Should You Keep Your Rose Bay Home As An Investment When Upgrading?

Upgrading in Rose Bay and wondering if you should keep your current place as an investment? The decision comes down to five numbers: how much equity you can safely use, what deposit you need for the new home, what repayments you can truly afford under a 3% buffer, what rent you’ll realistically receive, and how much cash buffer you’ll hold after both loans settle. Get those right, and you can usually decide within a week whether “keep and rent” is smart or too risky.

This guide is written for busy Eastern Suburbs families who want a clear, decision‑grade framework they can actually use this week – not a theoretical spreadsheet they’ll never open again.

Start your Rose Bay upgrade plan with clear numbers, not guesses.

1. Start With The Rose Bay Reality Check

1.1 Why this decision is harder in Rose Bay

Rose Bay upgrades are tricky because:

• Prices and loan sizes are high, so small mistakes are magnified.
• APRA’s 3% serviceability buffer means every extra dollar of debt is stress‑tested at much higher rates.
• Many households are asset‑rich but feel cash‑poor once kids, school fees and lifestyle costs bite.

From our work with similar prestige suburbs, a sensible guidepost is keeping total property debt around 6–7× gross household income when you’re juggling a family home and at least one investment (see also /insights/sequencing-upgrades-renovations-investments-rose-bay).

1.2 The five‑number framework for “keep or sell”

Across Rose Bay, Dover Heights and Mascot, a repeatable pattern has emerged: if you check five numbers carefully, the answer usually becomes obvious.

1. Usable equity in your current home.
2. Deposit gap for the new place (after stamps and costs).
3. Safe repayment level once both properties are on the books.
4. Realistic net rent on the old home.
5. Post‑move buffer in cash/offset.

If three or more of these are tight, keeping the old home as an investment is usually too aggressive.

1.3 A quick example – what “borderline” looks like

Assume:

• Household income: $450,000.
• Current Rose Bay home value: $3.0m, loan $1.2m.
• New family home: $4.0m.

Indicatively, 6–7× income is $2.7m–$3.15m of total property debt. If keeping the old home and buying the new one pushes you to $3.5m or more in total loans, you’re beyond conservative territory and need everything else (rent, buffers, job security) to be very strong.

2. Step 1 – Calculate Usable Equity In Your Current Home

2.1 What is “usable” equity?

Equity is the gap between your home’s value and the loan. Usable equity is how much a lender will let you actually access, typically up to 80% of value without LMI, sometimes up to 90–95% with LMI and specific policies.

If your Rose Bay home is worth $3.0m with a $1.2m loan:

• 80% of $3.0m = $2.4m
• Usable equity ≈ $2.4m − $1.2m = $1.2m

Going above 80% can attract LMI and increase risk, so most upgraders cap their usable equity around that mark unless there’s a strong reason not to.

2.2 How much should you actually use?

For two‑property owners, a practical rule is to:

• Keep personal cash in offset, and
• Use separate investment loan splits on the home for deposits and costs.

This preserves tax deductibility and exit options (see /insights/structuring-investment-loans-when-wealth-in-family-home). In practice, you rarely want to strip out every cent of usable equity.

Many Rose Bay households target:

• 70–80% LVR on the existing home post‑equity release; and
• A clear plan to keep the home loan split (for the new home) separate from the investment split (for the deposit on the old home becoming a rental).

2.3 Worked equity example

Using the same $3.0m home, $1.2m loan:

• Target post‑release LVR: 80% = $2.4m total lending cap.
• Current loan: $1.2m.
• Maximum additional lending: $1.2m.

You might split this as:

• $600k: equity release for new home deposit and stamps (non‑deductible, home purpose).
• $400k: equity release for future investments or buffers.
• $200k: margin of safety not touched.

How you slice this matters for tax and future flexibility – not just for getting an approval.

Clean, purpose-based loan splits keep tax and future moves simpler.

3. Step 2 – Work Out The Deposit Gap For The New Home

3.1 What does your next Rose Bay home actually cost?

Add up all acquisition costs for the upgrade:

• Purchase price (e.g. $4.0m).
• Stamp duty (roughly 4–5.5% in NSW – budget ~$180k–$220k on $4.0m).
• Legals, building/pest, moving, minor cosmetic works (often $20k–$50k+).

On a $4.0m purchase, your “all in” cost might be around $4.25m.

3.2 Comparing deposit options

You then decide how much deposit you want to put down from:

• Existing savings/offset.
• Equity release on the current home.

Here’s how different choices change your risk profile.

In a prestige suburb, leaning towards 80–85% LVR on the new home often balances speed with resilience.

3.3 Watch for mixed‑purpose traps

If you blend “new home” borrowings and “investment deposit” borrowings into one messy loan, you can:

• Complicate tax deductibility of interest.
• Make later refinancing and property sales harder.

Keeping purpose‑based splits – one primary loan per property, and internal splits as needed – is usually safer (see /insights/consolidate-personal-investment-debts-eastern-suburbs-home-loan).