Due Diligence Guide · Adelaide & Melbourne

Red Flags Buyers
Look For

Top 5 Countdown

A Due Diligence Guide for Business Sellers in Adelaide & Melbourne

Selling a business in Adelaide or Melbourne? Before a buyer signs on the dotted line, they’ll scrutinise every aspect of your operation. Understanding what raises red flags during due diligence can mean the difference between a premium sale price and a deal that falls apart.

We’ve compiled the top 5 red flags that experienced buyers and their advisors look for — and exactly how to fix them before going to market. Whether you’re selling a hospitality venue in Adelaide’s CBD, a trades business in Melbourne’s western suburbs, or a professional services firm anywhere in between, these insights will help you maximise your sale outcome.

The Top 5 Countdown

#5 No Employment Contracts or Key Staff Agreements

Buyers need confidence that the team will stay post-acquisition. Without written employment contracts, restraint of trade clauses, or documented roles and responsibilities, buyers see a workforce that could walk out the door on settlement day.

67% of business acquisitions face staff turnover within the first year (William Buck, 2024)

⚠️ What Buyers See

Verbal-only employment arrangements
No restraint of trade or non-compete clauses
Key staff with no documented responsibilities
No training manuals or handover procedures

✅ How to Fix It

Implement written employment contracts for all staff (minimum 12 months before sale)
Include reasonable restraint of trade clauses
Document all roles, responsibilities, and SOPs
Create a staff retention plan with incentive structures

#4 Customer Concentration Risk

If more than 30% of your revenue comes from a single customer (or 50% from your top 3), buyers will discount the value of your business significantly. Losing one key customer post-sale could devastate the business.

40–60% discount applied by buyers when a single client represents >30% of revenue (AIBB, 2025)

⚠️ What Buyers See

One customer accounts for >30% of revenue
Top 3 customers represent >50% of total sales
No formal contracts with major clients
Customers have personal relationships with the owner, not the business

✅ How to Fix It

Actively diversify your customer base 12–24 months before sale
Secure long-term contracts or service agreements with top customers
Transition customer relationships from you to your team
Document customer acquisition channels and retention strategies

#3 Messy or Incomplete Financials

Nothing kills a deal faster than financials that don’t add up. Buyers and their accountants will scrutinise 3 years of financial statements. If your books are inconsistent, contain personal expenses, or lack supporting documentation, expect tough questions — or a withdrawn offer.

71% of failed business sales cite financial discrepancies as a primary factor (MinterEllison M&A Report, 2024)

⚠️ What Buyers See

Mixing personal and business expenses
Inconsistencies between tax returns and management accounts
No monthly financial reporting or management accounts
Cash transactions not properly recorded
Unexplained add-backs without supporting evidence

✅ How to Fix It

Engage an accountant to prepare clean, accrual-based financials for 3+ years
Separate all personal expenses from business accounts immediately
Implement monthly management reporting with commentary
Document and evidence all add-backs and normalisations
Consider a pre-sale Quality of Earnings review

#2 Seller Rushing the Sale or Restricting Access

When a seller pushes for a quick settlement or limits access to information during due diligence, experienced buyers immediately wonder what’s being hidden. Transparency builds trust; restriction destroys it.

85% of deals that progress past due diligence successfully have an organised data room (PwC, 2024)

⚠️ What Buyers See

Pressuring for rapid settlement timelines
Refusing or delaying access to financial records
Limiting buyer meetings with staff or key suppliers
Vague answers to specific due diligence questions
Reluctance to provide customer or supplier references

✅ How to Fix It

Prepare a comprehensive data room before going to market
Allow reasonable due diligence timeframes (typically 30–90 days)
Be transparent about business challenges — buyers will find them anyway
Prepare staff and key suppliers for the transition
Work with a business broker who manages the process professionally

#1 Owner-Dependent Operations

This is the number one deal-killer in Australian SME sales. If the business can’t function without the owner, it’s not really a transferable business — it’s a job. Buyers want a business that runs on systems, not on one person’s relationships, knowledge, or daily involvement.

2.5–3.5x vs 4–6x EBITDA Owner-dependent businesses sell at significant discounts vs systemised businesses (IBISWorld, 2025)

⚠️ What Buyers See

Owner is the primary (or only) customer relationship holder
Critical business knowledge exists only in the owner’s head
No documented systems, processes, or procedures
Owner works 60+ hours per week ‘in’ the business
Revenue drops when the owner takes leave

✅ How to Fix It

Build a management team capable of running day-to-day operations
Document every process — from sales to fulfilment to customer service
Systematically transition customer relationships to your team
Take extended leave to prove the business operates without you
Invest in technology and systems that reduce owner dependency
Implement KPIs and dashboards so the business runs on data, not instinct

Self-Assessment Checklist

Rate your business against these 8 key areas. Score 1 point for each item you can honestly tick off:

All staff have written employment contracts with restraint of trade clauses
No single customer accounts for more than 20% of revenue
3+ years of clean, accrual-based financial statements prepared by an accountant
Monthly management reporting is up to date and consistent
A comprehensive data room is prepared and organised
Documented systems and SOPs exist for all key business processes
The business can operate for 4+ weeks without the owner present
A capable management team is in place with clear succession planning

7–8: Sale-ReadyYou’re well prepared!

4–6: Getting ThereSome gaps to address

1–3: Needs WorkTalk to us first

Frequently Asked Questions

Q: What is the most common reason business sales fall through?

A: Owner dependency and messy financials are the two most common deal-breakers. According to industry data, over 70% of failed sales in the Australian mid-market cite one or both of these issues. Starting preparation 12–24 months before listing gives you the best chance of a successful sale.

Q: How long does business due diligence typically take in Australia?

A: Standard due diligence takes 30–90 days for SME transactions. However, well-prepared sellers with organised data rooms can often reduce this to 3–4 weeks. Complex transactions involving multiple entities, property, or regulatory approvals may take longer.

Q: Can I fix these red flags quickly before selling?

A: Some fixes are quick (organising financials, creating a data room), while others take 6–12+ months (reducing customer concentration, building a management team, documenting systems). The key is to start early — ideally 12–24 months before you plan to go to market.

Q: How do Adelaide and Melbourne business sale markets differ?

A: Both are active markets, but Melbourne typically sees higher transaction volumes and more competitive buyer pools due to its larger economy. Adelaide offers strong opportunities particularly in trades, hospitality, and professional services, often with less buyer competition and more relationship-driven deals. Both markets reward well-prepared sellers with clean financials and documented systems.