Imagine this: your biggest client pulls the plug tomorrow – no warning, no buffer. For many business owners, that’s not just a nightmare scenario; it’s a plausible risk. According to the latest SME Growth Index Report, by ScotPac, almost one in five Australian SMEs believe they’d go out of business if one major client or supplier failed.
It’s a clear reminder of the risks of over-reliance – and a timely prompt to diversify.
The client concentration risk you can’t afford
ScotPac’s study shows that 76% of small to medium enterprises (SMEs) admit that losing a key client would hurt their business, with an average revenue drop of 22%. Shockingly, 7% of SMEs said they were unsure of how they’d be affected in this scenario, which highlights the fact that many business owners are unaware of this risk
This vulnerability exists amid a surge in business insolvencies. Insolvency statistics from the Australian Securities and Investments Commission (ASIC) show that 9,429 companies entered external administration during the first eight months of the 2024-25 financial year, up 42.6% from the 6,611 companies recorded for the same period in 2023-24.
Why a single client can become your Achilles’ heel
This risk isn’t just anecdotal – it’s supported by well-established business theory. Customer concentration risk, widely recognised in risk management and private equity circles, flags companies where one client makes up more than 15 – 20% of total revenue. When that client departs, the financial shock can be catastrophic, disrupting operations, destabilising cash flow and impairing decision-making agility.
Supporting this is the resource dependence theory, which argues that firms become strategically vulnerable when dependent on external entities that control critical resources, like revenue, distribution or supply. This imbalance limits a company’s autonomy and forces it to prioritise short-term survival over long-term innovation.
In practical terms, that plays out like this:
- Cash-flow chaos: A sudden 20 – 30% drop in income can derail payroll, supplier invoices and rent payments.
- Reduced resilience: Without diverse revenue sources, SMEs struggle to absorb external shocks or market changes.
- Strategic paralysis: Heavy dependence on one client can lead to decision-making that serves that relationship alone, at the cost of broader business goals.
With nearly 60% of declining-growth SMEs now in outright contraction, the risks of over-reliance are becoming clear. The takeaway? It’s important to address vulnerabilities early.
Smart strategies to build resilience
It isn’t about rejecting big clients – it’s about ensuring your business can withstand their loss. Here’s how:
- Set a concentration threshold: Cap revenue reliance on any one client at 15 – 20%: a common benchmark used by lenders and investors to assess financial health.
- Broaden your customer base: Target new industries, smaller clients or regional markets. A well-diversified client list insulates you from shocks.
- Introduce new offerings: Additional services or products can reduce dependence on a narrow revenue stream.
- Stress-test your model: Run “what if” scenarios with your broker or accountant. What would a sudden 25% revenue drop do to your business?
- Secure flexible funding: Access to adaptable finance solutions – such as revolving credit facilities, short-term loans or invoice financing – can help stabilise cash flow during lean periods and cushion against unexpected revenue gaps.
The message is clear: one relationship should never make or break your business. And the best time to diversify your revenue, expand your client base and strengthen your funding position is before the pressure hits. Because once the contract is gone, it may already be too late to pivot.