Reference
Building a property portfolio, one purchase at a time
Equity, serviceability, cashflow versus growth, structuring, and why the second purchase is harder than the first even when you have more money.
15 min read
A portfolio is not a collection of purchases. It is a sequence, where each one changes what the next one is allowed to be. Understanding the constraint that binds at each stage is most of what separates three properties from one.
The constraint moves, and most people miss it
For a first purchase, the binding constraint is almost always deposit. You have income; you do not yet have the lump sum. Everything is about saving, and about schemes that reduce what you need.
From the second purchase onward, the binding constraint is usually serviceability. You now have equity you can draw on, but a lender assessing your capacity applies a buffer to your existing debt, counts only part of the rent as income, and adds notional living expenses. It is entirely normal to have more equity and less borrowing power than you had a year earlier.
Using equity without over-reaching
Equity is the difference between what a property is worth and what you owe on it. Usable equity is smaller: lenders typically let you borrow against up to eighty per cent of value, less the existing debt.
- 1Get the property revalued, not estimated
Lender valuations are frequently more conservative than online estimates or agent appraisals. Plan on the conservative figure and treat anything better as a bonus.
- 2Work out usable equity, not equity
Roughly 80% of value minus the current loan balance. This is the number a lender will actually release.
- 3Decide how to access it
A separate split or a line of credit keeps the borrowing for the new property identifiable, which matters for deductibility and for your own clarity.
- 4Leave a buffer you can survive on
Interest rate movements, a vacancy, a special levy and a broken hot water system can arrive in the same quarter. A portfolio that only works fully tenanted at current rates is not a portfolio, it is a bet.
Growth and cashflow are a genuine trade-off
Higher-yielding properties tend to be in areas with weaker capital growth, and the reverse. Both strategies work; the failure mode is pretending you can have both and building a plan that needs both.
- Growth-focused holdings build the equity that funds the next deposit, but consume serviceability while you hold them
- Cashflow-focused holdings preserve serviceability but accumulate equity slowly
- Most durable portfolios mix the two deliberately rather than by accident
- A negatively geared property is a bet on growth funded by your salary - which is fine, provided the salary is reliable
The costs that only appear at scale
- Land tax, assessed on aggregate holdings within each state above a threshold - the reason many investors buy across state lines
- Higher stamp duty brackets, and in some places surcharges for additional or foreign-held property
- Vacancy, which averages out across a portfolio but arrives unevenly
- Property management fees, typically 5-9% of rent plus letting fees
- Maintenance and capital replacement - roofs, hot water, ovens, carpets - which is predictable in aggregate and never in timing
- Insurance, including landlord cover, which is not the same as building cover
- Accounting and structuring costs, which grow with complexity
Ownership structure, decided before you buy
Personal name, joint names, a trust or a company all have different consequences for tax, land tax thresholds, asset protection and borrowing capacity. Changing structure later usually means a transfer, which usually means paying duty again.
This is the point at which a good accountant is worth more than any article. The purpose of reading about it first is to arrive with questions rather than to decide alone.
Due diligence changes character, not rigour
On a home, a defect is something you live with. On an investment, it is a line item against a yield that was already thin, and it competes with the loan repayment.
- Existing tenancy terms - a lease below market rent transfers to you with the property
- Whether the contract is subject to existing tenancies, and whether the lease is actually attached
- Strata capital works fund health, since a special levy comes straight out of net yield
- Compliance items with statutory deadlines - smoke alarms, pool fencing, minimum standards in some states
- Zoning and permitted use, which decides whether the intended letting is even lawful
- Any clause making you liable for work orders issued after the contract date
The same document problem, multiplied
An investor buying every eighteen months faces the contract-pack problem repeatedly, usually while working, often in a state whose conveyancing conventions differ from the last one. The cost of missing a clause compounds across a portfolio rather than happening once.
TrueBuy reads each pack the same way, returns every finding quoted and paged, and gives you a consistent record across purchases - so the questions you asked on property one are the questions you ask on property four.
Read every contract the same way
Upload the pack for your next purchase. Findings come back quoted and paged, free while we are getting started.
Common questions
Why is the second property harder to buy than the first?
Because serviceability, not deposit, becomes the constraint. Lenders assess your existing loan at a buffered interest rate well above the actual one, and count only part of the rent as income. Your borrowing capacity can fall even as your equity rises.
Should I chase cashflow or capital growth?
They trade off, and the honest answer depends on which constraint binds first. Growth builds the equity that funds the next purchase; cashflow protects the serviceability that lets a lender approve it. Portfolios usually fail on serviceability, not on growth.
Does land tax really change the maths?
Substantially, and it is the cost most often left out of the spreadsheet. It is assessed on your aggregate holdings in a state above a threshold, so property three can trigger a bill that makes properties one and two less profitable than they were.
Is due diligence different for an investment?
The physical and legal checks are the same. What changes is that a defect is now a cashflow event rather than an inconvenience, and lease and tenancy terms become part of what you are buying. A special levy on an investment apartment is paid out of a yield that was already thin.
Where these figures come from
Grants, thresholds and duty rates change. Always check the current rules with the relevant state revenue office or Housing Australia before you rely on a number here.
Information, not financial, tax or legal advice. Confirm with your accountant and conveyancer before acting.