Key Takeaways
- Serviceability is the lender’s assessment of whether the borrower’s cash flow can comfortably support the loan repayments, including a buffer for adverse scenarios.
- The calculation has five inputs: income (salary, rent, business profit), commitments (existing debt, household costs), the proposed loan repayment, a stress-test buffer, and the loan term and structure.
- Lenders apply add-backs to normalise business profit, shade rental income for vacancy and outgoings, and stress-test repayments at higher rates than the actual loan rate.
- Borrowers can usually improve their serviceability position before applying by clearing personal commitments, lodging current tax returns, structuring add-backs clearly, and extending loan terms where it makes sense.
What Serviceability Actually Means
Serviceability is the lender’s test of whether the borrower has sufficient sustainable cash flow to cover loan repayments on top of their existing commitments, with a sensible buffer for adverse changes. The calculation runs underneath every commercial loan approval. The lender adds up the borrower’s recognisable income, subtracts existing commitments and the proposed new loan repayment (calculated at a stress-tested rate), and checks whether what remains is positive by a comfortable margin.
The mechanics are not mysterious, but they vary between lenders. Each lender has its own assessment policy: how it recognises business income, what add-backs it accepts, how heavily it shades rental income, what buffer it applies above the loan rate, and how it treats existing commitments. Two lenders evaluating the same borrower can produce serviceability outcomes that differ by 20% to 30%, which is why the same deal may be approved by one lender and declined by another. Hence, understanding how the calculation works helps borrowers present their position well and helps brokers route deals to lenders whose policies fit the borrower’s specific profile.
This guide walks through how lenders calculate commercial loan serviceability, what they include in income, how they treat add-backs and commitments, what buffer they apply, and how the loan term affects the outcome. If you want to assess your serviceability position before lodging an application, speak with a Loanworx broker about your serviceability position on a specific deal, and the team can model the calculation against several lenders’ policies before any formal application is lodged.
The Core Serviceability Framework
Most commercial lenders use a similar high-level framework for serviceability, although the specific parameters differ. Understanding the framework makes the individual policy variations easier to follow.
The Basic Equation
Serviceability looks at: (recognisable income) minus (existing commitments) minus (proposed new loan repayment at stress-tested rate) minus (household or business living expenses). If the result is positive by a comfortable margin (the buffer), the lender treats the deal as serviceable. If it is marginal or negative, the lender may decline, reduce the loan amount, or impose additional conditions.
The Three Main Ratios Lenders Calculate
Three ratios commonly appear in commercial serviceability assessment. The Debt Service Coverage Ratio (DSCR) measures how comfortably the borrower’s cash flow covers the loan repayments, typically requiring a DSCR of 1.25 to 1.50 for standard deals. The Interest Cover Ratio (ICR) measures how comfortably operating profit covers interest expense, typically requiring an ICR of 1.50 to 2.00. The Loan to Value Ratio (LVR) sits alongside serviceability rather than within it, but interacts with serviceability when high LVR triggers tighter serviceability standards.
Why Lenders Vary in Their Calculations
Different lenders calibrate the framework differently. A lender comfortable with a deal type may apply lighter buffers, more generous income recognition, and softer ratio requirements. A lender on the edge of their appetite may apply stricter buffers, tighter income recognition, and harder ratio thresholds. The same underlying borrower can sit comfortably with the first lender and just outside policy with the second.
Income Recognition
How the lender recognises income is the largest single driver of serviceability outcomes. Different income types receive different treatment, and lenders’ policies on what counts vary materially.
PAYG Salary Income
Salary income from an employer is the most straightforward type of income. Lenders typically use 100% of gross salary as recognisable income, supported by payslips and PAYG payment summaries. Bonuses, overtime, and commission income are usually shaded (lenders count only 50% to 80%), reflecting that these are less predictable than base salary. For new employees still in probation, some lenders apply additional caution.
Self-Employed Income
Self-employed income is more complex. The lender typically uses the borrower’s taxable income as shown on personal tax returns, sometimes averaged over the most recent one to two years. Where the business has been growing, the most recent year is often used; where it has been declining, the average provides a more conservative figure. The income figure is then adjusted by add-backs (covered below) to produce a normalised view.
Commercial Rental Income
Rental income from commercial property is recognised with adjustments for vacancy risk and outgoings. Lenders typically shade gross rental income by 20% to 40% to allow for vacancy periods, leasing costs, and ongoing property outgoings (rates, insurance, repairs, body corporate fees). At a $100,000 gross annual rent, lenders may recognise only $60,000 to $80,000 as serviceable income. Lease quality (tenant strength, lease term, security deposits, make-good obligations) affects the extent to which shading is applied.
