How To Lock In Finance When Your Income May Change

Buying off‑the‑plan while planning maternity leave, a career break or a business change is possible, but only if you assume your future income will look different – and design your finance around that from day one.

Lenders must reassess your situation at settlement, using your current income, updated policies and the lower of valuation or contract price. If your income has dropped or become harder to prove and you haven’t planned for it, your pre‑approval can collapse overnight.

This guide lays out practical steps – from modelling your post‑change income to choosing the right lender and buffers – so you can commit to a contract today and still settle calmly in 1–5 years’ time.

Map your income and life events across the off-the-plan build period before you sign.

1. Why income changes are so dangerous for off‑the‑plan buyers

1.1 How lenders really look at income at settlement

For off‑the‑plan, the only income that matters is what a lender can see and verify in the 1–3 months before settlement. They will:

1. Re‑verify all income with fresh payslips, tax returns or financials.
2. Apply their current policy (not the rules that applied when you first got pre‑approval).
3. Add at least a 3% APRA serviceability buffer above the actual rate.
4. Use the lower of the bank valuation or your contract price when calculating your maximum loan.

Any drop in income, change in employment type, or period out of the workforce hits this assessment immediately.

If you haven’t already seen it, it’s worth reading why many standard pre‑approvals fail at settlement in /insights/why-standard-pre-approvals-fail-off-the-plan-apartments.

1.2 The three big income‑change scenarios

Most income changes fall into three broad buckets:

• Family and personal life events
  Maternity/paternity leave, caring for a family member, study, or a move to part‑time.

• Career and employment moves
  Changing jobs, switching industries, going from PAYG to contracting or self‑employed.

• Business and investment shifts
  Starting or scaling a business, selling a practice, or restructuring how you pay yourself.

Any of these can be both rational and healthy life choices. The problem is timing: if your move lands in the 12–24 months before settlement, a lender may see you as less stable, even if the long‑term trajectory is upwards.

Roy Morgan’s research shows around 28% of Australian mortgage holders are already ‘At Risk’ of mortgage stress, with stress rising sharply when employment becomes uncertain. That’s exactly the cohort lenders want to avoid adding to — which is why they now scrutinise income stability as hard as income level.

2. Map your income change timeline before you sign anything

2.1 Build a simple “income storyboard”

Before you put down a deposit, sketch out the next 3–5 years:

• Today – contract exchange: your current role, income, bonuses, business profits.
• Year 1–2: any planned leave, career breaks, study, job changes, or start‑up plans.
• Year 2–5: how and when you expect to return to work or higher income.

Now compare that with your project’s timeline. Many Sydney off‑the‑plan projects run 2–4 years from deposit to settlement.

If your leave or business changes land:

• 0–12 months before settlement – highest risk. Lenders see you at your weakest income point.
• 12–24 months before settlement – medium risk. Some lenders will average income or want a full year of accounts.
• 2+ years before settlement – usually manageable if you’ve rebuilt stabilised income by the time of application.

2.2 Decide your “finance anchor date”

For each buyer, there is a finance anchor date – the ideal period when your income and policies look strongest. For most off‑the‑plan buyers this is:

• 6–18 months before settlement if you’re PAYG and stable.
• 12–24 months before settlement if you’re self‑employed and your income is volatile.

Your aim is to have:

• At least one full year of financials or payslips that reflect your post‑change income; and
• Enough time to react if a valuation comes in low or a lender’s policy tightens.

The article on your finance timeline for a Green Square purchase at /insights/green-square-off-the-plan-finance-timeline has a good stage‑by‑stage blueprint you can adapt to any suburb.

3. How lenders treat maternity leave, career breaks and business changes

3.1 Maternity or parental leave

Most lenders will consider parental leave sensitively, but they’re still bound by APRA’s prudential rules.

Common requirements if you’re on, or about to go on, leave:

• A signed return‑to‑work letter from your employer with role, FTE status and salary.
• Evidence of paid leave entitlements and any government parental leave.
• Updated living expenses including childcare and new dependants.

Some lenders will:

• Use your return‑to‑work income if you’re within a set timeframe (say, 3–12 months) and have a firm contract.
• Or assess you on your actual reduced income (or partner income only) if you don’t have concrete return plans.

3.2 Career break or part‑time move

If you voluntarily step back from full‑time work without a locked‑in return date:

• Lenders typically only use the current, lower income.
• They may shade casual or part‑time income by 20–50% if the pattern is irregular.

That can materially reduce borrowing capacity. For example:

• Couple currently earning combined $260,000 after tax.
• Loan repayments modelled at $8,000 per month at a 7.5% stressed rate.
• If one partner halves their income, combined net income might drop to ~$210,000.
• Keeping repayments below ~35% of net income (a practical buffer from other articles in this hub) would mean capping total housing costs around $6,125 per month, not $8,000.

Unless you’ve adjusted your borrowing and buffers, that income change can push you into real stress territory.

3.3 Moving from PAYG to self‑employed or contracting

This is the most misunderstood risk.

Most mainstream lenders want:

• Two full years of business tax returns and financials; or
• At minimum, one full year plus BAS statements and evidence the business is genuinely established.

If you leave PAYG to start a business between contract and settlement, the bank may treat you as having no usable income until you’ve built that history – even if your invoices look amazing.

For complex earners, lenders often care more about stability and documentation over 1–2 years than a single big income year, as explored in /insights/medical-legal-creative-eastern-suburbs-broker-reads-income.