Everything You Need to Know About Variable Rate Investment Loans

Variable rate investment loans let you make extra repayments without penalty and keep your borrowing flexible.

That matters because the tax treatment of investment property borrowings changed from July this year, and builders holding pre-existing stock or planning to add new builds to a portfolio need loan structures that can adapt. A variable rate loan with an offset or redraw facility gives you control over cash flow, lets you park business income where it reduces interest costs, and keeps your options open if you need to pivot.

Why Variable Rate Beats Fixed for Most Builder Investors

Variable rate loans allow unlimited extra repayments and full access to funds via redraw or offset without penalty. Most fixed rate products lock you in for one to five years and charge break costs if you need to access capital, refinance, or sell the property before the term ends. If you pull a $40,000 lump from a fixed loan to cover site costs or settle on another investment, you can wear break fees that wipe out any rate saving you were banking on.

We regularly see builders using offset accounts to manage cash flow between projects. When a stage payment lands or you invoice for a completed job, that money sits in the offset and cuts the interest you pay on the investment loan until you need it back on site. That's harder to replicate with a fixed product.

How Extra Repayments Cut Your Interest Bill and Build Equity Faster

Every dollar you put above the minimum repayment reduces the principal balance immediately and cuts the interest charged the next day. On a $500,000 variable rate investment loan at current rates, an extra $1,000 per month can cut your total interest cost by tens of thousands over the life of the loan and trim years off the term.

Consider a builder who keeps a rental property on principal and interest repayments and directs surplus cash into a linked offset account. The offset balance reduces the interest calculated each day, but the funds stay accessible. When the next job needs materials or when you want to release equity for another purchase, the money is there without submitting a redraw request or triggering a loan variation.

Interest Only with Offset: Maximising Deductions Without Locking Up Capital

Interest only repayments keep your monthly outgoing lower and maximise the tax deduction on the interest component, but they don't reduce the loan balance. Pairing interest only with a 100 per cent offset account gives you the option to park extra cash where it reduces interest without formally paying down the loan.

Under the new negative gearing quarantine rules that apply from July next year, rental losses on residential properties acquired after May this year can only be offset against other residential rental income or carried forward. Properties acquired before that date continue under the old rules. If you hold existing stock that still qualifies for full negative gearing, keeping those loans interest only may make sense because the deduction offsets your wage or business income. If you're buying new builds that retain access to full negative gearing, the same logic applies. But if you're holding a property acquired after the cut-off that doesn't meet the new build exemption, paying down the loan via offset or redraw keeps your options open without giving up access to the capital.

We regularly see this structure with builders who want to retain liquidity for their trade business while still holding investment property. The offset balance grows when work is steady, interest costs drop, and the funds remain available when cashflow tightens or the next opportunity appears.

Redraw Versus Offset: What Actually Works When You Need the Money Back

Redraw facilities let you pull back extra repayments you've made above the minimum, but the funds technically belong to the lender until you request them. Some lenders process redraw requests within a day, others take longer, and a handful reserve the right to decline or limit access if your circumstances change. Offset accounts are separate transaction accounts linked to your loan. The balance offsets the interest calculation, but the money is yours and accessible any time via transfer, card, or cheque.

For builders managing job payments, supplier invoices, and settlement timing across multiple projects, offset accounts remove the friction. You don't wait for approval or deal with redraw limits. The trade-off is that offset accounts usually come with a slightly higher interest rate or an annual package fee. That cost is typically worth it if you move money in and out regularly or if you want certainty that funds won't be frozen during a lender review.

Using Equity Release and Extra Repayments to Fund Your Next Purchase

Paying down your investment loan increases your equity position and your borrowing capacity for the next property. Lenders calculate usable equity as 80 per cent of the property value minus what you owe, assuming you want to stay under the LMI threshold. If your rental property is worth $600,000 and you owe $400,000, your usable equity is roughly $80,000. If you've paid that loan down to $350,000 through extra repayments, your usable equity climbs to $130,000.

Most variable rate loans let you apply for a top-up or equity release without refinancing the whole loan. You keep your existing rate and terms, the lender revalues the property, and the additional funds settle as a separate split or sub-account. That structure is useful if you want to keep the investment loan separate from the new borrowing for tax and accounting purposes. Interest on money borrowed to acquire or hold an income-producing asset is deductible, but interest on money used for private purposes is not, regardless of what secures the loan. Keeping each purpose in its own split makes record-keeping cleaner.

Variable Rate Discounts and How Your Loan Amount Affects Pricing

Lenders price investment loans based on loan size, LVR, repayment type, and whether you're self-employed. A builder borrowing $400,000 at 75 per cent LVR on a variable rate principal and interest investment loan will usually see a wider discount than someone borrowing $250,000 at 85 per cent LVR on interest only. The bigger the loan and the lower the risk, the sharper the rate.

Rate discounts are not locked in forever. Most lenders reserve the right to change the discount on your loan if their credit policy or risk settings shift, though they must notify you in writing. That's another reason to review your loan every couple of years. If your equity position has improved or your borrowing has grown, you may qualify for a deeper discount with your current lender or a lower rate elsewhere. Refinancing an investment loan to a better rate is common, and the interest saving usually exceeds the application and settlement costs within the first year.

What the New Tax Rules Mean for Builders Holding or Buying Rental Property

From July next year, rental losses on residential property acquired after May this year are quarantined unless the property meets the new build exemption. Losses can only offset other residential rental income or be carried forward. Properties you already hold, or were under contract for before the cut-off, continue under existing rules. Eligible new builds retain access to full negative gearing, meaning losses can still offset wage or business income.

For builders, that creates a clear incentive to acquire new builds or increase dwelling numbers through subdivision or development. A knock-down rebuild that replaces one dwelling with one dwelling does not qualify. A project that replaces one dwelling with two does. The rules are detailed, and the ATO is still releasing guidance, so get advice before you settle.

The change doesn't alter how loan interest is calculated or what repayment structure suits your position, but it does affect the after-tax cost of holding property. If you were relying on rental losses to reduce your taxable income from building work, that strategy only continues if you buy qualifying new builds or hold onto pre-existing stock. If you're holding a post-cutoff property that doesn't meet the exemption, paying down the loan faster via extra repayments may make more sense than maximising interest deductions that can't offset your other income anyway.

When to Lock Part of Your Loan and Keep Part Variable

Some builders split their investment loan into a fixed portion and a variable portion. The fixed split gives you rate certainty on part of the debt, and the variable split gives you flexibility to make extra repayments or access funds. A 50/50 or 60/40 split is common, though the right mix depends on your cash flow, risk tolerance, and how likely you are to need capital in the next few years.

Splitting works when you want some protection against rate rises but don't want to lose the ability to pay down debt or access equity. The variable portion can carry an offset account, and you can direct extra repayments there without penalty. The fixed portion sits unchanged until the term expires, at which point you can refinance, roll onto a variable rate, or fix again depending on where rates sit at the time.

Call one of our team or book an appointment at a time that works for you. We'll walk through your current setup, your plans for the next property, and the loan structure that keeps your options open without costing you more than it should.

Frequently Asked Questions