Trust and Distribution Income
Income from trust distributions is recognised based on the borrower’s history of receiving distributions. Lenders typically want to see consistent distributions over one to two years before counting the income. Where distributions are at the trustee’s discretion (most discretionary trusts), some lenders exercise additional caution because there is no contractual right to receive future distributions.
Dividend and Investment Income
Dividend income from shares and partnership distributions is recognised based on the borrower’s historical receipt of these amounts. Lenders typically use a two-year average, with conservative shading for income from concentrated holdings or where dividends have varied materially. Capital gains are usually not counted as recurring income.
Business Profit and Add-Backs
For business borrowers (companies, trusts, or self-employed individuals) buying commercial property, business profit is the central serviceability input. The starting point is the business’s net profit, with adjustments to reflect the underlying cash flow available to service debt.
Why Net Profit Alone Is Not the Right Starting Point
Net profit, as shown in financial statements, reflects accounting rules rather than cash flow. Several non-cash or one-off items reduce reported profit without affecting the borrower’s cash position. The lender adjusts the reported profit to produce a normalised cash flow figure that better reflects what the business can sustain.
Standard Add-Backs
Standard add-backs include: depreciation and amortisation (non-cash expenses that reduce reported profit), interest on existing debt that will be replaced or restructured by the new loan, owner’s salary or director’s remuneration (where the owner can adjust this for the new loan structure), and one-off expenses that will not recur (legal costs for a specific matter, one-off marketing campaigns, equipment write-downs).
Which Add-Backs Lenders Accept
Lenders accept add-backs that are properly documented and clearly non-recurring or related to existing financing. Add-backs that lenders may resist include aspirational add-backs (cost savings that have not yet been achieved), undocumented owner adjustments (where there is no clear evidence that the owner could actually take a lower salary), and add-backs that suggest the underlying business is less profitable than the statements indicate. The borrower’s accountant typically prepares the add-back schedule and supports each item with notes.
EBITDA as a Common Shorthand
Many lenders use EBITDA (earnings before interest, tax, depreciation, and amortisation) as a shorthand for normalised business cash flow. EBITDA captures most of the standard add-backs automatically and is widely understood. For business borrowers, presenting financials with a clear EBITDA calculation usually speeds the lender’s assessment. The lender may still apply their own adjustments, but EBITDA provides a useful starting point.
Industry Variations
Different industries have different add-back conventions. Professional service practices (medical, legal, accounting) often have specific income recognition methodologies that account for partner remuneration and for practice service-entity structures. Hospitality businesses may have specific treatment of seasonal variations. Retail businesses may need to address inventory funding requirements. Specialist commercial brokers familiar with each industry usually know which add-backs lenders in that segment routinely accept.
Existing Commitments
Existing commitments are subtracted from recognisable income to produce the borrower’s surplus available for new debt service. Lenders include both contractual debt obligations and broader living expense estimates.
Existing Debt Commitments
All existing loan facilities are included: home loans, commercial loans, equipment finance, vehicle finance, business overdrafts, credit cards (assessed at minimum repayment plus a buffer, even if the balance is paid in full each month), and personal loans. Each is typically assessed at its contractual repayment amount, although lenders sometimes apply a stressed rate to variable facilities.
Contingent Liabilities and Guarantees
Personal guarantees that the borrower has provided for other parties are also included in the commitment analysis. A director who has guaranteed another company’s borrowing has a potential commitment if that other company defaults. Lenders typically include guarantees at their face value, although some apply lighter treatment depending on the perceived probability of enforcement.
Household Living Expenses
Personal living expenses are included for individual borrowers and directors. Lenders typically use the borrower’s declared living expenses, benchmarked against the Household Expenditure Measure (HEM) or similar standards. If declared expenses are well below the HEM, lenders may substitute the higher HEM figure. This is particularly relevant for owner-occupier commercial purchases where the directors’ personal cash flow supports the deal.
Business Operating Expenses
For business borrowers, operating expenses are already netted off in arriving at EBITDA or net profit, so they are not double-counted. However, lenders sometimes add additional buffers for expected expense growth, particularly where the business is growing or facing known cost pressures. Capital expenditure requirements (for the replacement of plant and equipment) are sometimes included as a separate commitment item, particularly for capital-intensive businesses.
