When to Review Your Investment Loan Cash Flow

Investment property cash flow is the difference between rental income and all holding costs, including loan repayments, body corporate fees, property management, insurance, and rates. When this number is negative, you fund the shortfall from your own income. When it is positive, the property pays for itself.

Many investors in Kew hold properties for decades, not years. The ability to hold through multiple rate cycles depends on having a cash flow structure that can absorb repayment increases without forcing a sale. Choosing the right loan structure at the start reduces the risk of being caught out later.

Why Cash Flow Matters More Than Purchase Price

Purchase price determines how much you borrow. Cash flow determines whether you can keep the property.

Consider an investor who purchases an established apartment in Kew with a 20 per cent deposit. Rental income is $2,600 per month. Body corporate fees are $1,200 per quarter, council and water rates are $2,000 annually, insurance is $800 per year, and property management takes 7 per cent of rent. At a variable rate, the principal and interest repayment on the loan is $3,400 per month. The property is negatively geared by approximately $1,300 per month, or $15,600 annually. That shortfall must come from the investor's after-tax income.

If variable rates increase by one percentage point, the monthly repayment rises to approximately $3,700. The shortfall increases to $1,600 per month, or $19,200 annually. That is an additional $3,600 per year that must be funded from the investor's salary. If their marginal tax rate is 37 per cent, they need to earn an extra $5,700 before tax to cover the increase. This is where investors who have not structured their loan with cash flow in mind start to feel pressure.

Interest Only Versus Principal and Interest for Cash Flow Control

An interest only loan reduces monthly repayments by removing the principal component. The loan balance does not reduce, but the holding cost is lower.

Using the same Kew apartment example, switching to interest only reduces the monthly repayment from $3,400 to approximately $2,500. The property is now negatively geared by around $400 per month, or $4,800 per year. That is $10,800 less that the investor needs to fund annually compared to principal and interest. Over a five-year interest only period, the investor retains approximately $54,000 in after-tax income that would otherwise have been paid into the loan.

This structure is not about avoiding principal repayment permanently. It is about controlling when that repayment occurs. Investors who expect income growth, plan to pay down other debt first, or want to hold multiple properties often use interest only periods to manage cash flow across their portfolio. When the interest only period ends, the loan typically reverts to principal and interest unless the investor refinances or requests an extension.

Fixed Versus Variable Rates in a Rising Rate Environment

Fixed rates lock in a repayment amount for a set period, typically one to five years. Variable rates move with the market and allow unlimited extra repayments and redraw.

In our experience, investors who fix a portion of their loan do so to protect cash flow, not to predict rate movements. A split loan structure allows the investor to fix part of the loan at a known repayment and leave the rest variable for flexibility. This is particularly relevant for Kew investors holding multiple properties, where one rate increase can affect several loans simultaneously.

A split structure also allows the investor to stagger fixed rate expiry dates across their portfolio. If all fixed rates expire at the same time and variable rates are higher, the cash flow impact is immediate and concentrated. Staggering expiry dates over different years spreads the exposure. This requires planning at the time each loan is written, not when the fixed period is about to end. Investors looking to refinance an existing investment loan should review their current expiry dates before committing to a new fixed term.

How Kew Investors Use Offset Accounts to Manage Holding Costs

An offset account is a transaction account linked to the loan. The balance in the offset reduces the amount of interest charged on the loan without physically paying down the principal. Offset accounts are typically only available on variable rate loans or the variable portion of a split loan.

For investors in Kew who receive bonuses, rental income from other properties, or irregular distributions, an offset account allows those funds to reduce interest immediately while remaining accessible. Unlike a redraw facility, funds in an offset account are not treated as loan repayments and do not affect the deductibility of interest for tax purposes. This distinction matters when rental income is deposited into the offset, as it remains separate from the loan structure and can be withdrawn without creating a non-deductible component.

An investor holding multiple properties might use a single offset account linked to the loan with the highest balance or highest rate, as the interest saved is proportional to both. If the offset balance is $50,000 and the variable rate on the linked loan is 6 per cent, the investor saves $3,000 in interest annually. That saving goes directly to improving cash flow, as the required repayment amount does not change. The loan balance remains the same, but the interest charged is lower.

When to Review Your Investment Loan Structure

Reviewing loan structure is not something that only happens at refinancing or when rates change. It should occur whenever the investor's cash flow position or portfolio strategy changes.

Investors who have paid down non-deductible debt, such as an owner-occupied home loan, may choose to switch their investment loan from interest only back to principal and interest. This accelerates equity growth in the investment property without affecting overall cash flow, as the funds previously directed to the home loan are now available.

Investors approaching the end of an interest only period should review their options at least six months before expiry. Lenders require income and borrowing capacity to be reassessed before extending or refinancing. If the investor's circumstances have changed, such as a reduction in income or an increase in other debt, leaving the review until the final month reduces available options. A loan health check at the midpoint of the interest only term provides enough time to adjust the structure if required.

Kew investors holding properties purchased before 12 May 2026 are not affected by the proposed negative gearing changes as long as they retain ownership. Those considering a purchase after that date should account for the fact that negative gearing will only apply to new builds from 1 July 2027. For established properties acquired after 12 May 2026, losses will be quarantined and only deductible against rental income or capital gains. This changes the cash flow impact of holding an established investment property, as the tax offset is deferred rather than claimed annually. Investors should seek advice from a licensed tax specialist before structuring a purchase.

Debt-to-Income Limits and What They Mean for Portfolio Growth

From 1 February 2026, authorised deposit-taking institutions are limited in the proportion of new lending they can issue at a debt-to-income ratio of six times income or more. This limit is measured separately for owner-occupier and investor lending.

For investors in Kew, this means that lenders are now more sensitive to total debt relative to income, even if serviceability at the assessed rate is met. An investor with an income of $150,000 and total debt of $900,000 sits at the six times threshold. If they wish to borrow additional funds for another property, the lender may decline or reduce the loan amount to remain within their quarterly lending cap, even if the investor can service the repayments. This makes cash flow management more important, as holding existing debt at a level that allows for future borrowing depends on income retention and loan structure. Non-bank lenders are not subject to the debt-to-income limit and may offer additional flexibility for portfolio growth, though rates and fees vary.

Call one of our team or book an appointment at a time that works for you to review your current investment loan structure and identify whether your cash flow position can be improved before your next rate review or fixed period expiry.

Frequently Asked Questions