What the Calculator Compares
The calculator runs two parallel projections:
- Buying path: Models upfront costs (deposit, stamp duty, conveyancing), ongoing costs (mortgage repayments, council rates, insurance, maintenance estimated at approximately 1% of property value annually), equity accumulation through principal reduction, and estimated capital growth over the chosen period.
- Renting path: Models rent payments over the same period, including estimated annual rent increases, alongside the projected investment return on the capital that would have been tied up as a deposit and upfront costs.
The result is a net wealth comparison at the end of the chosen period under both scenarios – showing which path leaves you financially better off, and when the break-even year occurs.
The Hidden Costs on Both Sides
A complete rent vs buy comparison includes costs that don’t appear in the headline repayment or rent figure:
Costs renters often undercount:
- Annual rent increases – Perth rental vacancy rates have been extremely low, with rents rising sharply since 2022
- The opportunity cost of not owning – no capital gain accrues, no equity builds
- Moving costs when a lease ends involuntarily
- The loss of the right to modify or personalise the property
Costs buyers often undercount:
- Stamp duty – typically $17,000 – $40,000 on Perth properties above the first home buyer threshold
- Ongoing maintenance and repairs – averaging 1% of property value per year
- Council rates, water rates, strata levies (where applicable)
- Building and contents insurance
- The cost of selling if plans change: agent commission (2.0% – 2.5% in Perth) plus conveyancing
Running the calculator with realistic assumptions about all of these inputs produces a more honest comparison than the simple “rent vs repayment” arithmetic that many buyers and renters use informally.
The Perth Context: What the Numbers Actually Look Like
Perth’s rental market has experienced sustained pressure. Median rents across the city exceeded $650 per week for houses in 2025 – over $33,800 per year. For a household paying $700 per week in rent ($36,400 annually), the cumulative outlay over ten years – before any rent increases – exceeds $364,000, with no equity or asset value to show for it.
Over the same ten years, a buyer who purchased at $650,000 with a $130,000 deposit (20%) at 6.5% interest would have paid approximately $414,000 in total mortgage costs (principal and interest), but would also have reduced the loan balance by approximately $95,000 and – assuming a conservative 4% annual property growth rate – seen the property value rise to approximately $962,000.
The comparison is not simply “what did I spend” – it’s “what is my net financial position.” The calculator makes that distinction explicit.
When Renting Is the Better Answer
The rent vs buy calculation doesn’t always favour buying. Scenarios where renting may produce a better outcome include:
- A short holding period (fewer than three to five years) where stamp duty and selling costs cannot be recovered through capital growth
- A high-growth investment alternative for the deposit capital – if shares or other assets compound faster than property appreciates, renting and investing can outperform buying
- Periods of falling property prices, where buying locks in a loss that renting avoids
- Employment mobility requirements where the flexibility to relocate has genuine financial value
The calculator allows you to adjust the property growth rate assumption, the investment return on the alternative use of capital, and the rent increase rate – so you can stress-test the comparison rather than accepting a single optimistic scenario.
Using the Break-Even Year
The break-even year is the point at which cumulative net wealth under the buying path overtakes cumulative net wealth under the renting path. For most Perth buyers in established suburbs, this break-even typically falls between three and seven years, depending on the deposit size, stamp duty liability, and growth rate assumptions.
Buyers who plan to sell before the break-even year may find renting a financially superior short-term strategy. Buyers with a long-term horizon are typically better off purchasing, particularly once first home buyer duty concessions reduce the upfront cost hurdle.
Key Inputs That Affect the Result Most
| Input | Why It Matters | Conservative Assumption |
| Property growth rate | Drives buyer equity accumulation | 3% – 4% p.a. for Perth established suburbs |
| Investment return on deposit | Determines renter’s alternative wealth path | 6% – 7% (diversified shares) |
| Annual rent increase | Affects renter’s cumulative outlay | 3% p.a. |
| Holding period | Determines whether stamp duty cost is recovered | Minimum 5 years for buying to be clearly ahead |
| Stamp duty | One-off cost that takes years to recover through growth | Varies by price and buyer type |
Connect the Decision to Your Loan
Once the calculator shows that buying makes financial sense for your timeline, the next step is confirming what you can borrow and what the repayments look like. The Borrowing Power Calculator estimates your maximum loan amount, the Loan Calculator shows what the repayments look like, and the Property Buying Cost Calculator totals every upfront cost you’ll need to have ready at settlement.
For Perth households on the borderline of affordability, the First Home Buyer and Low Deposit Home Loan pages explore options that may bring a purchase forward without requiring a full 20% deposit.
Frequently Asked Questions
1. Is buying always better than renting in Australia?
Not always. The answer depends on the holding period, property growth rate, alternative use of capital, and individual financial circumstances. The Rent vs Buy Calculator is designed to show the answer specific to your inputs – not a general rule.
2. How does stamp duty affect the rent vs buy calculation?
Stamp duty is an upfront cost that doesn’t generate equity. It must be recovered through capital growth before buying outperforms renting. The calculator factors this directly into the break-even year calculation.
3. What is rent-vesting?
Rent-vesting is the strategy of continuing to rent where you live while purchasing an investment property in a more affordable area. It allows entry into the property market without sacrificing location, but adds complexity around tax treatment and cash flow. It is worth modelling separately from a principal place of residence purchase.
4. Does the calculator account for capital gains tax?
The buying path assumes a primary place of residence (PPOR), which is exempt from capital gains tax under Australian tax law. Investment properties are not exempt. If you are comparing renting vs buying an investment property, CGT should be factored in.
5. How much deposit do I need to buy in Perth?
A 20% deposit avoids Lenders Mortgage Insurance (LMI). A 5% deposit is possible for eligible first home buyers under the First Home Guarantee, which allows purchase without LMI. The Property Buying Cost Calculator models the full cash requirement including stamp duty for any deposit size.
Make the Decision With Complete Information
Renting and buying are both valid financial strategies depending on your circumstances. Central Lending Solutions helps Perth households run the real numbers – taking into account your deposit, income, buying costs, and long-term goals – and then helps those who are ready to buy find the right loan to make it happen. Call (08) 9201 8570 to talk through your position.