The 7 Reasons M&A Deals Fall Apart at the Finish Line (and How to Save Yours)
About 30 percent of signed LOIs never make it to a wire. Here are the seven killers, and how to deal-proof your business before you ever sign.
The Uncomfortable Stat
~70%
LOIs That Close
~30%
LOIs That Die
60-120
Days LOI to Close
Most sellers think the hard part of selling is finding a buyer. Actually, the hard part is getting from a signed LOI to a wire transfer. Almost a third of deals die after the handshake, and almost all of those deaths are preventable.
Here are the seven reasons we see most often, what each one looks like, and exactly how to prevent it.
Quality of Earnings Surprises
What it looks like: The buyer's QoE provider rejects add-backs the seller claimed, recasts depreciation, or finds that owner compensation was understated. SDE drops 10-20 percent. The multiple stays the same, so the price drops by the same percentage.
How to prevent it: Commission your own sell-side QoE before going to market. Fix issues proactively. Reject add-backs that won't survive scrutiny.
Customer Concentration Discovered
What it looks like: The data room reveals that one customer is 35 percent of revenue, and the seller didn't disclose it up front. The buyer either retrades hard or walks.
How to prevent it: Disclose concentration in the teaser. Price in the risk before the buyer does. Start diversifying revenue 12-24 months before going to market.
Working Capital Peg Disputes
What it looks like: The LOI used vague peg language. When the buyer's accountants calculate the target, it comes in $300K higher than expected. The seller refuses to deliver it. Deal stalls.
How to prevent it: Negotiate the peg definition and target in the LOI itself, not after. Attach a sample calculation as a schedule.
Seller Gets Cold Feet
What it looks like: A health scare, a divorce, a child's news, or just exhaustion. Halfway through a 90-day diligence process, the seller decides they can't go through with it.
How to prevent it: Decide why you're selling before you sign the LOI. Talk to your spouse and your wealth advisor first. Visualize day-one-after-sale before you commit.
Buyer Financing Falls Through
What it looks like: SBA declines the file over a covenant issue. Private equity fund can't get their lender to clear committee. Strategic buyer's board pulls the mandate.
How to prevent it: Require proof of funds before signing an LOI. Ask for a financing commitment letter, not just a term sheet. Prefer cash-on-hand buyers when you can.
Key Employee Quits Mid-Deal
What it looks like: The general manager or lead engineer resigns during diligence. The buyer sees the risk and either retrades or withdraws.
How to prevent it: Sign retention bonuses with key employees before going to market. Make sure institutional knowledge is documented in SOPs, not in one person's head.
Legal or Environmental Surprise
What it looks like: Pending litigation surfaces in diligence. An environmental assessment reveals contamination. A regulatory filing was missed. Any one of these can kill a deal overnight.
How to prevent it: Do a pre-sale legal and environmental audit. Disclose known issues. Fix what you can fix. Nothing derails a deal faster than a surprise lawsuit showing up in a UCC search.
How to Deal-Proof Your Business Before Going to Market
Most deals die from issues that existed months or years before the LOI was signed. Fix them now and your deal close rate goes from 70 percent to 90+ percent.
- Get a sell-side QoE, Pay $15K-$40K for a third-party Quality of Earnings review before going to market. Find the issues yourself. Fix or disclose them. No surprises in diligence.
- Diversify customer revenue, If any single customer is over 20 percent, start diversifying 12-24 months before sale. New customer acquisition matters more than top-line growth in this window.
- Lock in key employees, Stay bonuses for the top 2-3 people, payable at close plus 6-12 months. $25K-$100K depending on role. Low-cost insurance.
- Clean up the balance sheet, Pay off related-party loans. Write off dead inventory. Collect stale receivables. Make the balance sheet match reality.
- Document the business, SOPs, org charts, vendor lists, customer lists, contracts in one place. If it only lives in your head, the buyer discounts the deal.
- Pre-audit for legal issues, Run a UCC search on yourself. Check for pending litigation. Resolve or disclose anything outstanding.
- Hire the right advisor, An M&A advisor keeps the process moving, plays the middleman when things get tense, and knows when to push vs. when to fold.
Thinking about going to market?
BridgeBook only lists businesses $750K and up. No upfront fees. We help you deal-proof before you ever see a buyer.
How BridgeBook Handles Deal-Break Risk
- Pre-market readiness assessment, every listing goes through a gap analysis before it goes live
- Verified buyer pool, proof of funds, ID check, and competitor block before access
- Structured LOI templates with clear working capital peg definitions
- Diligence project management, we keep both sides moving on a shared timeline
- Access to sell-side QoE providers and M&A attorneys when needed
- 1-10% commission depending on deal size, paid only when you close
Industry matters too. Deal-break risk is different in SaaS than in home care than in manufacturing. Read our SaaS valuation guide, our home care valuation guide, or our manufacturing valuation guide for category-specific diligence landmines.
Frequently Asked Questions
What percentage of M&A deals actually close after an LOI is signed?
In the lower middle market, roughly 70 percent of signed LOIs actually reach closing. The other 30 percent die in due diligence, legal, or financing. Deal break rates are higher for businesses under $1M in SDE and lower for businesses with clean financials, diversified customer bases, and professional advisors on both sides.
What is a Quality of Earnings report and why does it matter?
A Quality of Earnings (QoE) report is a third-party accounting review that validates a seller's claimed earnings and add-backs. Buyers order them during due diligence. The QoE is where most deals get retraded, if the accountants reject add-backs or find errors, the price drops. Smart sellers commission a sell-side QoE before going to market so there are no surprises.
How much customer concentration is too much?
Anything over 20 percent from a single customer starts to raise concerns. Over 30 percent and buyers will want protection, usually an earnout tied to that customer staying, or a price reduction. Over 50 percent and many financial buyers walk away entirely. Strategic buyers may still engage, but the deal structure will reflect the risk.
How long does a typical M&A deal take from LOI to close?
Plan for 60 to 120 days from signed LOI to wire. Strategic buyers with cash on hand can close in 45 days. SBA deals typically take 90 to 120 days because of underwriting. Private equity deals run 75 to 100 days. The biggest variable is how quickly the seller can produce clean diligence materials.
What is the single best thing I can do to prevent my deal from falling through?
Do a sell-side Quality of Earnings and customer concentration analysis before you sign an LOI. Fix or disclose every issue in the teaser or CIM. Deals die when surprises emerge in diligence, if the buyer knew the issue existed when they signed the LOI, they cannot use it to retrade the price later.
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