Simple hacks to cut thousands off your investment loan

Your investment loan is probably costing you more than it should.

Most electricians set up their rental property loan once and leave it alone. That works if you locked in the right structure from the start, but if you borrowed the same way you would for a home you live in, you're likely paying more tax and building equity slower than you need to. Investment loan optimisation means changing how your loan is structured so it works harder for you, not just sitting there charging interest.

Separate your investment debt from everything else

Investment loan interest is only deductible if the borrowed money was used to buy or hold the rental property. Mix that debt with personal expenses and the ATO will disallow part of your claim. Keep the investment loan completely separate from your owner-occupied mortgage, car loan, or any other borrowing. If you refinanced your home and pulled out equity to fund the rental deposit, that portion of the debt should sit in its own split with its own account and offset arrangement. The interest on money used for the investment is claimable. The interest on money used for anything else is not.

Consider an electrician who refinanced to release equity and used part of it for a deposit on a unit and part of it to buy a new ute. If the whole amount sits in one loan account, only a portion of the interest is deductible, and proving that portion to the ATO requires meticulous record-keeping. Split the borrowing at the point of drawdown and the paperwork does itself.

Interest-only repayments to maximise tax deductions

Interest-only repayments mean you pay only the interest each month and the loan balance stays the same. For an investment property, that keeps your deductible interest as high as possible for as long as possible. You are not paying down non-deductible debt faster while your deductible debt sits untouched. Most investment loans for tradies allow interest-only periods of up to five years, after which the loan reverts to principal and interest unless you apply to extend.

There is no requirement to pay down investment debt early if doing so reduces your tax position. Put extra cash flow into an offset account linked to your non-deductible home loan instead, or into super, or back into the business. Paying down the investment loan faster just converts deductible debt into equity you cannot claim.

Use offset accounts only where they make sense

An offset account reduces the interest you are charged, which is helpful for a home loan but counterproductive for an investment loan where you want to maximise your deduction. If your investment loan has an offset attached, do not park savings in it. That account should sit at zero unless you are holding funds temporarily for a specific property expense like an upcoming insurance renewal or body corporate levy.

Offset accounts do have a role in investment lending structures, but typically only when the loan also funds non-deductible purposes or when you are planning to convert the property to owner-occupied use in the near future. Otherwise, leave the offset empty and keep your deduction intact.

Refinance to access better investor interest rates

Lender pricing for investment property loans varies widely, and the gap between a standard variable investor rate and a discounted one can sit anywhere from 0.30 per cent to over 1.00 per cent depending on your loan size, deposit and employment type. Investment loan refinancing lets you move to a lender offering lower rates or waived fees without selling the property.

You can also refinance to restructure. If your current loan is set up as principal and interest and you want interest-only, or if your investment and personal debts are mixed in one facility, refinancing gives you a clean slate to separate everything properly. Refinancing costs including discharge fees and application fees are generally claimable as borrowing expenses, though valuation and legal costs related to the property itself are added to the cost base for capital gains purposes rather than claimed immediately.

Claim every dollar you are entitled to

Interest is not the only cost you can claim. Loan establishment fees, ongoing account-keeping fees, lender valuation fees, mortgage broker fees, and the cost of finance for tradies advice related to the investment loan are all deductible in the year they are incurred or over five years if they exceed a certain threshold. Lenders Mortgage Insurance paid on the investment loan is also deductible, either in full in the first year or over five years, depending on the amount and your approach.

Keep every invoice and statement related to the loan in a separate folder. Your accountant will need them at tax time, and if the ATO ever queries your return, a complete paper trail is the difference between a smooth review and a disallowed deduction.

Know what changed and what did not

From the 2027-28 income year, losses on established investment properties acquired after 12 May 2026 can only be offset against other residential property income, not against wages. Properties bought before that date, including those under contract before 7:30pm AEST on 12 May 2026, remain fully negatively geared. Eligible new builds purchased after that date are also exempt and can continue to be negatively geared in the traditional way.

If you already own a rental, nothing changes for you until you sell. If you are buying your first investment property now and it is an established dwelling, the new rules apply from 1 July 2027. Losses you cannot use in one year carry forward and can be used against future rental income or capital gains on residential property when you sell. Interest is still deductible, the timing of when you can use the deduction has just shifted for some buyers.

Structure the loan before settlement, not after

Once the loan is drawn and the funds are spent, the tax treatment is locked in. You cannot retrospectively split a loan or reclassify how borrowed funds were used. If you are about to settle on a rental property, make sure the loan structure is right before you sign anything. That means separate splits for each purpose, interest-only if that suits your strategy, offset accounts only where they add value, and every dollar of borrowing documented with a clear purpose.

Call one of our team or book an appointment at a time that works for you. We will review your current setup or help structure a new investment loan so it is doing what it should be from day one, not costing you tax deductions or cash flow because it was set up wrong from the start.

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