Budgeting for a home loan when your income includes RSUs, bonuses, and base salary means accounting for volatility without underselling your actual capacity.
Lenders assess your income differently depending on whether it arrives consistently or in chunks. A developer earning $120,000 base plus $40,000 in annual RSUs will be treated differently to someone on a flat $160,000 salary, even though the total is identical. The difference sits in how lenders calculate serviceability. Base salary is counted at full value. Bonuses and RSUs are often discounted to 80% or less, and some lenders exclude them entirely if they have been received for less than two years. That discount affects how much you can borrow, not whether you can afford the repayment.
Your budget needs to reflect both what the lender will count and what you will actually earn. If you are confident your RSUs will vest and your bonuses will continue, you can structure your repayments around total income while keeping the lower serviceability figure in mind when comparing loan amounts across lenders.
Splitting Fixed Costs from Flexible Spend
Separate your expenses into two categories: non-negotiable costs that recur each month, and discretionary spending that flexes with your income or priorities.
Non-negotiable costs include rent, utilities, subscriptions, insurance, loan repayments, and childcare. Discretionary spending covers dining out, travel, entertainment, and anything else that can be paused or reduced without immediate consequences. Lenders apply the Household Expenditure Measure (HEM) benchmark when assessing your application, but your own breakdown determines how much buffer you keep once the loan settles. Consider a developer currently paying $2,400 a month in rent with $800 in fixed subscriptions and insurance, $1,200 in groceries and transport, and another $1,500 in discretionary spend. Their non-negotiable floor sits around $4,400. A mortgage repayment of $3,200 would replace the rent line, bringing the total commitment to $5,200 before discretionary costs. That leaves room to absorb rate rises or income gaps without touching emergency savings.
The value in this split is not just clarity during the application. It also tells you whether you are comfortable holding a mortgage through a period of lower income, such as between jobs or during unpaid leave. If your non-negotiable costs plus your mortgage repayment fit within your base salary, variable income becomes a funding source for goals rather than a dependency for survival.
How Lenders Assess Your Existing Debt
Every ongoing commitment reduces your borrowing capacity, and some cost you more than others in serviceability terms.
Credit cards are assessed on their limit, not their balance. A card with a $15,000 limit costs you roughly $450 per month in serviceability calculations, even if you pay it off in full each month. Buy now, pay later accounts are treated as ongoing debts if they appear on your credit file or bank statements. Personal loans, car loans, and HELP debts all reduce the amount you can borrow. A $20,000 car loan with $500 monthly repayments will cut your borrowing capacity by around $100,000, depending on the lender's interest rate buffer and assessment rate.
If you are six months away from applying, paying down or closing these accounts will increase the loan amount you can access. Closing a credit card you no longer use has an immediate effect. Paying out a car loan three months early does the same. The return on clearing a $15,000 credit card limit is not the interest saved, it is the $75,000 to $90,000 in additional borrowing capacity.
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Offset Accounts and How They Change Your Budget
An offset account sits alongside your home loan and reduces the interest charged each day based on the balance you hold in it.
If you have a $600,000 loan and $30,000 in your offset, you only pay interest on $570,000. Your repayment stays the same, but more of it goes toward reducing the principal. The benefit compounds when your income is lumpy. Developers who receive quarterly bonuses or annual RSU vests can park those funds in the offset until they are needed, cutting months or years off the loan term without locking the cash away. In our experience, clients who use their offset as their primary transaction account rather than a separate savings account see the most reduction in interest over time, because even short-term balances reduce the daily interest calculation.
Not all home loan products include a full offset. Some offer partial offsets that only reduce interest on a percentage of the balance. Others charge a higher interest rate or annual fee for the offset feature. The value depends on how much you expect to hold in the account. If you will keep less than $10,000 in offset on average, the fee may cost more than the interest saved. If you will hold $50,000 or more, the feature pays for itself within the first year.
Building Genuine Savings Alongside Your Application
Lenders require proof that your deposit has been saved over time, not borrowed or gifted without declaration.
Genuine savings are funds held in your own name for at least three months, demonstrated through bank statements. Savings from your regular income count. So do proceeds from vested RSUs or bonuses, provided the source is clear and the funds have been held in an account you control. Consider a developer who receives a $25,000 RSU vest in March and applies for home loan pre-approval in May. That $25,000 can be used as part of the deposit, but it may not be counted as genuine savings unless the lender can see it has been held for three months. The timing matters more than the source.
If you are relying on an upcoming bonus or RSU vest to reach your deposit target, confirm with your broker whether that income will be accepted as genuine savings at the time of application, or whether you need to wait. Some lenders accept one-off payments immediately if they are clearly employment income. Others require the three-month holding period regardless of source. Using RSUs and bonuses as genuine savings is common in tech, but the rules differ across lenders and ignoring them will delay your application.
Structuring Repayments Around Income Patterns
Monthly repayments are the default, but some lenders allow fortnightly or weekly payments that align with your pay cycle and reduce total interest.
Paying fortnightly means you make 26 half-payments per year, which equals 13 full monthly payments instead of 12. The extra payment cuts years off a 30-year loan without requiring a formal increase to your repayment amount. If your employer pays fortnightly, matching your mortgage repayment to that cycle also removes the need to manually transfer funds or hold cash between pay dates. Weekly payments work the same way but suit contractors or freelancers who invoice and receive payment outside a standard cycle.
The reduction in interest comes from paying down the principal more frequently, which lowers the daily balance used to calculate interest. On a $500,000 loan, switching from monthly to fortnightly repayments can save $40,000 to $60,000 in interest over the life of the loan, depending on the rate. Your budget does not change, but the loan term does.
Call one of our team or book an appointment at a time that works for you. We will walk through your income structure, work out what each lender will count, and build a budget that fits your repayment capacity without overcomplicating your cashflow.
Frequently Asked Questions
How do lenders assess bonuses and RSUs when calculating borrowing capacity?
Lenders typically discount bonuses and RSUs to 80% or less of their value, and some exclude them entirely if received for less than two years. Base salary is counted at full value, so total borrowing capacity may be lower than expected even if your actual income is higher.
Does closing an unused credit card increase how much I can borrow?
Yes. Lenders assess credit cards based on their limit, not the balance. Closing a $15,000 limit card can increase your borrowing capacity by $75,000 to $90,000, depending on the lender's assessment rate.
Can I use a recent RSU vest as part of my deposit?
You can use the funds, but they may not count as genuine savings unless held in your account for at least three months. Some lenders accept one-off employment income immediately, while others require the holding period regardless of source.
How does an offset account reduce interest on a home loan?
An offset account reduces the loan balance used to calculate daily interest. If you hold $30,000 in offset against a $600,000 loan, you only pay interest on $570,000, which reduces the total interest paid over time without locking funds away.
Does paying fortnightly instead of monthly actually save money?
Yes. Fortnightly payments result in 26 half-payments per year, which equals 13 full monthly payments instead of 12. The extra payment reduces the principal faster and can save tens of thousands in interest over the life of the loan.
