeps offset access and flexibility. Useful when you want some protection against rate rises without giving up all flexibility. Both portions still get assessed under the same serviceability rules.
Interest-only vs principal and interest
Most loans default to principal and interest (P&I), where each repayment chips away at both. Interest-only loans pay only the interest for an agreed period, typically 1 to 5 years, then revert to P&I. Interest-only rates are usually 0.30 to 0.50 percentage points higher than P&I rates because the lender carries more risk. Often used by investors for cash flow management, less common for owner-occupiers.
Owner-occupier vs investor pricing
Not strictly a rate type but a pricing tier that sits across all of the above. Investor rates are typically 0.20 to 0.40 percentage points higher than owner-occupier rates on the same product. APRA macroprudential rules and lender appetite for investor lending both influence this gap, and it can widen or narrow depending on market conditions.
Reverting rates and discounts
Most "headline" variable rates are actually the lender's Standard Variable Rate minus a discount. The discount is what you negotiate. After settlement, the SVR moves with funding costs, and the discount stays put. So if you do not check your rate every couple of years, the SVR creeps up and your effective rate quietly does too. This is how loyal borrowers end up on uncompetitive rates without realising.
How an RBA cash rate change reaches your home loan
When the RBA moves the cash rate, the change does not land on your loan the next morning. It travels through several intermediate markets first, and lenders make a separate decision at each step about whether and how much to pass on.
As of May 2026, the cash rate sits at 4.35% after the RBA's third hike of the year on 5 May 2026. Here is how a change at that level typically flows through to a variable home loan rate.
| Step | What happens | Typical timing |
|---|---|---|
| 1. RBA decision | The Monetary Policy Board announces the cash rate target at 2:30pm on decision day, with the change effective the following day. | Day 0 |
| 2. Wholesale markets reprice | Short-term funding rates such as BBSW move within hours. Bond markets and swap markets reprice in line with the new cash rate path. | Same day |
| 3. Lender funding cost shifts | The cost of new deposits and new wholesale debt changes. Existing fixed-rate funding does not, which is why pass-through is partial. | Days to weeks |
| 4. Lender announces rate change | Each lender announces whether it is passing on the change, how much, and the effective date. The big four usually move within 1 to 14 days. | 1 to 2 weeks |
| 5. Borrower repayment adjusts | Your minimum repayment changes from the effective date. Direct debits update automatically. You may see one transition month at a blended rate. | 2 to 6 weeks |
Timings are typical. Lenders are not obliged to pass on RBA changes and can move rates independently of the cash rate.
Why pass-through is rarely 100%
When the RBA cuts 0.25%, banks do not always cut 0.25%. The reason comes back to funding mix. Deposit rates are partly under bank control and partly competitive, so they often move less than the cash rate. Hedging of fixed-rate funding adds another lag. So a lender passing on 0.20% out of a 0.25% cut is not being cynical, it is reflecting actual funding economics. Sometimes.
Why lenders sometimes move out of cycle
Lenders also lift or cut rates without the RBA moving at all. Common reasons: wholesale funding costs rising due to global market conditions, deposit competition heating up, regulatory capital requirements changing, or simply a strategic decision to rebalance the loan book. If you ever see a single lender move while every other lender holds, that last one is usually the reason.
For commentary on where rates are likely to head next, see our regularly updated interest rate forecast. For specifically how this affects refinancing decisions, see fixed rate expiry refinancing.
What determines the rate you are actually offered
Two borrowers can apply to the same lender on the same day and be offered rates that differ by 0.50 percentage points or more. That gap is not negotiation alone. It is the result of how the lender views each applicant against a set of risk factors. Here are the ones that move your rate the most:
Usually the biggest single factor. Most lenders price in tiers: under 60%, 60% to 80%, 80% to 90%, and over 90%. The under-60% band typically gets the sharpest pricing. See our LVR guide for the detail.
Larger loans (often $750,000 or $1,000,000 plus) frequently attract a sharper discount, because the lender earns more on the same risk profile. Smaller loans sometimes carry less negotiating room because the absolute revenue is lower.
