Punch your numbers into the home loan calculator above and you’ll get a repayment figure in seconds. What most calculators don’t tell you is whether a lender would actually approve that number — that’s the gap this page fills, using the real 2026 rules banks apply, not just raw amortisation math.

What a Home Loan Calculator Actually Shows You

A basic repayment calculator answers one question: given a loan amount, rate, and term, what’s the monthly repayment? That’s useful, but it’s only half the picture. The number a calculator spits out and the number a bank will actually lend you are often different, because lenders don’t assess you at today’s rate — they test you against a higher one, as covered below.

This home loan calculator Australia tool covers both sides: the repayment figure you’d pay day-to-day, and a lender serviceability snapshot showing how a bank would likely view the same loan.

Current Home Loan Rates in Australia (2026)

The Reserve Bank of Australia held the cash rate at 4.35% through mid-2026, following three rate rises earlier in the year. Off the back of that, the average variable home loan rate sits around 5.9% p.a., though the spread between lenders is wide — some non-bank and digital lenders price below 5.7%, while the big four’s headline variable rates run closer to 6.5–6.7%.

That gap matters more than it looks. On a $600,000 loan over 30 years, a one-percentage-point difference in rate changes your total interest bill by well over $100,000 across the life of the loan. It’s worth comparing home loan rates properly before assuming your bank’s advertised rate is competitive — a mortgage broker or a comparison site can show you what’s actually available, not just what one lender offers existing customers.

How Lenders Assess Your Borrowing Power in 2026

This is the part most repayment calculators skip entirely, and it’s the actual reason many people get approved for less than they expected.

The 3% Serviceability Buffer

APRA requires lenders to check that you could still afford your repayments if your interest rate rose by 3 percentage points above whatever rate you’re applying at. So if you’re borrowing at 5.9%, the bank tests your finances as though you were paying close to 8.9%. This buffer hasn’t changed in several years and isn’t likely to move soon — it’s the single biggest reason your borrowing capacity is lower than a simple repayment calculation would suggest.

Debt-to-Income Scrutiny

Since February 2026, lenders have been paying closer attention to debt-to-income ratio — broadly, your total borrowing compared to your gross annual income. Loans sitting above roughly six times your income tend to draw extra questions, tighter conditions, or in some cases a lower approved amount. It isn’t a hard legal cap, but it functions as one in practice at most major lenders.

The calculator above includes both of these checks — enter your household income and it’ll show your assessment rate and debt-to-income ratio alongside your standard repayment figures.

Home Loan Repayment Calculator: Principal & Interest vs Interest Only

Most owner-occupiers use principal and interest repayments, where each payment reduces both the loan balance and the interest owed. Interest-only loans — more common among property investors — mean lower repayments for a set period, but the loan balance doesn’t shrink at all during that time, and most major lenders cap interest-only terms at five years for investment loans.

Run both loan types through the repayment calculator above before deciding. Interest-only looks cheaper month to month, but it typically means more total interest paid over the full loan term, since you’re not chipping away at the principal during the interest-only period.

First Home Buyer Schemes Worth Knowing About

If you’re a first home buyer, the numbers this calculator produces can look very different once you factor in government support:

• First Home Guarantee — buy with a 5% deposit and skip Lenders Mortgage Insurance entirely. As of October 2025, there’s no income cap and no limit on places, so far more buyers qualify than in previous years.
• Help to Buy — a shared equity scheme launched in December 2025. The government contributes up to 40% of the purchase price of a new home, meaning you can get in with just a 2% deposit. Income caps apply ($100,000 for individuals, $160,000 for joint applicants), and it can’t be combined with the First Home Guarantee.
• Family Home Guarantee — a 2% deposit option for eligible single parents and legal guardians, with no income cap.

These schemes change your deposit requirement and can remove LMI costs entirely, both of which shift the loan amount and repayment figures well beyond what a plain calculator shows.

Common Mistakes People Make When Estimating Repayments

• Using the advertised rate, not the comparison rate. The comparison rate folds in fees and charges, and it’s often noticeably higher than the flashy headline rate.
• Ignoring the serviceability buffer entirely. A repayment that looks comfortable at today’s rate needs to still be comfortable at rate-plus-3%, because that’s what the bank is actually testing.
• Forgetting Lenders Mortgage Insurance. Below a 20% deposit, LMI can add thousands to your upfront costs — unless you’re using a scheme like the First Home Guarantee that waives it.
• Not checking debt-to-income before house hunting. Finding out your borrowing capacity is lower than expected after you’ve made an offer is a bad place to discover a DTI problem.

How to Use This Home Loan Calculator

• Set your property price and deposit — the difference is your loan amount.
• Adjust the interest rate to whatever you’ve been quoted, or use the current average of 5.9% as a starting point.
• Choose principal & interest or interest-only to compare both repayment styles.
• Add your household income to see the real lender serviceability check — assessment rate and debt-to-income ratio, not just your raw repayment number.

For the full picture of what you can actually afford, pair this with our Australia salary after-tax calculator to see your real take-home pay, and our cost of living calculator to check what’s left over after everyday expenses.

Frequently Asked Questions

What’s a good home loan interest rate in Australia right now?

As of 2026, anything close to or below the 5.9% average variable rate is competitive. Non-bank and digital lenders often price below 5.7%, while the big four’s standard variable rates tend to sit higher — comparing multiple lenders rather than accepting your bank’s first offer usually pays off.

Why does my borrowing capacity look lower than my repayment calculator suggests?

Lenders apply a 3% serviceability buffer on top of your actual rate when assessing what you can afford, and increasingly weigh your debt-to-income ratio. A basic repayment calculator ignores both, which is why the bank’s number and the calculator’s number rarely match exactly.

What is the 3% serviceability buffer?

It’s an APRA requirement that lenders test your ability to repay a loan at your applied interest rate plus 3 percentage points, to make sure you could handle future rate rises. Source: APRA.

Do I need a 20% deposit to get a home loan?

No. Many lenders accept deposits as low as 5%, though you’ll usually pay Lenders Mortgage Insurance below 20%. The First Home Guarantee lets eligible first home buyers use a 5% deposit without paying LMI at all.

What’s the difference between the advertised rate and the comparison rate?

The advertised rate is just the interest rate. The comparison rate includes most fees and charges rolled into a single annual percentage, giving a more realistic picture of the loan’s true cost — always check both before comparing lenders.

Can I use this calculator for an investment property?

Yes — select “Investment” as the property type. Keep in mind investment loans are often assessed slightly more conservatively by lenders, and interest-only terms are typically capped at five years.

Explore More Australian Financial Calculators

• Australia Salary After-Tax Calculator — see your full take-home pay breakdown
• Superannuation Calculator — check your super, tax, and retirement projection
• Cost of Living Calculator Australia — measure expenses against your income
• ATO Tax Guide 2025–2026 — current tax brackets, offsets, and levies