How Australian Lenders Calculate Borrowing Power When Your Salary Is Paid in Multiple Currencies Simultaneously
When an Australian expat earns income across two or more currencies at the same time, lenders do not simply add the figures together and convert at today’s rate. This article contains general information only and does not constitute personal credit advice. Each income stream is assessed separately: the currency is identified, a lender-specific shading discount is applied, and only the residual amount counts toward your borrowing capacity. The result is that two borrowers with identical total income can qualify for very different loan amounts depending on which currencies they earn in, how those currencies are documented, and which lender assesses the application. Borrowing power and approval outcomes depend on individual circumstances and individual lender policy.
TL;DR
- Borrowing power is calculated by subtracting tax, living expenses, existing debts, and a stressed loan repayment amount (calculated using a rate buffer added to the proposed loan rate) from gross income.
- Foreign income is further reduced by a lender-specific “shading” discount before it enters that formula.
- When income spans multiple currencies, each stream is shaded independently, so the order and mix of currencies directly affects your assessed capacity.
- Lender policies on acceptable currencies and shading rates vary widely and are not publicly published.
- Specialist broker knowledge of per-lender foreign income treatment is the single most important variable in maximising borrowing power for multi-currency earners.
What Does “Borrowing Power” Actually Mean for an Expat?
Borrowing power is the maximum loan amount a lender is willing to extend based on your assessed ability to service the debt. The core formula works by subtracting tax, existing financial commitments, and living expenses from gross income, then testing whether a stressed loan repayment amount can also be met. Lenders are required to add at least a 3% buffer to the proposed loan’s interest rate and use the resulting higher rate to calculate the stressed repayment that must be serviceable from remaining income. Whatever net capacity remains determines how large a loan the lender will consider. For a domestic salaried employee this is relatively straightforward. For an expat earning in two or three currencies simultaneously, the calculation gains several extra layers before it even reaches that standard formula.
The standard components of the formula are:
- Gross income across all accepted sources
- Minus income tax (Australian and, where applicable, foreign)
- Minus existing debt repayments (credit cards, personal loans, other mortgages)
- Minus assessed living expenses
- Minus a stressed loan repayment calculated at the proposed loan rate plus a serviceability buffer
For multi-currency earners, a prior step exists: each foreign income stream must be converted to AUD and then discounted before it enters the formula above.
How Does “Income Shading” Work on Foreign Currency Salaries?
Income shading is the discount a lender applies to foreign currency income before counting it toward borrowing capacity. It exists because lenders are managing two risks simultaneously: exchange rate volatility and income verification difficulty. A lender that accepts 100% of a foreign salary at today’s spot rate is implicitly betting that rate holds for the full loan term, which can run 25 to 30 years.
Shading policies differ by lender and by currency. A major currency like USD or SGD will typically attract a smaller discount than a less liquid or more volatile currency. Critically, these policies are not published. They sit inside each lender’s credit policy documents and change without public notice.
The practical effect on a multi-currency earner looks like this:
| Income Stream | Gross Monthly (AUD equivalent) | Illustrative Shading Applied | Assessed Monthly Income |
|---|---|---|---|
| Base salary (SGD) | $15,000 | Lender A: 80% | $12,000 |
| Bonus (USD) | $6,000 | Lender A: 60% (bonus component) | $3,600 |
| Allowances (HKD) | $3,000 | Lender A: 0% (not accepted) | $0 |
| Total assessed | $24,000 | $15,600 |
Note: Shading rates shown above are illustrative only. Actual rates depend on individual lender policy, which changes over time and is not publicly available.
The same borrower at Lender B, which accepts all three currencies at different rates, might arrive at a meaningfully different assessed income figure, which in turn changes the maximum loan they qualify for.
Which Specific Factors Drive Shading Differences Across Lenders?
Building on the shading mechanics above, the harder question is what actually drives one lender to shade more aggressively than another. There are four primary variables:
- Currency liquidity and stability: Major reserve currencies (USD, EUR, GBP, SGD, JPY, HKD, AED) are generally treated more favourably than currencies with thinner trading volumes or managed exchange rates.
- Income type within a currency: Base salary, guaranteed allowances, discretionary bonuses, commissions, and equity vesting are each assessed differently. A lender may accept 80% of a USD base salary but only 50% of a USD annual bonus. Lender policies vary and are subject to change.
- Employment structure: A PAYE employment contract issued by a recognised multinational is typically viewed more favourably than contractor or self-employed income in a foreign currency, even if the dollar amounts are identical.
- Country of employment risk: Some lenders apply an overlay for geopolitical or economic risk in the country where the income is sourced, independent of the currency itself.
What Documentation Do Lenders Need to Verify Multi-Currency Income?
