How to Prepare Your SaaS Company for M&A Due Diligence

Due diligence kills more deals than price disagreements do.

I've been through this process 75 times. The founders who lose money (the ones who get retraded, who watch LOIs fall apart, who close for less than they should have) almost never lose because the buyer changed their mind about the business. They lose because something surfaces in diligence that the buyer uses as leverage.

The preparation you do in the 6 to 12 months before you list determines how that leverage conversation goes.

This is what serious buyers ask for. Here's how to have it ready before they ask.

Why Due Diligence Is Where Deals Actually Break

Most founders assume the hard part is getting a buyer interested. It isn't. In a properly run process, you'll have multiple buyers interested. I average 97 buyer inquiries per listing.

The hard part is keeping the deal alive once diligence starts.

After the LOI is signed, the buyer and their team examine everything: bank statements reconciled against your P&L, tax returns matched against your reported income, customer contracts reviewed for concentration and churn exposure, technical infrastructure assessed for debt and rebuild risk. The lender is doing their own underwriting simultaneously. They're not looking at upside. They're underwriting downside risk.

Every open question in diligence is a potential retrade. Every inconsistency is leverage. Deals break here not because the business isn't good. They break because the business wasn't prepared.

I've watched a deal collapse because the seller's MRR report didn't reconcile with their bank statements by $11,000 over 18 months. That's not a fraud issue. That's a bookkeeping issue. But the buyer's lender used it to question every number in the package.

The 6 Areas Buyers Dig Into and What They're Looking For

1. Financials

This is the core of diligence. Buyers and lenders want:

• Three years of monthly P&Ls (not annual; monthly)
• Bank statements for every account, reconciled to the P&L
• Tax returns (3 years)
• A clear explanation of every addback

The standard that kills deals: cash-basis accounting on a business with meaningful inventory or deferred revenue. If you're running accrual-based revenue on a cash-basis P&L, the gap between what you report and what a lender will underwrite becomes a negotiation problem. Clean this up before you go to market.

For deals above $3M SDE, I recommend commissioning a quality of earnings (QoE) report before listing. Not after the buyer orders it. When you own the QoE, you control the narrative. When the buyer's team produces it, every finding is framed as a risk they're absorbing.

What good looks like: Monthly financials on an accounting system (QuickBooks, Xero, NetSuite), accrual-based if you have significant receivables or deferred revenue, personal expenses clearly identified and documented as addbacks.

2. Revenue Quality and MRR Integrity

For SaaS, buyers underwrite revenue quality more than revenue size. The questions they're asking:

• Does your MRR waterfall reconcile? New MRR + expansion MRR minus churned MRR minus contraction MRR should equal your ending MRR every month.
• What is your annual churn rate, and is it accelerating?
• What is your net revenue retention (NRR)?
• What is the average contract length, and what are the renewal terms?
• Are any contracts at risk of non-renewal in the next 12 months?

NRR above 100% means your existing customers expand faster than they churn. That number changes the multiple. NRR below 80% means the buyer has to run hard just to stay flat. They'll price that risk into the deal.

Build an MRR waterfall in a spreadsheet that shows every category clearly, reconciled to bank deposits, for the last 24 months minimum.

3. Customer Concentration

Concentration is a lender issue as much as a buyer issue. Most SBA lenders have hard limits: if a single customer represents more than 20 to 25% of revenue, the deal may not qualify for conventional financing. That doesn't kill all deals. But it changes who can buy it and how.

Buyers also assess customer quality beyond concentration. They want to know:

• Who are your top 10 customers by ARR?
• What contracts do they have and when do they renew?
• What is the relationship? Does the founder manage it personally, or is there a team?
• Have any of them made noises about churning or renegotiating?

What good looks like: No single customer above 15% of ARR. Top 10 customers collectively under 40%. Documented account management process that doesn't depend entirely on the founder.

4. Owner Dependency

This is the one that founders underestimate most. Buyer concern here isn't that you run the business. It's whether the business can run without you.

There are two versions of owner dependency that kill deals:

Version 1: Operational dependency. The founder answers every support ticket, manages every vendor relationship, and holds all the tribal knowledge. No SOPs, no documented processes, no team capable of making decisions. A buyer can't underwrite a business where the entire operation lives in one person's head.

Version 2: Sales dependency. The founder is the only salesperson. Every enterprise relationship runs through them personally. There is no documented sales process, no CRM, no pipeline. When asked "who closes the deals?", the honest answer is "I do."

Sales dependency is the version that kills valuations specifically in SaaS. A B2B SaaS company with $2M ARR and a documented, team-run sales process is a fundamentally different asset than one where the founder personally closes every enterprise account. Buyers know they can't replicate the founder's relationships ; they discount the revenue that depends on them.

Fix this before you list. Document your sales process. Build the CRM. Hire one junior sales person and let them run the process with your coaching. Record Zoom walkthroughs of your daily operations. You don't need to be gone. You need to demonstrate the business doesn't collapse if you leave.

5. Technical Infrastructure

Buyers bring technical advisors into diligence for SaaS deals. They're assessing:

• Code quality and technical debt
• Infrastructure costs and scalability
• Dependencies on third-party platforms or APIs
• Security and compliance (SOC 2, HIPAA, GDPR depending on your customer base)
• Documentation: is there an engineering wiki, a deployment runbook, anything?

