How to Make Your Tenants Pay Your Entire Mortgage (Legally)

"You'll never find a house in Melbourne where the rent covers the mortgage."

I hear this from accountants, mortgage brokers, and property 'experts' at least once a month. And every time, I pull out my phone, open the portfolio dashboard, and show them a list of properties where the rent doesn't just cover the mortgage — it covers everything. Principal. Interest. Rates. Insurance. Management fees. And still leaves four to five grand a year in the owner's pocket.

It's not magic. It's maths. Specifically, it's the maths of buying the right property, at the right price, and then doing one or two things to it that most investors never consider.

The formula: 6% gross yield or don't bother

In Melbourne's current interest rate environment, a property needs to generate approximately 6% gross rental yield to cover all holding costs on an 80% loan-to-value ratio at around 6% interest 1.

The market average for Melbourne houses is about 2.5% to 3% 2. So right off the bat, you need to roughly double what the average investor achieves. That sounds impossible until you understand the three levers.

Lever 1: Buy below market. We source approximately 30% of our purchases off-market — properties that never hit Domain or realestate.com.au 3. Off-market purchases typically settle 5% to 10% below what the same property would achieve at auction. On a $700,000 house, that's $35,000 to $70,000 saved at purchase.

Lever 2: Cosmetic renovation to lift rent. A $13,000 spend on paint, flooring, and fixtures can lift weekly rent from $420 to $580 — a 38% increase 4. That moves your yield from 3.1% to 4.3% on the same property.

Lever 3: Add a second income stream. This is the multiplier. A 30-square-metre granny flat costing $110,000 plus GST generates $370 to $390 per week in additional rent 5. Combined with the main dwelling, total rent hits $950 per week on a property that cost $700,000 plus $110,000 in construction. Gross yield: 6.1%.

What does a real positive cash flow property look like?

Let me walk you through an actual deal from last quarter.

Purchase price: $710,000 (off-market, unconditional offer) Land size: 635 square metres with 3.4m side access Existing rent: $430/week (gross yield: 3.1%)

Step 1 — Cosmetic renovation: $14,500

• Full interior repaint: $6,200
• SPC flooring throughout: $5,800
• New light fittings and kitchen handles: $1,200
• Professional clean and minor landscaping: $1,300

Result: New rent $590/week (gross yield: 4.3%)

Step 2 — Granny flat construction: $115,000 plus GST

• 30sqm studio, one bed, one bath, kitchenette
• Construction time: 3 months after paperwork
• Sub-meter reader for electricity: $800

Result: Granny flat rent $380/week

Total weekly rent: $970 Total investment: $710,000 + $14,500 + $115,000 = $839,500 Gross yield on total investment: 6.0% Annual holding costs (IO at 6%, rates, insurance, PM fees): approximately $46,200 Annual rent: $50,440 Annual surplus: +$4,240

"We don't buy properties that generate positive cash flow. We buy properties that CAN generate positive cash flow — then we make it happen. The difference is everything," says Joey Don.

That $4,240 surplus isn't going to make anyone rich. But it means the property is self-funding. No money coming out of the owner's salary. No financial stress. Just a quietly compounding asset that pays for itself while the land appreciates.

The three mistakes that kill positive cash flow

Mistake 1: Paying too much. Every $10,000 you overpay at purchase reduces your yield by about 0.08%. Overpay by $50,000 and you've knocked nearly half a percent off your return — the difference between positive and negative cash flow 6.

Mistake 2: Over-capitalising on the renovation. A $6,200 paint job lifts rent. A $25,000 kitchen renovation in a $700,000 house? The tenants don't care about stone benchtops in Cranbourne. They care about clean, functional, and modern-looking. Every dollar of renovation should return at least $1.50 in annual rent. If it doesn't, don't do it.

Mistake 3: Wrong block for a granny flat. You need 550-plus square metres and a side driveway wider than 3 metres for crane access 7. I've seen investors buy properties specifically planning to add a granny flat, only to discover the driveway is 2.7 metres wide. That 30-centimetre shortfall just killed their entire cash flow strategy.

Check the block dimensions before you make an offer. Not after.

Is this actually passive income?

Let's be honest. No.

During the acquisition and renovation phase — roughly three to six months — you're actively involved. Negotiating the purchase, coordinating the renovation, managing the granny flat build, finding tenants for both dwellings.

After that? A competent property manager handles the day-to-day for 5% to 7% of gross rent. You review the quarterly statement, approve any maintenance over $500, and sign the annual lease renewal.

It's about as passive as owning a share portfolio — you're not doing the work, but you need to keep an eye on it.

The difference is that your share portfolio doesn't pay you $970 a week in rent while simultaneously appreciating in land value. Property does. And when the rent covers the mortgage, the machine runs itself.