Boost your borrowing capacity in 2026: the 7 levers that actually move the number

Borrowing capacity is the single biggest lever on your property portfolio — and the most under-managed. Two identical households can have a $200k borrowing gap purely because of how their finances are presented to the lender. The good news: most of those levers are pullable inside 14 days.

How banks actually calculate it (2026)

The bank takes your gross income, deducts a notional household expense floor (HEM), deducts all existing debt commitments at an APRA-stressed rate (typically loan rate + 3%), deducts a buffer for tax, and divides what’s left by the assessment rate. The result is your monthly “surplus” — which the bank converts back into a maximum loan amount.

The seven levers

1. Lender selection

The biggest single lever. Different lenders treat rental income (60% to 90%), existing IO debt (some assess at actual P&I, some at stressed P&I), and HECS (some include only the current year’s repayment) very differently. A good broker tests 4–6 lenders before choosing.

2. Credit cards and BNPL

A $15k unused credit card limit reduces capacity by roughly $80k. Close every card you don’t use. Close BNPL accounts (Afterpay, Zip) — even a zero balance counts.

3. Interest-only on investment loans

During the accumulation phase, IO frees serviceability for the next deposit. APRA caps mean not every loan can be IO, and rates are slightly higher — but the capacity unlock is usually worth it.

4. HECS reporting

HECS is assessed differently by every lender. Some include the balance, some only the annual repayment, some ignore it for income above a threshold. If you’re close to paying it off, paying the balance in full before applying often unlocks $50k+.

5–7. Living expenses, rental income, income shaping

Genuine reductions in declared expenses (cancel unused subscriptions, downgrade insurance you don’t need) move the number. Rental income on existing properties needs to be documented with PM statements. Bonus and RSU income usually requires 2 years of history before banks count it — start documenting now.