How to Pay Off Your Mortgage Faster
The real levers: extra repayments, offset accounts vs redraw, lump sums, and refinancing, plus the honest trade-off with investing instead.
8 min read
Try it yourself
A handful of unglamorous levers make the real difference to how long a mortgage actually takes to pay off, and how much interest you pay along the way. None of them are secrets, they're just easy to underestimate. This is part of a wider guide to property and debt on Snowball Invest.
Quick answer
The biggest levers are making extra repayments beyond the minimum, using an offset account to reduce the interest charged on your everyday cash, and periodically checking whether refinancing to a lower rate makes sense. Even modest, consistent extra repayments meaningfully cut both the loan term and the total interest paid.
In this guide
- โExtra repayments, the biggest lever, and how they compound in your favour
- โOffset accounts vs redraw facilities, and how big a buffer other Australians actually hold
- โPutting lump sums to work, and refinancing to a better rate
- โThe genuine trade-off between paying down faster and investing instead
๐ช Extra repayments, the biggest lever
Every dollar paid above your minimum repayment reduces your principal immediately, which means every future interest calculation is based on a smaller balance. Because mortgage interest compounds against you the same way investment returns compound for you, extra repayments made earlier in the loan have an outsized effect compared to the same extra amount made later.
๐ See what extra repayments actually save you
Compare your loan with and without extra repayments, using your own numbers.
๐ Offset accounts vs redraw facilities
| Offset account | Redraw facility | |
|---|---|---|
| How it works | A linked transaction account, its balance reduces the interest charged on your loan | Lets you withdraw extra repayments you've already made |
| Access to funds | Usually instant, like a normal bank account | Can have withdrawal limits, delays, or fees depending on the lender |
| Best suited to | Everyday cash you want working against interest without locking it away | Genuine extra repayments you're confident you won't need back regularly |
Both achieve a similar underlying goal, less interest charged, without fully committing your money to the loan. Which one suits you better usually comes down to how often you expect to need access to that money, covered in more detail in our offset vs redraw breakdown.
๐ How big a buffer other Australians actually hold
๐ฏ The essential: The typical established mortgage holder is sitting well ahead of schedule, but new borrowers are the exception, and the ones most worth building a buffer deliberately.
The Reserve Bank tracks how far ahead of their scheduled repayments Australian mortgage holders actually sit, combining offset balances and redraw available. Its most recent Financial Stability Review data put the median borrower's prepayment buffer at somewhere between 10 and 15 months of scheduled repayments, larger than it was before the pandemic for every income group except the very top, which held closer to two years' worth on its own. That's a genuinely large cushion, built up gradually through exactly the extra repayments and offset habits covered in this article.
The RBA has flagged an important exception worth knowing, though: those buffers are concentrated in established loans, borrowers who've had years to build them up. Newer borrowers typically hold far smaller buffers, simply because they haven't had the time, while often carrying larger loans taken out more recently. If you're early in a mortgage, the national "months ahead" figure isn't yet describing your own position, and building toward it deliberately, rather than assuming it happens automatically, is exactly the gap the extra-repayment and offset habits above are meant to close.
๐ฐ Putting lump sums to work
A tax return, bonus, or inheritance directed straight into an offset account or as an extra repayment has an immediate, guaranteed effect: less interest charged from that point forward. There's no market risk in that return, unlike most other places you could put a lump sum.
๐ Refinancing to a better rate
Loyalty rarely pays with mortgages, lenders often offer sharper rates to new customers than they do to existing ones. Periodically checking your rate against what's currently available, and being willing to ask your lender to match it or refinance elsewhere, is a legitimate, low-effort way to reduce the total interest paid over the life of the loan. Refinancing is also a natural moment to reconsider whether fixed, variable or split still suits your situation.
โ๏ธ The trade-off with investing instead
Extra mortgage repayments are a guaranteed return equal to your interest rate. Investing instead offers a potentially higher but genuinely uncertain long-term return. Neither choice is objectively correct, it depends on your own interest rate, timeframe, and comfort with the two different kinds of risk involved. Many people do both, some extra repayments alongside consistent investing, rather than treating it as all-or-nothing.
๐ What Is Compound Interest?
The same mechanism that works against you on a mortgage works for you when investing.
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โ Frequently asked questions
Do small extra repayments actually make a difference?
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Yes, more than most people expect. Extra repayments reduce your principal early, which means less of every future repayment goes to interest, an effect that compounds over the life of the loan.
What's the real difference between an offset account and redraw?
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An offset account is a separate transaction account linked to your loan, its balance reduces the interest charged without technically being a loan repayment. A redraw facility lets you withdraw extra repayments you've already made. Offset is usually more flexible day-to-day, redraw can have withdrawal limits or fees depending on the lender.
Should I pay off my mortgage faster or invest the extra money?
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It depends on your mortgage rate versus your expected investment return, and how much you value the certainty of a guaranteed return (your interest rate) versus the higher but less certain long-term average return of investing. Neither answer is universally correct.
Are there penalties for paying off a mortgage early?
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For variable rate loans, rarely, extra repayments are usually welcomed. Fixed rate loans often cap how much extra you can repay each year before a break fee applies, worth checking your specific loan terms.
๐ Recommended reading

The Barefoot Investor
Scott Pape
Australia's best-selling money book ever. A simple system for accounts, budgeting, debt and a real emergency fund in one.

Mindful Money
Canna Campbell
A calmer, values-first approach to investing and financial wellbeing from a certified financial planner.
Some links above are affiliate links. If you buy through them, Snowball Invest may earn a small commission at no extra cost to you. We only recommend books we'd suggest anyway.
Sources
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Timothy Hirou Gaschereau
Founder of Snowball Invest, not a financial adviser.
I write about what I'm learning myself, because nobody ever taught us how to take control of our own money. It's a skill, not a mystery, and it's never too late to learn it. The best day to start was yesterday, the second best is today.
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