What Not to Do When Refinancing Investment Property

Most investors refinance when they feel something is wrong with their current loan. That reactive approach leaves money on the table and locks in decisions that limit what you can do with your portfolio for years.

Waiting Until Your Fixed Rate Expires to Review Your Loan

Your fixed rate expiry date is not the start of the refinancing timeline. Lenders need 6 to 8 weeks to assess, value, and settle a refinance application, and if you wait until the fixed period ends, you'll roll onto a variable rate that's often 1% to 1.5% higher than what you could have accessed with preparation. Consider an investor holding a property with a loan balance of $450,000. If they roll onto a revert rate instead of locking in a new structure ahead of time, they could pay an extra $6,000 to $8,000 in interest before the refinance settles. That's cash flow lost, not deferred. We regularly work with investors who assume their lender will notify them in time, but most lenders send a single letter 30 days out, which is not enough time to compare options, access equity, or restructure. If your fixed rate period is ending, start the conversation at least 90 days before expiry.

Refinancing Without Checking What Equity You Can Access

A property valuation during refinancing is not just a compliance step. It determines how much equity you can release, and if you don't know that figure before you apply, you're making decisions in the dark. Lenders will typically allow you to borrow up to 80% of the property's current value without paying lender's mortgage insurance. If your property has increased in value since purchase, that 80% threshold might now unlock $50,000, $100,000, or more in usable equity. In our experience, investors who refinance purely to reduce their interest rate often miss the chance to access equity for their next purchase because they didn't structure the loan to make that equity available. A loan review before refinancing should include a current valuation estimate and a discussion about whether you want to access equity now, hold it for later, or leave it untouched. Once the refinance settles, going back to pull equity out means another application, another valuation, and another round of costs.

Consolidating Investment Debt Into Your Home Loan

Debt against an investment property is tax-deductible. Debt against your home is not. When you consolidate investment loan debt into your owner-occupied mortgage to reduce your overall interest rate or simplify your repayments, you lose the ability to claim that interest as a deduction. Consider an investor with a $300,000 home loan and a $200,000 investment loan. If they refinance both into a single $500,000 loan against their home, the interest on the full $500,000 is no longer deductible, even though $200,000 of that debt was originally used to purchase an income-producing asset. The Australian Taxation Office is clear on this. The deductibility of interest depends on the purpose of the borrowing, not the asset it's secured against. If you want to streamline your loans, you can hold multiple splits under one lender or use an offset account linked to your investment loan, but you cannot merge the debt without changing its tax treatment. This is one of the most common mistakes we see, and it's permanent once it's done.

Choosing a Loan Based Only on the Interest Rate

A lower interest rate saves you money, but it doesn't always improve your position. Some lenders offer headline rates that don't include offset accounts, require you to lock in a fixed term with high break costs, or restrict your ability to make extra repayments. Others cap the number of investment loans they'll hold for a single borrower, which means if you take that rate now, you might not be able to borrow with them again when you're ready to expand your portfolio. An investor refinancing to access a lower rate might save $2,000 per year in interest, but if that loan doesn't allow them to access equity for their next purchase, they've traded short-term savings for long-term flexibility. When comparing refinance options, compare loan features, lender serviceability policies, and portability across your entire investment strategy. A loan that costs slightly more now but supports your next two purchases is often the smarter choice.

Refinancing Without Understanding How It Affects Your Borrowing Capacity

Every time you refinance, lenders reassess your income, expenses, and existing commitments. If you've taken on new debt, increased your living costs, or reduced your income since your last application, you might not qualify for the same loan amount you currently hold. This becomes critical when you're refinancing an investment property and planning to borrow again in the next 12 to 24 months. Lenders calculate borrowing capacity using rental income, but they only count 80% of that income and add a buffer to your interest rate when running serviceability tests. If you refinance without structuring your loans to maximise serviceability, you could reduce what you can borrow next time, even if your portfolio has grown in value. In a scenario where an investor holds three properties and wants to buy a fourth, refinancing one loan to a structure that increases repayments or reduces offset balances could lower their serviceability enough to block that next purchase. A loan review before refinancing should include a serviceability calculation based on your current position and your next intended move.

Ignoring the Refinance Application Process and Timeline

Refinancing is not automatic. Lenders will request payslips, tax returns, rental statements, and bank statements, and if your financial position has changed since your last application, you'll need to explain those changes. Investors with multiple properties often assume their existing lender will fast-track a refinance, but even internal refinances require full reassessment. The refinance process typically takes 4 to 6 weeks from application to settlement if your documentation is ready and the valuation comes back at or above the required level. If the valuation falls short, or if the lender requests additional information, that timeline extends. We regularly see investors apply to refinance, then lose the rate they were quoted because they didn't submit documents on time or because the lender's credit policy changed while the application was being assessed. Rates are not locked until formal approval, and even then, they're only held for a set period. If you're refinancing to lock in a rate, treat the application as time-sensitive and prioritise it accordingly.

Not Comparing What You Already Have to What's Available

Your current loan might already be competitive. If your lender has reduced rates since you last reviewed your loan, or if your loan-to-value ratio has dropped due to property growth or repayments, you might be able to negotiate a lower rate without refinancing. Some lenders will match or beat external offers to retain you, and if your loan structure already suits your strategy, staying put saves you time, valuation fees, and discharge costs. A loan health check should happen at least once a year, and it should compare your current rate, features, and flexibility against what's available in the market. If the gap is less than 0.3% and your current loan supports your next move, refinancing might not be worth the effort. If the gap is larger, or if your current loan restricts equity access or limits your portfolio growth, refinancing becomes a priority. The decision should be based on the full picture, not just the advertised rate on a comparison website.

Refinancing an investment property is a portfolio decision, not a transaction. If you're holding multiple properties, planning to buy again, or relying on rental income to service debt, the loan you choose now will either expand or constrain what you can do next. Call one of our team or book an appointment at a time that works for you.

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