Business Loan Serviceability: How to Calculate and Improve Your Ratios Before You Apply

Most business owners find out their serviceability ratios aren't strong enough after they've already applied. That's the wrong order.

Calculating your Interest Cover Ratio and Debt Service Ratio before you approach a lender gives you time to improve your numbers, address weaknesses, and present a stronger application. Here's how to do it.

Step 1: Calculate Your Current ICR and DSR

Before anything else, know where you stand.

Interest Cover Ratio (ICR)

ICR = EBITDA ÷ Total Annual Interest Payments

Pull your most recent profit and loss statement. Add back interest, tax, depreciation, and amortisation to your net profit to get EBITDA. Then divide by your total annual interest payments across all existing debt.

Example: EBITDA of $420,000 ÷ interest payments of $95,000 = ICR of 4.42. Most lenders want to see above 2.0 — ideally 3.0 or higher.

Debt Service Ratio (DSR)

DSR = EBITDA ÷ Total Annual Debt Repayments (principal + interest)

Use the same EBITDA figure but divide by your total debt repayments — not just interest. This is a harder test because it includes principal reduction.

Example: EBITDA of $420,000 ÷ total repayments of $310,000 = DSR of 1.35. Most lenders want above 1.2 minimum, with 1.5 or higher preferred.

If your ratios sit below these benchmarks, don't apply yet. You have work to do first.

Ready to discuss your options? Book a Strategy Session with Key Choice Lending.

Step 2: Identify What's Dragging Your Ratios Down

Low ratios have specific causes. Identify yours before trying to fix them.

EBITDA is too low

This is the most common issue. Causes include thin margins, high overhead costs, or inconsistent revenue. One-off expenses that reduced profit in recent years can also suppress EBITDA even if underlying performance is sound.

Debt load is too high

High existing debt creates heavy repayment obligations relative to earnings. Multiple facilities — overdrafts, equipment loans, credit cards — compound quickly when totalled.

Interest rates have risen

Rate increases since your loan was established mean your interest payments are higher than when the loan was first approved, reducing your ICR without any change in business performance.

Short loan terms

Short-term facilities require faster principal repayment, which increases your DSR even if interest costs are manageable.

Once you know the cause, you can target the fix.

Step 3: Practical Steps to Improve Your EBITDA

EBITDA improvement takes time — which is why starting before you apply matters.

Review your pricing

Margin compression is often gradual and unnoticed. Review whether your prices still reflect your cost base and market position. Even a 5% price increase on core products can significantly lift EBITDA.

Reduce discretionary overhead

Go through your P&L line by line. Identify costs that don't directly support revenue generation. Subscriptions, underutilised space, non-essential travel, and overstaffing in slow periods all reduce EBITDA unnecessarily.

Timing of one-off expenses

If you have major one-off expenses planned — equipment, fit-outs, marketing campaigns — consider timing them after your loan application. Lenders look at the most recent 12-24 months of financials. Large one-off costs suppress EBITDA in the period they appear.

Address owner salary distortions

Lenders adjust EBITDA for owner salaries above market rates. If you're paying yourself significantly above what a market-rate manager would earn, lenders will reduce your EBITDA accordingly. Understand this adjustment before you present your numbers.

Step 4: Reduce Your Existing Debt Obligations

Improving EBITDA alone may not be enough if debt repayments are excessive.

Consolidate short-term facilities

Multiple short-term loans with high principal repayments can be consolidated into a single longer-term facility. This reduces annual repayments and improves your DSR immediately.

Pay down high-repayment facilities first

If you have capacity, prioritise reducing facilities with the highest principal repayment obligations relative to their balance. This produces the greatest DSR improvement per dollar repaid.

Restructure existing loans

Talk to your current lenders about extending loan terms before you apply for new finance. A longer term reduces annual repayments and improves your DSR, though total interest paid increases. Fees and rates vary by lender and are subject to change.

Eliminate unnecessary facilities

Credit card limits and overdraft facilities reduce your calculated borrowing capacity even if you don't use them. Close facilities you don't need before applying.

Step 5: Time Your Application Strategically

When you apply matters almost as much as how strong your ratios are.

Apply after a strong trading period

If your business is seasonal, apply when your most recent financials reflect peak performance rather than a slow quarter. Lenders typically assess the trailing 12-24 months.

Wait for a full year of improved numbers

If you've made operational improvements, wait until those improvements show clearly in your financial statements before applying. Six months of better performance is less compelling than 12.

Account for rate environment

If rates have risen recently and suppressed your ICR, consider whether a fixed rate restructure of existing debt would stabilise your interest costs and improve the ratio before you apply for new lending.

Prepare for stress testing

Lenders don't just assess your current ratios — they stress test them at higher interest rates and lower revenue scenarios. Build a buffer into your ratios beyond the minimum thresholds. Aim for ICR above 3.0 and DSR above 1.5 before applying.

Working With a Broker on Serviceability

Different lenders weight ratios differently. Some focus heavily on ICR. Others prioritise DSR. Some use earnings multiples for service businesses rather than ratio analysis.

An experienced commercial finance broker can tell you which lenders are most likely to approve your application based on your specific ratio profile. They can also help you identify whether your EBITDA adjustments are being calculated correctly — owner salaries, one-off items, and add-backs can significantly change the picture.

The most common mistake is applying before ratios are ready. The second most common mistake is calculating ratios incorrectly and being surprised during assessment.

Prepare your ratios, improve what you can, and apply when the numbers support your case.

Key Choice Lending has access to 72+ lenders and has supported Australian borrowers through more than $1 billion in transactions. Founder Matthew Clark is a two-time Amazon bestselling author and Better Business Award winner.

Book a Strategy Session — no obligation, focused on your situation.