Owner-occupier loans almost always price lower than investor loans on the same product, typically by 0.20 to 0.40 percentage points. APRA macroprudential settings and lender appetite for investor lending both feed into this gap.
Principal and interest is the lender's preferred structure and prices accordingly. Interest-only repayments are typically 0.30 to 0.50 percentage points more expensive because the lender carries more risk during the IO period.
Fixed rates and variable rates are priced off different markets, so the gap between them changes month to month. When markets expect rates to fall, fixed rates often sit below variable. When markets expect rises, fixed rates often sit above. Today's gap is not a forecast, but it is a signal of where markets are leaning.
Defaults, late payments, multiple recent enquiries and prior bankruptcy all affect both whether you are approved and the rate you are offered. Specialist lenders accept impaired credit but typically price 1 to 3 percentage points above the standard market.
PAYG with long tenure attracts the sharpest pricing from the widest lender panel. Casual, contract and self-employed income can still get prime pricing, but with fewer lenders and more documentation. Income type rarely changes the headline rate at any single lender, but it changes which lenders will compete for you.
Standard houses and townhouses in metro areas usually attract no rate loading. Small apartments (under 40 to 50 sqm), high-density buildings, mixed-use properties and some regional locations can move you into a more conservative pricing tier or limit you to specific lenders.
The biggest variable of all. A 0.30 to 0.50 percentage point gap between two competitive lenders for the same borrower profile is common. The wrong lender for your situation can quietly cost you tens of thousands over the life of the loan.
Most variable rates are negotiable, both at application and afterwards. The strongest positions: an LVR below 80%, a clean repayment history of 12 months or more, and a comparable offer from another lender in your back pocket.
Comparison rate versus headline rate
Every home loan ad in Australia shows two numbers: the headline interest rate and a comparison rate sitting next to it. The comparison rate is usually higher. Most borrowers ignore it and focus on the headline. That can be an expensive habit.
The comparison rate exists because lenders can advertise sharp headline rates while attaching ongoing fees, application fees, package fees and revert rates. The National Consumer Credit Protection Act 2009 requires lenders to publish a comparison rate to make those costs visible.
How the comparison rate is calculated
Every comparison rate in Australia uses the same standardised formula: a $150,000 loan over 25 years on principal and interest. The formula takes the headline rate, layers in mandatory fees, accounts for the revert rate after any fixed period, and solves for the effective annual rate.
Because the formula is standardised, two lenders' comparison rates can be compared on a like-for-like basis. The headline rate alone cannot.
| What it includes | What it does not include |
|---|---|
| The headline interest rate | Lenders Mortgage Insurance (LMI) |
| Establishment and application fees | Government fees (stamp duty, mortgage registration) |
| Ongoing monthly or annual fees | Early exit fees or break costs on fixed loans |
| Settlement and valuation fees (if charged) | Fees for optional features such as offset or redraw if separately charged |
| The revert rate after any fixed period | Your actual loan size if it differs from $150,000 |
| Discharge or exit fees | Your actual loan term if it differs from 25 years |
Why the comparison rate has limits
The $150,000 / 25-year baseline is much smaller and shorter than most Australian mortgages. Most borrowers take out $500,000 to $1,000,000 over 30 years. At those amounts, fees become a smaller proportion of total cost, so the comparison rate tends to overstate the impact of fees on your actual loan.
For fixed-rate loans, the comparison rate assumes the loan rolls onto the lender's standard variable rate (SVR) after the fixed period. In practice, most borrowers refinance, refix or negotiate at the end of the fixed term. So the fixed-rate comparison rate often reflects a worst-case path you never actually walk.
What a small rate difference actually costs you
People sometimes treat a 0.50 percentage point gap as a rounding error. On a typical Australian mortgage it is not. Here is what the same loan looks like at two different rates, all other factors held equal.
That 0.50 percentage point gap is real money. It is also why negotiating your rate, getting a competitive lender from the start, and reviewing your rate every couple of years matters more than most borrowers assume. The interest you do not pay is the cheapest money you will ever save.