Stepping back from the credit mechanics, a separate and equally important concern is documentation. A lender cannot shade income it cannot first verify. For multi-currency earners, the verification burden multiplies because each income stream needs its own evidence chain.
Documentation requirements across most lenders accepting foreign income generally include:
- Payslips for each income stream (usually two to three months), ideally showing the currency denomination clearly
- Employment contract or letter confirming base salary, allowance structure, and bonus terms
- Bank statements showing salary credits in the relevant foreign currency accounts
- If income spans jurisdictions, evidence of tax treatment in each country (to assess net income available for debt servicing)
- For allowances paid in a separate currency, a breakdown letter from the employer is frequently required
Where documents are not in English, certified translation adds both time and cost to the application. Planning documentation early is more effective than rushing it at pre-approval stage.
How Does the Stress-Test Buffer Interact with Multi-Currency Income?
Once foreign income has been shaded and verified, it enters the standard serviceability calculation alongside a mandatory buffer on the proposed loan rate. This buffer tests whether the borrower could still service the loan if interest rates were to rise. Current regulations require lenders to apply at least a 3% serviceability buffer, meaning the proposed loan is assessed at a rate 3 percentage points above the actual loan rate. These requirements may change over time. The buffer rate applies regardless of whether income is earned in AUD or a foreign currency.
The compounding effect for multi-currency earners is notable. Shading reduces gross income before it enters the formula, and then the stress-test buffer increases the assessed repayment amount simultaneously. Both adjustments move in a direction that reduces the assessed maximum loan. This is why the same total gross income produces a lower borrowing capacity for a foreign-income borrower than it would for an equivalent domestic earner.
Frequently Asked Questions
Does every Australian lender accept multi-currency income?
No. Some lenders only accept income denominated in a defined list of currencies. Others will not accept income from certain countries regardless of currency. Lender policies vary and are subject to change without public notice.
Can allowances paid in a second currency (like housing or education allowances) count toward borrowing power?
Some lenders will include certain allowances, but the treatment varies by lender and by the nature of the allowance. Guaranteed contractual allowances are more likely to be accepted than discretionary ones. The specific currency of the allowance also affects whether it is accepted at all. Lender policies vary and are subject to change.
Which exchange rate does a lender use when converting foreign income to AUD?
Lenders typically use a published rate (often a major bank’s rate or an RBA reference rate) at the time of assessment. Because this rate changes daily, the AUD equivalent of the same foreign salary can shift between application and settlement. This is one reason lenders apply shading on top of conversion rather than relying solely on spot rates.
Does earning in a stronger currency like USD improve borrowing power compared to an equivalent AUD salary?
Not automatically. The gross AUD-equivalent figure may appear higher, but after shading discounts the assessed income can be lower than the equivalent AUD amount. The net result depends on which lender you apply with and their specific policy on that currency.
Is the content in this article personal credit advice?
No. This article is general information only. Borrowing power, loan approval outcomes, and LVR eligibility depend on individual circumstances and individual lender policy. For advice specific to your situation, you should speak with a licensed mortgage broker. ODIN Mortgage is regulated under ASIC and the National Consumer Credit Protection Act (NCCP).
How is bonus income across two currencies treated differently from base salary?
Most lenders assess base salary more favourably than bonus income even within the same currency, because bonuses are considered less certain. When bonuses are paid in a second currency, the borrower faces two compounding discounts: one for the income type (bonus vs. base) and one for the currency. This makes bonus income the most commonly under-assessed component for multi-currency earners.
What is the single most effective thing a multi-currency earner can do before applying for an Australian mortgage?
Work with a broker who holds current, lender-specific foreign income shading data before choosing a lender. Submitting to the wrong lender first can result in a declined application that then appears on your credit file. Knowing which lender gives the best assessed outcome for your specific currency mix before you apply is more valuable than any other preparation step.
About ODIN Mortgage
ODIN Mortgage is a mortgage brokerage exclusively for Australian citizens, permanent residents, and foreign investors living overseas. Part of ODIN alongside Odin Tax, ODIN Mortgage combines mortgage structuring, tax planning, and conveyancing under one coordinated team, the only provider in the market to do so for Australian expats. With access to a panel of 40+ Australian lenders accepting foreign income and proprietary lender-by-lender shading data built over 10+ years of deal flow, ODIN Mortgage gives multi-currency earners the lender intelligence needed to maximise assessed borrowing capacity, not just the tools to estimate it. Winner, Best Boutique Non-Franchise Office, Better Business Awards 2024. Regulated under ASIC and the National Consumer Credit Protection Act (NCCP).
Earning across multiple currencies and unsure how much you can actually borrow in Australia? ODIN Mortgage’s team can assess your specific currency mix against our panel of 40+ lenders and show you exactly how your income will be treated before you apply.
Get your foreign income borrowing assessment at odinmortgage.com
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