Smart upgrade and invest plan for a professional couple’s practice

A professional couple who own a practice can upgrade their home and grow a property portfolio at the same time, but only with a clear plan for debt limits, buffers and loan structure. The core rule: keep total home and investment repayments around 30–35% of after‑tax income under a 3% interest rate buffer, and hold 6–12 months of stressed living and loan costs in offset, especially with self‑employed income.

Here’s how to build a decision‑grade plan you can act on this week.

A staged approach lets professional couples upgrade and invest without overstretching.

1. Start with one clear, written brief

1.1 Define the couple we’re talking about

Think of a pair of doctors, dentists or lawyers in their late 30s or 40s.

• Combined after‑tax income: $320k–$450k.
• Own a practice or hold equity in a partnership.
• Current home worth ~$2.0m with a $1.1m loan.
• One small investment property or none yet.

The goals are familiar:

1. Upgrade to a $3.0m family home in a better school zone.
2. Keep the current home or buy an additional property as an investment.
3. Avoid putting the practice or kids’ schooling at risk.

If that sounds like you, your first step is a one‑page brief that lists: properties, loans, buffers, time‑based goals and risk rules. That shared page is powerful for aligning accountant, broker and planner (see the approach in /insights/coordinating-accountant-broker-financial-planner-bronte-property-plan).

1.2 Set hard risk rules up front

Before chasing listings, agree on:

• Max stressed repayment ratio: 30–35% of net income at 3% above today’s rates (in line with APRA’s buffer and our internal guidance for professionals).
• Minimum buffer: 6–12 months of total stressed living costs plus all loan repayments in offset, given business risk (reinforcing facts 2, 10, 11 and 20 in the knowledge hub).
• Business protection rule: Never use the last business or personal buffer for a new property. The practice must survive a bad year.

Those rules protect you from the over‑leverage traps discussed in /insights/over-leverage-lessons-recover-property-business-debt.

2. Map today’s position and borrowing power

2.1 Equity and buffer snapshot

Using our example couple:

• Home value: $2.0m
• Home loan: $1.1m
• Available equity at 80% LVR: $2.0m × 80% = $1.6m
• Usable equity (without LMI): $1.6m − $1.1m = $500k

But you won’t use all $500k. You still need an emergency buffer and transaction costs covered in cash or offset.

2.2 Worked repayment example

Assume the couple targets a $3.0m upgrade home and keeps a $2.0m loan against it, plus $800k in investment debt. At a stressed rate of 7.5% (roughly today’s rate plus 3% buffer):

• Home loan $2.0m, 25 years, 7.5% P&I: ≈ $14,910/month
• Investment loans $0.8m, 30 years, 7.5% IO: ≈ $5,000/month
• Total stressed repayments: ≈ $19,910/month

If combined after‑tax income is $35,000/month, the stressed repayment ratio is ≈ 57% – far above a safe 30–35% band. That tells them immediately: the desired house or portfolio size must shrink, or the time horizon must lengthen.

2.3 How banks will view your income

Practice owners and partners often have complex income: salary, trust distributions, dividends and irregular drawings. Lenders prefer simple, stable, well‑documented income.

A coordinated plan between accountant and broker, using shared cashflow assumptions, can lift borrowing power while staying within tax rules (see /insights/partners-directors-practice-owners-structure-income-banks-lend and /insights/dover-heights-professionals-structure-income-borrowing-power).