Due diligence is the stage where a buyer verifies everything about your agency before completing an acquisition.
It is one of the most important parts of the process — and one of the most common places where deals slow down, change, or fall apart.
What is due diligence?
Due diligence is the buyer’s process for validating the business you have presented. Before this stage, buyers rely on summaries and conversations. During due diligence, they review actual data, documents, and systems.
The goal is simple: confirm that the agency performs as expected and identify any risks that could impact future performance.
If diligence goes well, the deal moves forward. If issues arise, the buyer may renegotiate deal terms or step away.
Why due diligence matters
From a buyer’s perspective, due diligence reduces uncertainty. From a seller’s perspective, it is where trust is either reinforced or weakened.
If your business is clear and well-documented, diligence feels straightforward. If information is inconsistent or incomplete, buyers will assume higher risk.
This is why preparation — covered in agency sale preparation — is so important.
Financial due diligence
Financial review is usually the first and most detailed part of diligence.
Buyers will review:
- Profit and loss statements
- Tax returns
- Balance sheets
- Bank statements
- Revenue by client
- Recurring vs project revenue
- Payroll and contractor costs
- Owner compensation and add-backs
The goal is not just to confirm numbers, but to understand the quality and sustainability of earnings.
See adjusted EBITDA for more context.
Client and revenue diligence
Because agencies are relationship-driven businesses, buyers spend significant time reviewing your client base.
They will evaluate:
- Top clients by revenue
- Client concentration
- Retention and churn
- Contract terms
- Pricing and margins
- Relationship strength
If a small number of clients drive most of your revenue, buyers will assess how likely those clients are to remain after the sale.
Learn more about client concentration risk.
Legal and contract review
Buyers will review legal documents to understand obligations and risks.
This includes:
- Client contracts and scopes of work
- Employee and contractor agreements
- Vendor contracts
- Intellectual property ownership
- Corporate documents
Unclear or informal agreements can create friction during this stage.
Operational diligence
Buyers need to understand how your agency actually operates.
This includes:
- Project management systems
- Service delivery workflows
- Client onboarding
- Reporting processes
- Billing and collections
The more structured your operations are, the easier it is for a buyer to transition the business.
Team and founder dependency
Buyers evaluate how dependent the agency is on the founder.
They will look at:
- Team roles and responsibilities
- Client ownership
- Key employees or contractors
- Knowledge concentration
If the founder is deeply involved in every aspect of the business, the buyer may require a longer transition or different deal structure.
Common issues that impact deals
Deals rarely fail because of small imperfections. They fail when expectations do not match reality.
Common issues include:
- Revenue described as recurring but actually project-based
- Unexpected client churn
- High client concentration
- Unclear contracts or obligations
- Financial inconsistencies
- Hidden founder dependency
How to prepare for due diligence
The best way to prepare is to organize your information before a buyer asks for it.
This includes:
- Clean financial reporting
- Detailed client data
- Clear contracts and documentation
- Defined operational processes
Start with preparing your agency for sale to reduce risk.
What a smooth diligence process looks like
A strong diligence process feels organized and predictable.
- Requests are answered quickly
- Data is consistent and clear
- There are few surprises
- Trust builds between buyer and seller
This leads to faster timelines, stronger deals, and fewer renegotiations.
Want to understand how a buyer would evaluate your agency?
We can help you identify potential issues before they become deal problems.
Request a confidential agency review
Frequently asked questions
What is due diligence in an agency sale?
It is the process where buyers verify financials, clients, contracts, and operations before closing.
What can break a deal?
Inconsistent financials, churn, concentration risk, and unclear contracts are common issues.
How do I prepare?
Organize financials, contracts, and operations ahead of time to reduce risk.