Buffers and Stress-Testing
Lenders do not assess serviceability at the actual loan rate; they apply a buffer to test whether the borrower can still service the loan if rates rise. The buffer is one of the most important parameters in the calculation.
Why Buffers Exist
Buffers exist because loan rates change over the life of the loan, and the borrower’s circumstances may also change. A loan that is comfortably serviceable today at 6.5% may be tight at 8.5% if rates rise. The buffer is the lender’s protection against this risk. Without a buffer, every loan would be approved at the limit of the borrower’s cash flow, with no margin for adverse changes.
Typical Buffer Sizes
APRA’s prudential standards require authorised deposit-taking institutions (ADIs) to apply a 3% buffer above the loan rate when assessing residential lending. Commercial lenders are not formally bound by the same requirement, but many apply similar internal buffers (typically 2.5% to 3.5%) to commercial deals. For a 6.5% loan, assess serviceability at 9%-10% rather than 6.5%. The effect on borrowing capacity is significant.
Stressing the Repayment, Not the Rate
The buffer is applied by recalculating the loan repayment at the stressed rate. A $1 million loan at 6.5% over 25 years has a monthly P&I repayment of approximately $6,752. The same loan at 9.5% (assuming a 3% buffer) has a monthly repayment of approximately $8,737, around $1,985 higher. The borrower needs to demonstrate they can service the higher figure, not just the actual repayment.
Buffer Variations by Loan Type
Some lenders apply additional buffers to specific loan types. Interest-only loans often include a buffer that covers both the IO period and the post-IO step-up to P&I. Variable-rate loans include the standard interest-rate buffer. Fixed rate loans are sometimes assessed at the fixed rate plus a smaller buffer, since the rate is locked. The lender’s specific policy on buffer application by loan type affects the loan amount that can be achieved.
Loan Term and Amortisation
The loan term and amortisation structure feed into the serviceability calculation through the repayment amount. The same loan amount can produce very different serviceability outcomes depending on the term and structure.
How Longer Terms Affect Serviceability
Longer loan terms produce lower regular repayments, which makes serviceability easier to meet. A $1 million loan at 6.5% has monthly P&I repayments of approximately $7,757 over 20 years versus $6,752 over 25 years, a difference of approximately $1,005 per month. Borrowers near the edge of serviceability can sometimes shift the calculation into approval territory by extending the term.
Interest-Only Periods and Serviceability
Interest-only periods reduce regular repayments, improving serviceability during that phase. However, lenders typically assess serviceability against both the post-IO and IO repayments to ensure the borrower can absorb the step-up when the IO ends. For a $1 million loan at 6.5% with a 5-year IO period, the IO monthly repayment is around $5,417. Lenders also test the post-IO P&I repayment over 20 years, which is approximately $7,757.
Balloon Payments and Serviceability
Balloon payments result in lower regular repayments because only part of the principal is amortised. The lender’s serviceability calculation often includes a check that the balloon can be refinanced at maturity, sometimes by modelling the balloon refinance as a separate facility within the borrower’s broader debt position. Borrowers using balloon structures should be prepared for this additional analysis.
Amortisation Schedule Versus Facility Term
Some commercial loans have a longer amortisation schedule than the facility term (for example, a 10-year facility amortising as if over 25 years). Lenders typically use amortising repayments for serviceability assessment, which yields a more favourable result than calculating against the shorter facility term. This is one structural reason why commercial property loans often present better serviceability than they might initially appear to.
A Worked Example: $1.4 Million Owner-Occupier Purchase
To make the framework concrete, consider an owner-occupier business buying $1.4 million commercial premises at 70% LVR, so a $980,000 loan. The business has a $500,000 annual turnover, $120,000 EBITDA after a director’s salary of $90,000, and the director also receives no other significant income. The loan is requested at 6.5% P&I over 25 years.
Step 1: Income Recognition
Director’s salary of $90,000 (recognised at 100%). Business EBITDA of $120,000 (after the $90,000 director’s salary, so the total cash flow potentially available is $120,000 + $90,000 = $210,000 if the director is willing to reduce salary. The lender typically uses the higher figure for owner-occupier deals where the director can adjust salary, but applies caution if there’s no evidence of past adjustments. Conservative working figure: $210,000.
Step 2: Add-Backs
EBITDA already excludes interest, tax, depreciation, and amortisation. If the business has $15,000 in interest on existing facilities being refinanced and $20,000 in depreciation, those are already in the $120,000 EBITDA figure. Other potential add-backs (one-off legal costs of $5,000 and owner-related expenses of $8,000) could add $13,000. Adjusted EBITDA: $133,000. Total potential cash flow: $223,000.
