Selling a business well is one of the biggest financial decisions a founder ever makes. Done properly, it can transform your finances and set up your next chapter. Done reactively, it can leave 20-40% of the potential sale value on the table.
This guide covers what UK business owners need to do in the 2-3 years before a sale to maximise what they walk away with.
Why so many exits underperform
Most business sales that leave money on the table share a similar story. The founder either received an unexpected approach and had six months to prepare, or they decided they wanted out and put the business up for sale within a year of that decision.
In both cases, the timeline forces compromises. There isn’t time to fix the messy books. Not time to reduce founder dependency. Not time to diversify the customer base. And buyers price all of that in.
The founders who exit well almost always started preparing 2-3 years before they were emotionally ready to sell.
What buyers actually look at
When a serious buyer starts due diligence, they focus on a fairly predictable set of things.
Financial history
- Three or more years of clean, professionally prepared accounts
- Consistent (or growing) revenue and profitability
- Clear, defensible margins
- No unexplained one-off items
Customer concentration
- No single customer accounting for more than 20% of revenue
- Recurring or contracted revenue clearly identified
- Customer relationships held by the business, not just the founder
Operational independence
- The business runs when the founder is on holiday
- Key processes are documented, not held in one person’s head
- Middle management can handle day-to-day decisions
Compliance and risk
- Clean tax and legal history
- Employment contracts up to date
- Data protection and other regulatory compliance current
- No pending disputes or claims
Systems and infrastructure
- Modern accounting software with clean data
- CRM and operational systems that work
- Intellectual property properly owned by the business
- Clear organisational structure
The 2-year prep timeline
24-18 months before sale
- Get your accounts onto proper cloud accounting software (if not already)
- Clean up any long-standing bookkeeping mess
- Start documenting the processes only you know
- Identify customer concentration risks and start diversifying
- Establish a simple management reporting rhythm
18-12 months before sale
- Bring in a management layer if you don’t have one
- Start reducing your involvement in day-to-day operations
- Address any known compliance issues
- Review and update all contracts (customer, supplier, employment)
- Get twelve months of clean, professional accounts under your belt
12-6 months before sale
- Engage professional advisers (corporate finance, tax specialist, solicitor)
- Prepare information memorandum
- Ensure the last twelve months of trading show your business at its best
- Address any final due diligence red flags
Final 6 months
- Actively market the business through your advisers
- Manage due diligence process
- Negotiate terms and structure
- Plan tax-efficient sale structure with your accountant
Tax considerations for sellers
The tax you pay on selling your business can significantly affect your net proceeds. Key considerations:
Business Asset Disposal Relief (formerly Entrepreneurs’ Relief) can reduce Capital Gains Tax on qualifying disposals up to the lifetime limit. Rules are strict and require careful planning.
Substantial Shareholdings Exemption can eliminate Corporation Tax on some disposals of subsidiary companies.
Deal structure matters: share sale vs asset sale has significantly different tax implications for both seller and buyer.
Timing across tax years can create significant tax savings, particularly around any anticipated rate changes.
Note: tax rules change regularly, and reforms to Capital Gains Tax and business reliefs have been repeatedly discussed. Always verify the current position with your accountant and specialist tax adviser before committing to any structure.
The mistake that costs the most
The single biggest mistake we see is founders who spend 15 years building a business, then leave the preparation for its sale to the last six months. That’s like spending 15 years writing a book and then editing it in a weekend.
The businesses that command premium multiples are almost always the ones where the sale prep looked identical to good business practice. Clean books. Strong systems. Genuine leadership team. Diverse customers. Because good business practice IS good sale prep.
If a sale is anywhere on your five-year horizon, the conversation to have is now. Not when you’re ready to sell.
Want to explore what sale prep would look like for your business? Send us a message. It’s one of the highest-value planning conversations we have with owner-directors.