Common interest rate mistakes
Most rate-related mistakes are not about choosing the wrong product. They are about assumptions: that the headline rate is the whole story, that the RBA controls your rate, or that the rate you got at settlement is the rate you should still be paying three years later.
Choosing on headline rate alone
A 5.89% headline with a 6.45% comparison rate is not the same loan as a 5.99% headline with a 6.04% comparison rate. The second loan is cheaper in real terms because it carries far fewer fees. Use the comparison rate as a sanity check before celebrating a sharp headline number.
Always read both numbers. The gap between them is the lender's fee story.
Assuming the RBA sets your rate
The cash rate is one input, not the answer. Lenders move rates between RBA meetings all the time. They pass on RBA changes partially. They sometimes lift rates while the RBA holds. If you only watch RBA decisions, you will miss most of the actual changes to your home loan rate.
Watch your lender's own rate announcements, not just the RBA.
Locking everything fixed in a rising cycle
Fixed rates already price in expected future rate movements. Locking 100% of your loan at the top of an expected hiking cycle can lead to paying above market for years if the cycle turns. Splitting fixed and variable usually gives a better balance of certainty and flexibility for most borrowers.
Consider a split before locking the full loan.
Never reviewing the rate after settlement
The discount you negotiated at settlement is fixed. The lender's standard variable rate is not. Over 2 to 3 years, the SVR creeps up while the discount stays put. Long-term borrowers routinely sit 0.30 to 0.70 percentage points above what new customers can get at the same lender. Asking for a rate review costs nothing.
Review your rate every 12 to 24 months.
Choosing a loan on the cashback offer
A $3,000 to $5,000 cashback feels great at settlement. It can also be a signal that the underlying rate is uncompetitive. On a $600,000 loan, an extra 0.20 percentage points costs around $28,000 of interest over 30 years. The cashback often pays for itself in your lender's favour, not yours.
Always model rate over the life of the loan, not the first year.
Ignoring serviceability buffer in your plan
APRA requires lenders to test your repayment capacity at the loan rate plus 3 percentage points. So a loan at 6.00% is assessed at 9.00%. Borrowers who plan their budget on the actual rate, not the buffered rate, end up with no margin if rates rise. Stress-test your repayments at the buffered rate, not the headline.
Test your budget at your rate plus 3%, not just today's rate.
Common interest rate scenarios
Refinancer rolling off a fixed rate
If you fixed in 2022 or 2023 at 2% to 3%, you are looking at a revert rate well above 6%. The standard variable rate your lender will roll you onto is almost never the sharpest rate they offer. A rate review before expiry, or a refinance to a competitor, almost always saves money. Start the conversation 3 to 6 months before the fixed period ends so you are not locked into a default outcome.
First home buyer with a small deposit
At a high LVR (over 90%), most lenders apply a higher risk-based rate, on top of the LMI premium. If you qualify for the Home Guarantee Scheme, you avoid LMI but the lender still treats the loan as a higher-LVR risk for pricing. Compare rates across participating lenders rather than going to the first one you talk to. The gap between scheme lenders can be 0.30 percentage points or more.
Established owner with low LVR
If your loan is now at 60% LVR or below after years of repayments and property growth, you sit in the lender's best risk tier. That position is not automatically reflected in your rate. Ask for a repricing based on the updated LVR. If the lender will not move, a refinance to a competitor that explicitly prices the under-60% band can save tens of thousands.
Investor on interest-only
Investor and interest-only loans both carry rate loadings, and the two combine. On the same loan amount and LVR, an investor IO rate is typically 0.50 to 0.80 percentage points higher than an owner-occupier P&I rate. Some lenders specialise in investor lending and price it more competitively than others. Lender choice matters more here than in any other scenario. See our investment property refinancing guide for the detail.
When should you get help with your interest rate?
The short answer: any time you suspect your rate is not competitive, or you are about to commit to one for the long term. A finance specialist can run the numbers against current market pricing in a way that a single lender will not, because they have visibility across the panel. The clearest signals it is time to ask:
If any of these apply, a finance specialist can assess your current position, compare it against the wider lender panel, and tell you whether the savings justify a repricing request or a full refinance.