Step 3: Commitments
Director’s home loan repayment of $36,000 per year. Existing equipment finance of $24,000 per year (being kept). Credit card minimum repayments are assessed at $4,800 per year. Household living expenses (single applicant, no dependants) of $42,000 per year. Total commitments: $106,800.
Step 4: Proposed Loan at Stressed Rate
The $980,000 loan at 6.5% over 25 years P&I has monthly repayments of approximately $6,617, or $79,400 per year. At a stressed rate of 9.5% (3% buffer), the assessment repayment becomes approximately $8,562 per month, or $102,700 per year.
Step 5: The Calculation
Income $223,000 less commitments $106,800 less stressed loan repayment $102,700 = $13,500 surplus. The DSCR is $223,000 / ($106,800 + $79,400) = 1.20, which is below the typical 1.25 threshold but close. The lender would likely consider this marginal but possibly approvable, depending on the borrower’s strength elsewhere (security, industry, trading history). A specialist commercial broker would route this to a lender with an appetite for marginal-serviceability deals, or explore ways to strengthen the position (longer term, lower loan amount, additional security).
Common Pitfalls that Hurt Serviceability
Several common issues recur as reasons borrowers fail the serviceability assessment. Recognising these helps borrowers address them before applying.
Outdated Financials
Old financials understate the borrower’s current trading position when the business is growing. Lenders typically use the most recent finalised year, but where the year is more than 6 months old, year-to-date management accounts help support a stronger position. Borrowers with growing businesses benefit from getting their financials current before applying.
Undocumented Add-Backs
Add-backs without clear documentation get rejected. A business owner saying ‘we could reduce the marketing spend’ is not evidence that marketing spend will actually be reduced. Add-backs need to be supported by board minutes, evidence of one-off items, or clear non-cash classifications in the financials. The accountant should prepare a structured add-back schedule.
Hidden Commitments
Lenders perform credit checks and discover hidden commitments. Forgotten credit cards, old loan facilities never closed, undisclosed guarantees, or related-party arrangements all surface and damage credibility if not declared upfront. Disclosing all commitments at the start, even small ones, is better than having them discovered.
Aspirational Income
Income projections beyond what historical financials support are usually heavily discounted or excluded. A borrower expecting business growth to support the loan needs to either provide evidence of the growth (signed contracts, recent monthly trading) or accept that the lender will assess based on the historical position rather than the projected one.
Living Beyond HEM
Personal living expenses well above the Household Expenditure Measure are scrutinised. Lenders may apply the higher figure if it appears the borrower’s actual lifestyle is more expensive than declared. Substantial discretionary spending, as shown in bank statements (multiple subscription services, regular high-cost dining, large discretionary purchases), signals genuine ongoing expenses.
Practical Pointers for Improving Serviceability
Borrowers can usually improve their serviceability position by addressing specific issues before lodging the application.
Clear Out Personal Commitments
Closing unused credit cards, paying off small personal loans, and reducing credit card limits all reduce assessed commitments. The reduction in serviceability burden can be material; a $20,000 credit card limit (even at zero balance) typically reduces assessed serviceability by $1,000 to $1,500 per month at the lender’s assessment rate.
Lodge Current Tax Returns
Current tax returns provide the clearest evidence of income. Borrowers with overdue returns should lodge them before applying. When the most recent year is materially stronger than the prior year, lodging early allows the lender to use the better figure rather than averaging across a weaker prior year.
Structure Add-Backs Clearly
Working with the accountant to prepare a clear add-back schedule, with each item supported by documentation, expedites the lender’s assessment and strengthens the most defensible position. Reactive add-back justification during assessment usually produces a more conservative outcome than a well-prepared upfront schedule.
Extend the Loan Term Where It Fits
Extending the term reduces the assessment repayment and improves serviceability. The trade-off is a higher total interest over the loan’s life, but for borrowers near the serviceability edge, an extended term can move the deal from declined to approved. The borrower can also make extra repayments to effectively shorten the term in practice, while keeping the formal term long for serviceability purposes.
Consider Alternative Lenders
Different lenders have different policies. A deal that does not fit one lender’s serviceability framework may fit another’s. Specialist commercial brokers know which lenders apply lighter buffers, more generous income recognition, or specific policies for the borrower’s profile. Routing the deal to the right lender often produces approvals that broader-market applications could not achieve.
