How Lenders Calculate Your Borrowing Capacity
Lenders assess borrowing capacity by multiplying your net monthly income by a serviceability buffer, then subtracting committed expenses and applying a hypothetical interest rate around 3% above current variable rates. For corporate lawyers, this calculation becomes more intricate when income includes bonuses, profit share, or partnership distributions that don't appear as standard salary.
Consider a senior associate earning a base salary of $180,000 with annual bonuses averaging $40,000 over the past two years. Most lenders will accept 80% of that bonus as assessable income after reviewing employment contracts and payment history. That adds roughly $32,000 to your assessable income, which translates to an additional $120,000 to $150,000 in borrowing capacity depending on your other commitments and the lender's serviceability rate.
The actual formula varies between lenders, but the standard approach applies a net surplus ratio after accounting for living expenses, existing debts, and a serviceability buffer. Some lenders use the Household Expenditure Measure (HEM), which applies standardised living costs based on household size and income bracket. Others rely on your actual declared expenses, which can work in your favour if you maintain lower discretionary spending.
Why Your Employment Structure Affects Assessable Income
Partnership income, deferred bonuses, and profit share arrangements require different treatment during assessment. Lenders typically average this variable income over two financial years and apply a discount depending on consistency and documentation quality.
In our experience, newly promoted partners often face a timing issue. Your first year of partnership income may not appear on tax returns until six months after financial year end, meaning you're being assessed on employed income that no longer reflects your earning capacity. Some lenders will accept a letter from your firm confirming the promotion and projected distributions, but others require completed tax returns showing the income over two full years. If you're planning to apply for a home loan within the first year of partnership, speaking with a broker who understands legal industry income structures can prevent delays.
Self-employed barristers face a parallel challenge. Chambers income fluctuates, and lenders scrutinise profit margins after deducting business expenses. A barrister earning $250,000 in gross fees but claiming $80,000 in allowable deductions will be assessed on the net figure, not the headline amount. This is where low doc loans or specialist legal professional programs become relevant, particularly for those with complex structures involving trusts or corporate entities.
How Existing Debts Reduce Your Capacity
Every ongoing commitment reduces the surplus income available to service a new loan. Lenders apply minimum repayment buffers to credit cards, personal loans, and investment property debt when calculating what you can borrow.
A $20,000 credit card limit with a zero balance still reduces your capacity by around $60,000 to $80,000, because lenders assume you could draw the full limit at any time. The calculation uses a notional repayment of 3% to 3.5% of the limit per month. If you're not using the facility, closing it or reducing the limit before applying improves your position materially. Similarly, car loans and personal debts are factored at their actual repayment amount plus a buffer, so clearing short-term commitments before lodging an application often yields more capacity than increasing your deposit.
Investment property debt is assessed differently. Lenders apply a rental income shading, typically accepting 70% to 80% of rental income to account for vacancy and maintenance costs. If your investment property generates $2,400 per month in rent, the lender may only credit $1,920 in your serviceability calculation. The loan repayment on that property is then deducted at either the actual rate or a buffered rate, depending on whether it's an interest only or principal and interest loan. For those considering expanding your property portfolio, understanding this shading mechanism is essential when determining how many properties you can hold before capacity constraints bind.
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The Role of Deposit Size in Capacity Calculations
A larger deposit doesn't increase the income-based capacity calculation, but it does reduce the loan amount required and can eliminate Lenders Mortgage Insurance, which in turn reduces your ongoing costs and improves serviceability.
For lawyers with access to LMI waivers, this dynamic shifts. You can borrow up to 90% of the property value without incurring LMI, meaning your deposit requirement drops while your net borrowing capacity remains unchanged. That frees up capital for other purposes, whether that's retaining liquidity, contributing to super, or funding a second purchase sooner.
Deposit size also influences the interest rate you're offered. Borrowing at 80% loan to value ratio typically attracts better pricing than borrowing at 90% or 95%, which lowers your monthly repayment and improves the surplus available for serviceability. The difference between a 5.8% variable rate at 80% LVR and a 6.1% rate at 90% LVR might seem modest, but across a $700,000 loan it translates to roughly $150 per month, which in turn affects how lenders view your ability to service additional debt.