Technical debt isn't automatically disqualifying. Buyers build in rebuild costs and they understand that early-stage SaaS companies accumulate debt. What they can't work with is invisible debt. Where they can't assess the scope because there's no documentation.

If your infrastructure is messy, document what you know. A founder who can clearly explain the debt, the cost to address it, and the timeline is in a much better position than one who says "the engineers handle it."

6. Legal and IP

This area is often overlooked until it's urgent:

• Does the company own the IP? Or is it partly owned by a contractor who never signed a proper IP assignment agreement?
• Are there any pending or threatened legal disputes?
• Are your customer contracts properly executed and stored?
• Do your employee and contractor agreements include IP assignment and non-solicitation clauses?
• Do you have any liens or outstanding debt against the business?

Get these into a clean data room. An LOI signed with a buyer who then discovers an IP dispute mid-diligence is a deal in serious trouble. You'll be the one making concessions to keep it alive.

Build the Data Room Before You Go to Market

Most sellers start gathering documents after the LOI is signed. That's backwards.

Every day a diligence request sits unanswered is a day the deal stays open. Every open deal is exposure: market changes, lender sentiment shifts, competitor moves, or the buyer simply getting cold feet. I've watched deals die not because of anything in the documents, but because the timeline stretched long enough for external risk to arrive.

The founders who come to me with a data room already built (organized, clean, complete) close faster and with less retrade pressure. The buyer has no ammunition. There are no open questions. The diligence process becomes a formality rather than a negotiation.

What to have ready before you go to market:

• 3 years of monthly P&Ls, bank statements, and tax returns
• MRR waterfall for 24 months, reconciled to deposits
• Customer concentration report (top 10 by ARR, % of total)
• All customer contracts in a folder, organized by size
• SOPs or recorded operational walkthroughs
• Sales process documentation and CRM export
• Technical architecture overview and known debt inventory
• IP ownership documentation
• Any existing legal agreements (NDAs, non-solicit, shareholder agreements)

The 90-Day Pre-Listing Sprint

If you're planning to go to market in the next 6 to 12 months, here's how to spend the 90 days before you engage a buyer:

Days 1 to 30: Financial cleanup. Get onto accrual-based accounting if you aren't already. Reconcile every month of the last 24 months: P&L to bank statement, MRR waterfall to deposits. Identify and document every addback. Pull your tax returns and make sure the story they tell matches the story your P&L tells.

Days 31 to 60: Operations and sales. Build or record SOPs for every repeatable process. Export your CRM, clean the data, and map your sales pipeline so someone other than you can follow it. If you're the only salesperson, assign one deal to someone else and document the process they'd need to close it.

Days 61 to 90: Customer and legal cleanup. Pull every customer contract and organize by ARR. Flag any renewals coming up in the next 12 months. Verify IP assignment agreements with contractors. Review any outstanding legal exposure. Have an attorney do a 2-hour review of your cap table and contract stack. It's cheap compared to what an open question costs in diligence.

If you're not sure where your valuation sits today, the SaaS valuation calculator is a useful orientation before you start the prep sprint. Know the number you're building toward before you build.

What Happens When You Don't Prepare

I'll give you one concrete example.

A founder came to me with a B2B SaaS doing $1.8M ARR. Good product. Strong NRR. Growing. He was ready to sell.

We went to market. Got an LOI within weeks at a number he was happy with. Then diligence started.

The buyer's team found that his MRR reports and bank statements had persistent small discrepancies. Nothing intentional; just inconsistent accounting practices from his first two years. They also found that his top three customers, representing 52% of ARR, had all been closed personally by the founder, and there was no documented relationship with anyone else at the company.

The buyer didn't walk. But they did retrade. They came back with a lower offer and a heavier earnout. Essentially: we'll pay you the rest if you can prove the revenue holds after you leave.

That earnout was worth $400,000 on paper. Whether he ever collected it depends on hitting growth targets after he's already out. He might. Or the earnout triggers might not land.

That entire scenario is preventable. Clean financials and a documented sales process would have left nothing on the table. Neither requires more than 6 to 12 months of focused attention.

Every Deal Breaks 8 to 9 Times

I tell this to every founder I work with. That's not pessimism. It's operational reality.

The $17M women's health and beauty deal I've referenced before: signed LOI, months of completed diligence, financing approved, lawyers aligned. We were scheduled to close on a Friday. The seller wanted to push for a small earnout addition. A relatively minor ask. It delayed closing by one business day.

Monday morning, new tariffs on China were announced. The lender got nervous about inventory exposure and pulled the financing.

Eight figures, gone, because of a one-day delay.

Momentum protects deals. The preparation you do before the process starts is what lets you move quickly, close cleanly, and protect momentum when the deal gets fragile. It will get fragile.

The question isn't whether your deal will break. It's whether you've done the work that lets you put it back together.

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If you're thinking about an exit in the next 12 to 24 months, the due diligence preparation is where that work starts. I run a process that brings 40 serious buyers to the table. How those conversations go depends on what you've built before they arrive.

Start with the SaaS exit strategy framework if you haven't already. The due diligence prep lives inside a larger process. Understanding the full arc changes how you approach each piece.

Or reach out directly. First conversation is always about understanding where you are and what the timeline looks like.