Where to Read About Cash Flow Management
Serviceability is fundamentally about cash flow assessment. Understanding how to manage and present business cash flow strengthens both the loan application and the underlying business position. Lenders see better-prepared cash flow analysis as evidence of well-managed businesses, which supports serviceability decisions.
The Australian Government’s overview of how cash flow management connects to lender serviceability assessment at business.gov.au sets out how cash flow forecasting, budgeting, and financial reporting work for Australian businesses. While the guidance is aimed at business management rather than lending, the same cash flow analysis lenders perform draws on the same underlying figures. Borrowers with strong cash flow management practices typically present better serviceability positions.
Frequently Asked Questions (FAQs)
1. What is a typical DSCR requirement for commercial loans?
Most commercial lenders require a Debt Service Coverage Ratio (DSCR) of 1.25 to 1.50 for standard commercial property deals, meaning the borrower’s cash flow needs to be 25% to 50% higher than the total debt service requirement. Stronger deals (lower LVR, prime property, established borrowers) sometimes proceed at DSCR closer to 1.20; weaker deals or specialist property may require DSCR above 1.50. The specific threshold varies by lender.
2. How is rental income from commercial property treated?
Commercial rental income is typically shaded by 20% to 40% to allow for vacancy, leasing costs, and outgoings. On a $100,000 gross annual rent, the lender may only recognise $60,000 to $80,000 as serviceable income. The shading depends on lease quality (tenant strength, lease term, security deposits) and property type (specialised property attracts more shading than mainstream office or warehouse).
3. Can I include add-backs that haven’t happened yet?
Generally no. Aspirational add-backs (cost savings that have not yet been achieved, planned salary reductions without history) are usually rejected or heavily discounted. Add-backs need to be either non-cash items already in the financials (depreciation, amortisation), one-off items with clear documentation (specific legal fees, one-off marketing campaigns), or interest on existing debt being refinanced or restructured. Anything more speculative is typically not accepted.
4. What buffer do lenders apply above the loan rate?
Most commercial lenders apply a buffer of 2.5% to 3.5% above the actual loan rate when assessing serviceability. The buffer exists because rates change over the loan’s life and the borrower needs to demonstrate they can service the loan at higher rates as well. APRA requires authorised deposit-taking institutions to apply a 3% buffer on residential loans; many commercial lenders apply similar internal buffers to commercial deals.
5. Do credit cards affect commercial loan serviceability?
Yes, credit cards are included in the commitment side of the serviceability calculation, typically assessed at minimum monthly repayment plus a buffer. Even credit cards with zero balance count as commitments because they represent potential future drawdown. A $20,000 credit card limit can reduce assessed serviceability by $1,000 to $1,500 per month at typical lender assessment rates, even if the borrower pays it in full each month.
6. How does loan term affect serviceability?
Longer loan terms produce lower regular repayments, which makes serviceability easier to meet. A $1 million loan at 6.5% has monthly repayments of approximately $7,757 over 20 years versus $6,752 over 25 years. For borrowers near the edge of serviceability, extending the term can shift the calculation into approval territory, at the cost of higher total interest over the loan’s life. Many borrowers extend the term for approval and then make extra repayments to effectively shorten the loan.
7. Will different lenders calculate my serviceability differently?
Yes, sometimes substantially. Lenders have different policies on income recognition, add-back acceptance, rental income shading, household expense benchmarks, and stress-test buffers. The same borrower can be approved comfortably by one lender, marginal with another, and declined by a third, with no change to the underlying financials. This is why specialist commercial brokers often produce better outcomes than direct applications; the broker knows which lenders’ policies fit each borrower profile.
The Bottom Line
Serviceability is the lender’s test of whether the borrower’s cash flow can comfortably support the proposed loan repayments, with a buffer for adverse changes. The calculation has five inputs: recognisable income, existing commitments, the proposed loan repayment at a stress-tested rate, household or business living expenses, and the loan term and structure. Each input has policy variations between lenders that can materially shift the outcome for the same borrower.
For most borrowers, the smartest approach is to understand the calculation’s mechanics, present financials in a way that supports the strongest justifiable position (clear add-backs, current tax returns, complete commitment disclosure), and route the application to lenders whose policies fit the borrower’s specific profile. A deal that fails one lender’s serviceability framework may pass another’s, with no change to the underlying financials. A specialist commercial broker can usually identify the right routing and prepare the position to give the application its best chance of approval at competitive terms.