How Lenders Treat Offset Accounts and Redraw Facilities
Funds held in an offset account or available through redraw are not counted as assessable income, but they do provide a buffer that some lenders view favourably when assessing marginal applications. An offset account linked to your owner occupied home loan reduces the interest charged without affecting the loan balance, which improves your actual cash flow even if it doesn't change the formal serviceability calculation.
If you're refinancing or applying for a second property, demonstrating a consistent offset balance signals financial discipline. We regularly see this tip the balance on applications where the declared surplus is tight. A $50,000 offset balance doesn't add $50,000 to your borrowing capacity, but it does demonstrate repayment capability beyond what the income statement alone suggests.
Redraw facilities function similarly in principle but are treated with less weight because those funds remain part of the loan balance. If you've paid down a loan and built up $30,000 in available redraw, that's evidence of surplus income, but it won't be credited as savings or cash reserves in the same way an offset balance would be.
The Impact of Fixed Versus Variable Rate Selection on Capacity
The interest rate type you select doesn't change the income or expense inputs lenders use to calculate capacity, because they assess serviceability at a buffered rate regardless of whether you choose a fixed or variable product. However, the actual repayment on a fixed rate loan is locked, which provides certainty over your cash flow during the fixed period.
A split loan structure, where part of the debt is fixed and part remains variable, doesn't increase capacity but does allow you to manage repayment variability if rates move. If you're planning to refinance within a few years, keeping a portion on a variable rate avoids break costs while still providing some rate protection. This becomes relevant when calculating capacity for a second purchase, because lenders will reassess your existing commitments at their actual rates plus the serviceability buffer.
For those considering interest only loans, the lower repayment improves short-term cash flow but doesn't increase the capacity calculation. Lenders assess interest only loans at the principal and interest equivalent when determining serviceability, so the benefit is in freeing up cash for other investments rather than borrowing more against the same property.
When to Reassess Your Borrowing Capacity
Borrowing capacity isn't static. Income changes, debts are repaid, living expenses shift, and lender policies adjust. If you've received a promotion, cleared a car loan, or reduced your credit card limits, your capacity has likely improved since your last assessment.
Many corporate lawyers we work with reassess capacity annually as part of their broader financial planning, particularly if they're planning to purchase an investment property or upgrade their principal residence. Getting loan pre-approval with updated figures gives you a clear view of what you can commit to before engaging with vendors or attending auctions. Pre-approval also locks in a rate and product for a defined period, usually 90 days, which protects you from rate increases during your search.
If you're approaching fixed rate expiry, that's another natural point to reassess. Your repayment will shift to the current variable rate, which may be higher or lower than the expiring fixed rate, and your capacity calculation will reflect the new serviceability position. Refinancing at that point may unlock better pricing or additional features, and it's an opportunity to adjust your loan structure to align with changed circumstances.
Call one of our team or book an appointment at a time that works for you. We'll provide a detailed capacity assessment based on your current income structure, existing commitments, and the lending policies most relevant to corporate lawyers, so you can make informed decisions about timing, deposit, and loan structure without guessing at the numbers.
Frequently Asked Questions
How do lenders assess bonuses and profit share for borrowing capacity?
Lenders typically average variable income such as bonuses and profit share over two years and accept 80% of that average as assessable income. You'll need to provide employment contracts, payment summaries, and bank statements showing consistent receipt of these amounts.
Does closing an unused credit card increase my borrowing capacity?
Yes, a credit card with a $20,000 limit can reduce your borrowing capacity by $60,000 to $80,000 even if the balance is zero. Lenders assume you could draw the full limit, so closing or reducing unused facilities improves your serviceability calculation.
Will a larger deposit increase how much I can borrow?
A larger deposit doesn't increase the income-based capacity calculation, but it reduces the loan amount required and may improve your interest rate, which lowers repayments and improves serviceability. For lawyers with LMI waivers, deposit size becomes less critical to overall capacity.
How does partnership income affect my borrowing capacity?
Partnership income is averaged over two financial years and may be discounted depending on consistency. Newly promoted partners often face delays because tax returns don't reflect current income, though some lenders accept confirmation letters from the firm.
When should I reassess my borrowing capacity?
Reassess your capacity after income changes, debt repayments, or when planning a property purchase. Many lawyers reassess annually or when approaching fixed rate expiry to ensure their borrowing position reflects current circumstances and lender policies.
